Quote:
Originally Posted by Stephen
For me the workflow is to use PS CS2 and Adobe Camera Raw. The screen grab attached shows the ACR dialogue with the resolution menu open, and you can see the options available when processing your file. My theory is that its better to upsize in ACR or at this stage, because you are interpolating effectively a file that has still not had its final condition decided. Whilst if it was upsized from a jpeg this is another stage. I've not personally tested the theory, but then I'm not a 'measurebator' I just know that this works for me and the end product speaks for itself. Its what being a real world photographer is all about 
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I have just been running some tests on the above quote. Whenever I had to resize an image I would just resize in CS with image resize in small increments on a jpg image. I have just done a resize using the above method and the method I normaly use, I am very surprised at the diference at the same magnification. I have put a sample so you can see the diference.
The left hand of the pair is the Raw upsized and the right is using the image resize
Thanks Stephen for sharing that one I didn't know about it.