【转】 C#图片处理经典算法（一） 2010-03-23 20:42 原始图片: ISINBAEVA ~~~~~~~~ 一. 底片效果 原理: GetPixel 方法获得每一点像素的值, 然后再使用 SetPixel 方法将取反后的颜色值设置到对应的点. 效果图: 代码实现: private void button1_Click(object sender, EventArgs e) { //以底片效果显示图像 try { int Height = this.pictureBox1.Image.Height; int Width = this.pictureBox1.Image.Width; Bitmap newbitmap = new Bitmap(Width, Height); Bitmap oldbitmap = (Bitmap)this.pictureBox1.Image; Color pixel; for (int x = 1; x < Width; x++) { for (int y = 1; y < Height; y++) { int r, g, b; pixel = oldbitmap.GetPixel(x, y); r = 255 - pixel.R; g = 255 - pixel.G; b = 255 - pixel.B; newbitmap.SetPixel(x, y, Color.FromArgb(r, g, b)); } } this.pictureBox1.Image = newbitmap; } catch (Exception ex) { MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information); } } 二. 浮雕效果 原理: 对图像像素点的像素值分别与相邻像素点的像素值相减后加上 128, 然后将其作为新的像素点的值. 效果图: 代码实现: private void button1_Click(object sender, EventArgs e) { //以浮雕效果显示图像 try { int Height = this.pictureBox1.Image.Height; int Width = this.pictureBox1.Image.Width; Bitmap newBitmap = new Bitmap(Width, Height); Bitmap oldBitmap = (Bitmap)this.pictureBox1.Image; Color pixel1, pixel2; for (int x = 0; x < Width - 1; x++) { for (int y = 0; y < Height - 1; y++) { int r = 0, g = 0, b = 0; pixel1 = oldBitmap.GetPixel(x, y); pixel2 = oldBitmap.GetPixel(x + 1, y + 1); r = Math.Abs(pixel1.R - pixel2.R + 128); g = Math.Abs(pixel1.G - pixel2.G + 128); b = Math.Abs(pixel1.B - pixel2.B + 128); if (r > 255) r = 255; if (r < 0) r = 0; if (g > 255) g = 255; if (g < 0) g = 0; if (b > 255) b = 255; if (b < 0) b = 0; newBitmap.SetPixel(x, y, Color....
