To achieve image compression with an optical wavelet transform method,we investigated the effects methods of image realization and image capture in an optical 4f system on the spatial frequency characteristics,and studied the characteristics of image energy concentration in the frequency domain of optical 4f system.

Research on the amplitude-frequency characteristic of wavelet transform;

Application of Mulitsim7 in active filter circuit amplitude-frequency characteristic test;

A method for amplitude-frequency characteristic compensation of signal generator based on pseudo interleaving

Pressure fluctuation frequency characteristics in spout- fluid bed based on ARM power spectrum analysis;

Study on methods for analyzing frequency characteristics of shaking table systems;

Frequency Characteristics Instrument for Electro-Hydraulic Servo Valves;

The optimized high-frequency expanding technique can basically possess of seismic data original SNR,relative amplitude relation and time-frequency characteristics during the resolution improving.

Application of Formula Node in the measurement of frequency characteristic;

Design of Frequency Characteristic Testing Meter Based on LabVIEW;

The Frequency Characteristic Testing Meter Based on Single Chip Microcomputer;