Fixes for Py3 and Newer numpy

README.md

@@ -14,14 +14,15 @@ Heavily adapted from [this StackOverflow answer][so] by [fraxel][fr] and [this c
 
     halftone.py [-h] [-a ANGLES [ANGLES ...]] [-b {1,2,4,6,8}] [-c] [-d]
                    [-e EXTRA_FILE_NAME] [-f FILL] [-g GRAY] [-p SHARPNESS]
-                   [-s SIZE]
+                   [-s SIZE] [-l]
                    file
 
 Creates four CMYK images and a combined image.  Provides options for haltoning or not (-d)
 
 | OPTION 				 | DESCRIPTION                                     | Default | 
 | ---------------------- | ----------------------------------------------- | ------- | 
 | -h, --help             | show this help message and exit                 | n/a     | 
+| -l, --halftone         | halftone the image                              | False   | 
 | -b, --bits {1,2,4,6,8} | bits of color info per channel                  | 8       | 
 | -c, --colorize_CMYK    | save CMYK files as RGB color images             | False   | 
 | -d, --do_not_halftone	 | don't do halftoning                             | False   | 

TiffWriter.py

@@ -47,7 +47,7 @@ def write_tiff(file_name, img, bit_depth=8, photometric=None, DPI=200):
         Affects: Writes over existing files without warning
     """
 
-    print file_name
+    print(file_name)
 
     if len(img.shape) == 1:
         height = 1

halftone.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 from PIL import Image
 import numpy as np
 from scipy.ndimage.interpolation import rotate
@@ -20,7 +18,8 @@ def crop_center(img, new_shape):
     """
     ul = ((img.shape[0]-new_shape[0])/2, (img.shape[1]-new_shape[1])/2)
     br = (ul[0]+new_shape[0], ul[1]+new_shape[1])
-    return img[ul[0]:br[0], ul[1]:br[1]]
+    #print(f"ul[0]= {ul[0]} : br[0]= {br[0]}, ul[1]= {ul[1]}: br[1]= {br[1]}")
+    return img[int(ul[0]):int(br[0]), int(ul[1]):int(br[1])]
 
 
 def gauss_kernel(size, sigma=None, size_y=None, sigma_y=None):
@@ -108,7 +107,10 @@ def halftone(cmyk, size, angles, fill, sharpness):
 
         # tile the kernel across the image
         num_kernels = np.array(rotated.shape) / s + 1
-        tiled_kernel = np.tile(kernel, num_kernels)
+        # print(f"kernel: {kernel} - num_kernels: {num_kernels}")
+        # print(f"kernel: {type(kernel)} - num_kernels: {type(num_kernels)}")
+        # print(num_kernels[1])
+        tiled_kernel = np.tile(kernel, (int(num_kernels[0]), int(num_kernels[1])))
         tiled_kernel = resize(tiled_kernel, rotated.shape)
 
         # multiply the kernel image with the weights to generate the halftone image
@@ -118,6 +120,7 @@ def halftone(cmyk, size, angles, fill, sharpness):
         halftone = rotate(halftone, -angle, prefilter=False, order=1)
 
         # crop the image to the original size
+        #print(f"channel.shape: {channel.shape}")
         halftone = crop_center(halftone, channel.shape)
 
         # add this chanel to the full cmyk image
@@ -205,7 +208,7 @@ def test():
     try:
         im = Image.open(args.file)
     except IOError:
-        print "Cannot open ", args.file
+        print("Cannot open ", args.file)
         exit(1)
 
     # convert to numpy array