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A new algorithm for clipping a line segment in two dimension against a rectangular window is presented in this paper. The algorithm are different to the others of line clipping algorithms. This algorithm use the affine transformations (Shearing transformations) to transform the line segment and the window, which make the process of clipping the line segment very simple and avoid solving the equations...
This paper proposes a 3D model authenticate algorithm. Tamper detection, tamper localization and recovery can be achieved. The tamper detection is achieved by fragile watermarking under a precision limit. The tamper localization is achieved by partitioning the model into several authentication units (AU). The robust features are chosen since they are invariant after watermark embedding. Data is embedded...
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