color circle

Author: furas

pillow/color circles/README.md

@@ -1,22 +1,33 @@
-## main.py
+![#1](images/normal_rgb.png?raw=true)   
+
+## Using [Image.merge()](http://pillow.readthedocs.io/en/4.3.x/reference/Image.html#PIL.Image.merge)
 
 Using grayscale layers to create `RGB` image with color circles.
 
-![#1](images/normal_rgb.png?raw=true)   
+![#1](images/normal_result.png?raw=true)   
 
 Using inverted layers.
 
-![#1](images/inverted_rgb.png?raw=true)   
+![#1](images/inverted_result.png?raw=true)   
+
+## Using [ImageChop.add()](en/3.4.x/reference/ImageChops.html#PIL.ImageChops.add)
+
+![#1](images/normal_result_add.png?raw=true)   
+
+![#1](images/inverted_result_add.png?raw=true)   
 
 ---
 
-### Merging images using ImageMagick
+### Creating preview using [ImageMagick](https://www.imagemagick.org/script/index.php#)
 
     $ montage -tile 4x1 normal_layer_r.png normal_layer_g.png normal_layer_b.png normal_rgb.png normal_result.png
 
     $ montage -background black -tile 4x1 inverted_layer_r.png inverted_layer_g.png inverted_layer_b.png inverted_rgb.png inverted_result.png
 
-![#1](images/normal_result.png?raw=true)   
 
-![#1](images/inverted_result.png?raw=true)   
+
+    $ montage -tile 4x1 inverted_layer_r.png inverted_layer_g.png inverted_layer_b.png inverted_add.png inverted_result_add.png
+    
+    $ montage -background black -tile 4x1 normal_layer_r.png normal_layer_g.png normal_layer_b.png normal_add.png normal_result_add.png
+    
 

pillow/color circles/images/inverted_add.png

@@ -0,0 +1,43 @@
+from PIL import Image, ImageDraw, ImageChops
+
+def synthese(red=255, green=255, blue=255, background=0, file_prefix=''):
+
+    # layers in greyscale
+    layer_R = Image.new('L', (450, 450), background)
+    layer_G = Image.new('L', (450, 450), background)
+    layer_B = Image.new('L', (450, 450), background)
+    
+    # draw circle on red layer
+    draw_R = ImageDraw.Draw(layer_R)
+    draw_R.ellipse((10,150,300,440), red)
+    
+    # draw circle on green layer
+    draw_G = ImageDraw.Draw(layer_G)
+    draw_G.ellipse((150,150,440,440), green)
+    
+    # draw circle on blue layer
+    draw_B = ImageDraw.Draw(layer_B)
+    draw_B.ellipse((75,10,375,300), blue)
+    
+    #layer_R.show()               
+    #layer_G.show()               
+    #layer_B.show()
+
+    #layer_R.save(file_prefix + 'layer_r.png')
+    #layer_G.save(file_prefix + 'layer_g.png')
+    #layer_B.save(file_prefix + 'layer_b.png')
+    
+    # create RGB image using greyscale layers
+    image_RGB = Image.merge('RGB', (layer_R, layer_G, layer_B))
+    
+    # show it
+    #image_RGB.show()               
+    #image_RGB.save(file_prefix + 'rgb.png')
+    
+    result = ImageChops.add(layer_R, layer_G)
+    result = ImageChops.add(result, layer_B)
+    result.save(file_prefix + 'add.png')
+    result.show()
+    
+synthese(255, 255, 255, 0, 'normal_')
+synthese(0, 0, 0, 255, 'inverted_')

pillow/color circles/images/inverted_result_add.png

@@ -0,0 +1,29 @@
+from PIL import Image, ImageDraw, ImageChops
+
+def synthese(red=255, green=255, blue=255, file_prefix=''):
+
+    # transparent images
+    image_R = Image.new('RGBA', (450, 450), 0)
+    image_G = Image.new('RGBA', (450, 450), 0)
+    image_B = Image.new('RGBA', (450, 450), 0)
+    
+    # draw circle on red layer
+    draw_R = ImageDraw.Draw(image_R)
+    draw_R.ellipse((10,150,300,440), (red, 0, 0))
+    
+    # draw circle on green layer
+    draw_G = ImageDraw.Draw(image_G)
+    draw_G.ellipse((150,150,440,440), (0, green, 0))
+    
+    # draw circle on blue layer
+    draw_B = ImageDraw.Draw(image_B)
+    draw_B.ellipse((75,10,375,300), (0, 0, blue))
+    
+    result = ImageChops.add(image_R, image_G, 0.5)
+    result = ImageChops.add(result, image_B, 0.5)
+    
+    #result.save(file_prefix + 'add_RGB.png')
+    result.show()
+    
+synthese(255, 255, 255, 'normal_')
+