如何比较2个HDC的取舍误差为1％

问题描述

大家好，

我很难在另一个HDC中搜索一个HDC.如果像素都相同，我就可以做到.
如何设置比较值，让我说1％的错误?
这是每个像素的比较逻辑部分:

Hello all,

I am having a hard time, searching one HDC within another HDC. I have been able to do it if the pixels are all the same.
How do I set the comparison to give me an error of lets say 1%?
Here is the the portion of the compare logic for each pixel:

for(int y = 0; y < Rect_To_Compare.bottom; ++y) {
    for(int x = 0; x < Rect_To_Compare.right; ++x) {
        COLORREF Color = ::GetPixel(DlgDC, (x + Rect_To_Compare.left), (y + Rect_To_Compare.top) );
        COLORREF ColorToCompare = ::GetPixel(BitmapDC,x,y);
        if(Color != ColorToCompare) {
            result = false;
        }
    }
}

任何帮助将不胜感激.

Any help would be greatly appreciated.

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