Question

What is the equation used to obtain I(Intensity) component of each RGB pixel in RGB color format?

(a) I=1/2(R+G+B)

(b) I=1/3(R+G+B)

(c) I=1/3(R-G-B)

(d) I=1/3(R-G+B)

I had been asked this question in homework.

This question is from Color Models topic in division Color Image Processing of Digital Image Processing

Answer 1

The correct answer is (b) I=1/3(R+G+B)

To elaborate: If an image is given in RGB format then the intensity (I) component is obtained by the equation, I=1/3 (R+G+B).