Three-dimensional model watermark embedding method based on wavelet domain particle swarm

Abstract

The invention discloses a three-dimensional model watermark embedding method based on a wavelet domain particle swarm, which relates to the technical field of multimedia data processing protection, and comprises the following steps: carrying out dimensionality reduction on a three-dimensional model to obtain feature points of the three-dimensional model after dimensionality reduction, generating a matrix by combining the feature points, embedding a watermark into an intermediate frequency region of the matrix, and adjusting the embedding depth to obtain a three-dimensional model containing the watermark; and carrying out robustness calculation evaluation on the three-dimensional model containing the watermark image, and determining watermark information of the three-dimensional model. Through the technical scheme of the invention, the embedded watermark can resist geometric attacks of translation, rotation and scaling, the watermark is embedded by using multiple wavelets, the intermediate frequency is adaptively selected to embed the watermark according to the quality, and a robust watermarking method for ensuring the completeness and safety of medical data is provided.

Description

technical field [0001] The invention relates to the technical field of multimedia data processing and protection, in particular to a three-dimensional model watermark embedding method based on wavelet domain particle swarms. Background technique [0002] With the advancement of science and technology and the rapid development of network technology, digital medical data storage makes remote medical diagnosis possible. In the remote medical diagnosis system, 2D images are being replaced by more intuitive and specific 3D models. 3D models play a key role as the most direct and authoritative medical certificate. Doctors can judge the lesion area more clearly by rotating and zooming the model, so Its accuracy directly affects the doctor's diagnosis of the disease. However, in the current intricate network era, even a small degree of distortion in the process of medical data transmission and storage may affect doctors' diagnosis of patients' conditions, resulting in serious conse...

AI Technical Summary

Problems solved by technology

However, in the current complex network era, even a small degree of distortion in the process of medical data transmission and storage may affect the doctor's diagnosis of the patient's condition, resulting in serious consequences

[0003] As a new information hiding technology, digital watermarking embeds watermarking information into digital media to protect the original carrier image. Through a certain watermarking algorithm, watermarking information is embedded into medical data to prevent it from being stolen during transmission and storage. Tampering, protecting the legitimate rights and interests of doctors and patients, in order to prevent criminals from gaining benefits or people with ulterior motives from forging or tampering, how to ensure the integrity, accuracy and security of medical data is a key issue facing medical institutions at present, but in In the existing digital watermark embedding technology, the embedding process of the watermark usually causes great changes to the 3D model, affects the original structure of the 3D model, causes data loss in the 3D model, and reduces the visible effect of the 3D model.

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