出现错误:cv2.error: OpenCV(4.5.4) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
源代码:import cv2import numpy as np#读取图像img = cv2.imread('cat1.jpg')#显示原图cv2.imshow('src', img)#获取图像信息imgInfo = img.shapeheight= imgInfo[0]width = imgInfo[1]deep = imgInfo[2]#初始化目标矩阵dst = np.zeros([height, width2, deep], np.uint8)#对原图像的像素点逐点计算for i in range( height ): for j in range( width ): #原图 dst[i,j] = img[i,j] #镜像图部分 dst[i,width2-j-1] = img[i,j]#在原图、镜像图的中间画分割线--绿色for i in range(height): dst[i,width] = (0, 255, 0) #显示目标图像 cv2.imshow('image', dst)cv2.waitKey(0)cv2.destroyAllWindows()