YUV domain digital watermarking algorithm based on wavelet transform

CN119515653AActive Publication Date: 2025-02-25HOWAY TECH (WUHAN) CO LTD
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Patent Information

Application Number
CN202411477025.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2025-02-25
Estimated Expiration
2044-10-22

AI Technical Summary

Technical Problem

When the prior art embeds digital watermarks in the YUV domain, the load is low and the image quality is not high. The characteristics of the Y, U and V channels are not fully considered, and the robustness is insufficient, making it difficult to maintain high accuracy under the strong noise transmission channel.

Method used

Using the YUV domain digital watermark algorithm based on wavelet transformation, through two-stage wavelet transformation, only 2-line buffers and addition and subtraction shift operations are required, which is relatively low. For the visual characteristics of YUV, different intensity curves are designed to embed watermarks on the YUV three channels to improve image quality and load capacity, and merge channels after wavelet inverse transformation to improve robustness.

Benefits of technology

It achieves high watermark image quality and load capacity, has high robustness, and can maintain high accuracy under strong noise transmission channels to meet higher load requirements.

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Abstract

The invention provides a YUV domain digital watermarking algorithm based on wavelet transform. The YUV domain digital watermarking algorithm comprises the following steps: separating an original image to obtain an embedded channel; carrying out two-stage wavelet transformation on the embedded channel; calculating a low-frequency-band pixel average value LL in the second-level low-frequency sub-band and the second-level low-frequency sub-band, and obtaining the intensity of the watermark embedded by the embedded channel according to the corresponding relation between the LL and the watermark intensity amplitude; embedding the watermark into the first secondary high-frequency sub-band to obtain a watermark-carrying secondary high-frequency sub-band; carrying out wavelet inverse transformation to obtain a watermark carrying channel; and combining the channels to obtain a watermark-carrying image. Two-stage wavelet transformation is adopted, only two rows of buffer areas and addition and subtraction shift operation are needed, and the cost is low. According to the visual characteristics of the YUV three channels, different intensity curves are designed for the YUV three channels, and better image quality can be obtained by embedding a watermark into any channel in the YUV. The load is high, and long information can be hidden. The robustness is high, and the accuracy is still high under a strong noise transmission channel.
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Citation Information

Patent Citations

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    CN102496135A

  • Blind watermark method in wavelet domain

    CN103413266A

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    CN109447889A

  • Watermark template generation method and device for embedding hidden digital watermark into image

    CN111445374A

  • High-robustness holographic blind watermarking algorithm based on improved Burch coding and data interval mapping

    CN112907435A