我可以让 pytesseract 命令在引发错误的 pycharm 中正常工作吗

Question

我正在定义一个函数，它将图像转换为灰度（有点黑白色），然后我将它传递给：

text = pytesseract.image_to_string(Image.open(gray_scale_image))

然后我打印我收到的文本，但它抛出错误：

Traceback (most recent call last):
  File "C:\Users\HP\PycharmProjects\nayaproject\venv\lib\site-packages\PIL\Image.py", line 2613, in open
fp.seek(0)
AttributeError: 'numpy.ndarray' object has no attribute 'seek'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/HP/PycharmProjects/nayaproject/new.py", line 17, in <module>
text = pytesseract.image_to_string(Image.open(g))
  File "C:\Users\HP\PycharmProjects\nayaproject\venv\lib\site-packages\PIL\Image.py", line 2615, in open
fp = io.BytesIO(fp.read())
AttributeError: 'numpy.ndarray' object has no attribute 'read'

当我使用 Image.fromarray(grayscale) 而不是 Image.open(grayscale) 时，我得到了这些错误：

Traceback (most recent call last):
  File "C:\Users\HP\PycharmProjects\nayaproject\venv\lib\site-packages\pytesseract\pytesseract.py", line 170, in run_tesseract
proc = subprocess.Popen(cmd_args, **subprocess_args())
  File "C:\Users\HP\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 709, in __init__
restore_signals, start_new_session)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 997, in _execute_child
startupinfo)

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/HP/PycharmProjects/nayaproject/new.py", line 17, in <module>
text = pytesseract.image_to_string(Image.fromarray(g))
  File "C:\Users\HP\PycharmProjects\nayaproject\venv\lib\site-packages\pytesseract\pytesseract.py", line 294, in image_to_string
return run_and_get_output(*args)
  File "C:\Users\HP\PycharmProjects\nayaproject\venv\lib\site-packages\pytesseract\pytesseract.py", line 202, in run_and_get_output
run_tesseract(**kwargs)
  File "C:\Users\HP\PycharmProjects\nayaproject\venv\lib\site-packages\pytesseract\pytesseract.py", line 172, in run_tesseract
raise TesseractNotFoundError()
pytesseract.pytesseract.TesseractNotFoundError: tesseract is not installed or it's not in your path

我正在研究 PyCharm，我已经为这个项目安装了 Pillow、numpy、opencv-python、pip 和 pytesseract。

Answer 1

因为我猜 gray_scale_image 是 OpenCV 的输出，因此是错误提示的 numpy 数组

AttributeError: 'numpy.ndarray' object has no attribute 'read'

您需要将数组转换为 PIL 对象。根据我自己的经验，我建议您自动将 numpy 数组转换为 np.uint8，因为 PIL 使用 8bit，您通常不了解 OpenCV 算法的内容。

text = pytesseract.image_to_string(Image.fromarray(gray_scale_image.astype(np.uint8)))

如果上述方法不起作用，则绝对不要传递任何形式的 Image 数组。尝试输入这些来查找argument的字符：

print(type(gray_scale_image))
print(gray_scale_image.shape)

这将解决您的第一个问题之后，将会出现您还不知道的新问题。您需要为您的 pytesseract 添加路径

pytesseract.pytesseract.TesseractNotFoundError: tesseract is not installed or it's not in your path

解决方案是在开头添加路径

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