hstack.py

start_frame =
end_frame = 
for image in range(start_frame, end_frame):

    file_name = 'edge2image_test/images/image_{num:04d}'.format(num=image)
    input_file = cv2.imread(file_name + '-inputs.png')
    output_file = cv2.imread(file_name + '-outputs.png')
    target_file = cv2.imread(file_name + '-targets.png')
    save_file = np.hstack((input_file, output_file, target_file))
    save_name = file_name + '.png'
    cv2.imwrite(save_name, save_file)
    os.remove(file_name + '-inputs.png')
    os.remove(file_name + '-outputs.png')
    os.remove(file_name + '-targets.png')