From ac508d382b058b89e5d8734b89c128ed3df58b2e Mon Sep 17 00:00:00 2001
From: Nekot94 <nekomato9@gmail.com>
Date: Tue, 6 Sep 2016 02:17:46 +0300
Subject: [PATCH] Create kernel_filters.py

---
 kernel_filters.py | 121 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 kernel_filters.py

diff --git a/kernel_filters.py b/kernel_filters.py
new file mode 100644
index 0000000..8ce1ab2
--- /dev/null
+++ b/kernel_filters.py
@@ -0,0 +1,121 @@
+from  PIL import Image
+from random import randrange
+
+#соответствие диапазону
+def constrain(val, min_val, max_val):
+    return min(max_val, max(min_val, val))
+
+#функция наложения матрицы
+def kernel(pixels,mat,l,div):
+	rRes, gRes, bRes = 0, 0, 0
+	for c in range(l):
+		for k in range(l):
+			rBuf, gBuf, bBuf = pixels[i - l // 2 + c, j - l // 2 + k]
+			rBuf, gBuf, bBuf= rBuf * mat[c][k] , gBuf * mat[c][k] , bBuf * mat[c][k]
+			rRes  += rBuf
+			gRes  += gBuf
+			bRes  += bBuf  
+
+	rRes = round(rRes / div)
+	gRes = round(gRes / div)
+	bRes = round(bRes / div)
+
+	rRes = constrain(rRes,0,255)
+	bRes = constrain(bRes,0,255)
+	gRes = constrain(gRes,0,255)
+
+	return rRes, gRes, bRes
+
+
+#матрицы фильтров
+blur = [[1, 2, 1],
+		[2, 4, 2],
+		[1, 2, 1]]
+
+
+emboss = [[-2, -1, 0],
+		 [-1, 1, 1],
+		 [0, 1, 2]]
+
+sharpen = [[0, -1, 0],
+		  [-1, 5, -1],
+		  [0, -1, 0]]
+
+edged = [[0, 1, 0],
+		 [1, -4, 1],
+		 [0, 1, 0]]
+
+edgee = [[0, 0, 0],
+		 [-1, 1, 0],
+		 [0, 0, 0]]
+
+sobelh = [[1, 2, 1],
+		  [0, 0, 0],
+		  [-1, -2, -1]]
+
+sobelv = [[1, 0, -1],
+		 [2, 0, -2],
+		 [1, 0, -1]]
+
+bblur = [[1, 1, 1],
+		 [1, 1, 1],
+		 [1, 1, 1]]
+
+#осторожно!!!
+mblur =   [[1, 0, 0, 0, 0, 0, 0, 0, 0],
+		  [0, 1, 0, 0, 0, 0, 0, 0, 0],
+		  [0, 0, 1, 0, 0, 0, 0, 0, 0],
+		  [0, 0, 0, 1, 0, 0, 0, 0, 0],
+		  [0, 0, 0, 0, 1, 0, 0, 0, 0],
+		  [0, 0, 0, 0, 0, 1, 0, 0, 0],
+		  [0, 0, 0, 0, 0, 0, 1, 0, 0],
+		  [0, 0, 0, 0, 0, 0, 0, 1, 0],
+		  [0, 0, 0, 0, 0, 0, 0, 0, 1]]
+
+#кофэициент
+div = 1
+
+#путь к картинке
+path = "CFancy.jpg"
+
+#куда сохранить картинку
+spath = "CFancy2.jpg"
+
+mat = blur
+im = Image.open(path)
+im2 = Image.open(path)
+pixels = im.load()
+pixels2 = im2.load()
+x, y = im.size
+print("Введите название фильтра: blur, emboss, sharpen, edged, edgee, sobelh, sobelv, mblur")
+mode = input()
+if mode == "blur":
+	mat = blur
+	div = 16
+if mode == "emboss":
+	mat = emboss
+if mode == "sharpen":
+	mat = sharpen
+if mode == "edged":
+	mat = edged
+if mode == "edgee":
+	mat = edgee
+if mode == "sobelh":
+	mat = sobelh
+if mode == "sobelv":
+	mat = sobelv
+if mode == "mblur":
+	mat = mblur
+	div = 9
+
+
+l = len(mat)
+for i in range(x):  
+	for j in range(y):
+		r, g, b = pixels[i, j]
+		if i in range(l // 2, x - l // 2) and j in range(l // 2, y - l//2):
+			r, g, b = kernel(pixels, mat,l,div)
+		pixels2[i, j] = r, g, b
+
+im2.save(spath)       
+im2.show()