U of S | Mailing List Archive | alt-photo-process-l | Re: OT: 16 bit editing myth or reality?

Re: OT: 16 bit editing myth or reality?


If you have a good 16 bit image, try this:

duplicate the image and convert to 8 bits.

Take both images and do a levels adustment by only moving the white point slider to the left until you hit a value of say 50.  This will compress the date a great deal.

Now do another levels adjustment and hit AUTO.... examine the histogram of both images.  You will see that the 16 bit image has no gaps in the histogram and there is still enough fidelity to make additional adjustments.

The 8 bit image is going to look like the back of a porcupine.

It has long been the standard to work in 16 bit.

I might add though that Photoshop is actually a 15 bit program.  If you work with Camera Raw or Scans where the software does do true 16 bit, best do as much of the adjustments that you can there.

Happy Holidays

Best Wishes,
Mark Nelson

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