Week 7

Discussion : Colour

  1. Define the meaning of CMYK and RGB
  2. Differentiate the purpose of;
    • Channel and Colour Correction
    • Saturation and Brightness
Discussion : Colour

  1. Define the meaning of CMYK and RGB

 

CMYK is a scheme for combining primary pigments. The C stands for cyan, M stands for magenta, Y for yellow, and K for Black. CMYK is a color model in which all colors are described as a mixture of these fourprocess color. CMYK is the standard color model used in offset printingfor full-color documents. Because such printing uses inks of these four basic colors, it is often called four-color printing.

 

Cyan, Magenta, Yellow-Subtractive color

 

In contrast, display devices like pc or laptop generally use a different color model called RGB, which stands for Red-Green-Blue. One of the most difficult aspects of dekstop publishing in color is color matching, properly converting the RGB colors into CMYK colors so that what gets printed looks the same as what appears on the monitor.

 

Red, Green and Blue – Addictive color

 

http://graphicdesign.stackexchange.com/questions/60/what-is-the-difference-between-cmyk-and-rgb-are-there-other-color-spaces-i-shou

http://www.ashworthcreative.com/blog/2014/06/difference-cmyk-rgb-colors/

http://whatis.techtarget.com/definition/CMYK-cyan-magenta-yellow-key

http://cruxcreative.com/rgb-vs-cmyk-when-to-use-which-and-why

 

  1. Differentiate the purpose of;
    • Channel and Colour Correction
    • Saturation and Brightness

 

Channels are grayscale images that store different types of information. Color information channels are created automatically when you open a new image. The image’s color mode determines the number of color channels created. For example, an RGB image has a channel for each color (red, green, and blue) plus a composite channel used for editing the image.

 

Saturation is the simplest tool you can find, and works similarly to brightness. It is a linear slider that moves from 0 (black) to 255 (8 bit fully saturated image). Because we have defined our image as an 8-bit image, with a fixed color space, it is impossible to go beyond 255. We call this value ‘full saturation‘

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