Show HN: Neural Image Compression Demo • Hacker News Board

Re: Show HN: Neural Image Compression Demo

#21

Post by tombh » Sat, Sep 12, 2020, 10:17 AM UTC

Here's a close up comparison so you can clearly see the differences: https://i.imgur.com/TP1QQpJ.png

Edit: original is on the right

Re: Show HN: Neural Image Compression Demo

#22

Post by est31 » Sat, Sep 12, 2020, 10:17 AM UTC

Reddit thread with the creators of Hific answering questions: https://www.reddit.com/r/MachineLearning/comments/hgkup5/r_h...

Re: Show HN: Neural Image Compression Demo

#23

Post by atorodius » Sat, Sep 12, 2020, 10:32 AM UTC

Nice demo! Thanks for porting our paper to Pytorch, and stay tuned for the official implementation, coming soon.

Also check out the previous discussion on HN:

https://news.ycombinator.com/item?id=23652753

Re: Show HN: Neural Image Compression Demo

#24

Post by tonic_section » Sat, Sep 12, 2020, 10:58 AM UTC

browserface wrote: post #7

Damn I got an error at cell 19 otherwise seemed to work

I pushed a workaround and provided extra instructions in the demo, so anyone experiencing errors should try that.

Re: Show HN: Neural Image Compression Demo

#25

Post by browserface » Sat, Sep 12, 2020, 11:37 AM UTC

tonic_section wrote: post #20

browserface wrote: post #7

Damn I got an error at cell 19 otherwise seemed to work

GDrive doesn't download the model checkpoints correctly sometimes, leading to the following error: ``` # Setup model I get an error in the function call 'prepare_model' UnpicklingError: invalid load key, ' Try rerunning the download cell if you experience this - the models downloaded should be around 1.5-2GB, so if the checkpoints are 100kB in size, the download's gone wrong.

Oh, thanks so much for your replies. Really appreciate your attitude of taking that seriously and trying to mitigate. Not saying that from my point of view of thinking my error is somehow important, just from my experience putting work on HN, and knowing what it feels like when people let you know something goes wrong. Well done!

That was the error I got!

Re: Show HN: Neural Image Compression Demo

#26

Post by tonic_section » Sat, Sep 12, 2020, 12:08 PM UTC

tonic_section wrote: post #2

Hi everyone, I've been working on an implementation of a model for learnable image compression together with general support for neural image compression in PyTorch. You can try it out directly and compress your own images in Google Colab [1] or checkout the source on Github [2]. This project is based on the paper "High-Fidelity Image Compression" by Mentzer et. al. [3] - this was one of the most interesting papers I…

Sorry, looks like both GDrive and Zenodo have exceeded the temporary download quotas, so the model checkpoints aren't available currently... If anyone has any solutions on how to publicly host model weights (~2 GB) please let me know!

Re: Show HN: Neural Image Compression Demo

#27

Post by codewithcheese » Sat, Sep 12, 2020, 12:21 PM UTC

tonic_section wrote: post #26

tonic_section wrote: post #2

Hi everyone, I've been working on an implementation of a model for learnable image compression together with general support for neural image compression in PyTorch. You can try it out directly and compress your own images in Google Colab [1] or checkout the source on Github [2]. This project is based on the paper "High-Fidelity Image Compression" by Mentzer et. al. [3] - this was one of the most interesting papers I…

Sorry, looks like both GDrive and Zenodo have exceeded the temporary download quotas, so the model checkpoints aren't available currently... If anyone has any solutions on how to publicly host model weights (~2 GB) please let me know!

torrent? If you create a torrent I can seed it for a while

Re: Show HN: Neural Image Compression Demo

#28

Post by tonic_section » Sat, Sep 12, 2020, 2:53 PM UTC

codewithcheese wrote: post #27

tonic_section wrote: post #26

Earlier quoted context omitted.

Sorry, looks like both GDrive and Zenodo have exceeded the temporary download quotas, so the model checkpoints aren't available currently... If anyone has any solutions on how to publicly host model weights (~2 GB) please let me know!

torrent? If you create a torrent I can seed it for a while

I eventually shifted the models to S3, but thanks for the offer.

Re: Show HN: Neural Image Compression Demo

#29

Post by fireattack » Sat, Sep 12, 2020, 2:53 PM UTC

The result seems pretty poor to me?

(I just use the exmaple image that is already in the notebook)

Original: https://i.imgur.com/Q66mHTD.png Result: https://i.imgur.com/4R6qn8e.png

There are lots of random spots on the image, and the brightness level changes totally.

Sure, 5232 kB to 124 kB is impressive, but people would probably prefer a badly compressed JPEG over this, since at least JPEG artifact is predictable (and if image isn't displayed in 100%, the artifact would be less obvious, unlike brightness change and spots in this result).

Edit: I just saw the result in https://hific.github.io/ for the same picture, but that one has none of these flaws (no brightness change, no weird spots here and there) with even smaller filesize. Why?

Re: Show HN: Neural Image Compression Demo

#30

Post by have_faith » Sat, Sep 12, 2020, 3:08 PM UTC

fireattack wrote: post #29

The result seems pretty poor to me? (I just use the exmaple image that is already in the notebook) Original: https://i.imgur.com/Q66mHTD.png Result: https://i.imgur.com/4R6qn8e.png There are lots of random spots on the image, and the brightness level changes totally. Sure, 5232 kB to 124 kB is impressive, but people would probably prefer a badly compressed JPEG over this, since at least JPEG artifact is predictable (…

It's a research demo and you seem to frame it in a negative light almost exclusively. Not that your remarks aren't valid (they are). Seems a bit flippant.