Join Tim Grey for an in-depth discussion in this video Bit depth, part of Photoshop CS6 Quick Start for Photographers.
I assure you there was no pun intended when I decided to use this image of a …whale diving deep into the waters off Alaska to discuss the issue of bit depth. …Bit depth has nothing to do with depth in the way you might normally think of it, …but rather the number of colors actually available for an image. …Generally speaking, you have two options for bit depth, the 8 bit per channel mode …and the 16 bit per channel mode. A bit is a value used by a computer which …essentially means on or off. It's often described as the ones and …zeroes of data, because those values, on or off, are often described as being a …one or a zero, effectively a yes or a no. If we have eight bits, and each bit can …have two possible values, essentially one or zero, that means that there are 256 …possible tonal values per channel. I'll go ahead and open up the channels …panel, and we'll take a look for example at the red channel.…
There are 256 possible shades of gray here If we were working on an …8-bit-per-channel image. And that's because each bit can have two …
- A guided tour of Photoshop
- Setting up your environment
- Color modes, bit depth, and image resolution
- The Histogram
- File formats
- Basic adjustments
- Output workflow
Skill Level Beginner
Up and Running with Photoshop for Photographywith Deke McClelland3h 32m Appropriate for all
Photoshop CS6 Essential Trainingwith Julieanne Kost10h 30m Beginner
1. A Guided Tour
2. Setting Up Your Environment
3. Some Fundamentals
4. Basic Adjustments
5. Wrapping Up the Workflow
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