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BPG Image format

bellard.org

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Re: BPG Image format

#121

Very out of topic but, is lena.jpg still acceptable? I mean, tech industry is getting better at inclusion but come on, are we still using that crop from Playboy?

Considering that Lenna herself is fine with it, I'd say so. (Unless you want to deny a woman the right to permit the use of her own body for aesthetic, erotic, or academic purposes, which is the logical if ironic outcome of some schools of feminism.) The problem with the Lenna imagery isn't political correctness, it's the fact that it's a crappy scan from a magazine that always had crappy photography to begin with.

> Unless you want to deny a woman the right to permit

Not doing something you are permitted to do is somehow denying their right to permit? It's nice of her permitting the use, however her permission doesn't force us to use it. By the same logic, it would be perfectly okay use goatse image if the guy permitted it, right?

Re: BPG Image format

#122
post #93

Earlier quoted context omitted.

The results only show marginal improvement. The improvement is far from marginal. In particular: ... I just tried to link you to a BPG image, and discovered that I can't. Well, I'm going to ignore that little flaw for the moment, because that's just a browser feature. If BPG catches on, that's sure to change. Anyway, the improvement is far from marginal: http://a.pomf.se/cdywsc.png In particular, look around her face…

That depends on what you mean by "worse" and "very". I think for most use-cases, those differences are not something likely to be noticed by the majority of users.

The purpose of a test like this is to measure visual performance, and the JPG result is performing very badly.

Open these two images in a separate browser tab, then switch back and forth between them:

http://a.pomf.se/fsnfxz.png

http://a.pomf.se/lfzyrh.png

Those are the upper images of the test. Also try these, the lower images:

http://a.pomf.se/bgqcag.png

http://a.pomf.se/hxlwcm.png

Again, JPG is not merely worse, but very worse. In fact, JPG makes it look like she's wearing a hat that's made of crosshatch material at the top, when in fact the top is composed of rings of fiber, not crosshatch.

Re: BPG Image format

#123

EDIT: I didn't expect this comment to be so popular and feel like I've hijacked the thread a little - sorry. Feel free to continue at https://news.ycombinator.com/item?id=8706850 I would much rather someone revived the Fractal Image format, which is now out of patent. It's very expensive to encode, but that's nowhere near as big a problem as it used to be. It's very fast to decode, very small, and the files are resol…

Fractal compression is a scam. The "resolution independent" part especially.

Re: BPG Image format

#124
post #120

Very out of topic but, is lena.jpg still acceptable? I mean, tech industry is getting better at inclusion but come on, are we still using that crop from Playboy?

I'd say it has enough historical significance to still be acceptable. Consider this: every image compression format out there has an example of their work done on the Lena image. The source code for various compression algorithms may have been lost, but the encoded Lena results for that compression algorithm may very well still exist. This means we can compare between compression algorithms of the past quite easily.…

> I'd say it has enough historical significance to still be acceptable.

This sounds a lot like Redskins argument.

> The source code for various compression algorithms may have been lost, but the encoded Lena results for that compression algorithm may very well still exist.

We need to compare a new algorithm to an obsolete one where we don't even have the source code and this is beneficial... how?

By the way, the image is remastered in 2013 so none of this is relevant anymore: http://en.wikipedia.org/wiki/Lenna#Remastering

Re: BPG Image format

#125
post #18

I was ready to pass by this post with a yawn until I saw where it was coming from: Fabrice Bellard. He's no doubt an absolute freakin' genius. And if anybody knows about image conversion, it's him. Even the things he does just for fun are impressive. Have you ever booted up Linux inside your browser? http://bellard.org/jslinux/

not just about image compression, he also did some Tiny C compiler a while ago. he also had some other nice tech demos...

Re: BPG Image format

#127
I guess the JS is just for proof of concept until support is shipped with browsers etc, but it isn't rendering properly in the stock Android browser (4.2.2).

It gets to Lena's head in the first image, then becomes brigtly multi-coloured, though it looks like the difference between colours right... as if maybe an int overflow in the browser's JS implementation?

Re: BPG Image format

#128
post #103
post #99

Earlier quoted context omitted.

Like how you'll never see H.264, DRM, or WebKit in Firefox?

WebKit in Firefox?

He is referring to " rel="nofollow">https://github.com/mozilla/firefox-ios>.

But you will note that none of those things are "in" Firefox. H.264 support in the tag is implemented via platform-specific APIs (which, for example still don't work on OS X). DRM requires a CDM binary blob, which is again platform specific. You do not have the open-source freedom to port these features to some other platform that does not support them.

Re: BPG Image format

#129
post #68

EDIT: I didn't expect this comment to be so popular and feel like I've hijacked the thread a little - sorry. Feel free to continue at https://news.ycombinator.com/item?id=8706850 I would much rather someone revived the Fractal Image format, which is now out of patent. It's very expensive to encode, but that's nowhere near as big a problem as it used to be. It's very fast to decode, very small, and the files are resol…

Here's the original PC Mag article: http://books.google.com/books?id=RJBJPJvct40C&pg=PA42&lpg=PA...

Wow. "It took almost 4 minutes to convert a 1.3MB .TIF file to a 228K .JPG file." Those were the days.

Re: BPG Image format

#130
post #98

Earlier quoted context omitted.

Are any of the pictures cropped segments of pornographic images?

I dunno, it's kinda hard to tell with this one: http://r0k.us/graphics/kodak/kodim04.html The fact that you call the uncropped image "pornographic" (which, yes, it technically is) when Playboy centerfolds are rather tame by modern standards kinda hints at the real problem here: the boring old American prudishness that has been masquerading as feminism as of late. I sincerely could not care less if Bellard had used Bi…

Now show me a picture of a man from that dataset that could possibly be construed as sexual.

This is not a matter of prudishness. I would be totally fine (see my other comment in this thread) if researchers used both male and female crops, but they don't. So to make your point you need to show me all of the male French researchers who are accepting of male nudity in their image processing research. I would be very surprised if you could find me a single one.

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