如何使用python从图像中提取文本或数字

Question

I want to extract text (mainly numbers) from images like this

I tried this code

import pytesseract
from PIL import Image

pytesseract.pytesseract.tesseract_cmd = r'C:\Program Files\Tesseract-OCR\tesseract.exe'
img = Image.open('1.jpg')
text = pytesseract.image_to_string(img, lang='eng')
print(text)

but all i get is this (hE PPAR)

Answer 1

When performing OCR, it is important to preprocess the image so the desired text to detect is in black with the background in white . To do this, here's a simple approach using OpenCV to Otsu's threshold the image which will result in a binary image. Here's the image after preprocessing:

We use the --psm 6 configuration setting to treat the image as a uniform block of text. Here's other configuration options you can try. Result from Pytesseract

01153521976

Code

import cv2
import pytesseract

pytesseract.pytesseract.tesseract_cmd = r"C:\Program Files\Tesseract-OCR\tesseract.exe"

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

data = pytesseract.image_to_string(thresh, lang='eng',config='--psm 6')
print(data)

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