Class 2 颜色过滤，只保留蓝色

Class002/pcvc002.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+# coding=utf-8
+"""
+Python OpenCV Class 002
+"""
+
+import cv2
+import numpy as np
+
+CAP = cv2.VideoCapture(0)
+
+# 设置蓝色阈值
+LOWER_BLUE = np.array([78, 43, 46])
+UPPER_BLUE = np.array([110, 255, 255])
+
+while 1:
+    # 获取一帧图像并且显示
+    RET, FRAME = CAP.read()
+    cv2.imshow('Capture', FRAME)
+    FRAME = cv2.GaussianBlur(FRAME, (5, 5), 1.5) 
+    cv2.imshow('Gaussian', FRAME)
+
+    # 切换到 HSV 模式
+    HSV = cv2.cvtColor(FRAME, cv2.COLOR_BGR2HSV)
+
+    # 获取 Mask
+    MASK = cv2.inRange(HSV, LOWER_BLUE, UPPER_BLUE)
+    cv2.imshow('Mask', MASK)
+
+    # Mask
+    RES = cv2.bitwise_and(FRAME, FRAME, mask=MASK)
+    cv2.imshow('Result', RES)
+
+    if cv2.waitKey(1) & 0xFF == ord('q'):
+        break
+
+CAP.release()
+cv2.destroyAllWindows()