I need to do screenshots for web style documentation
If you can't get what you want be cranking the JPEG compression to its lowest setting, use PNG. It is a lossless compression format which support 24-bit color images. The resulting images will be larger, but with zero compression artifacts (meaning, razor sharp text and beautiful images).
Brad Wilson (dotnetguy.techieswithcats.com)
Just save the cap's using JPG with no compresson. You may want to check the settings in the graphics program you're using or change graphics programs if you can't change the settings.
You can't save a JPEG that a normal web browser can use without compression. There will always be compression.
I use a program called HyperSnap-DX for all my screen shot needs, and I've never had any trouble with its compression on full color images.
The alpha channel issue with PNG display in IE, while annoying, is not likely to be an issue for screenshots inserted into HTML.
You can get decent screen shots with a little JPEG compression, and they'll be much faster to load. See http://www.ultrafractal.com/screenshots.html for examples.
I'm using ImageOptimizer (http://www.xat.com/) for taking all my screenshots. It converts the screesnhot bmp's to the neat and small png's. It can also resize and cut them, works like a charm, really.
When I need GIFs I use Corel PhotoPaint to convert 24-bit color to 8-bit color using an "Optimized" palette. It will figure out the ideal 256 colors to make the image look good. If you have an image with lots of shades of red, you'll get a lot of red in the palette. For most images it's hard to distinguish between optimized 8 bit and 24 bit.
Jasc PaintShop Pro 7 or 8 work wonders, too.
For shots I care about, I grab with the printscreen button, then paste into Photoshop. In Photoshop, I resize, possibly sharpen and otherwise adjust the image. Then I compress with Adobe ImageReady, which gets better results than just Photoshop's "Save for Web". If there's a lot of photographic stuff, shadows or gradients use .jpeg. For simple vector shapes, use .gif (rule of thumb).
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