Programmer who can deal with disjoint sets and create a method to recognise similar objects in image and to put a square on those objects in the image

I have developed a program in intellij using javafx its only partially done but i need someone to develop a method in my program using my disjoint set methods which when user clicks on an object in the image it identifies similar objects in the image by colour and then return the image with squares around the similar objects . The image and program will be attached to this post