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我试图把这种代码使用Marshal.copy
到VB.NET,但我不能让它工作对比算法C#指针marshal.copy
for (int y = 0; y < bitmapdata.Height; y++)
{
byte* destPixels = (byte*)bitmapdata.Scan0 + (y * bitmapdata.Stride);
for (int x = 0; x < bitmapdata.Width; x++)
{
destPixels[x * PixelSize] = contrast_lookup[destPixels[x * PixelSize]]; // B
destPixels[x * PixelSize + 1] = contrast_lookup[destPixels[x * PixelSize + 1]]; // G
destPixels[x * PixelSize + 2] = contrast_lookup[destPixels[x * PixelSize + 2]]; // R
//destPixels[x * PixelSize + 3] = contrast_lookup[destPixels[x * PixelSize + 3]]; //A
}
}
我的问题是这一行:
byte* destPixels = (byte*)bitmapdata.Scan0 + (y * bitmapdata.Stride);
类似的问题,http://stackoverflow.com/questions/13174323/contrast-of-an-image-in-vb2005/ – Kratz 2012-11-03 23:28:58