Author Topic: Subsample chorma  (Read 2302 times)

Offline runner

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Subsample chorma
« on: June 14, 2007, 08:22:52 AM »
Hi All
When saving, What does subsample chorma do???

Offline Kirk Baker

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Re: Subsample chorma
« Reply #1 on: June 14, 2007, 09:38:12 AM »
When saving, What does subsample chorma do???

It instructs Photo Mechanic's JPEG compression to subsample the color information in your images when compressing them.  The result is that you trade off some color fidelity to get additional compression.  Photoshop automatically kicks in chrominance subsampling at quality level 6 or 7 and quality levels higher than that do not do the subsampling.

-Kirk