Hello,
I've read through the project description. Very clearly explained. Well done. I've also looked through the sample pictures in the zip file.
I can do the project for you in Javascript. I am a proficient programmer in Javascript, Java, PHP and C++.
I always do proper unit test so that the code quality is assured. I provide well commented code and documentation.
I put my clients' satisfaction at first priority. My past employer are very satisfied with my work.
Looking forward to working with you!