PNG and Other lossless picture formats.

[zerowalker]

I have tried out Webp and PNG(Pngout).

And form my view, pngout (best png compressor??), is much faster in decoding, while losing a bit in size.

Webp is the winner in size but it´s slow when decoding.

I normally don´t care about decoding a picture, as long as it´s withing 1 sec in normal ranges (1080p etc).

But when i have many pictures, and want to go through them fast, i noticed how irritating it was with Webp, as it always lagged behind, so i had to speed down the browsing.

Which is why i looking at pngout.
However, i am not sure if pngout alters the decoding speed, or if it´s only the compression speed, and i have no why of testing it, which i would like to do.

And with that, i wonder, what are the options out there?
What do you use, why do you use it?

[filler56789]

Well, complex formats are always more difficult to both compress and decompress..... I am not a big fan of VP8, so I don't use WebP. When I want or need to include pictures in PDF files, I use JPEG2000 :cool: Just for the notes, the .CMP format (LEAD's technology) generally compresses even more than JPEG2000, but it is even slower too, of course. :)

[zerowalker]

Yes very true. But sometime the Decoding part can be quite close, i think at least Zip 7-zip etc have fast decompression no matter what the compression is, however RAM usage differs with settings.

Is Jpeg2000 better than jpeg, never actually got hold of that?

.CMP, hmm never heard of that, will look at it:)

[mariush]

JPEG 2000 just like Microsoft's JPEG XR (http://en.wikipedia.org/wiki/JPEG_XR) have patents in them.

The improvements of JPEG2000 over JPG were too small to get people bothered with it, and browsers and software built into operating systems didn't support the files natively so it didn't catch on.

PNG is open source, MNG/APNG makes animated files using png as base, GIF is now also no longer patented...

[filler56789]

Well, I guess the patents around JPEG2000 are less problematic than the ones around JPEG XR.
At least "some people" use JPEG2000, whereas "nobody" :devil: uses Microsoft's JPG :D

Also, lossless JPEG is not supported by many/most/all web browsers either.

[zerowalker]

So pretty much in quality wise it´s: JPEG XR < JPEG 2000 < JPEG ? (probably the arrows are wrong, can´t get them right in these cases).

As for patents, i am personally not bothered , but if i use if for public use, then that´s another case.