PNG does not support bilevel (1 bit per pixel) images, but you are converting to a bilevel image before saving.
Try ConvertImage.save("test.png","png"); instead of the last 2 lines ?
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Re: How to make a mask with QImage?
PNG does not support bilevel (1 bit per pixel) images, but you are converting to a bilevel image before saving.
Try ConvertImage.save("test.png","png"); instead of the last 2 lines ?
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