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Kernel (image processing)
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<p>In <a href="/facts/Image_processing/zenalNCf">image processing</a>, a kernel, convolution matrix, or mask is a small <a href="/facts/Matrix_(mathematics)/qa8FI4ko">matrix</a> used for blurring, sharpening, embossing, <a href="/facts/Edge_detection/9VplpIcS">edge detection</a>, and more. This is accomplished by doing a <a href="/facts/Convolution/PVPrdz9J">convolution</a> between the kernel and an <a href="/facts/Bitmap_image/Fr80ySnT">image</a>. Or more simply, when each pixel in the output image is a function of the nearby pixels (including itself) in the input image, the kernel is that function. </p>