Frage von Mat:
Hello,
can you explain jmd with what it has with the bit units mean?
Here, I do not mean 1 byte = 8 bits, etc. but the following:
In one picture, each channel has 8 bits for color depth, correct? R + G + B + A = 32-bit and 24 without an alpha channel. If I put a project (create, After Effects, Combustion ,...) it offers me no float at 24 or 32, but 8,10,16. What does it mean?
Antwort von LuFaHa:
Welcome Mat
Quote from the help of AE 6.5
([your installation folder] \ Adobe \ After Effects 6.5 \ Support Files \ (HelpD) \ help.html)
After Effects supports a color depth of 16 bits per channel, thus giving a greater range of colors available. For high resolution images with less color spectrum (For example, if subtle gradients for film effects or produce output HDTV) are the transitions between colors softer. There are fewer stripes remain visible and get more details.
For each project, you can choose which mode you want to work: 8 bits per channel or 16 bits per channel. Combine 16-bit images directly, for example from Adobe Photoshop, and import and correct footage in 16-bit mode. Take advantage when you run the majority of tasks in After Effects, the 16-bit mode. These include level adjustment, Frameüberblendung, 3D and Cineon file import. In the Info palette displays accurate 16-bit color values.
Many effects support 16 bits per channel. If an effect only supports 8 bit and have you set for your Project 16 bits, After Effects displays next to the effect name in the Effect window a warning. The use of an 8-bit effect in a 16-bit Project has a loss of detail in the effect of plain.
When activated for rendering the output module, the "trillions of colors, type in the Project for a color depth of 16 bits. In this way, you benefit of the special color accuracy in the output file. To maximize performance, you can design a composition first in 8-bit color mode, and then finish in the 16-bit mode and spend. "
So: What is meant is dieBit size for each channel.
Bit thinks so "2 ^ [bit]"
If "bits = 8",
is called the "2 ^ 8 = 256" (of 0 to 255, then 256)
With 3 color channels, this means 2 ^ 8 * 2 ^ 8 * 2 ^ 8 = (2 ^ 8) ^ 3 = 2 ^ 24 ie 24 bits total.
At 10, 16, 32 bits per channel, the bill, then, is (2 ^ [number of bits per channel]) ^ [number of channels]
Hope to have helped
Greeting
LFH
PS: By the way: If the color settings in Windows always spoken of 16 or 32 bit, but really know why, do so just about anyone. Have been in a lot of forum nachgehakt.
Antwort von Mat:
Yes, this brings me next. On the help I could even able to come. Thank you!
