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-   -   Use PNG instead of JPEG for control panel screenshots (http://www.nvnews.net/vbulletin/showthread.php?t=26773)

DSC 03-31-04 11:44 PM

Use PNG instead of JPEG for control panel screenshots
 
On the latest review on Nvnews, the XFX 5950U card:

http://www.nvnews.net/reviews/xfx_ge...ra/page2.shtml

I noticed that JPEG was used instead of PNG for the control panel screenshots. As you can see, the quality is bad, with nasty artifacts all around. Why not standardize on PNG, which has very good compression for these kinds of images and doesn't have the artifacts that are common on JPEG?

|JuiceZ| 04-01-04 12:11 AM

Re: Use PNG instead of JPEG for control panel screenshots
 
We use PNG on screenshots that compare/contast image quality between cards, see some of the older articles. JPG are sufficient for minor things such as ctrl panel screenshots although a couple of those shots could have used lower compression though as they were a bit grainy.

DSC 04-01-04 12:18 AM

Re: Use PNG instead of JPEG for control panel screenshots
 
JuiceZ,

PNG screenshots are smaller in size than JPEG screenshots, try saving a test screenshots in PNG and JPEG and compare.

Clay 04-04-04 11:39 AM

Re: Use PNG instead of JPEG for control panel screenshots
 
Quote:

Originally Posted by DSC
On the latest review on Nvnews, the XFX 5950U card:

http://www.nvnews.net/reviews/xfx_ge...ra/page2.shtml

I noticed that JPEG was used instead of PNG for the control panel screenshots. As you can see, the quality is bad, with nasty artifacts all around. Why not standardize on PNG, which has very good compression for these kinds of images and doesn't have the artifacts that are common on JPEG?

Yeah that was my bad (I edited the review)...JPGs would have been fine for those like JuideZ said but the compression was whacky since it came out of a Word doc which can mangle JPGs at times. I was in a bit of a rush and decided to not worry about it this time. ;)

MUYA 04-04-04 07:16 PM

Re: Use PNG instead of JPEG for control panel screenshots
 
I swear DSC u have some sort of fetish for PNG...it's unhealthy ;)

Sazar 04-04-04 07:31 PM

Re: Use PNG instead of JPEG for control panel screenshots
 
sounds like an unhealthy fetish I might have to try out sometime... :drooling:

Ratchet 04-06-04 12:06 PM

Re: Use PNG instead of JPEG for control panel screenshots
 
GIF would be much better for those types of screenshots.
PNG-8 would be good too, but IE has a gamma bug when using PNG so the color might be a bit off in that browser (no big deal in this case tho).

As for PNG-24, it's a lossless image format and has good things like alpha transparency (which IE doesn't support) but the file sizes tend to be very large. JPG is still best when you want to compare images and aren't too worried about minor artifacts.

Clay 04-06-04 12:41 PM

Re: Use PNG instead of JPEG for control panel screenshots
 
Yeah, GIF is best for non-photo based images. However, GIF also introduces dithering at times and you have to tinker with the pallete which is annoying. In this case the original screen shots were degraded from Word to begin with so GIF isn't going to do anything for you. ;)

SuLinUX 04-06-04 02:07 PM

Re: Use PNG instead of JPEG for control panel screenshots
 
I always use PNG for screen shot's, Linux uses png by default anyway even the icons. Great format as it provies much better and quality than jpg or gif, transparency as well.


Example
http://suseux.commscentral.net:8000/nvidia-panel.png

619x402/32bit/87kb

Clay 04-06-04 02:31 PM

Re: Use PNG instead of JPEG for control panel screenshots
 
Absolutely, PNG is far superior in most every aspect...except for the IE bugs, you just have to be sure to use them correctly as ratchet mentioned. PNGs can be larger than is needed in some cases though (photos for example) so JPGs still fit that role well. The alpha channel feature in PNGs is awesome. I use PNGs all the time for use in fat client form design when developing systems.

mrsabidji 04-08-04 05:01 AM

Re: Use PNG instead of JPEG for control panel screenshots
 
Quote:

Originally Posted by SuLinUX
I always use PNG for screen shot's, Linux uses png by default anyway even the icons. Great format as it provies much better and quality than jpg or gif, transparency as well.


Example
[IMG]

619x402/32bit/87kb

I've optimized your png a bit, quality is still almost the same, just to show that PNG compression can be even more efficient. ;)

http://img31.photobucket.com/albums/...-panel_sab.png

619x402x8bit 48kB
One of the main advantage of the PNG format over JPG, in my opinion, is you can encode files in 8bit when 32bit is not needed (like here).

mrsabidji


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