How to convert gray image to HSV plane S - value image?

Hi,

Given my image is a gray image and i don't have the rgb image of this gray image, can i know how can i convert this gray image to the HSV colour plane S - value plane image only?

[DGM]

Consider a cone.

Consider a point P which lies on the central axis of the cone.

What is the distance from P to the nearest point on the central axis of the cone?

Answer 1

[Walter Roberson]

Hsv=rgb2hsv(repmat(YourMatrix, 1, 1, 3));
S = Hsv(:, :, 2) ;

By the way the results are all 0. The h plane is all 0 too.