What does the term chrominance mean?
: the difference between a color and a chosen reference color of the same luminous intensity in color television.
What does characterizing color chrominance refer to?
Chrominance (chroma or C for short) is the signal used in video systems to convey the color information of the picture, separately from the accompanying luma signal (or Y’ for short). Chrominance is usually represented as two color-difference components: U = B′ − Y′ (blue − luma) and V = R′ − Y′ (red − luma).
What is chrominance and luminance?
RGB, YCbCr, Luminance & Chrominance In this system, the Y is known as the Luminance channel and it represents brightness within the image. While Cb and Cr are Chrominance channels representing the color of the picture.
What is luma and chroma?
In video, luma represents the brightness in an image (the “black-and-white” or achromatic portion of the image). Luma represents the achromatic image, while the chroma components represent the color information.
What is a pure chroma color?
Chroma is the attribute that expresses the purity of a color. Mixing a pure hue with black, white, gray, or any other color reduces its purity and lowers the strength of the original hue.
What is chrominance noise?
Color noise or chrominance noise is a random variation of color in relation to the original colors of the image. Unlike luminance noise, color noise is associated with sensor heating. It usually appears as noise in shadows in the form of blotches or bands of color (also known as “banding”).
Why is luminance important?
Luminance is a measure of the intensity of light that reaches the eye. Its unit of measure is candela per square meter (cd/m2), which you don’t really need to know. What’s important is it’s an absolute measure of the intensity of light. It’s how our eyes see the intensity of light.