PIL - TypeError：src不是一个numpy数组，也不是标量

Question

from PIL import Image
import pytesseract
import argparse
import cv2
import os

image  = Image.open("C:/Users/NB/Desktop/Scan/Arti818.jpg")

#image = "C:/Users/NB/Desktop/Scan/Arti818.jpg"
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

# check to see if we should apply thresholding to preprocess the
# image

gray = cv2.threshold(gray, 0, 255,  cv2.THRESH_BINARY | cv2.THRESH_OTSU)[1]

# make a check to see if median blurring should be done to remove
# noise

# write the grayscale image to disk as a temporary file so we can
# apply OCR to it
filename = "{}.png".format(os.getpid())
cv2.imwrite(filename, gray)
# load the image as a PIL/Pillow image, apply OCR, and then delete
# the temporary file
text = pytesseract.image_to_string(Image.open(filename))
os.remove(filename)
print(text)

# show the output images
cv2.imshow("Image", image)
cv2.imshow("Output", gray)
cv2.waitKey(0)

这是我的代码，我收到以下错误：

gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
TypeError: src is not a numpy array, neither a scalar

Answer 1

Read the docs。它清楚地说：

  

PIL。Image。open（fp, mode='r'）

     

打开并识别给定的图像文件   返回：Image对象。

返回的对象属于Image类型，而不是numpy.ndarray。如果您想要一个数组，请将image转换为一个：

gray = cv2.cvtColor(np.asarray(image), cv2.COLOR_BGR2GRAY)