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BPG Image format

bellard.org

31–40 of 339 posts

Re: BPG Image format

#31
post #24

How many "better JPEGs" have been created now, without significantly displacing JPEG's market share?

Indeed. Without out-of-the-box support in the major image editors like Photoshop and all the popular web browsers, I don't think we'll see JPEG overtaken any time soon.

Re: BPG Image format

#32
post #19

I appreciate the historical tradition of using the photo of beautiful young Lena Söderberg as a test image, but it's time to move on. It's fun for us hetero males, but like it or not, this sends a message to young women that they aren't welcome in this field. I wish Fabrice Bellard would have left them out of the demo set. Having said that, all those demo photos do look good. I was wondering how we were going to see…

What about introducing a new male equivalent image of Lena instead? This approach would at least balance things out while maintaining an image that has become a standard to compare things to for a long time. If I were someone working on image compression techniques I would probably have seen many many algorithms and their output using that image so when I see a new algorithm and a new Lena, I might look at the result…

I think we should also retire the mandrill image since it strikes me as speciesist.

Re: BPG Image format

#33
No doubt Fabrice is very smart. I read about his 4G base station the other day. I'd love to be a fly on the wall while he codes and thinks out these projects.

His accomplishments are impressive: QEMU, FFMPEG, TCC, JSLinux, the list goes on

Re: BPG Image format

#36
post #21
post #17

I notice the container has no ICC profile support. Trivial do add as an extension tag, but should definitely be in the first spec IMO. And if I read this correctly, extension tags are hardcoded as numbers, rather than using a tag name. I don't think that's a good idea.

Well you can think of it as a tag name limited to 4 ascii characters if you like.

Yes, that makes it even stranger. Why use an unsigned 4-byte integer when tags are mapped to a number internally. Unless they anticipate to map more than 2^8-1 or 2^16-1 different tags.

Maybe I'm reading it wrong.

   extension_tag                                           ue7(32)
   ...
  'extension_tag' is the extension tag. The following values are defined:
       1: EXIF data.
PS. I think I understand now. It's just meant as a shortcut. Not sure why this is done when EXIF fits just as well.

Re: BPG Image format

#37
post #2

Don't we already have WebP?

WebP is in some ways superior, in particular because it has a lossless option like PNG. [Edit: NOPE, I was mistaken.] I think it's kind of a shame that it hasn't caught on all that well. Maybe it's a fantasy, but I'd sure like to consolidate all web images into a single widely-supported and open source format. Ah, to dream...

Re: BPG Image format

#38
post #19

I appreciate the historical tradition of using the photo of beautiful young Lena Söderberg as a test image, but it's time to move on. It's fun for us hetero males, but like it or not, this sends a message to young women that they aren't welcome in this field. I wish Fabrice Bellard would have left them out of the demo set. Having said that, all those demo photos do look good. I was wondering how we were going to see…

People are too sensitive. I'm a hetero male, and I don't find the image 'fun' at all... it's just an image. It doesn't send a message to anyone. If anything, I don't really care for it for image algorithm tests because the palette is fairly flat.

No matter how you feel about the image itself, though, there is value in continuing to use it... people are familiar with it, to the point of it becoming almost cliché. This takes the focus off of the image and subject and puts it squarely on the image algorithm.

Re: BPG Image format

#39
post #19

I appreciate the historical tradition of using the photo of beautiful young Lena Söderberg as a test image, but it's time to move on. It's fun for us hetero males, but like it or not, this sends a message to young women that they aren't welcome in this field. I wish Fabrice Bellard would have left them out of the demo set. Having said that, all those demo photos do look good. I was wondering how we were going to see…

People are too sensitive. I'm a hetero male, and I don't find the image 'fun' at all... it's just an image. It doesn't send a message to anyone. If anything, I don't really care for it for image algorithm tests because the palette is fairly flat. No matter how you feel about the image itself, though, there is value in continuing to use it... people are familiar with it, to the point of it becoming almost cliché. This…

> I'm a hetero male ... it's just an image.

That's the exact privilege you get to enjoy as a hetero male. You get to ignore things like this when your female colleagues (if you're lucky enough to work with any) have to look at the image and be reminded that many people continue to view them as objects.

Re: BPG Image format

#40
post #25
post #11

Earlier quoted context omitted.

Yes, it's slower and takes more RAM than JPG. I can see a delay of about a second in my browser. (Edit: I assume my browser is caching the data, but if not, some of that time could be re-downloading the data.)

[Edit] I had misunderstood the quoted Mozilla performance claims[0] to be related to processing speed, whereas they refer to performance being a measurement of quality. Thanks sp332 for the correction. [0] http://people.mozilla.org/~josh/lossy_compressed_image_study...

Compression performance does not mean speed. It just means how well it compressed the images. None of the tests on that page even mention speed.
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