Question

Which is not a part of the parameters used to define grayscale in gray scale model?

(a) Hue

(b) Contrast

(c) Lightness

(d) Saturation

I got this question at a job interview.

The question is from Gray Scale Vs Binary Imaging in section Machine Vision Systems of Engineering Metrology

Answer 1

Right option is (b) Contrast

The explanation: In some cases, rather than using the RGB or CMY color models to define grayscale, three other parameters are defined. These are hue, saturation and lightness. In a grayscale image, the saturation is apparent color intensity, hue is apparent color shade and lightness is apparent brightness.