Merge pull request #712 from smw-1211/Gradient-Image

New project - Get the gradient form of an image

projects/Gradient-Image/gradient.py

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+#A pencil shaded image representation with better display of edges
+import cv2 as cv
+import numpy as np
+#Code to read images
+
+img = cv.imread('Photos/image.jpg')      #change this path with the path of image passed as an input 
+gray = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
+
+## Just to check the images obtained in grayscale mode and compare with the original image.
+#cv.imshow('image',img)          
+#cv.imshow('Gray Image', gray)
+
+#Laplacian
+lap = cv.Laplacian(gray, cv.CV_64F)
+lap = np.uint8(np.absolute(lap))
+
+cv.imshow('Laplacian Image',lap)
+
+#Sobel Gradient magnitude
+sobelx = cv.Sobel(gray, cv.CV_64F, 1, 0)
+sobely = cv.Sobel(gray, cv.CV_64F, 0, 1)
+combined_sobel = cv.bitwise_or(sobelx, sobely)
+#cv.imshow('Sobel X',sobelx)
+#cv.imshow('Sobel Y',sobely)
+cv.imshow('Sobel Final',combined_sobel)
+
+canny = cv.Canny(gray, 150, 175)
+cv.imshow('Canny',canny)
+
+cv.waitKey(0)                   #keyboard binding function that waits for a specific delay(0 here means to wait for infinite amount of time.)