points by srean 3 weeks ago

There are a few comments on the unnatural/hallucinated look of the compressed images.

I don't like it, but this is sort of the expected behavior for 'AI' based compression and denoising.

Think of it as encoding followed by decoding where encoding reduces an image to a 'prompt' and decoding a generation of a new image from that prompt.

These techniques have become quite popular in astrophotography and it makes me uncomfortable.

Note though that this strategy is not that fundamentally different from the classic method. There the steps are called analysis followed by synthesis.

Analysis step detects the degree of presence of preferred basis functions (for example, discrete cosine basis), the undesirable components discarded or down-weighted. Then in the synthesis phase, the bases weighted with their detected or accentuated strengths are recombined to obtain the image.

What's different this time is the nature of the bases and the Bayesian prior they encode.

perching_aix 3 weeks ago

> Think of it as encoding followed by decoding where encoding reduces an image to a 'prompt' and decoding a generation of a new image from that prompt.

This is exactly the type of metaphor where the fact that it's a metaphor doesn't survive very long, while also not even being necessary in the first place. So on the contrary, I hope this thought doesn't spread.

> 'AI'

There's no reason for the apostrophes. It's an application of the field, named just that since 1956, 70 years ago.

In agreement with your concerns though.

  • srean 3 weeks ago

    AI is too nebulous, too I'll defined to be used without quotes, almost serious.

    Also the 'prompt' is not a textual prompt of course, but its vector embedded representation.