BitmapFilter.cs

Description du code

BitmapFilter.cs est un fichier du projet PhotoBrol.
Ce fichier est situé dans /var/www/bin/sniplets/bibliobrol/photobrol/.

Projet PhotoBrol :
Editeur d'images en CSharp.
Code source ou contenu du fichier

Code c# (BitmapFilter.cs) (1529 lignes)
using System;
using System.Drawing;
using System.Drawing.Imaging;
 
namespace be.gaudry.photobrol.model.filters
{
	public class BitmapFilter
	{
		public const short EDGE_DETECT_KIRSH		= 1;
		public const short EDGE_DETECT_PREWITT		= 2;
		public const short EDGE_DETECT_SOBEL		= 3;
 
		public static bool Invert(Bitmap b)
		{
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				for(int y=0;y<b.Height;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{
						p[0] = (byte)(255-p[0]);
						++p;
					}
					p += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
 
			return true;
		}
 
		public static bool GrayScale(Bitmap b)
		{
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
            BitmapData bmpData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
            int remain = bmpData.Stride - bmpData.Width * 3;
            unsafe
            {
                byte* ptr = (byte*)bmpData.Scan0;
                byte t;
                for (int i = 0; i < bmpData.Height; i++)
                {
                    for (int j = 0; j < bmpData.Width; j++)
                    {
                        //t = (byte)(0.333 * ptr[2] + 0.333 * ptr[1] + 0.334 * ptr[0]);
                        t = (byte)(.299 * ptr[2] + .587 * ptr[1] + .114 * ptr[0]);
                        ptr[2] = t;
                        ptr[1] = t;
                        ptr[0] = t;
                        ptr += 3;
                    }
                    ptr += remain;
                }
            }
            b.UnlockBits(bmpData);
            return true;
		}
		public static bool Brightness(Bitmap b, int nBrightness)
		{
			if (nBrightness < -255 || nBrightness > 255)
				return false;
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
 
			int nVal = 0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				for(int y=0;y<b.Height;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{
						nVal = (int) (p[0] + nBrightness);
 
						if (nVal < 0) nVal = 0;
						if (nVal > 255) nVal = 255;
 
						p[0] = (byte)nVal;
 
						++p;
					}
					p += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
 
			return true;
		}
 
		public static bool Contrast(Bitmap b, sbyte nContrast)
		{
			if (nContrast < -100) return false;
			if (nContrast >  100) return false;
 
			double pixel = 0, contrast = (100.0+nContrast)/100.0;
 
			contrast *= contrast;
 
			int red, green, blue;
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
 
				int nOffset = stride - b.Width*3;
 
				for(int y=0;y<b.Height;++y)
				{
					for(int x=0; x < b.Width; ++x )
					{
						blue = p[0];
						green = p[1];
						red = p[2];
 
						pixel = red/255.0;
						pixel -= 0.5;
						pixel *= contrast;
						pixel += 0.5;
						pixel *= 255;
						if (pixel < 0) pixel = 0;
						if (pixel > 255) pixel = 255;
						p[2] = (byte) pixel;
 
						pixel = green/255.0;
						pixel -= 0.5;
						pixel *= contrast;
						pixel += 0.5;
						pixel *= 255;
						if (pixel < 0) pixel = 0;
						if (pixel > 255) pixel = 255;
						p[1] = (byte) pixel;
 
						pixel = blue/255.0;
						pixel -= 0.5;
						pixel *= contrast;
						pixel += 0.5;
						pixel *= 255;
						if (pixel < 0) pixel = 0;
						if (pixel > 255) pixel = 255;
						p[0] = (byte) pixel;					
 
						p += 3;
					}
					p += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
 
			return true;
		}
 
		public static bool Gamma(Bitmap b, double red, double green, double blue)
		{
			if (red < .2 || red > 5) return false;
			if (green < .2 || green > 5) return false;
			if (blue < .2 || blue > 5) return false;
 
			byte [] redGamma = new byte [256];
			byte [] greenGamma = new byte [256];
			byte [] blueGamma = new byte [256];
 
			for (int i = 0; i< 256; ++i)
			{
				redGamma[i] = (byte)Math.Min(255, (int)(( 255.0 * Math.Pow(i/255.0, 1.0/red)) + 0.5));
				greenGamma[i] = (byte)Math.Min(255, (int)(( 255.0 * Math.Pow(i/255.0, 1.0/green)) + 0.5));
				blueGamma[i] = (byte)Math.Min(255, (int)(( 255.0 * Math.Pow(i/255.0, 1.0/blue)) + 0.5));
			}
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
 
				int nOffset = stride - b.Width*3;
 
				for(int y=0;y<b.Height;++y)
				{
					for(int x=0; x < b.Width; ++x )
					{
						p[2] = redGamma[ p[2] ];
						p[1] = greenGamma[ p[1] ];
						p[0] = blueGamma[ p[0] ];
 
						p += 3;
					}
					p += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
 
			return true;
		}
 
		public static bool ColorAvgLum(Bitmap b, int red, int green, int blue)
		{
			if (red < -255 || red > 255) return false;
			if (green < -255 || green > 255) return false;
			if (blue < -255 || blue > 255) return false;
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
            BitmapData bmpData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
            int remain = bmpData.Stride - bmpData.Width * 3;
            unsafe
            {
                byte* ptr = (byte*)bmpData.Scan0;
                byte temp, t;
                byte avg = (byte)((red + green + blue) / 3); ;
                for (int i = 0; i < bmpData.Height; i++)
                {
                    for (int j = 0; j < bmpData.Width; j++)
                    {
                        //t = (byte)(0.333 * ptr[2] + 0.333 * ptr[1] + 0.334 * ptr[0]);
                        temp = (byte)(.299 * ptr[2] + .587 * ptr[1] + .114 * ptr[0]);
                        t = (temp - avg > 0) ? (byte)(temp - avg) : (byte)0;
                        ptr[2] = ((byte)(((t + red) > 255) ? 255 : t + red));
                        ptr[1] = ((byte)(((t + green) > 255) ? 255 : t + green));
                        ptr[0] = ((byte)(((t + blue) > 255) ? 255 : t + blue));
                        ptr += 3;
                    }
                    ptr += remain;
                }
            }
            b.UnlockBits(bmpData);
            return true;
		}
 
 
 
        public static bool colorFast(Bitmap b, int red, int green, int blue)
        {
            if (red < -255 || red > 255) return false;
            if (green < -255 || green > 255) return false;
            if (blue < -255 || blue > 255) return false;
 
            // !! Don't forget GDI+ uses BGR format and nor RGB !!!
            BitmapData bmpData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
            int remain = bmpData.Stride - bmpData.Width * 3;
            unsafe
            {
                byte* ptr = (byte*)bmpData.Scan0;
                byte t;
                for (int i = 0; i < bmpData.Height; i++)
                {
                    for (int j = 0; j < bmpData.Width; j++)
                    {
                        //t = (byte)(0.333 * ptr[2] + 0.333 * ptr[1] + 0.334 * ptr[0]);
                        t = (byte)(.299 * ptr[2] + .587 * ptr[1] + .114 * ptr[0]);
                        ptr[2] = ((byte)(((t + red) > 255) ? 255 : t + red));
                        ptr[1] = ((byte)(((t + green) > 255) ? 255 : t + green));
                        ptr[0] = ((byte)(((t + blue) > 255) ? 255 : t + blue));
                        ptr += 3;
                    }
                    ptr += remain;
                }
            }
            b.UnlockBits(bmpData);
            return true;
        }
 
		public static bool Conv3x3(Bitmap b, ConvMatrix m)
		{
			// Avoid divide by zero errors
			if (0 == m.Factor) return false;
 
			Bitmap bSrc = (Bitmap)b.Clone(); 
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmSrc = bSrc.LockBits(new Rectangle(0, 0, bSrc.Width, bSrc.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			int stride2 = stride * 2;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr SrcScan0 = bmSrc.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * pSrc = (byte *)(void *)SrcScan0;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width - 2;
				int nHeight = b.Height - 2;
 
				int nPixel;
 
				for(int y=0;y < nHeight;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{
						nPixel = ( ( ( (pSrc[2] * m.TopLeft) + (pSrc[5] * m.TopMid) + (pSrc[8] * m.TopRight) +
							(pSrc[2 + stride] * m.MidLeft) + (pSrc[5 + stride] * m.Pixel) + (pSrc[8 + stride] * m.MidRight) +
							(pSrc[2 + stride2] * m.BottomLeft) + (pSrc[5 + stride2] * m.BottomMid) + (pSrc[8 + stride2] * m.BottomRight)) / m.Factor) + m.Offset); 
 
						if (nPixel < 0) nPixel = 0;
						if (nPixel > 255) nPixel = 255;
 
						p[5 + stride]= (byte)nPixel;
 
						nPixel = ( ( ( (pSrc[1] * m.TopLeft) + (pSrc[4] * m.TopMid) + (pSrc[7] * m.TopRight) +
							(pSrc[1 + stride] * m.MidLeft) + (pSrc[4 + stride] * m.Pixel) + (pSrc[7 + stride] * m.MidRight) +
							(pSrc[1 + stride2] * m.BottomLeft) + (pSrc[4 + stride2] * m.BottomMid) + (pSrc[7 + stride2] * m.BottomRight)) / m.Factor) + m.Offset); 
 
						if (nPixel < 0) nPixel = 0;
						if (nPixel > 255) nPixel = 255;
 
						p[4 + stride] = (byte)nPixel;
 
						nPixel = ( ( ( (pSrc[0] * m.TopLeft) + (pSrc[3] * m.TopMid) + (pSrc[6] * m.TopRight) +
							(pSrc[0 + stride] * m.MidLeft) + (pSrc[3 + stride] * m.Pixel) + (pSrc[6 + stride] * m.MidRight) +
							(pSrc[0 + stride2] * m.BottomLeft) + (pSrc[3 + stride2] * m.BottomMid) + (pSrc[6 + stride2] * m.BottomRight)) / m.Factor) + m.Offset); 
 
						if (nPixel < 0) nPixel = 0;
						if (nPixel > 255) nPixel = 255;
 
						p[3 + stride] = (byte)nPixel;
 
						p += 3;
						pSrc += 3;
					}
					p += nOffset;
					pSrc += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			bSrc.UnlockBits(bmSrc);
 
			return true;
		}
 
		public static bool Smooth(Bitmap b, int nWeight /* default to 1 */)
		{
			ConvMatrix m = new ConvMatrix();
			m.SetAll(1);
			m.Pixel = nWeight;
			m.Factor = nWeight + 8;
 
			return  BitmapFilter.Conv3x3(b, m);
		}
 
		public static bool GaussianBlur(Bitmap b, int nWeight /* default to 4*/)
		{
			ConvMatrix m = new ConvMatrix();
			m.SetAll(1);
			m.Pixel = nWeight;
			m.TopMid = m.MidLeft = m.MidRight = m.BottomMid = 2;
			m.Factor = nWeight + 12;
 
			return  BitmapFilter.Conv3x3(b, m);
		}
		public static bool MeanRemoval(Bitmap b, int nWeight /* default to 9*/ )
		{
			ConvMatrix m = new ConvMatrix();
			m.SetAll(-1);
			m.Pixel = nWeight;
			m.Factor = nWeight - 8;
 
			return BitmapFilter.Conv3x3(b, m);
		}
		public static bool Sharpen(Bitmap b, int nWeight /* default to 11*/ )
		{
			ConvMatrix m = new ConvMatrix();
			m.SetAll(0);
			m.Pixel = nWeight;
			m.TopMid = m.MidLeft = m.MidRight = m.BottomMid = -2;
			m.Factor = nWeight - 8;
 
			return  BitmapFilter.Conv3x3(b, m);
		}
		public static bool EmbossLaplacian(Bitmap b)
		{
			ConvMatrix m = new ConvMatrix();
			m.SetAll(-1);
			m.TopMid = m.MidLeft = m.MidRight = m.BottomMid = 0;
			m.Pixel = 4;
			m.Offset = 127;
 
			return  BitmapFilter.Conv3x3(b, m);
		}	
		public static bool EdgeDetectQuick(Bitmap b)
		{
			ConvMatrix m = new ConvMatrix();
			m.TopLeft = m.TopMid = m.TopRight = -1;
			m.MidLeft = m.Pixel = m.MidRight = 0;
			m.BottomLeft = m.BottomMid = m.BottomRight = 1;
 
			m.Offset = 127;
 
			return  BitmapFilter.Conv3x3(b, m);
		}
 
		public static bool EdgeDetectConvolution(Bitmap b, short nType, byte nThreshold)
		{
			ConvMatrix m = new ConvMatrix();
 
			// I need to make a copy of this bitmap BEFORE I alter it 80)
			Bitmap bTemp = (Bitmap)b.Clone();
 
			switch (nType)
			{
				case EDGE_DETECT_SOBEL:
					m.SetAll(0);
					m.TopLeft = m.BottomLeft = 1;
					m.TopRight = m.BottomRight = -1;
					m.MidLeft = 2;
					m.MidRight = -2;
					m.Offset = 0;
					break;
				case EDGE_DETECT_PREWITT:
					m.SetAll(0);
					m.TopLeft = m.MidLeft = m.BottomLeft = -1;
					m.TopRight = m.MidRight = m.BottomRight = 1;
					m.Offset = 0;
					break;
				case EDGE_DETECT_KIRSH:
					m.SetAll(-3);
					m.Pixel = 0;
					m.TopLeft = m.MidLeft = m.BottomLeft = 5;
					m.Offset = 0;
					break;
			}
 
			BitmapFilter.Conv3x3(b, m);
 
			switch (nType)
			{
				case EDGE_DETECT_SOBEL:
					m.SetAll(0);
					m.TopLeft = m.TopRight = 1;
					m.BottomLeft = m.BottomRight = -1;
					m.TopMid = 2;
					m.BottomMid = -2;
					m.Offset = 0;
					break;
				case EDGE_DETECT_PREWITT:
					m.SetAll(0);
					m.BottomLeft = m.BottomMid = m.BottomRight = -1;
					m.TopLeft = m.TopMid = m.TopRight = 1;
					m.Offset = 0;
					break;
				case EDGE_DETECT_KIRSH:
					m.SetAll(-3);
					m.Pixel = 0;
					m.BottomLeft = m.BottomMid = m.BottomRight = 5;
					m.Offset = 0;
					break;
			}
 
			BitmapFilter.Conv3x3(bTemp, m);
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmData2 = bTemp.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr Scan02 = bmData2.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * p2 = (byte *)(void *)Scan02;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				int nPixel = 0;
 
				for(int y=0;y<b.Height;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{
						nPixel = (int) Math.Sqrt((p[0]*p[0]) + (p2[0] * p2[0]));
						if (nPixel<nThreshold)nPixel = nThreshold;
						if (nPixel>255) nPixel = 255;
						p[0] = (byte) nPixel;
						++p;
						++p2;
					}
					p += nOffset;
					p2 += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			bTemp.UnlockBits(bmData2);
 
			return true;
		}
 
		public static bool EdgeDetectHorizontal(Bitmap b)
		{
			Bitmap bmTemp = (Bitmap)b.Clone();
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmData2 = bmTemp.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr Scan02 = bmData2.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * p2 = (byte *)(void *)Scan02;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				int nPixel = 0;
 
				p += stride;
				p2 += stride;
 
				for(int y=1;y<b.Height-1;++y)
				{
					p += 9;
					p2 += 9;
 
					for(int x=9; x < nWidth-9; ++x )
					{
						nPixel = ((p2 + stride - 9)[0] +
							(p2 + stride - 6)[0] +
							(p2 + stride - 3)[0] +
							(p2 + stride)[0] +
							(p2 + stride + 3)[0] +
							(p2 + stride + 6)[0] +
							(p2 + stride + 9)[0] -
							(p2 - stride - 9)[0] -
							(p2 - stride - 6)[0] -
							(p2 - stride - 3)[0] -
							(p2 - stride)[0] -
							(p2 - stride + 3)[0] -
							(p2 - stride + 6)[0] -
							(p2 - stride + 9)[0]);
 
						if (nPixel < 0) nPixel = 0;
						if (nPixel > 255) nPixel = 255;
 
						(p+stride)[0] = (byte) nPixel;
 
						++ p;
						++ p2;
					}
 
					p += 9 + nOffset;
					p2 += 9 + nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			bmTemp.UnlockBits(bmData2);
 
			return true;
		}
 
		public static bool EdgeDetectVertical(Bitmap b)
		{
			Bitmap bmTemp = (Bitmap)b.Clone();
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmData2 = bmTemp.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr Scan02 = bmData2.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * p2 = (byte *)(void *)Scan02;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				int nPixel = 0;
 
				int nStride2 = stride *2;
				int nStride3 = stride * 3;
 
				p += nStride3;
				p2 += nStride3;
 
				for(int y=3;y<b.Height-3;++y)
				{
					p += 3;
					p2 += 3;
 
					for(int x=3; x < nWidth-3; ++x )
					{
						nPixel = ((p2 + nStride3 + 3)[0] +
							(p2 + nStride2 + 3)[0] +
							(p2 + stride + 3)[0] +
							(p2 + 3)[0] +
							(p2 - stride + 3)[0] +
							(p2 - nStride2 + 3)[0] +
							(p2 - nStride3 + 3)[0] -
							(p2 + nStride3 - 3)[0] -
							(p2 + nStride2 - 3)[0] -
							(p2 + stride - 3)[0] -
							(p2 - 3)[0] -
							(p2 - stride - 3)[0] -
							(p2 - nStride2 - 3)[0] -
							(p2 - nStride3 - 3)[0]);
 
						if (nPixel < 0) nPixel = 0;
						if (nPixel > 255) nPixel = 255;
 
						p[0] = (byte) nPixel;
 
						++ p;
						++ p2;
					}
 
					p += 3 + nOffset;
					p2 += 3 + nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			bmTemp.UnlockBits(bmData2);
 
			return true;
		}
 
		public static bool EdgeDetectHomogenity(Bitmap b, byte nThreshold)
		{
			// This one works by working out the greatest difference between a pixel and it's eight neighbours.
			// The threshold allows softer edges to be forced down to black, use 0 to negate it's effect.
			Bitmap b2 = (Bitmap) b.Clone();
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmData2 = b2.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr Scan02 = bmData2.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * p2 = (byte *)(void *)Scan02;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				int nPixel = 0, nPixelMax = 0;
 
				p += stride;
				p2 += stride;
 
				for(int y=1;y<b.Height-1;++y)
				{
					p += 3;
					p2 += 3;
 
					for(int x=3; x < nWidth-3; ++x )
					{
						nPixelMax = Math.Abs(p2[0] - (p2+stride-3)[0]);
						nPixel = Math.Abs(p2[0] - (p2 + stride)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs(p2[0] - (p2 + stride + 3)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs(p2[0] - (p2 - stride)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs(p2[0] - (p2 + stride)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs(p2[0] - (p2 - stride - 3)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs(p2[0] - (p2 - stride)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs(p2[0] - (p2 - stride + 3)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						if (nPixelMax < nThreshold) nPixelMax = 0;
 
						p[0] = (byte) nPixelMax;
 
						++ p;
						++ p2;
					}
 
					p += 3 + nOffset;
					p2 += 3 + nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			b2.UnlockBits(bmData2);
 
			return true;
 
		}
		public static bool EdgeDetectDifference(Bitmap b, byte nThreshold)
		{
			// This one works by working out the greatest difference between a pixel and it's eight neighbours.
			// The threshold allows softer edges to be forced down to black, use 0 to negate it's effect.
			Bitmap b2 = (Bitmap) b.Clone();
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmData2 = b2.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr Scan02 = bmData2.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * p2 = (byte *)(void *)Scan02;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				int nPixel = 0, nPixelMax = 0;
 
				p += stride;
				p2 += stride;
 
				for(int y=1;y<b.Height-1;++y)
				{
					p += 3;
					p2 += 3;
 
					for(int x=3; x < nWidth-3; ++x )
					{
						nPixelMax = Math.Abs((p2 - stride + 3)[0] - (p2+stride-3)[0]);
						nPixel = Math.Abs((p2 + stride + 3)[0] - (p2 - stride - 3)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs((p2 - stride)[0] - (p2 + stride)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs((p2+3)[0] - (p2 - 3)[0]);
						if (nPixel>nPixelMax) nPixelMax = nPixel;
 
						if (nPixelMax < nThreshold) nPixelMax = 0;
 
						p[0] = (byte) nPixelMax;
 
						++ p;
						++ p2;
					}
 
					p += 3 + nOffset;
					p2 += 3 + nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			b2.UnlockBits(bmData2);
 
			return true;
 
		}
 
		public static bool EdgeEnhance(Bitmap b, byte nThreshold)
		{
			// This one works by working out the greatest difference between a nPixel and it's eight neighbours.
			// The threshold allows softer edges to be forced down to black, use 0 to negate it's effect.
			Bitmap b2 = (Bitmap) b.Clone();
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmData2 = b2.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int stride = bmData.Stride;
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr Scan02 = bmData2.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * p2 = (byte *)(void *)Scan02;
 
				int nOffset = stride - b.Width*3;
				int nWidth = b.Width * 3;
 
				int nPixel = 0, nPixelMax = 0;
 
				p += stride;
				p2 += stride;
 
				for (int y = 1; y < b.Height-1; ++y)
				{
					p += 3;
					p2 += 3;
 
					for (int x = 3; x < nWidth-3; ++x)
					{
						nPixelMax = Math.Abs((p2 - stride + 3)[0] - (p2 + stride - 3)[0]);
 
						nPixel = Math.Abs((p2 + stride + 3)[0] - (p2 - stride - 3)[0]);
 
						if (nPixel > nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs((p2 - stride)[0] - (p2 + stride)[0]);
 
						if (nPixel > nPixelMax) nPixelMax = nPixel;
 
						nPixel = Math.Abs((p2 + 3)[0] - (p2 - 3)[0]);
 
						if (nPixel > nPixelMax) nPixelMax = nPixel;
 
						if (nPixelMax > nThreshold && nPixelMax > p[0])
							p[0] = (byte) Math.Max(p[0], nPixelMax);
 
						++ p;
						++ p2;			
					}
 
					p += nOffset + 3;
					p2 += nOffset + 3;
				}
			}	
 
			b.UnlockBits(bmData);
			b2.UnlockBits(bmData2);
 
			return true;
		}
		public static Bitmap Resize(Bitmap b, int nWidth, int nHeight, bool bBilinear)
		{
			Bitmap bTemp = (Bitmap)b.Clone();
			b = new Bitmap(nWidth, nHeight, bTemp.PixelFormat);
 
			double nXFactor = (double)bTemp.Width/(double)nWidth;
			double nYFactor = (double)bTemp.Height/(double)nHeight;
 
			if (bBilinear)
			{
				double fraction_x, fraction_y, one_minus_x, one_minus_y;
				int ceil_x, ceil_y, floor_x, floor_y;
				Color c1 = new Color();
				Color c2 = new Color();
				Color c3 = new Color();
				Color c4 = new Color();
				byte red, green, blue;
 
				byte b1, b2;
 
				for (int x = 0; x < b.Width; ++x)
					for (int y = 0; y < b.Height; ++y)
					{
						// Setup
 
						floor_x = (int)Math.Floor(x * nXFactor);
						floor_y = (int)Math.Floor(y * nYFactor);
						ceil_x = floor_x + 1;
						if (ceil_x >= bTemp.Width) ceil_x = floor_x;
						ceil_y = floor_y + 1;
						if (ceil_y >= bTemp.Height) ceil_y = floor_y;
						fraction_x = x * nXFactor - floor_x;
						fraction_y = y * nYFactor - floor_y;
						one_minus_x = 1.0 - fraction_x;
						one_minus_y = 1.0 - fraction_y;
 
						c1 = bTemp.GetPixel(floor_x, floor_y);
						c2 = bTemp.GetPixel(ceil_x, floor_y);
						c3 = bTemp.GetPixel(floor_x, ceil_y);
						c4 = bTemp.GetPixel(ceil_x, ceil_y);
 
						// Blue
						b1 = (byte)(one_minus_x * c1.B + fraction_x * c2.B);
 
						b2 = (byte)(one_minus_x * c3.B + fraction_x * c4.B);
 
						blue = (byte)(one_minus_y * (double)(b1) + fraction_y * (double)(b2));
 
						// Green
						b1 = (byte)(one_minus_x * c1.G + fraction_x * c2.G);
 
						b2 = (byte)(one_minus_x * c3.G + fraction_x * c4.G);
 
						green = (byte)(one_minus_y * (double)(b1) + fraction_y * (double)(b2));
 
						// Red
						b1 = (byte)(one_minus_x * c1.R + fraction_x * c2.R);
 
						b2 = (byte)(one_minus_x * c3.R + fraction_x * c4.R);
 
						red = (byte)(one_minus_y * (double)(b1) + fraction_y * (double)(b2));
 
						b.SetPixel(x,y, System.Drawing.Color.FromArgb(255, red, green, blue));
					}
			}
			else
			{
				for (int x = 0; x < b.Width; ++x)
					for (int y = 0; y < b.Height; ++y)
						b.SetPixel(x, y, bTemp.GetPixel((int)(Math.Floor(x * nXFactor)),(int)(Math.Floor(y * nYFactor))));
			}
 
			return b;
		}
 
		public static bool OffsetFilterAbs(Bitmap b, Point[,] offset )
		{
			Bitmap bSrc = (Bitmap)b.Clone(); 
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmSrc = bSrc.LockBits(new Rectangle(0, 0, bSrc.Width, bSrc.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int scanline = bmData.Stride;
 
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr SrcScan0 = bmSrc.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * pSrc = (byte *)(void *)SrcScan0;
 
				int nOffset = bmData.Stride - b.Width*3;
				int nWidth = b.Width;
				int nHeight = b.Height;
 
				int xOffset, yOffset;
 
				for(int y=0;y < nHeight;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{	
						xOffset = offset[x,y].X;
						yOffset = offset[x,y].Y;
 
						if (yOffset >= 0 && yOffset < nHeight && xOffset >= 0 && xOffset < nWidth)
						{
							p[0] = pSrc[(yOffset * scanline) + (xOffset * 3)];
							p[1] = pSrc[(yOffset * scanline) + (xOffset * 3) + 1];
							p[2] = pSrc[(yOffset * scanline) + (xOffset * 3) + 2];
						}
 
						p += 3;
					}
					p += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			bSrc.UnlockBits(bmSrc);
 
			return true;
		}
 
		public static bool OffsetFilter(Bitmap b, Point[,] offset )
		{
			Bitmap bSrc = (Bitmap)b.Clone(); 
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmSrc = bSrc.LockBits(new Rectangle(0, 0, bSrc.Width, bSrc.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int scanline = bmData.Stride;
 
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr SrcScan0 = bmSrc.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * pSrc = (byte *)(void *)SrcScan0;
 
				int nOffset = bmData.Stride - b.Width*3;
				int nWidth = b.Width;
				int nHeight = b.Height;
 
				int xOffset, yOffset;
 
				for(int y=0;y < nHeight;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{	
						xOffset = offset[x,y].X;
						yOffset = offset[x,y].Y;
 
						if (y+yOffset >= 0 && y+yOffset < nHeight && x+xOffset >= 0 && x+xOffset < nWidth)
						{
							p[0] = pSrc[((y+yOffset) * scanline) + ((x+xOffset) * 3)];
							p[1] = pSrc[((y+yOffset) * scanline) + ((x+xOffset) * 3) + 1];
							p[2] = pSrc[((y+yOffset) * scanline) + ((x+xOffset) * 3) + 2];
						}
 
						p += 3;
					}
					p += nOffset;
				}
			}
 
			b.UnlockBits(bmData);
			bSrc.UnlockBits(bmSrc);
 
			return true;
		}
 
		public static bool OffsetFilterAntiAlias(Bitmap b, FloatPoint[,] fp)
		{
			Bitmap bSrc = (Bitmap)b.Clone(); 
 
			// !! Don't forget GDI+ uses BGR format and nor RGB !!!
			BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
			BitmapData bmSrc = bSrc.LockBits(new Rectangle(0, 0, bSrc.Width, bSrc.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
 
			int scanline = bmData.Stride;
 
			System.IntPtr Scan0 = bmData.Scan0;
			System.IntPtr SrcScan0 = bmSrc.Scan0;
 
			unsafe
			{
				byte * p = (byte *)(void *)Scan0;
				byte * pSrc = (byte *)(void *)SrcScan0;
 
				int nOffset = bmData.Stride - b.Width*3;
				int nWidth = b.Width;
				int nHeight = b.Height;
 
				double xOffset, yOffset;
 
				double fraction_x, fraction_y, one_minus_x, one_minus_y;
				int ceil_x, ceil_y, floor_x, floor_y;
				Byte p1, p2;
 
				for(int y=0;y < nHeight;++y)
				{
					for(int x=0; x < nWidth; ++x )
					{	
						xOffset = fp[x,y].X;
						yOffset = fp[x,y].Y;
 
						// Setup
 
						floor_x = (int)Math.Floor(xOffset);
						floor_y = (int)Math.Floor(yOffset);
						ceil_x = floor_x + 1;
						ceil_y = floor_y + 1;
						fraction_x = xOffset - floor_x;
						fraction_y = yOffset - floor_y;
						one_minus_x = 1.0 - fraction_x;
						one_minus_y = 1.0 - fraction_y;
 
						if (floor_y >= 0 && ceil_y < nHeight && floor_x >= 0 && ceil_x < nWidth)
						{
							// Blue
 
							p1 = (Byte)(one_minus_x * (double)(pSrc[floor_y * scanline + floor_x * 3]) +
								fraction_x * (double)(pSrc[floor_y * scanline + ceil_x * 3]));
 
							p2 = (Byte)(one_minus_x * (double)(pSrc[ceil_y * scanline + floor_x * 3]) +
								fraction_x * (double)(pSrc[ceil_y * scanline + 3 * ceil_x]));
 
							p[x * 3 + y*scanline] = (Byte)(one_minus_y * (double)(p1) + fraction_y * (double)(p2));
 
							// Green
 
							p1 = (Byte)(one_minus_x * (double)(pSrc[floor_y * scanline + floor_x * 3 + 1]) +
								fraction_x * (double)(pSrc[floor_y * scanline + ceil_x * 3 + 1]));
 
							p2 = (Byte)(one_minus_x * (double)(pSrc[ceil_y * scanline + floor_x * 3 + 1]) +
								fraction_x * (double)(pSrc[ceil_y * scanline + 3 * ceil_x + 1]));
 
							p[x * 3 + y*scanline + 1] = (Byte)(one_minus_y * (double)(p1) + fraction_y * (double)(p2));
 
							// Red
 
							p1 = (Byte)(one_minus_x * (double)(pSrc[floor_y * scanline + floor_x * 3 + 2]) +
								fraction_x * (double)(pSrc[floor_y * scanline + ceil_x * 3 + 2]));
 
							p2 = (Byte)(one_minus_x * (double)(pSrc[ceil_y * scanline + floor_x * 3 + 2]) +
								fraction_x * (double)(pSrc[ceil_y * scanline + 3 * ceil_x + 2]));
 
							p[x * 3 + y*scanline + 2] = (Byte)(one_minus_y * (double)(p1) + fraction_y * (double)(p2));
						}
					}
				}
			}
 
			b.UnlockBits(bmData);
			bSrc.UnlockBits(bmSrc);
 
			return true;
		}
 
		public static bool Flip(Bitmap b, bool bHorz, bool bVert)
		{
			Point [,] ptFlip = new Point[b.Width,b.Height]; 
 
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					ptFlip[x, y].X = (bHorz) ? nWidth - (x+1) : x;
					ptFlip[x,y].Y = (bVert) ? nHeight - (y + 1) : y;
				}
 
			OffsetFilterAbs(b, ptFlip);		
 
			return true;
		}
 
		public static bool RandomJitter(Bitmap b, short nDegree)
		{
			Point [,] ptRandJitter = new Point[b.Width,b.Height]; 
 
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			int newX, newY;
 
			short nHalf = (short)Math.Floor((double)nDegree/2);
			Random rnd = new Random();
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					newX = rnd.Next(nDegree) - nHalf;
 
					if (x + newX > 0 && x + newX < nWidth)
						ptRandJitter[x, y].X = newX;
					else
						ptRandJitter[x, y].X = 0;
 
					newY = rnd.Next(nDegree) - nHalf;
 
					if (y + newY > 0 && y + newY < nWidth)
						ptRandJitter[x, y].Y = newY;
					else
						ptRandJitter[x, y].Y = 0;
				}
 
			OffsetFilter(b, ptRandJitter);		
 
			return true;
		}
		public static bool Swirl(Bitmap b, double fDegree, bool bSmoothing /* default fDegree to .05 */)
		{
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			FloatPoint [,] fp = new FloatPoint[nWidth, nHeight];
			Point [,] pt = new Point[nWidth, nHeight];
 
			Point mid = new Point();
			mid.X = nWidth/2;
			mid.Y = nHeight/2;
 
			double theta, radius;
			double newX, newY;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					int trueX = x - mid.X;
					int trueY = y - mid.Y;
					theta = Math.Atan2((trueY),(trueX));
 
					radius = Math.Sqrt(trueX*trueX + trueY*trueY);
 
					newX = mid.X + (radius * Math.Cos(theta + fDegree * radius));
					if (newX > 0 && newX < nWidth)
					{
						fp[x, y].X = newX;
						pt[x, y].X = (int)newX;
					}
					else
						fp[x, y].X = pt[x, y].X = x;
 
					newY = mid.Y + (radius * Math.Sin(theta + fDegree * radius));
					if (newY > 0 && newY < nHeight)
					{
						fp[x, y].Y = newY;
						pt[x, y].Y = (int)newY;
					}
					else
						fp[x, y].Y = pt[x, y].Y = y;
				}
 
			if(bSmoothing)
				OffsetFilterAntiAlias(b, fp);
			else
				OffsetFilterAbs(b, pt);		
 
			return true;
		}
 
		public static bool Sphere(Bitmap b, bool bSmoothing, int displacement, int expand)
		{
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			FloatPoint [,] fp = new FloatPoint[nWidth, nHeight];
			Point [,] pt = new Point[nWidth, nHeight];
 
            Point mid = new Point();
            mid.X = nWidth / 2;
            mid.Y = nHeight / 2;
 
			double theta, radius;
			double newX, newY;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					int trueX = x - mid.X;
					int trueY = y - mid.Y;
                    theta = Math.Atan2((trueY), (trueX));
 
					radius = Math.Sqrt(trueX*trueX + trueY*trueY);
 
					double newRadius = radius * radius/(Math.Max(mid.X, mid.Y));
 
					newX = mid.X + (newRadius * Math.Cos(theta)) + displacement;
 
					if (newX > 0 && newX < nWidth)
					{
						fp[x, y].X = newX;
						pt[x, y].X = (int) newX;
					}
					else
					{
						fp[x, y].X = fp[x,y].Y = 0.0;
						pt[x, y].X = pt[x,y].Y = 0;
					}
 
                    newY = mid.Y + (newRadius * Math.Sin(theta)) + expand;
 
					if (newY > 0 && newY < nHeight && newX > 0 && newX < nWidth)
					{
						fp[x, y].Y = newY;
						pt[x, y].Y = (int) newY;
					}
					else
					{
						fp[x, y].X = fp[x,y].Y = 0.0;
						pt[x, y].X = pt[x,y].Y = 0;
					}
				}
 
			if(bSmoothing)
				OffsetFilterAbs(b, pt);
			else
				OffsetFilterAntiAlias(b, fp);
 
			return true;
		}
 
		public static bool TimeWarp(Bitmap b, Byte factor, bool bSmoothing)
		{
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			FloatPoint [,] fp = new FloatPoint[nWidth, nHeight];
			Point [,] pt = new Point[nWidth, nHeight];
 
			Point mid = new Point();
			mid.X = nWidth/2;
			mid.Y = nHeight/2;
 
			double theta, radius;
			double newX, newY;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					int trueX = x - mid.X;
					int trueY = y - mid.Y;
					theta = Math.Atan2((trueY),(trueX));
 
					radius = Math.Sqrt(trueX*trueX + trueY*trueY);
 
					double newRadius = Math.Sqrt(radius) * factor;
 
					newX = mid.X + (newRadius * Math.Cos(theta));
					if (newX > 0 && newX < nWidth)
					{
						fp[x, y].X = newX;
						pt[x, y].X = (int) newX;
					}
					else
					{
						fp[x, y].X = 0.0;
						pt[x, y].X = 0;
					}
 
					newY = mid.Y + (newRadius * Math.Sin(theta));
					if (newY > 0 && newY < nHeight)
					{
						fp[x, y].Y = newY;
						pt[x, y].Y = (int) newY;
					}
					else
					{
						fp[x, y].Y = 0.0;
						pt[x, y].Y = 0;
					}
				}
 
			if(bSmoothing)
				OffsetFilterAbs(b, pt);
			else
				OffsetFilterAntiAlias(b, fp);
 
			return true;
		}
 
		public static bool Moire(Bitmap b, double fDegree)
		{
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			Point [,] pt = new Point[nWidth, nHeight];
 
			Point mid = new Point();
			mid.X = nWidth/2;
			mid.Y = nHeight/2;
 
			double theta, radius;
			int newX, newY;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					int trueX = x - mid.X;
					int trueY = y - mid.Y;
					theta = Math.Atan2((trueX),(trueY));
 
					radius = Math.Sqrt(trueX*trueX + trueY*trueY);
 
					newX = (int)(radius * Math.Sin(theta + fDegree * radius));
					if (newX > 0 && newX < nWidth)
					{
						pt[x, y].X = (int) newX;
					}
					else
					{
						pt[x, y].X = 0;
					}
 
					newY = (int)(radius * Math.Sin(theta + fDegree * radius));
					if (newY > 0 && newY < nHeight)
					{
						pt[x, y].Y = (int) newY;
					}
					else
					{
						pt[x, y].Y = 0;
					}
				}
 
			OffsetFilterAbs(b, pt);
 
			return true;
		}
 
		public static bool Water(Bitmap b, short nWave, bool bSmoothing)
		{
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			FloatPoint [,] fp = new FloatPoint[nWidth, nHeight];
			Point [,] pt = new Point[nWidth, nHeight];
 
			Point mid = new Point();
			mid.X = nWidth/2;
			mid.Y = nHeight/2;
 
			double newX, newY;
			double xo, yo;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					xo = ((double)nWave * Math.Sin(2.0 * 3.1415 * (float)y / 128.0));
					yo = ((double)nWave * Math.Cos(2.0 * 3.1415 * (float)x / 128.0));
 
					newX = (x + xo);
					newY = (y + yo);
 
					if (newX > 0 && newX < nWidth)
					{
						fp[x, y].X = newX;
						pt[x, y].X = (int) newX;
					}
					else
					{
						fp[x, y].X = 0.0;
						pt[x, y].X = 0;
					}
 
 
					if (newY > 0 && newY < nHeight)
					{
						fp[x, y].Y = newY;
						pt[x, y].Y = (int) newY;
					}
					else
					{
						fp[x, y].Y = 0.0;
						pt[x, y].Y = 0;
					}
				}
 
			if(bSmoothing)
				OffsetFilterAbs(b, pt);
			else
				OffsetFilterAntiAlias(b, fp);
 
			return true;
		}
 
		public static bool Pixelate(Bitmap b, short pixel, bool bGrid)
		{
			int nWidth = b.Width;
			int nHeight = b.Height;
 
			Point [,] pt = new Point[nWidth, nHeight];
 
			int newX, newY;
 
			for (int x = 0; x < nWidth; ++x)
				for (int y = 0; y < nHeight; ++y)
				{
					newX = pixel - x%pixel;
 
					if (bGrid && newX == pixel)
						pt[x, y].X = -x;
					else if (x + newX > 0 && x +newX < nWidth)
						pt[x, y].X = newX;
					else
						pt[x, y].X = 0;
 
					newY = pixel - y%pixel;
 
					if (bGrid && newY == pixel)
						pt[x, y].Y = -y;
					else if (y + newY > 0 && y + newY < nHeight)
						pt[x, y].Y = newY;
					else
						pt[x, y].Y = 0;
				}
 
			OffsetFilter(b, pt);
 
			return true;
		}
 
        public static bool sepia(Bitmap b, int red, int green, int blue)
        {
            BitmapData bmpData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
            int remain = bmpData.Stride - bmpData.Width * 3;
            unsafe
            {
                byte* ptr = (byte*)bmpData.Scan0;
                for (int i = 0; i < bmpData.Height; i++)
                {
                   for (int j = 0; j < bmpData.Width; j++)
                    {
                        byte t = (byte)(0.299 * ptr[2] + 0.587 * ptr[1] + 0.114 * ptr[0]);
                        ptr[2] = ((byte)((t > (206+red)) ? 255 : t + 49+red));
                        ptr[1] = ((byte)((t < (14+green)) ? 0 : t - (14+green)));
                        ptr[0] = ((byte)((t < (56+blue)) ? 0 : t - (56+blue)));
                        ptr += 3;
                    } /*
                    for (int j = 0; j < bmpData.Width; j++)
                    {
                        byte t = (byte)(0.299 * ptr[2] + 0.587 * ptr[1] + 0.114 * ptr[0]);
                        ptr[2] = ((byte)((t > red) ? 255 : t + red));
                        ptr[1] = ((byte)((t > green) ? 255 : t + green));
                        ptr[0] = ((byte)((t > blue) ? 255 : t + blue));
                        ptr += 3;
                    }*/
                    ptr += remain;
                }
            }
            b.UnlockBits(bmpData);
            return true;
        }
 
	}
}
Retourner au début du code
Structure et Fichiers du projet

Afficher/masquer...
Répertoires contenus dans /var/www/bin/sniplets/bibliobrol/photobrol/model/filters/
Icône	Nom	Taille	Modification
Pas de sous-répertoires.
Icône	Nom	Taille	Modification
\| _	Répertoire parent	0 octets	1734975270 23/12/2024 18:34:30
Fichiers contenus dans /var/www/bin/sniplets/bibliobrol/photobrol/model/filters/
Icône	Nom	Taille	Modification	Action
Icône	Nom	Taille	Modification	Action
\|.cs	BitmapFilter.cs	41.18 Ko	31/10/2018 18:32:51	-refusé-
\|.cs	ConvMatrix.cs	592 octets	31/10/2018 18:32:51	-refusé-
\|.cs	FloatPoint.cs	219 octets	31/10/2018 18:32:51	-refusé-
Utilisation de l'explorateur de code
Navigation :
- Un clic sur une icône de répertoire ouvre ce répertoire pour en afficher les fichiers.
- Lorsque le répertoire en cours ne contient pas de sous-répertoires il est possible de remonter vers le répertoire parent.
- La structure de répertoires en treetable (tableau en forme d'arborescence) n'est plus possibledans cette version.
- Un clic sur une icône de fichier ouvre ce fichier pour en afficher le code avec la coloration syntaxique adaptée en fonction du langage principal utilisé dans le fichier.
Affichage :
- Il est possible de trier les répertoires ou les fichiers selon certains critères (nom, taille, date).
Actions :
- Les actions possible sur les fichiers dépendent de vos droits d'utilisateur sur le site. Veuillez activer le mode utilisateur pour activer les actions.
Deutsche Übersetzung
Sie haben gebeten, diese Seite auf Deutsch zu besuchen. Momentan ist nur die Oberfläche übersetzt, aber noch nicht der gesamte Inhalt.

Wenn Sie mir bei Übersetzungen helfen wollen, ist Ihr Beitrag willkommen. Alles, was Sie tun müssen, ist, sich auf der Website zu registrieren und mir eine Nachricht zu schicken, in der Sie gebeten werden, Sie der Gruppe der Übersetzer hinzuzufügen, die Ihnen die Möglichkeit gibt, die gewünschten Seiten zu übersetzen. Ein Link am Ende jeder übersetzten Seite zeigt an, dass Sie der Übersetzer sind und einen Link zu Ihrem Profil haben.

Vielen Dank im Voraus.
Dokument erstellt 30/10/2009, zuletzt geändert 26/10/2018
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/cs-photobrol-source-rf-model/filters//BitmapFilter.cs.html
Die Infobro ist eine persönliche Seite, deren Inhalt in meiner alleinigen Verantwortung liegt. Der Text ist unter der CreativeCommons-Lizenz (BY-NC-SA) verfügbar. Weitere Informationen auf die Nutzungsbedingungen und dem Autor.