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Toolbox/Libraries/PyTesseract.qmd

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@@ -32,6 +32,24 @@ Tesseract uses a character-level LSTM model and runs entirely on CPU, making it
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- Outputs plain text, bounding boxes, PDFs, TSV, and XML formats
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- Fast CPU-based inference with no GPU dependencies
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## When to use
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- You need fast OCR on clean documents or small image batches
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- You want to automate extraction from scanned forms, labels, or tables
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- You're working in a CPU-only or resource-constrained environment
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- You want a scriptable fallback tool before reaching for ViT-based OCR
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## Pros and limitations
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| Pros | Limitations |
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|------|-------------|
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| Easy to install and use on most systems | No GPU acceleration — slower on large datasets |
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| Multilingual out of the box | Cannot be fine-tuned or retrained |
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| Good for simple forms and documents | Struggles with complex layouts or visual context |
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| CPU-only — works in low-resource environments | Lower accuracy than transformer-based models on cluttered or noisy inputs |
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Tesseract's fast CPU performance and no-frills setup make it great for small-scale OCR, but it's not optimized for high-volume pipelines or scene text recognition.
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## Model architecture
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Tesseract relies on an LSTM pipeline trained on character-level text. It performs well when the input is clean and straightforward — such as scanned documents or forms — but struggles with visual ambiguity, clutter, or layout-sensitive content.
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Replace `"example.png"` with your own image file containing text. Pytesseract supports both in-memory images and file paths.
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## Pros and limitations
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| Pros | Limitations |
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|------|-------------|
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| Easy to install and use on most systems | No GPU acceleration — slower on large datasets |
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| Multilingual out of the box | Cannot be fine-tuned or retrained |
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| Good for simple forms and documents | Struggles with complex layouts or visual context |
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| CPU-only — works in low-resource environments | Lower accuracy than transformer-based models on cluttered or noisy inputs |
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Tesseract's fast CPU performance and no-frills setup make it great for small-scale OCR, but it's not optimized for high-volume pipelines or scene text recognition.
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## When to use
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- You need fast OCR on clean documents or small image batches
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- You want to automate extraction from scanned forms, labels, or tables
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- You're working in a CPU-only or resource-constrained environment
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- You want a scriptable fallback tool before reaching for ViT-based OCR
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## See also
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