无法使用 python、Tesseract 和 opencv 从图像中获取数字

Question

i have to get numbers from a water-meter image usign python tesseract and opencv. I have tried to change the --psm but it's doesn't work.

Here the image without modification:

enter image description here

Here the outpout image:

enter image description here

I need your help guys, i'm starting python and i'm already blocked:'(

My code:

from PIL import Image
import pytesseract
import cv2
import numpy as np
import urllib
import requests
pytesseract.pytesseract.tesseract_cmd = r'C:\Users\Hymed\AppData\Local\Tesseract-OCR\tesseract.exe'

col = Image.open("pts.jpg")
gray = col.convert('L')
bw = gray.point(lambda x: 0 if x<128 else 255, '1')
bw.save("cp19.png")


image = cv2.imread('cp19.png')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
thresh = 255 - cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1]

# Blur and perform text extraction
thresh = cv2.GaussianBlur(thresh, (3,3), 0)
img1 = np.array(thresh)
data = pytesseract.image_to_string(img1, config='--psm 11 digits')
print(data)

cv2.imshow('thresh', thresh)
cv2.waitKey()

Answer 1

You have nearly finished the task.

I use the divide operation, after the GaussianBlur .

div = cv2.divide(gray, thresh, scale=192)

Result:

When I read from the image:

data = pytesseract.image_to_string(div, config='--psm 11 digits')
print(data)

Result:

00000161

Code: (Just added div = cv2.divide(gray, thresh, scale=192) rest are your code)

from PIL import Image
import pytesseract
import cv2
import numpy as np

col = Image.open("TOaEW.jpg")
gray = col.convert('L')
bw = gray.point(lambda x: 0 if x < 128 else 255, '1')
bw.save("cp19.png")

image = cv2.imread('cp19.png')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
thresh = 255 - cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1]

# Blur and perform text extraction
thresh = cv2.GaussianBlur(thresh, (3, 3), 0)

div = cv2.divide(gray, thresh, scale=192)  # added

data = pytesseract.image_to_string(div, config='--psm 11 digits')
print(data)

Answer 2

I tried to read the number from an image using Tesseract. Except the numbers shown in the first line, it also returned an unidentified symbol in the second line. I don't understand what I did wrong. Here is the code and the results code and output

This is the image I extracted the number from: Image used for number extraction