This might help. Their academic paper is basically a description of how they made the dataset (and why) and includes a great example of the steps they went thro

This might help. Their academic paper is basically a description of how they made the dataset (and why) and includes a great example of the steps they went through to convert the images. https://arxiv.org/pdf/1708.07747.pdf https://arxiv.org/pdf/1708.07747.pdf