How Tamil Optical Character Recognition (OCR) Works
Optical Character Recognition (OCR) is an artificial intelligence technology that analyzes visual patterns in scanned images, digital photos, or book scans and converts pixel shapes into editable digital text.
Recognizing Tamil script presents unique OCR challenges compared to Latin alphabets due to the presence of 247 combined characters (உயிர்மெய் எழுத்துக்கள்), complex vowel modifiers, pulli dots (புள்ளி), and Grantha loan characters. Our Tamil OCR engine uses deep neural networks trained specifically on modern and classical Tamil typography to deliver high recognition accuracy.
Best Practices for High OCR Recognition Accuracy
1. Image Resolution (300 DPI)
Ensure scanned documents are crisp and scanned at 300 DPI or higher. Blurry or pixelated photos reduce glyph recognition accuracy.
2. High Contrast Lighting
Use dark text on clean white backgrounds. Avoid harsh shadows, camera glare, or dark colored background paper.
3. Upright Page Orientation
Ensure the image is rotated right-side up. Text rotated at 90 degrees or upside down will fail optical character alignment.
4. Clean Crop & Alignment
Crop out unnecessary background borders, desk surfaces, or fingers holding down book pages before uploading.
Supported Document Types & Formats
Our Tamil OCR engine supports all standard digital image file extensions up to 10 MB per file:
| Format | Description | Recommended Use |
|---|---|---|
| PNG / WEBP | Lossless compressed images & screenshots | Best for crisp web screenshots & mobile captures |
| JPG / JPEG | Standard digital camera photos | Good for smartphone camera photos of printed books |
| Scanned PDF Pages | Multi-page scanned documents | Convert PDF pages to PNG/JPG before uploading |