Changing a black and white image to color

Write a MATLAB script called Exam3Problem3.m that can modify the JPG into a color image. Note: you can type the filename explicitly in your script without asking the user to browse the figure in this problem. Your new color image should have these features: •Black background •Largest object in red •Smallest object in blue •all other objects in yellow (HINT: Yellow is a mix of Red and Green) • Label the centroid of each object by a black "+" sign • Use the plot function to connect the centroids of each object from smallest to largest with green lines (line thickness of 5). (HINT: I need to connect ALL centroids starting from the smallest shape to the largest shape. Try to learn the sort.m MATLAB function.)

Answer 1

[Image Analyst]

Study my Image Segmentation tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 and you'll be able to do this. Look at how I convert a labeled image to a color image. You just need to supply the proper colormap that is what the question asks for. You can use plot() or line() to draw lines between various centroids.