Improve Spread Transform Dither Modulation by Using a Perceptual Model to Provide Resistance to Amplitude Scaling and Jpeg Compression
نویسندگان
چکیده
It is well known that Spread Transform Dither Modulation (STDM) is more robust to re-quantization such as JPEG compression than regular Quantization Index (QIM) does. However, STDM introduces relatively higher perceptual distortion and is quite sensitive to amplitude scaling, which is actually a quite common processing. In this paper, we propose algorithms to reduce perceptual distortion and to provide robustness against amplitude scaling. In doing that, perceptual fidelity is improved by introducing Watson’s model into the framework of STDM. Watson’s model is then modified to gain resistance to amplitude scaling.
منابع مشابه
Multiple Watermarking Algorithm Based on Spread Transform Dither Modulation
Multiple watermarking technique, embedding several watermarks in one carrier, has enabled many interesting applications. In this study, a novel multiple watermarking algorithm is proposed based on the spirit of spread transform dither modulation (STDM). It can embed multiple watermarks into the same region and the same transform domain of one image; meanwhile, the embedded watermarks can be ext...
متن کاملExhibition QIM-based watermarking for digital cinema
The copyright protection of Digital Cinema requires the insertion of forensic watermarks during exhibition playback. This paper presents a low-complexity exhibition watermarking method based on quantization index modulation (QIM) and embedded in the DCI compliant decoder. Watermark embedding is proposed to fit in the JPEG2000 decoding process, prior to the inverse wavelet transform and such as ...
متن کاملProvably robust digital watermarking
Copyright notification and enforcement, authentication, covert communication, and hybrid transmission are examples of emerging multimedia applications for digital watermarking methods, methods for embedding one signal (e.g., the digital watermark) within another “host” signal to form a third, “composite” signal. The embedding is designed to achieve efficient trade-offs among the three conflicti...
متن کاملSpread Spectrum Watermarking Using HVS Model and Wavelets in JPEG 2000 Compression
This paper presents the improvement of watermarking images by the joint use of the technique of spread spectrum (robustness) and a psycho visual mask pattern (imperceptibility) in the JPEG 2000 compression. Previous work had shown the benefit of using the technique of spread spectrum in the safety of the JPEG 2000 compression. After the wavelet decomposition of the image, the brand is inserted ...
متن کاملAn Angle QIM Watermarking in STDM Framework Robust against Amplitude Scaling Distortions
Quantization index modulation (QIM) watermarking proposed by Chen and Wornell provides computational efficient blind watermarking based on Costa’s dirty paper codes. The limitation of this is its vulnerability against amplitude scaling distortion. The present work is proposed to solve this problem based on angle QIM within spread transform dither modulation (STDM) framework. AQIM embeds the inf...
متن کامل