Picture Compression.

[Kjonnnn]

When I look on various websites, especially news sites, I see very high quality jpeg pics. They are usually about 7kb in size.

What compression level is good to use to have a high quality by small sized pic.

What about the resolution when a pic is scanned. What roll does that play.

 

[SPYDERIX]

Hi,

They have used ImageReady to optimize the files to make them really small in file size.

As for the compression level, you need to adjust the quality level bar when you are saving at notice the difference. It depends for what picture you are using.

As for the resolution. Web graphics are 72DPI.

Hope this helps! NATE

design@spyderix-designz.com

http://www.spyderix-designz.com

 

[Kjonnnn]

Thanks it does...

 

[mThomas]

Another consideration is the color saturation. Reds and blues tend to not compress as well as yellows and greens. When compressing a jpg, the larger the compression level the greater loss in image data which results in compression artifacts. Also the compressing will tend to mute all the color values.

mike

 

[GUJUm0deL]

What I do is in Photoshop, when you save for web, there is a black triangle, if you click on that you see a choice called "optimize for file size", or something like that (i'm not near a PS so I cannot double check)...in there you can manualy tell the software how big to make the image without compromising the quality of the graphic...
Photoshop rules!! LOL... I have not failed; I merely found 100,000 different ways of not succeding...

 

[xutopia]

JPEG compression is usually acceptable at around 30-34% of compression for web use.

You can have plenty of decent information in the Yale Web Style Guide :

http://info.med.yale.edu/caim/manual/contents.html

Gary

http://www.xutopia.com

Haran