How I want to segment the three different fruits by using the color intensity of each fruit?

Answer 1

[Blue Bird]

There are two examples from MathWorks that may be useful.

The first one transforms RGB to LAB. Components A and B are colors without the disturbance of light. By considering the distance between the standard colors to colors in your figure, the fruits may be separated. We may do a little change on this example, e.g. calculating histograms of colors for different fruit. See ‘. Color-Based Segmentation Using the L*a*b* Color Space’ .

The second one collects the similar colors with clus tering technology. MATLAB can automatically generate the code that you want. See Segment Image Using Auto Cluster.

Answer 2

[Image Analyst]

Maybe try rgb2ind() telling it that there are 6 or 7 colors (white, black, red, orange, yellow, light green, dark green) and see what it comes up with.