Merge pull request larymak#70 from SaraSen/main

Pencilsketch app

Author: larymak

.gitignore

@@ -1,2 +1,4 @@
 .vscode/extensions.json
 SudokuSolver/__pycache__/sudoku.cpython-38.pyc
+.idea
+pencilSketch/venv/

pencilSketch/main.py

@@ -0,0 +1,20 @@
+import cv2
+
+#reading image
+image = cv2.imread("res/girl3.jpg")
+
+#converting BGR image to grayscale
+#cvtColor -> https://docs.opencv.org/3.4/d8/d01/group__imgproc__color__conversions.html#ga397ae87e1288a81d2363b61574eb8cab
+gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+
+#image invert
+inverted_image = 255 - gray_image
+
+#blurring image
+#GaussianBlur -> https://docs.opencv.org/master/d4/d86/group__imgproc__filter.html#gaabe8c836e97159a9193fb0b11ac52cf1
+blurred_image = cv2.GaussianBlur(gray_image, (43, 43), 0)
+pencil_sketch = cv2.divide(gray_image, blurred_image, scale=250.0)
+
+cv2.imshow("Original Image", image)
+cv2.imshow("Pencil Sketch", pencil_sketch)
+cv2.waitKey(0)