Байгилдина Анастасия

filter.py

@@ -1,28 +1,35 @@
 from PIL import Image
 import numpy as np
-img = Image.open("img2.jpg")
-arr = np.array(img)
-a = len(arr)
-a1 = len(arr[1])
-i = 0
-while i < a - 11:
-    j = 0
-    while j < a1 - 11:
-        s = 0
-        for n in range(i, i + 10):
-            for n1 in range(j, j + 10):
-                n1 = arr[n][n1][0]
-                n2 = arr[n][n1][1]
-                n3 = arr[n][n1][2]
-                M = n1 + n2 + n3
-                s += M
-        s = int(s // 100)
-        for n in range(i, i + 10):
-            for n1 in range(j, j + 10):
-                arr[n][n1][0] = int(s // 50) * 50
-                arr[n][n1][1] = int(s // 50) * 50
-                arr[n][n1][2] = int(s // 50) * 50
-        j = j + 10
-    i = i + 10
-res = Image.fromarray(arr)
-res.save('res.jpg')
+
+
+def count_gray(pixels, pixels_x, pixels_y, size):
+    gray = np.sum((pixels[pixels_x: pixels_x + size, pixels_y: pixels_y + size]) / 3)
+    return int(gray // (size * size))
+
+
+def replace_pixels(pixels, pixels_x, pixels_y, size, step):
+    gray = count_gray(pixels, pixels_x, pixels_y, size)
+    pixels[pixels_x: pixels_x + size, pixels_y: pixels_y + size] = int(gray // step) * step
+
+
+def convert_gray_img(pixels, size, grey_step):
+    step = 255 // (grey_step - 1)
+    height = len(pixels)
+    width = len(pixels[1])
+    pixels_x = 0
+    while pixels_x < height:
+        pixels_y = 0
+        while pixels_y < width:
+            replace_pixels(pixels, pixels_x, pixels_y, size, step)
+            pixels_y = pixels_y + size
+        pixels_x = pixels_x + size
+    return pixels
+
+
+img = Image.open(input('Имя входного файла:'))
+pixels_img = np.array(img)
+size_pixel = int(input('Размер пикселя(блока):'))
+step_gray = int(input('Количество градаций:'))
+res_file = input('Имя для сохранения файла:')
+res = Image.fromarray(convert_gray_img(pixels_img, size_pixel, step_gray))
+res.save(res_file)