dlib

Dlib is a general-purpose library that includes machine learning and image processing modules, particularly excelling in face recognition and object detection. It comes with built-in facial landmark detectors and classifiers, ideal for security systems and human-computer interaction.

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OpenCV

OpenCV is a powerful open-source computer vision library with rich algorithms for image and video processing, such as edge detection, object recognition, and feature extraction. It's widely used in machine vision, robotics, autonomous driving, and augmented reality. Its Python interface is especially popular for fast prototyping and development.

Pillow

Pillow is a modern fork of the Python Imaging Library (PIL), used for basic image manipulation like opening, editing, and saving various formats. It supports tasks such as cropping, resizing, and applying filters, making it an essential tool for image preprocessing.

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pytesseract

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EasyOCR

EasyOCR is a deep learning-based OCR library supporting over 80 languages. It excels at recognizing text in unstructured images using CNN and CTC decoding techniques, performing well even with complex backgrounds or skewed text. Ideal for multilingual and industrial inspection applications.

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Keras-OCR is an end-to-end OCR toolkit based on Keras/TensorFlow, including both text detection and recognition stages. It uses pre-trained models for inference and works well on natural scene images like street signs and product packaging. Suitable for educational and research purposes.