MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202531116892 A) filed by Indian Institute Of Technology, Kharagpur, West Bengal, on Nov. 25, 2025, for 'counting and classification of punched holes in sheets using computer vision.'
Inventor(s) include Mr. Avishek Mukherjee; Mr. Rishabh Swarnkar; Dr. Ananta Dutta; Mr. Souvik Karmakar; Mr. Gaddam Kranthikumar; and Prof Surjya K Pal.
The application for the patent was published on Feb. 27, under issue no. 09/2026.
According to the abstract released by the Intellectual Property India: "A computer-vision-based inspection system is presented for real-time counting and classification of punched holes in sheets. The system employs a line-scanner camera that streams high-resolution frames to a processing unit configured through IP communication. An analyzer algorithm detects sheet presence by monitoring pixel-density changes and initiates or terminates recording accordingly, storing background frames for subtraction when no sheet is present. A non-neural image-processing pipeline then performs background subtraction, contour detection, hole validation, and diameter estimation using combined area-based and circle-fitting methods. Sheet edges are extracted to compute hole coordinates and convert pixel measurements to physical units after calibration. Additional filtering removes spurious detections, while a tracking module ensures frame-to-frame continuity and assigns unique identifiers to each hole to avoid duplication. The system outputs hole counts, diameter-based classifications, positional data, annotated imagery, and structured datasets, achieving complete analysis within two seconds without any pre-trained model."
Disclaimer: Curated by HT Syndication.
