Synthetic COCO (S-COCO) is a synthetically created dataset for homography estimation learning. It was introduced by DeTone et al., where the source and target images are generated by duplicating the same COCO image. The source patch $I_S$ is generated by randomly cropping a source candidate at position $p$ with a size of 128 ×128 pixels. Then the patch’s corners are randomly perturbed vertically and horizontally by values within the range [−$\rho$,$\rho$] and the four correspondences define a homography $H_{ST}$ . The inverse of this homography $H_{TS} = (H_{ST} )^{-1}$ is applied to the target candidate and from the resulted warped image a target patch $I_T$ is cropped at the same location p. Both $I_S$ and $I_T$ are the input data with the homography $H_{ST}$ as ground truth.