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Iris image quality is an important factor in an automatic iris recognition system, the recognition effectiveness would be influenced. A method of iris image quality evaluation is proposed based on gradation feature in this study, the defocus and motion blur are improved in the process of acquiring iris images. Iris location detection, iris visibility and iris definition are introduced in the research,...
Doppler radar real-time signal processing is one of the core equipment in the speed measuring system. The working principle is presented in this paper, and an efficient real sequence FFT algorithm is proposed based on the Fast Fourier Transform, which can reduce the computation complexity effectively. The design with low cost FPGA implementation, high performance, high flexibility, speed and other...
CCTV-based surveillance networks are widely used for security in public places. An important installation problem is to assign a camera schedule with which the system can choose which camera to record its video frames to storage at a certain time. Because of the resource constrained and bandwidth limitation, only a subset of raw video frames can be recorded for a camera. For security concerns, it...
PhotoPlethysmoGraphy(PPG) is a more important method in the current study of blood pressure measurement. And when PPG is used to measure the blood pressure, denoising and feature extraction are the two most important steps, which directly affects the results of the blood pressure measurement. Therefore, how to get more accurate denoise waveform and characteristic parameters is the key point of the...
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