Develop image contrast,sharpen,warmth,crop,undo,redo functionality in asp.net c#

Question

I want to develop image contrast,sharpen,warmth,crop,undo,redo functionality in my web application. Please tell me how can I develop this functionality ? I dont want to use .GetPixel() and .SetPixel() because it is very slow metho. so please tell me any other way to develop these functionalities.

Thanks in Advance.

What have you tried? A simple Google search will return thousands of results.. over 50% of which are here on SO.. — Simon Whitehead, Aug 23 '12 at 11:58

score 0 · Answer 1 · answered Aug 23 '12 at 12:11

If you need faster access to the pixel data on an image, use Image.LockBits. Note that any method containing this code must be marked unsafe.

BitmapData bitmapData = image.LockBits(new Rectangle(0, 0, image.Width, image.Height), ImageLockMode.ReadWrite, PixelFormat.Format32bppRgb);
int* bitmapPtr = (int*)bitmapData.Scan0.ToPointer();

for (int pixelCount = 0; pixelCount <= image.Width * image.Height; pixelCount++)
{
    bitmapPtr[pixelCount] = ...;
    // etc
}

image.UnlockBits(bitmapData);

Develop image contrast,sharpen,warmth,crop,undo,redo functionality in asp.net c#

1 Answers1