Does anybody know if there is any patent issue with jpg? I know gif has patent issue that's why we should use png format.
"PNG format is a patent-free compressed format. We hope it will become widely supported; then we will use it. We do have PNG versions of the images on this server. "
http://www.gnu.org/philosophy/gif.html
Regards,
On 5/22/07, Thomas Chung tchung@fedoraproject.org wrote:
Does anybody know if there is any patent issue with jpg? I know gif has patent issue that's why we should use png format.
"PNG format is a patent-free compressed format. We hope it will become widely supported; then we will use it. We do have PNG versions of the images on this server. "
Looks like I found the answer myself.
"As of October 6, 2006, the U.S. patent's 20-year term appears to have expired, and in November 2006, Forgent agreed to abandon enforcement of patent claims against use of the JPEG standard.[6]"
http://en.wikipedia.org/wiki/Jpg
Regardless, I think we should *standardize* our static pages with "png" format only. Regards,
Thomas Chung wrote:
Does anybody know if there is any patent issue with jpg? I know gif has patent issue that's why we should use png format.
"PNG format is a patent-free compressed format. We hope it will become widely supported; then we will use it. We do have PNG versions of the images on this server. "
http://en.wikipedia.org/wiki/JPEG#Potential_patent_issues
US Patent Office found the patent invalid based on prior art a year ago, and it already expired anyway.
That gnu.org page on gif is pretty old. The GIF patents expired a few years ago IIRC.
It seems reasonable to support PNG anyway as its a standard format, so let's see how small gimp will let me squeeze them down in PNG format.
~m
On 5/22/07, Máirín Duffy duffy@redhat.com wrote:
Máirín Duffy wrote:
It seems reasonable to support PNG anyway as its a standard format,
er I meant open :)
~m
Better yet. "Patent-Free" format. :)
Máirín Duffy wrote:
It seems reasonable to support PNG anyway as its a standard format, so let's see how small gimp will let me squeeze them down in PNG format.
What you already do (convert PNG to indexed) is very effective in reducing the file size.
Have you played with pngcrush (or something similar) to reduce the size even more? (unfortunately, we don't have a yummable package for pngcrush)
Hey Nicu!
Nicu Buculei wrote:
Máirín Duffy wrote:
It seems reasonable to support PNG anyway as its a standard format, so let's see how small gimp will let me squeeze them down in PNG format.
What you already do (convert PNG to indexed) is very effective in reducing the file size.
Have you played with pngcrush (or something similar) to reduce the size even more? (unfortunately, we don't have a yummable package for pngcrush)
Yeh, I did! With PNG crush I got the Inkscape-exported, 58KB png down to 48KB and I couldn't squeeze it down anymore. :(
The image (the (FC6 banner in the upper left) has a lot of gradients and JPG compression would look a lot better for the size it's at now (~10k). The previous version which was a jpg was only ~7k. I think there is some way to squeeze PNGs down though for photographic/gradient artwork, but, none of the FOSS tools I can find seem to do it. :(
~m
On Wed, 2007-05-23 at 11:03 -0400, Máirín Duffy wrote:
The image (the (FC6 banner in the upper left) has a lot of gradients and JPG compression would look a lot better for the size it's at now (~10k). The previous version which was a jpg was only ~7k. I think there is some way to squeeze PNGs down though for photographic/gradient artwork, but, none of the FOSS tools I can find seem to do it. :(
Considering everything:
... wanting a small page that loads quickly ... wanting graphics that look nice ... wanting to adhere to standards of freedom
Let's use JPEG and be happy we can.
- Karsten
On Thu, 24 May 2007, Karsten Wade wrote:
On Wed, 2007-05-23 at 11:03 -0400, Máirín Duffy wrote:
The image (the (FC6 banner in the upper left) has a lot of gradients and JPG compression would look a lot better for the size it's at now (~10k). The previous version which was a jpg was only ~7k. I think there is some way to squeeze PNGs down though for photographic/gradient artwork, but, none of the FOSS tools I can find seem to do it. :(
Considering everything:
... wanting a small page that loads quickly ... wanting graphics that look nice ... wanting to adhere to standards of freedom
Let's use JPEG and be happy we can.
JPEG is a lossy in this case, I do not agree it looks nice.:) It's good for high resolution photos bud not for shaped graphics. If you have a source in lossles format then png is the best quality/size option.. I'm very unpleased about fedora logo on wiki front page as it has ugly yellowish shadows = JPG. Just check it with pipete in gimp wherether its white or not.
- Karsten
--
Adam Pribyl
On Wednesday 23 May 2007, Máirín Duffy wrote:
Yeh, I did! With PNG crush I got the Inkscape-exported, 58KB png down to 48KB and I couldn't squeeze it down anymore. :(
The image (the (FC6 banner in the upper left) has a lot of gradients and JPG compression would look a lot better for the size it's at now (~10k). The previous version which was a jpg was only ~7k. I think there is some way to squeeze PNGs down though for photographic/gradient artwork, but, none of the FOSS tools I can find seem to do it. :(
Since JPEG is lossy and PNG is not, JPEG has a bit of an advantage in reducing image sizes. As was already pointed out, reducing bit depth helps. If you haven't already, give optipng a try. It's in our repositories. :-)
Patrick W. Barnes wrote:
Since JPEG is lossy and PNG is not, JPEG has a bit of an advantage in reducing image sizes. As was already pointed out, reducing bit depth helps. If you haven't already, give optipng a try. It's in our repositories. :-)
Yeh, I understand that PNG is not lossy and JPEG isn't. I just thought there might be some trickery like saving a lossy JPEG out as a PNG? I used to use Macromedia Fireworks back in the day and it was a lot better at compressing PNGs pretty small without too poor a quality hit but they do crazy stuff with PNGs too like adding in vector support.
I will definitely give optipng a try but I don't have much hope of getting it down to 7k like in the jpg. :( I did indeed reduce the bit depth as well.
~m
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