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Reference.org
Co-occurrence matrix
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<p>A co-occurrence matrix or co-occurrence distribution (also referred to as : <i>gray-level co-occurrence matrices</i> GLCMs) is a <a href="/facts/Matrix_(mathematics)/qa8FI4ko">matrix</a> that is defined over an <a href="/facts/Digital_image/3TNT47Mv">image</a> to be the distribution of co-occurring pixel values (grayscale values, or colors) at a given offset. It is used as an approach to texture analysis with various applications especially in medical image analysis. </p>