Title :
New de-noising method for laser active image based on wavelet transform
Author :
Xu, Jun ; Xu, Yibin ; Luo, Jijun ; Ning, Xiaolei ; Zhao, Falin ; Li, Xiaofeng
Author_Institution :
Xi´´an Res. Inst. of High-Technol., Xi´´an, China
Abstract :
In this paper, an image de-noising method is presented based on wavelet transform and median filter. According to the respective characteristics, high frequency sub-band images at horizontal, vertical and angular directions were denoised by three different filter templates after wavelet transform. We take measures to protect edge information and details of image. Experiment results show that the noise of the image is removed effectively. At the same time, the detail of the image is kept well. The method has better de-noising effect.
Keywords :
image denoising; median filters; optical images; wavelet transforms; angular direction; edge information; filter templates; high-frequency sub-band image; horizontal direction; image denoising method; laser active image; median filter; vertical direction; wavelet transform; Active noise reduction; Discrete wavelet transforms; Filters; Gaussian noise; Image denoising; Laser noise; Noise reduction; Optical imaging; Signal to noise ratio; Wavelet transforms; Image de-noising; active imaging; mean filter; median filter; wavelet transform;
Conference_Titel :
Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3863-1
Electronic_ISBN :
978-1-4244-3864-8
DOI :
10.1109/ICEMI.2009.5274126
