Segment color patch from test chart and compute RGB/L*a*b* values of each color patch

I was trying to scan a test chart and write a code that would automatically segment each color patch without me manually cropping them. The intention is to calculate the RGB/L*a*b* values for each of the patches in the chart. Pls help.

Answer 1

[Mahmoud Afifi]

You can use deltaE metric and colors that have distances less than 2 can be grouped together.

Check this link http://zschuessler.github.io/DeltaE/learn/