Text Detection Models - Vision - GCP - Azure - Tesseract

 GCP - Link

Azure

Tesseract Results

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Document Q&A

From OCR, Document Extraction, Understanding, Hugging face has come a long way :)

DocQnA Pipeline very impressive

Results

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• TesserOCR
• MMOCR
• OCRmypdf
• EasyOCR
• PaddleOCR
• Kraken
• OCRopus
• PyOCR
• Tesseract

OCR, Fintech and Usecase

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Good Utils - Json Analysis, PDF Parsing, OCR

• Visualize json and responses - jsoncrack.com 
• Analyze pdf documents -pdfplumber
• Parsr - Turn your documents into data!

Hope to leverage them in NLP work

Text and Table Extraction

Test Detectron2 , DiT, Layout Parser for Document Images

DiT: Self-Supervised Pre-Training for Document Image Transformer

Invoice Processing with Azure OCR and GPT-4: An In Depth Step-by-Step Guide

Extracting Data from Charts and Graphs: The OCR Challenge Solution

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OCR again - 2022 Updates

Donut 🍩, Document understanding transformer, is a new method of document understanding that utilizes an OCR

• Based on the transformer concept
• Experimented with the sample colab code
• Gradio is like streamlit 

Samples and Results

Demo codes Link

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Interesting observations tesseract

While extracting digits from analog meters below two links we use to get the values

Lesson #1 - Setting the path to a folder vs complete executable, Minor thing took a while since not using it often

Ref - Link

Lesson #2 - Very useful for different situations on how it can be interpreted, 11 worked best. 6 was ok

Ref - Link

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Day #114 - OCR with Tesseract

Architecture for Tesseract link

Step 1 - Download Latest version for windows link

Step 2 - Pdf to Image Conversion using ImageMagik (Refer Previous Posts)

convert.exe -density 300 -trim D:\OCR\TestData\DEC17.pdf -quality 100 D:\OCR\TestData\DEC17.jpg

convert.exe -density 300 -trim D:\OCR\TestData\DEC17.pdf -quality 60 D:\OCR\TestData\DEC17.jpg

Step 3 - Tesseract Options using LSTM Networks

#use LSTM Mode
tesseract.exe --oem 2 D:\OCR\TestData\DEC17-0.jpg D:\OCR\TestData\DEC171.csv

tesseract.exe --oem 2 D:\OCR\TestData\DEC17-0.jpg D:\OCR\TestData\ tsv

Intelligent Photo OCR that reads better than you (Or not)
Deep Learning Fun - Crazy Food Image Classifier
OCR and OpenCV with RNN

Ready-to-use OCR with 40+ languages supported including Chinese, Japanese, Korean and Thai.
Build your own OCR(Optical Character Recognition) for free
An OCR System for recognition of Urdu text in Nastaliq Font
Optical Character Recognition

• Image Thresholding
• Contour formation
• Detecting individual characters and forming a Region of Image (ROI) around detected characters.
• Passing the ROIs through our trained model and finding out the predicted character
• Saving/Appending this character in a string, which is basically going to be your output.

Happy Learning!!!

Day #109 - PDF to JPG Conversion

• ImageMagick-6.9.9-Q16 (https://legacy.imagemagick.org/script/binary-releases.php)
• Python 3.5 Environment on Anaconda and OCR followed as steps listed in https://sqlandsiva.blogspot.in/2018/03/day-101-ocr-and-python.html

Steps Goto - C:\Program Files\ImageMagick-6.9.9-Q16> in Administrator Mode

Different command line options to translate into jpeg with sharpening, density values

• convert.exe -density 300 -trim D:\PetProject\OCR\pdfs\TestA.pdf -quality 100 D:\PetProject\OCR\pdfs\Pages\test.jpg
• convert.exe -density 300 -trim D:\PetProject\OCR\pdfs\TestA.pdf -quality 100 -sharpen 0x1.0 D:\PetProject\OCR\pdfs\Pages\test.jpg
• convert.exe -density 150 -trim D:\PetProject\OCR\pdfs\TestA.pdf -quality 100 -sharpen 0x1.0 D:\PetProject\OCR\pdfs\Pages\test.jpg

Happy Learning!!!

Day#108 - OCR for Hindi

OCR for Hindi

1. Download data from https://github.com/tesseract-ocr/tessdata/blob/3.04.00/hin.traineddata

2. Copy it to C:\opencv\Tesseract-OCR\tessdata/hin.traineddata

3. Test Data

3. Output

Code

More Reads - Link, Link1

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Day #101 - OCR and Python

pytesseract installation steps

1. Download for windows https://github.com/tesseract-ocr/tesseract/wiki/4.0-with-LSTM#400-alpha-for-windows
2. Installed - Windows Installer made with MinGW-w64 from UB Mannheim
3. This post was useful - https://stackoverflow.com/questions/34225927/pytesseract-cannot-find-the-file-specified
4. Pip install of pytesseract
5. Created Env Variable - TESSDATA_PREFIX=C:\Program Files (x86)\Tesseract-OCR

More Reads
RNN for OCR

Happy Learning!!!