Privacy protection in surveillance systems based on JPEG DCT baseline compression and spectral domain watermarking

Thomas Sablik; Jörg Velten; Anton Kummert

doi:10.1117/12.2178764

4 March 2015 Privacy protection in surveillance systems based on JPEG DCT baseline compression and spectral domain watermarking

Thomas Sablik, Jörg Velten, Anton Kummert

Author Affiliations +

Proceedings Volume 9443, Sixth International Conference on Graphic and Image Processing (ICGIP 2014); 94432U (2015) https://doi.org/10.1117/12.2178764
Event: Sixth International Conference on Graphic and Image Processing (ICGIP 2014), 2014, Beijing, China

Abstract

An novel system for automatic privacy protection in digital media based on spectral domain watermarking and JPEG compression is described in the present paper. In a first step private areas are detected. Therefore a detection method is presented. The implemented method uses Haar cascades to detects faces. Integral images are used to speed up calculations and the detection. Multiple detections of one face are combined. Succeeding steps comprise embedding the data into the image as part of JPEG compression using spectral domain methods and protecting the area of privacy. The embedding process is integrated into and adapted to JPEG compression. A Spread Spectrum Watermarking method is used to embed the size and position of the private areas into the cover image. Different methods for embedding regarding their robustness are compared. Moreover the performance of the method concerning tampered images is presented.

Citation Download Citation

Thomas Sablik, Jörg Velten, and Anton Kummert "Privacy protection in surveillance systems based on JPEG DCT baseline compression and spectral domain watermarking", Proc. SPIE 9443, Sixth International Conference on Graphic and Image Processing (ICGIP 2014), 94432U (4 March 2015); https://doi.org/10.1117/12.2178764

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