The Image Shadow Triplets dataset (ISTD) is a dataset for shadow understanding that contains 1870 image triplets of shadow image, shadow mask, and shadow-free image.
Source: ST-CGAN: "Stacked Conditional Generative Adversarial Networks for Jointly Learning Shadow Detection and Shadow Removal" Image Source: Stacked Conditional Generative Adversarial Networks for Jointly Learning Shadow Detection and Shadow Removal