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This paper presents a modified patchwork watermarking scheme for digital images by incorporating the Watson's perceptual model into the watermarking process. Watermarking occurs in the DCT domain. Watson's perceptual model provides a measure of distortions that each DCT coefficient can resist based on the human visual system (HVS). Perceptual information is incorporated into the watermarking scheme...
A new 3D depth image estimation algorithm for visual camera is proposed in this paper. One visual camera and one Time-of-flight camera are used in our method. First, we propose a novel calibration method for visual and Time-of-Flight camera, in which both the intensity image and depth image of Time-of Flight camera are taken into consideration. Then the initial depth map is generated by project depth...
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