Sometime ago my friend Oskar approached me with the results of an experiment that was mind blowing. He ran an experiment which enlightened me regarding the aspect of working with JPEG format files that drastically impacts image quality.
At the core of Oskar’s observation is that when working with a JPEG file, in many programs (potentially even Photoshop), each alteration made will prompt a save in the program before you manually pursue a final save of your changes. The end result is not just one round of data loss due to JPEG compression when you save your final version of an image, but several rounds of data loss reflecting the number revisions made before your final image is saved.
Check out the results with images. It might just blow your mind too and drive home why working with lossless formats (PSD, TIFF & RAW+Sidecar Files) are so critical.
[tags]JPEG, compression, lossless, image format, Photoshop, data loss, image quality, RAW, TIFF[/tags]