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An awesome variation would be to, instead inside web pages, to use this inside PDF files. Some PDF newspaper subscriptions (many times sent by email) have very
by DrNosferatu 4y ago
An awesome variation would be to, instead inside web pages, to use this inside PDF files.
Some PDF newspaper subscriptions (many times sent by email) have very poor quality in the contained photos.
I suppose the intent is to keep the already big file size (multi MB) down. Having the newspaper photos in JPEG XL - or even AVIF - would be a great upgrade.
PS: And no, I don't think the poor quality photos are deliberate as some sort of forced "VHS-style Macrovision" degradation to minimize financial losses on easy to copy content - the same articles are also partially available online.
- niutech 4y agoPDF 1.5 supports JPXDecode filter based on the JPEG 2000 standard.
- DrNosferatu 4y agoBut no JPEG XL, AVIF or HEIF! I think AVIF would be optimally useful.
- aidenn0 4y agoI use jpeg-2k in a PDF for encoding comics; it's better than any pre-JXL compressor I tried for such images; HEIC and webp both blur out the stippling and hatching at much higher bitrates than j2k. JXL soundly defeats it though and is much easier to use (I have to use different quantization settings for greyscale and colour images with openJPEG, but the default "lossy" setting with libjxl never creates a larger file than j2k). So for me, at least, I'd like jxl to make it into PDF.