How automate crops of an image

[stevem0]

I have searched for an answer, but can not seem to find a solution, so I apologize for asking if already answered.  (I have read thru slicing, guilotine etc.)

I need to take different segmented crops of an image.  Say my image is 100 tall by 2000 wide (100x2000 pixels)

How do I automatically crop an image 100x750 starting x=0 and crop every 10 pixels and save each image to file?

I want to crop all images 100 tall and 750 wide.  100x750

I want to crop every 10 pixels

image 1; x=0
image 2; x=10
image 3; x=20
;
;
;
image 126; x=1250

When it is complete I will have 126 images saved in a folder.  

Thank You