Question

I am looking for a method, software or library for simple image analysis.

The input image will be a white-colored background, and some random small black dots on it.

I need to generate a .txt file that represents these dots’ coordinates. That is, if there are three dots in the image the output will be a text file that includes somehow a representation of three coordinates, (x1,y1), (x2,y2), and (x3,y3).

I have searched the web for hours and didn’t find something appropriate, all I found was complex programs for image processing.

I’ve been told that it’s easy to write code for this mission in MATLAB, but I’m unfamiliar with MATLAB.

Can this be done easily with C++, Java or C#?

Any good libraries?

Answer 1

It is quite simple in any language. Depending on the form of your input, you probably need to go over all of it (assuming it is a simple matrix – simply have two nested loops, one for the x coordinate and one for the y coordinate), whenever you encounter a black dot – simply output the current indexes which would be the x and y coordinates for the dot.

As to libraries, anything other than something to decode your input to the form of such a matrix (e.g. a JPEG decoder) would be overkill.