import cv2
 
# 讀取圖片并縮放方便顯示
img = cv2.imread('D:/6.jpg')
height, width = img.shape[:2]
size = (int(width * 0.2), int(height * 0.2))
# 縮放
img = cv2.resize(img, size, interpolation=cv2.INTER_AREA)
 
# BGR轉化為HSV
HSV = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
 
# 鼠標點擊響應事件
def getposHsv(event, x, y, flags, param):
 if event==cv2.EVENT_LBUTTONDOWN:
  print("HSV is", HSV[y, x])
 
def getposBgr(event, x, y, flags, param):
 if event==cv2.EVENT_LBUTTONDOWN:
  print("Bgr is", img[y, x])
 
cv2.imshow("imageHSV", HSV)
cv2.imshow('image', img)
cv2.setMouseCallback("imageHSV", getposHsv)
cv2.setMouseCallback("image", getposBgr)
cv2.waitKey(0)

  # -*- coding:utf-8 -*-
  import cv2
  
  img = cv2.imread('11_13/120002.jpg')
  gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
  hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
  
  def mouse_click(event, x, y, flags, para):
    if event == cv2.EVENT_LBUTTONDOWN: # 左邊鼠標點擊
      print('PIX:', x, y)
      print("BGR:", img[y, x])
      print("GRAY:", gray[y, x])
      print("HSV:", hsv[y, x])
  
  if __name__ == '__main__':
    cv2.namedWindow("img")
    cv2.setMouseCallback("img", mouse_click)
    while True:
      cv2.imshow('img', img)
      if cv2.waitKey() == ord('q'):
        break
    cv2.destroyAllWindows()