Drupal 7 image coloring module

We have created a textbook using book module and embedded custom blocks in page content with custom form for fulfilling tasks on the pages. Users need to color images on the book content page . The images are predefined [login to view URL] images are attached with this mail. After the completion of the coloring task the colored image for every user need to be saved in database along with info like user id,node id and image for future reference purpose.