1. A method, comprising: determining a pixel location on one axis of an image comprising a plurality of pixels; dividing the image into multiple subimages at the determined pixel location on the axis; determining whether each subimage can be cropped to remove regions of white pixels from the subimage; cropping each subimage to remove a region of white pixels in response to determining that the subimage can be cropped; and generating an image file defining the image including the subimages.