I have a huge image file with more than 1200 objects on it. I need to crop one by one with 300x300 pixels. I can do it manually by selecting the area of object with crop tool, and crop it and save it. I would needed couple of days/weeks to achieve this :-) Are there any patterns in Gimp or PS that I can use or create, or how should I go about it?
If the objects are regular tiles of a know dimension, there are several Gimp scripts around to chop the image and export the individual tiles, such as the
ofn-tiles script you will find here.