TypeError：需要一个 integer（获取类型元组）<python><opencv><tesseract></tesseract></opencv></python>

Question

I am trying to do a text recognition on invoices.

import pytesseract
from pytesseract import Output
import cv2

pytesseract.pytesseract.tesseract_cmd = 'C:/Program Files/Tesseract-OCR/tesseract.exe'

img = cv2.imread('bill_copy.jpg')
d = pytesseract.image_to_data(img, output_type=Output.DICT)
n_boxes = len(d['level'])
for i in range(n_boxes):
    (x, y, w, h) = (d['left'], d['top'], d['width'], d['height'])
    img = cv2.rectangle(img, (x, y), (x + w, y + h), (0, 0, 255), 2)

cv2.imshow(img, 'img')

When i run it, i get enter image description here

Answer 1

The parameter of x, y, w, h is an array of every divided character, But in the loop it draws the rectangle one by one.

So you need to send an integer for those parameter(x, y, w, h) every loop.

And there is plenty of error in your code. The right code should be like that:

import pytesseract
from pytesseract import Output
import cv2

pytesseract.pytesseract.tesseract_cmd = r'C:/Program Files/Tesseract-OCR/tesseract.exe'

img = cv2.imread('bill_copy.jpg')
d = pytesseract.image_to_data(img, output_type=Output.DICT)
n_boxes = len(d['level'])
(x, y, w, h) = (d['left'], d['top'], d['width'], d['height'])

for i in range(n_boxes):
    img = cv2.rectangle(img, (x[i], y[i]), (x[i] + w[i], y[i] + h[i]), (0, 0, 255), 2)

cv2.imshow('img',img)
cv2.waitKey(0)

Answer 2

The problem in your code is in the following statement:

(x, y, w, h) = (d['left'], d['top'], d['width'], d['height'])

You need to get ith value of each region

(x, y, w, h) = (d['left'][i], d['top'][i], d['width'][i], d['height'][i])

The problem should be solved