simple and urgent project using javascript

the project is to build a single html page with javascript to generate a munsell colour palette of N most frequent colour from image.
above link(example) only is to generate the munsell color in selected point.
specification is to generate munsell color palette for the entire image.
we can discuss in detail about project in chat.
reference: http://mkweb.bcgsc.ca/color-summarizer/?analyze