Create blog11-image01.py

eastmountyxz · web-flow · commit 02f3fc041af8 · 2019-10-17T22:19:13.000+08:00
diff --git a/blog11-hist/blog11-image01.py b/blog11-hist/blog11-image01.py
@@ -0,0 +1,19 @@
+#encoding:utf-8
+import cv2  
+import numpy as np
+import matplotlib.pyplot as plt
+
+src = cv2.imread('Lena.png')
+
+histb = cv2.calcHist([src], [0], None, [256], [0,255])
+histg = cv2.calcHist([src], [1], None, [256], [0,255])
+histr = cv2.calcHist([src], [2], None, [256], [0,255])
+
+cv2.imshow("src", src)
+cv2.waitKey(0)
+cv2.destroyAllWindows()
+
+plt.plot(histb, color='b')
+plt.plot(histg, color='g')
+plt.plot(histr, color='r')
+plt.show()
