try to solve 18

Author: JavaProgrammerLB

18.py

@@ -0,0 +1,61 @@
+from PIL import Image
+from PIL import ImageDraw
+import logging
+
+
+def load_a_picture(path):
+    im = Image.open(path)
+    size = im.size
+    logging.info("size is {}, mode is: {}".format(size, im.mode))
+    return im
+
+
+def get_pixel_array(im, left_x, right_x, up_y, down_y):
+    ary = []
+    for x in range(left_x, right_x):
+        for y in range(up_y, down_y):
+                ary.append(im.getpixel((x, y)))
+    return ary
+
+
+def create_new_ary(ary1, ary2):
+    ary = []
+    for i in range(len(ary1)):
+        r1, g1, b1 = ary1[i]
+        r2, g2, b2 = ary2[i]
+        r, g, b = r1 - r2, g1 - g2, b1 - b2
+        t = (r, g ,b)
+        ary.append(t)
+    return ary
+
+
+def analysis_ary(rgbs):
+    for i in range(len(rgbs)):
+        print(rgbs[i])
+
+
+def create_new_picture(pixels, width, height):
+    result = Image.new(mode="RGB", size=(width, height))
+    drawer = ImageDraw.Draw(result)
+    count = 0
+    for x in range(width):
+        for y in range(height):
+            drawer.point((x, y), fill = pixels[count])
+            count += 1
+    return result
+
+
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.DEBUG)
+    im = load_a_picture("swan/balloons.jpg")
+    size = im.size
+    width = size[0]
+    height = size[1]
+    ary1 = get_pixel_array(im, 0, int(width / 2), 0, height)
+    ary2 = get_pixel_array(im, int(width / 2), width, 0 , height)
+    logging.info("len(ary1) is: {}".format(len(ary1)))
+    logging.info("len(ary2) is: {}".format(len(ary2)))
+    ary = create_new_ary(ary1, ary2)
+    analysis_ary(ary)
+    result = create_new_picture(ary, int(width / 2), height)
+    result.show()