发光学报Issue(12)：1506-1510,5.DOI:10.3788/fgxb20143512.1506
ICF微靶装配体图像清晰度评价方法
Image Definition Evaluation Method of ICF Micro-target Assembly
摘要
Abstract
During the process of evaluating ICF micro-target image with the current image definition evaluation function, owing to the changes in image contrast of different components of micro-target, the evaluation function may lose its ideal curve characteristics easily. This may not only result in the decrease of focus accuracy but also, in some cases, the failure of the entire focusing process. Based on the analysis of the causes for the blurring defocused image, we discovered that the primary reason for defocused image was structural distortion. With the characteristic of Zernike moment of descri-bing the image structure in mind, we propose a new function for evaluating the image definition of micro-target. The new evaluation function is consisted of Zernike moments weighting of different steps, and it is realized through the evaluation of image contrast for micro-targets of different defini-tions by regulating the weight coefficient. We confirm that the new evaluation function maintains the ideal curve characteristics during the process of evaluating the micro-target images compared to the current evaluation function. In the condition of low contrast, however, the new approach holds a distinct advantage in terms of sensitivity and noise immunity.关键词
ICF微靶装配体/图像清晰度评价函数/对比度/Zernike矩Key words
ICF micro-target/image definition evaluation function/contrast/Zernike moment分类
信息技术与安全科学引用本文复制引用
聂凯,刘文耀,王晋疆..ICF微靶装配体图像清晰度评价方法[J].发光学报,2014,(12):1506-1510,5.基金项目
基金项目:国家863计划(2008AA0948)资助项目 （2008AA0948）
