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depth-based correspondence
Depth-based correspondence is a method in computer vision and image processing that establishes spatial and pixel-to-pixel relationships across different camera viewpoints by utilizing estimated or measured scene depth alongside camera projection geometry. By unprojecting pixels from a source image into three-dimensional coordinates based on their depth values and subsequently reprojecting them into a target viewpoint, this technique determines exactly where visual content from one perspective should map onto another. It is widely used in applications such as novel view synthesis, 3D reconstruction, and geometric image warping, providing explicit geometric constraints that maintain spatial consistency, guide generative models, and preserve visual details across viewpoint transformations.
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