Question

I am trying to make a program that loads and image and then splits it in different parts and saves these differenct parts in a folder. However, instead of saving the cropped image it saves the whole image

 import sys, pygame
 from pygame import *
 pygame.init()
 while True:
     image=pygame.image.load(raw_input("Enter the file: "))
     rows=int(input("Enter the number of rows: "))
     columns=int(input("Enter the number of columns: "))
     output=raw_input("Enter the output folder: ")
     width=image.get_width()/columns
     height=image.get_height()/rows
     print ("In progress...")
     for i in range(0, rows):
         for j in range(0, columns):
             cropped_image=pygame.transform.chop(image, (j*columns, i*rows, width, height))
             cropped_output=output+"/" + str(i)+"_"+str(j)+".png"
             pygame.image.save(cropped_image, cropped_output)
     print ("completed")

instead of saving cropped_image (only a part of the image) it saves the whole image. Any idea why it dosen’t work?
Thanks

Answer 1

You are chopping into tiles of size width x height. So the origin of the tile on row i and column j is j*width, i*height – not j*columns, i*rows.