Thursday, November 26, 2015

How to change the file size of images without losing photo quality using Photoshop?

http://graphicdesign.stackexchange.com/questions/11339/how-to-change-the-file-size-of-images-without-losing-photo-quality-using-photosh

If the images are in JPEG or PNG format, then you can use lossless image optimizers such as optipngpngout and jpegtran.
Those tools re-compress images and spend extra CPU time to apply heavier compression. With 20MB files this could take several minutes per file though.
On Mac there's ImageOptim that combines all those tools. For Linux there's Trimage and for Windows punypng web service.

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