我正在使用pytesseract，pillow，cv 2来OCR图像并获取图像中的文本。由于我的输入是扫描的PDF文档，我首先将其转换为图像（JPEG）格式，然后尝试提取文本。我只完成了一半。输入是一个表格，标题没有显示，因为标题有一个黑色的背景。我也试过getstructuringelement，但无法找出一个方法。这是我所做的，直到现在-

import cv2
import os  
import numpy as np 
import pytesseract
#import pillow 

#Since scanned PDF can't be handled by pdf2image, convert the scanned PDF into a JPEG format using the below code- 
filename = path   
from pdf2image import convert_from_path 
pages = convert_from_path(filename, 500) for page in pages:
page.save("dest", 'JPEG')

imgname = "path" 
oriimg = cv2.imread(imgname,cv2.IMREAD_COLOR) 
cv2.imshow("original image", oriimg)
cv2.waitKey(0)

#img = cv2.resize(oriimg,None,fx=0.5,fy=0.5,interpolation=cv2.INTER_CUBIC) 
img = cv2.resize(oriimg,(700,1500),interpolation=cv2.INTER_AREA) 
#here length height  
cv2.imshow("lol", img) 
cv2.waitKey(0) 
cv2.imwrite("changed_dimensionsimgpath", img)

import PIL.Image  
image = cv2.imread(imgname,cv2.IMREAD_COLOR) 
grayedimg = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) grayedimg = 
cv2.threshold(grayedimg, 0, 255, cv2.THRESH_BINARY | cv2.THRESH_OTSU)[1] 
cv2.imwrite("H://newim.jpg", grayedimg)

pytesseract.pytesseract.tesseract_cmd = r"C:\Program Files (x86)\Tesseract- 
OCR\tesseract.exe"

text = pytesseract.image_to_string(PIL.Image.open("path"))
print(text)

我的输入表如下所示。黑色背景的区域没有被OCR识别，也没有被提取为文本。任何帮助都将非常感谢。x1c 0d1x
输出此代码的图像样本-

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