How can I vertically align all binary images consisting in a folder?

I have a folder consisting of 50 images with different alignment. I want to make them vertically or standing align. It will check for a condition whether the binary image is vertically or not if vertically align then it will leave it as it is otherwise change it to vertically align. How to do that ? I have uploaded only few images. But my consisting more images. Few images are already in vertically align. Want to create a system that will check for all images and change its orientation.