MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202621077129 A) filed by Dr. Rajul Jain; Dr. Manupreet Kaur; Dr. Shailendra Kumar Sahu; Dr. Anurag Dani; Rujhil Jain; Dr. Mahkeet Kaur Bhatia; and Dr. Purva Bute on June 22, 2026, for A Digital Approach For The Selection Of Shade Of Teeth.
Inventors include Dr. Rajul Jain; Dr. Manupreet Kaur; Dr. Shailendra Kumar Sahu; Dr. Anurag Dani; Rujhil Jain; Dr. Mahkeet Kaur Bhatia; and Dr. Purva Bute.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: [06] This study proposes a low-cost web-based system for tooth shade selection using a two-stage workflow. Value is assessed first from a grayscale image containing the tooth and three candidate shade tabs, followed by hue and chroma refinement using a second color image. The platform includes virtual 18% gray neutralisation, brightness and contrast adjustment, CIELAB analysis, shade ranking, and report generation. Synthetic testing on 12,000 cases achieved an 84.58% top-three value inclusion rate and improved exact agreement from 40.58% to 65.97% with full two-stage matching. The main novelty is software-based gray neutralisation without requiring a physical gray card. Clinical validation against a dental spectrophotometer and standardized photography is required before deployment. Accompanied Drawing [FIG. 1] [FIG. 2] [FIG. 3] [FIG. 4] [FIG. 5] [FIG. 6] [FIG. 7] [FIG. 8] [FIG. 9] [FIG. 10]
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