Xiao Zhou - IEEE Xplore Author Profile

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Deep learning-based video watermarking is shown to be effective in improving robustness. However, existing methods neglect the enhancement of long-distance spatio-temporal features and the representation of the inter-frame difference and the intra-frame difference, which lead to poor robustness against H.264 compression and low compatibility with high-definition (HD) and full high-definition (FHD)...Show More
Image manipulation detection and localization (IMDL) aim to identify tampered regions from a suspicious image. Although existing works have achieved impressive results, they fail to capture sufficient tampering artifacts resulting in inaccurate localization of tampered regions. In addition, the problem of poor robustness to postprocessing methods also occurs frequently. To address these problems, ...Show More
Channel estimation is a challenging problem for space time block coding (STBC) multipleinput and multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems in dynamic environments. To handle this problem and improve the system performance, this paper proposes a Kalman filter (KF) based channel estimation method applied to 2 × 2 and 4 × 4 STBC MIMO-OFDM systems. The proposed met...Show More
Channel estimation is still a challenge for space time block coding (STBC) multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems in time-varying environments. To estimate the channel state information (CSI) precisely without increasing complexity in any significant way, this paper utilizes the sparsity and the inherent temporal correlation of the time-varyin...Show More
With the maturity of image editing software, image content has been forged frequently, posing potential threats to many critical fields. To detect forgery images effectively, this paper proposes an image copy-move forgery detection (CMFD) method based on speeded-up robust feature (SURF) and polar complex exponential transform (PCET). Firstly, image is divided into non-overlapping irregular image b...Show More
The existing watermarking algorithms in H.265/high efficiency video coding (HEVC) compressed domain cannot achieve intra-frame distortion drift-free and resist the recompression and signal processing attacks simultaneously. Therefore, the application of HEVC watermarking in copyright protection is limited in practice. To solve the problem, this paper proposes an intra-drift-free robust watermarkin...Show More
With the rampancy of pirated videos, video watermarking for copyright protection has become a widely researched topic. In this paper, zero-watermarking is applied to videos for the first time to resist high efficiency video coding compression, which can improve the robustness of the watermarking algorithm and ensure the videos’ quality. A robust video zero-watermarking algorithm based on the discr...Show More
To enhance the compression ratio of color still image compression, this paper proposes an efficient lossy image compression algorithm using a new efficient lossless encoder. Firstly, the pre-processing, including mean removing and YCbCr transform, is applied to image. Then, this paper applies discrete cosine transform (DCT) to reduce spatial correlation and concentrate the energy of the image. An ...Show More
Orthogonal frequency division multiplexing (OFDM) has been widely used in modern wireless communication systems. In OFDM system, channel estimation is a key technology to improve the system performance. However, most conventional channel estimation methods cannot suppress the noise effectively, which affects the quality of the final received OFDM signals. To solve this problem, this paper utilizes...Show More
Orthogonal frequency division multiplexing (OFDM) has been widely used in modern wireless communication systems. In OFDM scheme, channel estimation method is a key technology in improving the accuracy of the channel estimation and the system performance. There are many channel estimation methods in OFDM system. The least square (LS) channel estimation method is relatively simple but it is suscepti...Show More
With the development of digital imaging technique, the demosaicking algorithm becomes a hot spot in the field of image processing. An efficient interpolation method with good visual quality and less calculation amount is urgently needed. In this paper, an improved linear interpolation for demosaicking of Bayer-patterned color filter array (CFA) images is proposed. Compared with bilinear interpolat...Show More
In this paper, an improved digital watermarking scheme combined with multi-level discrete cosine transform (DCT), discrete wavelet transform (DWT), and singular value decomposition (SVD) is proposed. To improve the security of the watermark, the encrypted watermark is acquired by Arnold transform before watermark embedding. The proposed scheme is proved to be robust, and its performance is evaluat...Show More