Bit Depth
Apr 21, 2012 20:20:04 #
rayford2
Loc: New Bethlehem, PA
When I look at EXIF data one of the categories is "Bit Depth" like: Bit Depth=24.
What is Bit Depth? (I'm glad I never had that question on a test).
What is Bit Depth? (I'm glad I never had that question on a test).
Apr 21, 2012 23:50:19 #
rayford2 wrote:
When I look at EXIF data one of the categories is "Bit Depth" like: Bit Depth=24.
What is Bit Depth? (I'm glad I never had that question on a test).
What is Bit Depth? (I'm glad I never had that question on a test).
I'm glad I never got it as a test question as well.
Trying not to go to bed, I googled it.
I'll have to read these when I've had some sleep:
http://photo.tutsplus.com/articles/post-processing-articles/bit-depth-explained-in-depth/
http://www.cambridgeincolour.com/tutorials/bit-depth.htm
Apr 22, 2012 00:58:00 #
Bit depth is an indication of how many levels of shades are distinguishable for a basic color. Eight bit is standard (255 colors). Twenty-fout bit depth is indicative of a very large number of separate colors and suggests a high level of subtlety is color variation.
Apr 22, 2012 08:04:27 #
rayford2
Loc: New Bethlehem, PA
GoofyNewfie wrote:
I'm glad I never got it as a test question as well.
Trying not to go to bed, I googled it.
I'll have to read these when I've had some sleep:
http://photo.tutsplus.com/articles/post-processing-articles/bit-depth-explained-in-depth/
http://www.cambridgeincolour.com/tutorials/bit-depth.htm
rayford2 wrote:
When I look at EXIF data one of the categories is "Bit Depth" like: Bit Depth=24.
What is Bit Depth? (I'm glad I never had that question on a test).
What is Bit Depth? (I'm glad I never had that question on a test).
I'm glad I never got it as a test question as well.
Trying not to go to bed, I googled it.
I'll have to read these when I've had some sleep:
http://photo.tutsplus.com/articles/post-processing-articles/bit-depth-explained-in-depth/
http://www.cambridgeincolour.com/tutorials/bit-depth.htm
Thanks for those links, GF.
They were an education in something I wasn't aware of (not unusual for me).
I strongly recommend these links to anyone not familiar with bit depth. Read both of them.
Apr 22, 2012 17:18:00 #
Apr 22, 2012 17:26:22 #
ronotley wrote:
Is 24 bit depth refering to 8 bits per colour channel?
That's the way I read it.
Apr 22, 2012 17:37:49 #
Yep. 24-bit is 8-bit depth each for the Red, Green and Blue channels. 2**8 (2 raised to the 8th power) = 256, i.e., 256 shades in each channel. 256x256x256 = 16,777,216, which is the number of shades of color you can generate with all the possible combinations of red, green and blue. If you edit in 16-bit color (achievable with some cameras), you widen the spectrum to 281 trillion colors. That's a bit more than my eyes can discriminate.
There's a nice explanation at: http://www.photoshopessentials.com/essentials/16-bit/
There's a nice explanation at: http://www.photoshopessentials.com/essentials/16-bit/
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