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信息: <blockquote data-quote="defunktlemon" data-source="post: 4323" data-attributes="member: 8188">I have the information about the overrun problem I found on the site I'm using for this study.Ref: <a href="http://homepages.inf.ed.ac.uk/rbf/HIPR2/pixadd.htm">Image Arithmetic - Pixel Addition</a>If the image format being used only supports, say <a href="http://homepages.inf.ed.ac.uk/rbf/HIPR2/gryimage.htm">8-bit integer pixel values</a>, then it is very easy for the result of the addition to be greater than the maximum allowed pixel value. The effect of this depends upon the particular implementation. The overflowing pixel values might just be set to the maximum allowed value, an effect known as <a href="http://homepages.inf.ed.ac.uk/rbf/HIPR2/wrap.htm">saturation</a>. Alternatively the pixel values might wrap around from zero again. If the image format supports pixel values with a much larger range, e.g. 32-bit integers or floating point numbers, then this problem does not occur so much.I think there may be two ways to go about this, one using loops and get / set, and the other using LockBits.</blockquote>

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