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Y′UV, also written YUV, is the color model found in the PAL analogue color TV standard. A color is described as a Y′ component and two chroma components U and V. The prime symbol (') denotes that the luma is calculated from gamma-corrected RGB input and that it is different from true luminance. [1]
In the diagrams below, the numerical suffix attached to each Y, U or V sample indicates the sampling position across the image line, so, for example, V0 indicates the leftmost V sample and Yn indicates the Y sample at the (n+1)th pixel from the left.
3 Ιουλ 2015 · In YUV, ‘Y’ represents the brightness, or ‘luma’ value, and ‘UV’ represents the color, or ‘chroma’ values. In contrast, the values of the RGB encoding scheme represent the intensities of red, green and blue channels in each pixel. Each unique Y, U and V value comprises 8 bits, or one byte, of data.
Some common color models include RGB, YUV 4:4:4, YUV 4:2:2, and YUV 4:2:0. This page aims to explain the representation of color in a video setting while outlining the differences between common color models.
The IYU1 format is a 12 bit format used in mode 2 of the IEEE 1394 Digital Camera 1.04 spec ("1394-based Digital Camera Specification, Version 1.04, August 9, 1996", page 14.). The format, a duplicate of Y411 , is YUV (4:1:1) according to the following pattern:
Digital image and video objects record and store colour information in different ways depending on their format and encoding methods.
Explains how to describe YUV format types in Media Foundation. Chroma channels can have a lower sampling rate than the luma channel, without any dramatic loss of perceptual quality. A notation called the "A:B:C" notation is used to describe how often U and V are sampled relative to Y: 4:4:4 means no downsampling of the chroma channels.
