[gloosx]

We're not. This PNG image of a wine glass has JPEG compression artefacts which are leaking from JPEG training data. You can zoom into the image and you will see 8x8 boundaries of the blocks used in JPEG compression, which just cannot be in a PNG. This is a common method to detect AI-generated image and it is working so far, no need for complex photoshop forensics or AI-detectors, just zoom-in and check for compression - current AI is incapable of getting it right – all the compression algorithms are mixed and mashed in the training data, so on the generated image you can find artefacts from almost all of them if you're lucky, but JPEG is prevalent obviously, lossless images are rare online.

[ASalazarMX]

If JPEG compression is the only evident flaw, this kind of reinforces my point, as most of these images will end up shared as processed JPEG/WebP on social media.

[gloosx]

You didn't get it. The image contains ALL compression artifacts from different algorithms mashed up in a single picture, the JPEG is just prevalent.

[ASalazarMX]

Oh, I see. There's still room for reliable detection then.

[londons_explore]

plenty of real PNG images have jpeg artifacts because they were once jpegs off someones phone...