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In order to enhance the contrast between ridges and valleys of contactless fingerprint, a touchless fingerprint image enhancement algorithm based on Hessian matrix and short time Fourier transform (STFT) analysis is proposed. First, initial enhancement is done through building lower
Watermarking is an important technical way to realize copyright protection of intellectual property. The traditional video watermarking can cause distortion to host video in a certain extent, and has a weak robustness against strong geometric attacks. Firstly, a Nonnegative Matrix Factorization with Sparseness Constraints on Parts (NMFSCP) method is proposed in this paper. Secondly, the NMFSCP is...
In recent years, machine vision technology has been widely used in production. The scanners of the three-dimensional scanning technology are too expensive to promotion. A new height measurement method of irregular objects is proposed in this paper. Firstly, the color and depth images of objects are collected by using Kinect, then the images collected are needed to preprocessed. The height matrix is...
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