Getting error while processing the pdf as per the instruction given

[maestrosuper80]

Below is the log trace

%%python pdf-to-csv-cv.py -p test.pdf

Traceback (most recent call last):
File "pdf-to-csv-cv.py", line 213, in
process_file(file_name)
File "pdf-to-csv-cv.py", line 37, in process_file
extracted_table = extract_main_table(gray_image)
File "pdf-to-csv-cv.py", line 70, in extract_main_table
cnts = sorted(cnts, key=cv2.contourArea, reverse=True)
cv2.error: OpenCV(4.1.1) C:\projects\opencv-python\opencv\modules\imgproc\src\shapedescr.cpp:274: error: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function 'cv::contourArea'

Traceback (most recent call last):

File "", line 1, in
get_ipython().run_cell_magic('python', 'pdf-to-csv-cv.py -p test.pdf', '\n')

File "C:\ProgramData\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2358, in run_cell_magic
result = fn(*args, **kwargs)

File "C:\ProgramData\Anaconda3\lib\site-packages\IPython\core\magics\script.py", line 142, in named_script_magic
return self.shebang(line, cell)

File "<C:\ProgramData\Anaconda3\lib\site-packages\decorator.py:decorator-gen-111>", line 2, in shebang

File "C:\ProgramData\Anaconda3\lib\site-packages\IPython\core\magic.py", line 187, in
call = lambda f, *a, **k: f(*a, **k)

File "C:\ProgramData\Anaconda3\lib\site-packages\IPython\core\magics\script.py", line 245, in shebang
raise CalledProcessError(p.returncode, cell, output=out, stderr=err)

CalledProcessError: Command 'b'\n'' returned non-zero exit status 1.

Please help to solve the issue

[vitali84]

@maestrosuper80, Im afraid Opencv API was changed between 3.4.4 (version this script was developed on)
and 4.1.1 you are using

[veabanga]

How can we solve this error?