OCR_preprocessing_tool
A simple OCR preprocessing tool using Python with a GUI.
This repo is modified from https://github.com/insaneyilin/document_scanner, and note_shrink.py is modified from https://github.com/mzucker/noteshrink.
Usage
-
GUI - image rotation, binarization, edge detection, dilation/erosion, automatic/manual doc scanner, color inversion, and pdf to png conversion:
python OCR_preprocessing_tool.py -
Command Line - automatic doc scanner:
python doc_scanner_app.py --image=<input_image_path> -
Command Line - text compressing and enhancing:
python note_shrink.py IMAGE <input_image_path>Run the code below for more tips:
python note_shrink.py -h
Dependencies
- Python 3
- Tkinter
- OpenCV
- Pillow
- NumPy
- Scipy
- pdf2image
pip install -r requirements.txt
Demo
Rotation
Binarization
Edge detection
Erosion
Dilation
Select corners manually
Auto detection (not very robust)
Text enhancement (after applying perspective transform)
Conversion of pdf to png
References
https://github.com/insaneyilin/document_scanner
https://github.com/mzucker/noteshrink
http://www.pyimagesearch.com/2014/09/01/build-kick-ass-mobile-document-scanner-just-5-minutes/
https://www.geeksforgeeks.org/convert-pdf-to-image-using-python/
https://www.geeksforgeeks.org/how-to-hide-recover-and-delete-tkinter-widgets/
http://vipulsharma20.blogspot.com/2016/01/document-scanner-using-python-opencv.html