Color ix--in a computer overview: RGB and HSV Quick conversions

Wrote a paragraph about the color of the article, review the past several articles, do a phased summary. Using the experience of the previous articles, the formula for fast conversion of RGB mode and HSV mode is deduced.

RGB mode: Use R, G, b three color components to represent color, the value range of components is [0,255], Integer

HSV mode: Uses H, S, v three components to represent the color.

Component h: Hue of color, value [0,360], Integer

Component S: The purity of the color, the value [0,1], the floating-point type

Component V: Indicates the brightness of the color, the value [0,1], the floating-point type

For more information, see "Color III--HSV notation on your computer"

1, RGB to HSV

How to quickly convert color (r,g,b) to (H,S,V)

See the article "Colors in your computer iv--solid, hue", "colors in your computer v--quickly calculate the hue value of a color"

Max is the maximum value of three components of R, G, B, and Min is the minimum of three components.

If Max=min, then

H=0

S=0

v=max/255

If Max≠min

When G≥b,

H= (max-r ' +g '-min+b '-min)/(max-min) x60

S=1-min/max

v=max/255

When G

h=360-(max-r ' +g '-min+b '-min)/(max-min) x60

S=1-min/max

v=max/255