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Identifying inter-frame forgery is a hot topic in video forensics. In this paper, we propose a method based on the assumption that the optical flows are consistent in an original video, while in forgeries the consistency will be destroyed. We first extract optical flow from frames of videos and then calculate the optical flow consistency after normalization(More)
Impact spinal cord injury (20 g-cm) was induced in rat by weight drop. The immunoreactivity of mcalpain was examined in the lesion and adjacent areas of the cord following trauma. Increased calpain immunoreactivity was evident in the lesion compared to control and the immunostaining intensity progressively increased after injury. The calpain(More)
Identifying inter-frame forgery is a hot topic in video forensics. In this paper, we propose a method based on the assumption that the correlation coefficients of gray values is consistent in an original video, while in forgeries the consistency will be destroyed. We first extract the consistency of correlation coefficients of gray values (CCCoGV for short)(More)
Two essential benefits, the resistance to the counterfeiting attack and the tamper localization accuracy, of the fragile watermarking methods are mutually restricted. In this paper, a novel distributed block-dependent watermarking method is proposed to gain both benefits by inserting the block watermark into other chosen blocks. Further, the proposed method(More)
Scenes are closely related to the kinds of objects that may appear in them. Objects are widely used as features for scene categorization. On the other hand, landscapes with more spatial structures of scenes are representative of scene categories. In this paper, we propose a deep learning based algorithm for scene categorization. Specifically, we design(More)
This paper proposes a chaos-based model for generating the watermark which depends on the host data. By using the chaos-based model, a semi-fragile watermarking technique that accepts JPEG lossy compression on the watermarked image is developed. Numerical simulations based on the proposed method employing logistic map are presented. Experimental results(More)