Greyscale of HSB Colour Model - Discs

Greyscale of HSB Colour Model – Discs

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Description

Greyscale of HSB Colour Model - Discs

TRY SOME QUICK QUESTIONS AND ANSWERS TO GET STARTED
What is meant by brightness in the HSB colour model?
In the HSB colour model brightness (colour brightness) refers to the difference between the way a colour appears to an observer in well-lit conditions compared with its subdued appearance when in shadow or when poorly illuminated.
What is a greyscale diagram?
A greyscale is a diagram that shows the saturation and brightness of a range of colours with their hues removed.
What are the secondary colours produced by the HSB colour model?
The secondary colours produced by the HSB colour model are the same as the RGB colour model: cyan, magenta and yellow.
What are the primary colours in the HSB colour model?
The primary colours in the HSB colour model are the same as the RGB colour model: red, green and blue.
What do H, S and B stand for in the HSB colour model?
H = hue, S = saturation, and B = brightness in the HSB colour model?

About the diagram

Some key terms

Greyscale colour model

In the context of images, a greyscale colour model represents a picture using only shades of grey, from pure black to pure white. There’s no colour information included. This is commonly used in black-and-white photography or to convert colour images into black and white.

  • The greyscale colour model is used for:
    • Converting colour images to black-and-white.
    • Creating black-and-white images through cameras, scanners, and other input devices.
  • Three algorithms are commonly used for greyscale conversion: the lightness method, the weighted average method, and the luminosity method.
  • The greyscale colour model is not a simple linear scale from black to white but rather a method of converting colour brightness to reflect tonal relationships. When converting digital images to greyscale, each pixel is assigned a corresponding level of brightness based on its colour.
  • When fully saturated spectral colours are converted to greyscale, their brightness typically ranges between 11% and 89%. For example:
    • Red = 70%
    • Orange = 40.38%
    • Yellow = 11%
    • Green = 41%
    • Blue = 89%
    • Violet = 74.06%
  • Any RGB decimal colour value can be converted to greyscale. For instance, the RGB value for cyan converts to a greyscale value of 178, 178, 178. Similarly, HSB colour values can also be converted to greyscale, with the HSB value for pure yellow being Hue = 0, Saturation = 0, and Brightness = 11%.

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