@ironbar How are you viewing these? That isn’t at all what the file looks like when I download 0.tar fresh and open up images/00a2e221a62f5c98c116f977ee4a447d.png.
Can you make sure your files haven’t been changed from the ones you downloaded? Here’s what I see when I hash that particular image file:
Ah, I didn’t realize from the initial message that your screencap was a close zoom.
To answer your question, these artifacts are present in the raw source images and were not converted from .jpg, but I can reach out to the subject matter experts to see if they have anything to add.
Hi @ironbar - the SME at NASA already got back to me so I can provide a quick update. Several of the backgrounds used to generate these images may have residual artifacts, but the vast majority should not.
Generally speaking, you can ignore this, as there is no benefit to overfitting the training data, and different (but broadly similar) subsets of background images were used for the private test data.