Region artifact cropper

Whole-image inspection rewards the overall composition, which is the part a generator is best at. The failures cluster where the model had the least training signal and the fewest constraints: fingers against a dark background, an earring that becomes an earlobe, lettering on a shop sign that reads as language until you look at a letter.

Draw a box around the suspect region and pick a magnification. The crop is drawn from the source pixels with smoothing off, so what you see is the actual artifact rather than an interpolated guess at it.

Hands and how they meet objects: count the fingers, then check whether the thumb has a joint and where. Faces at the edge of the frame: symmetry holds up close to the centre and degrades toward the edges. Background text and signage: warped glyphs are the most reliable tell in an otherwise convincing image.

The checklist beside the crop records pass or flag for each, so the review ends with a decision rather than a set of screenshots nobody scored. Pixel dimensions of the region are shown so a fix note can point at the same area twice.