效果图

代码

private unsafe void BlendImages1(Bitmap img1, Bitmap img2)
{// 确定两个图像的重叠区域Rectangle rect = new Rectangle(0, 0,Math.Min(img1.Width, img2.Width),Math.Min(img1.Height, img2.Height));// 创建输出图像，尺寸为重叠区域大小Bitmap blendedImage = new Bitmap(rect.Width, rect.Height, PixelFormat.Format32bppArgb);// Lock the bits of each image and get the BitmapData.BitmapData data1 = img1.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);BitmapData data2 = img2.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);BitmapData dataBlended = blendedImage.LockBits(rect, ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);int bytesPerPixel = 4; // For Format32bppArgbint stride1 = data1.Stride;int stride2 = data2.Stride;int strideBlended = dataBlended.Stride;byte* ptr1 = (byte*)data1.Scan0.ToPointer();byte* ptr2 = (byte*)data2.Scan0.ToPointer();byte* ptrBlended = (byte*)dataBlended.Scan0.ToPointer();for (int y = 0; y < rect.Height; ++y){byte* rowPtr1 = ptr1 + y * stride1;byte* rowPtr2 = ptr2 + y * stride2;byte* rowPtrBlended = ptrBlended + y * strideBlended;for (int x = 0; x < rect.Width; ++x){int pixelOffset = x * bytesPerPixel;if (pixelOffset + bytesPerPixel <= Math.Abs(stride1) &&pixelOffset + bytesPerPixel <= Math.Abs(stride2) &&pixelOffset + bytesPerPixel <= Math.Abs(strideBlended)){rowPtrBlended[pixelOffset] = (byte)(255 - ((255 - rowPtr1[pixelOffset]) * (255 - rowPtr2[pixelOffset]) >> 8)); // BrowPtrBlended[pixelOffset + 1] = (byte)(255 - ((255 - rowPtr1[pixelOffset + 1]) * (255 - rowPtr2[pixelOffset + 1]) >> 8)); // GrowPtrBlended[pixelOffset + 2] = (byte)(255 - ((255 - rowPtr1[pixelOffset + 2]) * (255 - rowPtr2[pixelOffset + 2]) >> 8)); // RrowPtrBlended[pixelOffset + 3] = (byte)255; // A}}}// Unlock the bits of each image after processing.img1.UnlockBits(data1);img2.UnlockBits(data2);blendedImage.UnlockBits(dataBlended);// Display the blended image.pictureBoxResult.Image = blendedImage;
}

素材