Gray scale range corresponding to colors (red, yellow, green, blue, purple, pink, brick red and magenta) in HSV color space

SV The gray range corresponding to different colors in the color space

In the field of machine vision , Except for the shape of the object , Texture feature detection and recognition , You can also use color to identify different objects .

For example, the maturity of fruit .HSV refer to Hue Hue component ,Saturation saturation ,Intensity Brightness .

The following excerpt from Baidu Encyclopedia ：

tonal H

Measure in terms of angles , The value range is 0°～360°, Counting counter clockwise from red , Red as 0°, Green is 120°, Blue 240°. Their complementary color is ： Yellow is 60°, Blue is 180°, Fuchsin is 300°;

saturation S

saturation S Indicates how close the color is to the spectral color . A color , It can be seen as the result of mixing some spectral color with white . The larger the proportion of spectral color is , The closer the color is to the spectral color, the higher , The higher the saturation of the color . High saturation , The color is deep and brilliant . The white component of the spectral color is 0, The saturation reaches the highest . Usually the value range is 0%～100%, The bigger the value is. , The more saturated the color .

brightness V（I： Lightness ）

Lightness means how bright a color is , For light source color , The value of luminosity is related to the luminosity of the illuminant ; For object color , This value is related to the transmittance or reflectance of the object . Usually the value range is 0%（ black ） To 100%（ white ）.

stay HSV Color component in color space Hue The gray scale range corresponding to different colors is as follows ：

0<=h<20, Red

30<=h<45, yellow

45<=h<90, green

90<=h<125, Cyan

125<=h<150, Blue

150<=h<175, violet

175<=h<200, Pink

200<=h<220, Brick red

220<=h<255, magenta

Because I'm not very sensitive to color , Like green and cyan , Various red , Need to train in life .

We can according to the object Hue The color category of the component to judge the gray range , In turn, , It can also be based on Hue The gray range of the component is used to judge the color type of the object .