Info - Image - Compression: no data
Posted: Wed Apr 30, 2025 8:38 pm
In Browser, info panel - Properties - Image - Compression field there is often missing data (says "None").
So what is (in my opinion) most important function of this field?
Always the more info the better but MOST important would be to know if the image has lossless or lossy compression. There are couple of image formats, most importantly WEBP, JXL, also maybe AVIF/HEIC? that have both lossy and lossless compression options.
According to my very short testing JXL has best lossless compression and WEBP is 2nd.
As JXL still lacks some support I maybe consider WEBP lossless more important for the moment. I intend to convert all PNGs to lossless WEBP as no data will be lost, compression is much better and compability is OK. Then maybe after couple of years i will hopefully convert the WEBP:s to JXL as it feels ultimately better format.
Anyway back to the subject:
- most important for Xnview MP user would be to know if the image content is 1. lossless compression, 2. lossy compression, 3. no compression at all but RAW data.
- most important IMO would be to fix this in following priority order: 1. WEBP, 2/3 JXL/AVIF, 4 HEIC, 5 PDF? (I don't use XNView MP a lot for PDF but noticed that also for it this data field is lacking).
So what is (in my opinion) most important function of this field?
Always the more info the better but MOST important would be to know if the image has lossless or lossy compression. There are couple of image formats, most importantly WEBP, JXL, also maybe AVIF/HEIC? that have both lossy and lossless compression options.
According to my very short testing JXL has best lossless compression and WEBP is 2nd.
As JXL still lacks some support I maybe consider WEBP lossless more important for the moment. I intend to convert all PNGs to lossless WEBP as no data will be lost, compression is much better and compability is OK. Then maybe after couple of years i will hopefully convert the WEBP:s to JXL as it feels ultimately better format.
Anyway back to the subject:
- most important for Xnview MP user would be to know if the image content is 1. lossless compression, 2. lossy compression, 3. no compression at all but RAW data.
- most important IMO would be to fix this in following priority order: 1. WEBP, 2/3 JXL/AVIF, 4 HEIC, 5 PDF? (I don't use XNView MP a lot for PDF but noticed that also for it this data field is lacking).