split-images-vertically.py

#!/usr/bin/env python3
# Author: T Shrinivasan
# Email : [email protected]
# License : GNU GPL 3.0


# sudo apt install libimage-exiftool-perl imagemagick gwenview


#    /etc/ImageMagick-6/policy.xml
#      <policy domain="resource" name="memory" value="2560MiB"/>
#change from 256 to 2560

# This program gets 3 inputs.
#--input_folder,Give the folder path, where the images to be splitted vertically, are kept. Remove any space, special charectors on the folder name.
#--skip_in_beginning,We can skip splitting for the few images in the beginning. Give the number of images to skip.
#--skip_in_end,We can skip splitting for the few images in the end. Give the number of images to skip
#
#All the images are rotated automatically and added few metadata using exiftool.
#convert from imagemagick is used to split the images vertically
#"Use the imageviewer gwenview to view the images, which shows the images in same direction as the images are as original.
#
 
 
import glob
import argparse
import os
import sys
import time
import subprocess

parser = argparse.ArgumentParser(description='Split the images Vertically')

parser.add_argument('--input_folder',
                   help='Give the folder path, where the images to be splitted vertically, are kept. Remove any space, special charectors on the folder name')

parser.add_argument('--skip_in_beginning',
                   help='We can skip splitting for the few images in the beginning. Give the number of images to skip')


parser.add_argument('--skip_in_end',
                   help='We can skip splitting for the few images in the end. Give the number of images to skip')



#parser.add_argument('--rotate',
#                   help='angle to rotate the images')


args = parser.parse_args()
#print(args)


input_folder = args.input_folder
skip_in_beginning = int(args.skip_in_beginning)
skip_in_end = int(args.skip_in_end)

#rotate = args.rotate

#print(input_folder)

print("Making a backup if input folder " + input_folder)
backup_command = "cp -iR  " + input_folder + " " + input_folder + "_backup"
print(backup_command)
subprocess.getstatusoutput(backup_command)



print("Creaing a folder " + input_folder + "/splitted\n")
if not os.path.isdir(input_folder + "/splitted"):
    os.mkdir(input_folder + "/splitted")

all_images = glob.glob(input_folder + "/*")


#print(sorted(all_images)[skip_in_beginning:-(skip_in_end+1)])



print("Adding BitsPerSample to all images")
for image in sorted(all_images):
    add_exifdata = "exiftool -SamplesPerPixel=1 -BitsPerSample=1 " + image
    print(add_exifdata)
    #os.system(add_exifdata)
    subprocess.getstatusoutput(add_exifdata)


print("==========\n")    
    

print("Rotating and Cropping the images\n")

for image in sorted(all_images)[skip_in_beginning:-(skip_in_end+1)]:
#    print(image)

    base_name = os.path.basename(image)
    filename_only = os.path.splitext(base_name)[0]
    extension = os.path.splitext(base_name)[1].strip(".")

#    print(filename_only)
#    print(extension)

 #   if rotate:
    #    rotate_command = "mogrify -rotate '"  + rotate + "' " + image

    rotate_command = "exiftool -Orientation=1 -n " + image
    print(rotate_command)
    #os.system(rotate_command)
    subprocess.getstatusoutput(rotate_command)


    #        time.sleep(5)
    #
    


    command = "convert " + image + " -crop 50%x100% " + input_folder +"/splitted/" + filename_only + "-%01d." + extension
    print(command)

    subprocess.getstatusoutput(command)



for image in sorted(all_images)[:skip_in_beginning]:

    command = "cp " + image + " " + input_folder + "/splitted/"
#    print(command)
    subprocess.getstatusoutput(command)



for image in sorted(all_images)[-(skip_in_end+1):]:

    command = "cp " + image + " " + input_folder + "/splitted/"
#    print(command)
    subprocess.getstatusoutput(command)

#    os.system(command)
#    image_slicer.slice(image, 2)
    #    plt.imshow(imCrop(image)[1])
    #
#    split_image_verticlly(image)
 #   sys.exit()



#    /etc/ImageMagick-6/policy.xml
#      <policy domain="resource" name="memory" value="2560MiB"/>
#changed from 256 to 2560
#https://blog.bigbinary.com/2018/09/12/configuring-memory-allocation-in-imagemagick.html
#https://www.daniloaz.com/en/high-cpu-load-when-converting-images-with-imagemagick/
#https://coderwall.com/p/ovlnwa/use-python-and-pil-to-slice-an-image-vertically

clean_up = "rm -f " + input_folder + "/*_original"
print(clean_up)
subprocess.getstatusoutput(clean_up)

print("All Done.")
print("Check the folder " + input_folder + "/splitted")