PDS-COCO (Photometrically Distorted Synthetic COCO)

Introduced by Koguciuk et al. in Perceptual Loss for Robust Unsupervised Homography Estimation

Photometrically Distorted Synthetic COCO (PDS-COCO) dataset is a synthetically created dataset for homography estimation learning. The idea is exactly the same as in the Synthetic COCO (S-COCO) dataset with SSD-like image distortion added at the beginning of the whole procedure: the first step involves adjusting the brightness of the image using randomly picked value $\delta_b \in \mathcal{U}(-32, 32)$. Next, contrast, saturation and hue noise is applied with the following values: $\delta_c \in \mathcal{U}(0.5, 1.5)$, $\delta_s \in \mathcal{U}(0.5, 1.5)$ and $\delta_h \in \mathcal{U}(-18, 18)$. Finally, the color channels of the image are randomly swapped with a probability of $0.5$. Such a photometric distortion procedure is applied to the original image independently to create source and target candidates.

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