Python3制作鼠标拾色器并显示十六进制数值（有单独窗口显示取色）

Python3制作鼠标拾色器并显示十六进制数值（有单独窗口显示取色）

代码如下，结合OpenCV的鼠标事件，窗体大小的调整，我们可以轻松地制作拾色器并进行显示：

import cv2
 
import numpy as np
 
def onmouse_pick_points(event, x, y, flag,img):
    img_bg = np.zeros((100,100), dtype=np.uint8)
    img_bg = cv2.cvtColor(img_bg, cv2.COLOR_GRAY2BGR)
    if event == cv2.EVENT_LBUTTONDOWN:
        print(img.shape)
        #x = x - 51 #坐标矫正
        #y = y - 44
        x,y = y,x
        print('x = %d, y = %d' % (x, y))
        print('b = %d, g = %d ,r = %d' % (img[x,y,0], img[x,y,1],img[x,y,2]))
        print(rgb2hex(img[x,y]))
        img_bg[:,:,0]=img[x,y,0]
        img_bg[:,:,1]=img[x,y,1]
        img_bg[:,:,2]=img[x,y,2]
        cv2.imshow('background',img_bg)
        cv2.waitKey(0)
 
def rgb2hex(RGB):
    text = '#' + ''.join([hex(i)[-2:].replace('x', '0') for i in list(map(int, RGB))])
    return text
 
img = cv2.imread("G:\\videos\\mofang.jpeg")
 
#img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
 
WIN_NAME = 'pick_points'
cv2.namedWindow(WIN_NAME,cv2.WINDOW_AUTOSIZE)
cv2.setMouseCallback(WIN_NAME, onmouse_pick_points, img)
cv2.resizeWindow("pick_points",img.shape[1],img.shape[0])
while True:
    cv2.imshow(WIN_NAME, img)
    key = cv2.waitKey(30)
    if key == 27:  # ESC
        break
cv2.destroyAllWindows()

效果如下：

 如有疑问请留言———————————————————————————————》》》》