Fix README regarding lossless webp

rom1504 / img2dataset

Easily turn large sets of image urls to an image dataset. Can download, resize and package 100M urls in 20h on one machine.

MIT License

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Fix README regarding lossless webp #288

Closed jonasricker closed 1 year ago

jonasricker commented 1 year ago

In the README it says

webp at quality 100 is lossless

However, I noticed that with --encode_quality 100, images are smaller than expected. According to the OpenCV Docs, lossless compression is only used if IMWRITE_WEBP_QUALITY is above 100. I verified that using --encode_quality 101 generates images with larger file size.

The README should probably be updated to make users aware of this subtle difference.

rom1504 commented 1 year ago

interesting!

could you PR that please ?