How to Preprocess Images for Text OCR in Python (OCR in Python Tutorials 02.02)

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How to Open an Image with OpenCV: 4:10
01. Invert an Image: 9:47
03: Binarization: 13:33
04: Noise Reduction: 20:40
05: Dilation and Erosion: 28:33
06: Rotation and Deskewing: 35:07
07: Removing Borders: 42:18
08: Missing Borders: 49:09

If there's a specific video you would like to see or a tutorial series, let me know in the comments and I will try and make it.

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[Superdooperhero]

Doing all the steps finally got me to 98% accuracy. Thanks so much!

[sabririhab]

i can't believe i found this amazing channel !!! I've been working on an OCR mobile app to extract fields from scanned invoices and these videos are exactly what I m looking for million thanks man !!!

[marcerum]

What a legend only one ad in the beginning . Your so damn underrated

[ds]

Hey thank you so much! The video is about an hour long, so I’m really happy that your voice is so pleasant and happy to listen to! This video helped me a lot on my project.

[jadenizard]

This is awesome ! Really helpful for my dissertation research about OCR in the accountability field. Many thanks from Paris !

[zvynlyb]

Hi!, First thank for the tutorial. In my case I had a problem while correcting the rotated image with the function. In the link it gives you a really cool solution, if anyone had the problem just comment the line of the angle and put this lines instead and it will work perfectly.

middleContour = contours[len(contours) // 2]
angle =


As I said it comes in the link given but this is in the case you're in a rush.

Thanks for the channel and the videos for real. I would have liked to have teachers like you while I was studying!!!!

[Superdooperhero]

Inverting took me from garbage to great recognition. Thanks!

[sriyaniliyanage]

Thank you so much. I just upgraded from Making Waves, so the concepts are familiar, but tNice tutorials is a whole new world! Look forward to

[balkiprasanna]

Amazing, I am going to recommend to my colleagues. Great work.

[Superdooperhero]

from numpy import ones, uint8
kernel = ones((1, 1), uint8)
is a lot faster than importing the entire numpy module

[saifabusrour]

I appreciate your step-by-step explanations

[theorager]

Hey, any idea why I got "ValueError: not enough values to unpack (expected 3, got 2)" at 15:43. I'm using Python3.8.2 and open-cv 4.5.1.

Also, please check patron messages.
Thanks!

[musinguzibenard]

Great thanks from Uganda the pearl of Africa

[FernandoFischer]

Men you are an amazing teacher! I love the way you explain things! thank you BTW!

[sinantk]

found actually helpful for people started from scratch

[prasannaimmaneni]

I'm unable to acces the notebook. Can you please share the notebook.

[tieman]

Good video. not completely relevant for my case as i dont know what the image will look like, but still usefull!

[mat]

For anyonne getting a error message when importing pylot. heres a few solutions:

1. Instalation problem. error in python-slugify setup command: use_2to3 - solution: update your setup tools in the terminal with the comand "setuptools==58". Then try "pip install pylot"

2. Error in import - solution: change comand to "import matplotlib.pyplot as plt"

[JasonVerro]

Thanks for the video. I was having issues with the "getSkewAngle" function.
I found an easy workaround though.

I changed the last line

"return -1.0 * angle"

to just

"return angle"

Hope this helps anyone else with this problem.

[xewwpyu]

Are the functions you built only suitable for this specific document? Or will they be able to handle new input documents?