如何使用python直接从屏幕读取文本

问题描述

我想构建一个项目，从我的电脑屏幕的一部分连续读取文本并将它们显示在 pycharm 的控制台上

我使用的是 python 3，所有模块都是从 pycharm 控制台使用 pip 安装的。

我使用了这个代码：

import time
import cv2
import mss
import numpy
import PyTesseract


mon = {'top': 0,'left': 0,'width': 150,'height': 150}

with mss.mss() as sct:
    while True:
        im = numpy.asarray(sct.grab(mon))
        # im = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)

        text = PyTesseract.image_to_string(im)
        print(text)

        cv2.imshow('Image',im)

        # Press "q" to quit
        if cv2.waitKey(25) & 0xFF == ord('q'):
            cv2.destroyAllWindows()
            break

        # One screenshot per second
        time.sleep(1)

遇到我无法处理的错误：

C:\Users\ali91\PycharmProjects\OCR\venv\Scripts\python.exe
"C:/Users/ali91/PycharmProjects/OCR/lesson 1.py" Traceback (most
recent call last):   File
"C:\Users\ali91\PycharmProjects\OCR\venv\lib\site-packages\PyTesseract\PyTesseract.py",line 252,in run_tesseract
    proc = subprocess.Popen(cmd_args,**subprocess_args())   File "C:\Program Files\python39\lib\subprocess.py",line 947,in __init__
    self._execute_child(args,executable,preexec_fn,close_fds,File "C:\Program Files\python39\lib\subprocess.py",line 1416,in
_execute_child
    hp,ht,pid,tid = _winapi.CreateProcess(executable,args,FileNotFoundError: [WinError 2] The system cannot find the file
specified

During handling of the above exception,another exception occurred:

Traceback (most recent call last):   File
"C:\Users\ali91\PycharmProjects\OCR\lesson 1.py",line 15,in <module>
    text = PyTesseract.image_to_string(im)   File "C:\Users\ali91\PycharmProjects\OCR\venv\lib\site-packages\PyTesseract\PyTesseract.py",line 413,in image_to_string
    return {   File "C:\Users\ali91\PycharmProjects\OCR\venv\lib\site-packages\PyTesseract\PyTesseract.py",line 416,in <lambda>
    Output.STRING: lambda: run_and_get_output(*args),File "C:\Users\ali91\PycharmProjects\OCR\venv\lib\site-packages\PyTesseract\PyTesseract.py",line 284,in run_and_get_output
    run_tesseract(**kwargs)   File "C:\Users\ali91\PycharmProjects\OCR\venv\lib\site-packages\PyTesseract\PyTesseract.py",line 256,in run_tesseract
    raise TesseractNotFoundError() PyTesseract.PyTesseract.TesseractNotFoundError: tesseract is not
installed or it's not in your PATH. See README file for more
information.

解决方法

通过以下方式验证您是否已正确安装 pytesseract（全局或虚拟环境） pip install pytesserect
在您的 PATH 中添加 pytesseract 变量/可执行文件以在您的项目位置使用它：

对于全局安装：

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

对于虚拟环境安装：

pytesseract.pytesseract.tesseract_cmd = 'LOCATION_TO_VENV\Tesseract-OCR\tesseract.exe'

将 USER 替换为您计算机的用户名，并将 LOCATION_TO_VENV 替换为您的虚拟环境的绝对位置。

opencv-python python python-mss python-tesseract