We have medical x-ray images where the position of certain easy-to-learn visible structures must be encircled with a tool based on ImageJ. The tool will save the coordinates of the identified area to a file.
We provide the images, the tool and some more detailed instructions. You would identify the structures, encircle them, save the positions with a click and move to the next image. This will be done for ~200 images and 5 structures to be identified per image.
Have recurrent need for such tasks.