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Gradient-domain image processing
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<p>Gradient domain image processing, also called Poisson image editing, is a type of <a href="/facts/Digital_image_processing/zenalNCf">digital image processing</a> that operates directly on the differences between neighboring pixels, rather than on the pixel values. Mathematically, an <a href="/facts/Image_gradient/ImvsRE52">image gradient</a> represents the <a href="/facts/Derivative/7Ito70Dh">derivative</a> of an image, so the goal of gradient domain processing is to construct a new image by <a href="/facts/Integral/V7lyV997">integrating</a> the gradient, which requires solving <a href="/facts/Poisson%27s_equation/Pr8zkCXB">Poisson's equation</a>. </p>