Method for laser disturbing image quality evaluation based on wavelet weight and correlation

Abstract

ABSTRACT The advantages and disadvantages of conventional image quality evaluation met hods are analyzed and according to the characteristics of laser disturbing image, an image quality evaluation method which is based on wavelet weight and correlation is established. In the method, both the original and di sturbed images are processed by wavelet decomposition, replacement and reconstruction. Then different sub-band images are obtained and their correlations are calculated. Combined with band-pass characteristic of human vision, visual weighted coefficients are obtained and objective calculation results are output finally. Experimental results show that this method not only can overcome the influences of different conditions on evaluation of laser disturbing effect, but it is also in good agreement with the subjective method. Keywords : laser disturbing, image quality, wavelet transform, visual weighted, correlation 1. INTRODUCTION With the characteristics of small volume, light weight, high sensitivity and resolution, CCD has been widely used in many fields such as reconnaissance, guidance, identification and so on. However, CCD can be easily disturbed or damaged when it is illuminated by laser. As a result, how to evaluate laser disturbing effect reasonably has become a problem which is required to be solved. Recently, there are just a few evaluation me thods on laser disturbing effect in litera ture references and many researches are just aimed at different profiles