Corrupted images in dataset

[Kaiwen-Zhu]

Thanks for your excellent work! However, I found some corrupted images in the dataset. In 10kgray, when reading val_images/image/COCO_val2014_000000087481-Kaporal_Jeans_Logo-185.png, train_images/image/COCO_val2014_000000260525-Breyers_Logo-163.png, train_images/image/COCO_val2014_000000510651-University_Of_Oxford_Logo_Text-179.png using imageio.v2.imread, an error image file is truncated occurs. In fact the latter two images do not contain the watermark and are thus not usable.

The three truncated images.