about inputImage, groundTruth, mask

[XiaoYangon]

Thanks for your excellent work! I have some question.
In the dataloader.py ：
mask = 1 - mask
inputImage = groundTruth * mask
here，Dose zeros denotes the area to be inpainted and ones is the values remained in mask?
so zeros denotes the area to be inpainted in InputImage.
second question:
for a large hole, the result is a little poor, such as severe artifacts. Are there some ways to solve it?
looking forward to your reply.