Extracting fields from a form involves detecting and recognizing the text regions. Start by preprocessing the form image using OpenCV functions like thresholding, binarization, and noise removal.
Use text detection models like EAST or OpenCV’s cv2.findContours to locate text areas. Once detected, apply OCR tools like Tesseract to extract the text. For structured forms, use template matching or field-specific bounding boxes to extract data accurately.
Postprocess the OCR results with validation rules (e.g., regex patterns for phone numbers) to ensure accuracy. Combining these methods creates an automated pipeline for form processing.