saliency 图像显著性检测最常用的数据集，有stimulus和pixel-wise groundtruth，共15k张(Saliency image saliency detection of the most commonly used data sets, there are stimulus and pixel-wise groundtruth, a total of 15K)

显著性对象监测数据集，gt为ground_truth_mask(a dataset for saliency detction which has its gt named ground_truth_mask)