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## :brain: OCR-Based Text Extraction
This node takes **base64-encoded image data** from an upstream image node (e.g. screenshot, thresholded region, etc.) and uses a backend Python API to extract readable text using an OCR engine.
### :arrows_counterclockwise: Input and Timing Behavior
- The node listens for **new base64 images** from upstream.
- API calls are rate-limited using either:
- The **global Borealis update rate**, or
- A **custom rate (ms)** when enabled.
- API requests will only be sent **if both**:
- Enough time has passed based on the selected timer, **and**
- The image has changed enough based on the **Change Detection Sensitivity** setting (0100).
### :gear: OCR Processing
- OCR is handled by a **Python backend** using either:
- **TesseractOCR** (classic text engine)
- **EasyOCR** (neural networkbased engine)
- Both engines can run on **CPU or GPU**, based on your selection.
### :soap: Output Sanitization
- The text output can be filtered by:
- **Numerical Data** Only numbers, decimals, and `%`
- **String Data** Only alphabetic text
- **Mixed Data** Includes both numbers, letters, and symbols (default)
- Output is stored as a **multi-line array of strings** and displayed in a read-only text box.