-215：断言失败

如何解决-215：断言失败

我正在使用附加的代码，但出现以下错误：

第 21 行，在 pick_color 中 image_mask = cv2.inRange（image_hsv，下，上） cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/core/src/arithm.cpp:1799: error: (-215:Assertion Failed) lb.type() = = ub.type() 在函数 'inRange'

import cv2
import numpy as np

image_hsv = None   # global ;(
pixel = (20,60,80) # some stupid default

# mouse callback function
def pick_color(event,x,y,flags,param):
    if event == cv2.EVENT_LBUTTONDOWN:
        pixel = image_hsv [y,x]
        lower = np.array([],dtype=np.uint8)
        upper = np.array([],dtype=np.uint8)

        #you might want to adjust the ranges(+-10,etc):
        #upper =  np.array([pixel[0] + 10,pixel[1] + 10,pixel[2] + 40])
        #lower =  np.array([pixel[0] - 10,pixel[1] - 10,pixel[2] - 40])
        upper =  np.array([pixel[0] + 10,pixel[2] + 40])
        lower =  np.array([pixel[0],pixel[1],pixel[2]])
        print (type(lower),type(upper))
        image_mask = cv2.inRange(image_hsv,lower,upper)
        cv2.imshow("mask",image_mask)

def main(image_to_be_read):
    import sys
    global image_hsv,pixel # so we can use it in mouse callback

    image_src = cv2.imread(image_to_be_read)  # pick.py my.png
    image_hsv = cv2.cvtColor(image_src,cv2.COLOR_BGR2HSV)
    if image_src is None:
        print ("the image read is None............")
        return
    cv2.imshow("bgr",image_src)

    ## NEW ##
    cv2.namedWindow('hsv')
    cv2.setMouseCallback('hsv',pick_color)

    # Now click into the hsv img,and look at values:
    image_hsv = cv2.cvtColor(image_src,cv2.COLOR_BGR2HSV)
    cv2.imshow("hsv",image_hsv)

    cv2.waitKey(0)
    cv2.destroyAllWindows()

if __name__=='__main__':
    image_name = '/home/carlos/pic/TEST_IMAGES/Test_1_R/DJI_0150_R.jpg'
    main(image_name)