colourspace and histogram examples

src/helpers/algorithms/colourspace.py

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+import cv2
+import matplotlib.pyplot as plt
+
+DATASET_PATH = "C:\\Users\\tomse\\Documents\\Dataset\\"
+
+full_img = cv2.imread(DATASET_PATH + "alder\\1.jpg", 1)
+bgr_img = cv2.resize(full_img, (0, 0), fx=0.2, fy=0.2)
+hsv_img = cv2.cvtColor(bgr_img, cv2.COLOR_BGR2HSV)
+
+cv2.imshow('BGR',bgr_img)
+cv2.imshow('HSV',hsv_img)
+cv2.imshow('HSV - H',hsv_img[:, :, 0])
+cv2.imshow('HSV - S',hsv_img[:, :, 1])
+cv2.imshow('HSV - V',hsv_img[:, :, 2])
+
+
+hist = cv2.calcHist([hsv_img], [0], None, [256], [0,256])
+plt.plot(hist, label='H')
+hist = cv2.calcHist([hsv_img], [1], None, [256], [0,256])
+plt.plot(hist, label='S')
+hist = cv2.calcHist([hsv_img], [2], None, [256], [0,256])
+plt.plot(hist, label='V')
+plt.grid()
+plt.legend()
+plt.show()
+
+cv2.waitKey(0)
+cv2.destroyAllWindows()