Annotation tool for part-based models

Annotation tool Image
A simple Python annotation tool I wrote to collect ground truth for part-based models. This code is designed to be a simple tool for annotating objects in images. An object is defined as a set of parts. Each annotated object must have the same number of parts. Each part is defined as a rectangle in the image. There can be many objects in a single image, e.g. when annotating people in images, the tool allows you to annotate multiple people in an image.