Dbenbenn/Image tutorial

Here are some technical details that I've learned in the last few months. Slogans * Higher resolution is always better. * Repeated lossy compression is evil. * Always keep the original. == Digital camera == * Set your digital camera to the highest resolution possible. * Set the JPEG compression to the highest quality possible. == Cropping == * Always upload the original, uncropped image first. Someone else might want to crop it differently. * Don't use Photoshop or the Gimp to crop a JPEG file. The remaining part of the image will lose quality. Instead, use jpegtran, which can do various lossless transformations. == Other == * Use pnmpsnr to verify that two images are identical, for example when converting TIFF to PNG. * Use pngcrush to losslessly reduce the size of a PNG file. * Use pnmcrop to crop a diagram to its bounding box. * Choose a good name for your image. ** Avoid CamelCase. ** For an artwork, use the title. ** Otherwise, use something descriptive.

Dbenbenn/Image tutorial

Hi, I just discovered a faster alternative to pnmcrop when converting from postscript: convert -trim foo.ps foo.png seems to be faster (and neater) than convert foo.ps foo.pnm && pnmcrop < foo.pnm | pnmtopng > foo.png Enjoy! User:Lupin 03:22, 16 Apr 2005 (UTC)

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