Question

I want to split two pictures (pic A and pic B – both same size) to Up and Down Halfs (A-Up,A-Down,B-Up,B-Down), and then create new images: A-up + B-Down and vise versa (meaning: I want to have a new picture that its upper half is in fact the upper of A and the down half is of B). I wrote the next function in python, using PIL module:

import Image  
def SplitFunction(BMP):  
      im = Image.open(BMP)  
      [x,y]=im.size  
      box1=(0,0,x,y/2)  
      box2=(0,y/2+1,x,y)  
      region1 = im.crop(box1)    
      region2 = im.crop(box2)  
      region1.show()  
      region2.show()  
      return [region1,region2]  

path1='c:/movie2frames/BMPs1/stim/1.BMP'  
path2='c:/movie2frames/BMPs1/stim/334.BMP'  

[r1a,r2a]=SplitFunction(path1)  
[r1b,r2b]=SplitFunction(path2)  
#end program 

I don’t know how to paste the new parts. Any help would be much appriciated.

Answer 1

This is actually much easier if you keep the original full-size image and paste a new top half into it.

box_top = (0, 0, x, y / 2)
top_part = im1.crop(box_top)
result = im2.copy()
result.paste(top_part, box_top)