MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541122903 A) filed by Vellore Institute Of Technology, Vellore, Tamil Nadu, on Dec. 5, 2025, for 'secure medical image verification system using dct-based steganography.'
Inventor(s) include Dr. Vetriselvi T; Saniel Bhattarai; and Riya Vaid.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure provides a secure medical image verification system comprising a DCT-based steganography module configured to embed patient identification metadata into medical images by applying discrete cosine transform and modifying DCT coefficients, and a verification module configured to extract embedded patient identification metadata and authenticate patient identifiers by comparing extracted identifiers with claimed identifiers. The steganography module converts medical images from BGR to YCrCb color space, extracts luminance channel, divides into 8 8 pixel blocks, applies two-dimensional DCT to generate coefficients, calculates adaptive embedding strength based on local variance and texture masking, selects embedding positions using perceptual masking criteria, embeds patient identification bits through sign-based coefficient modification, and reconstructs images through inverse DCT operations. The verification module performs extraction by converting stego-images to YCrCb color space, applying DCT to blocks, reading coefficient signs at embedding positions, and reconstructing embedded patient identifiers for authentication."
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