成组技术与生产现代化
成組技術與生產現代化
성조기술여생산현대화
Group Technology & Production Modernization
2015年
3期
5-11
,共7页
散焦图像%点扩散函数%调制传递函数%图像复原
散焦圖像%點擴散函數%調製傳遞函數%圖像複原
산초도상%점확산함수%조제전체함수%도상복원
defocus image%point spread function%modula-tion transfer function%image restoration
针对已知的散焦图像数学模型,通过先估计点扩散函数( PSF) ,然后利用维纳滤波估计原始清晰图像的方法,探讨PSF、调制传递函数( MTF)的估计方法,具体包括边缘地物法、空间频率响应法、基于APEX方法的估计算法.结合复原图像的模糊度客观评价函数和主观视觉评价来判别各方法的优劣,结果表明:边缘地物法较优.
針對已知的散焦圖像數學模型,通過先估計點擴散函數( PSF) ,然後利用維納濾波估計原始清晰圖像的方法,探討PSF、調製傳遞函數( MTF)的估計方法,具體包括邊緣地物法、空間頻率響應法、基于APEX方法的估計算法.結閤複原圖像的模糊度客觀評價函數和主觀視覺評價來判彆各方法的優劣,結果錶明:邊緣地物法較優.
침대이지적산초도상수학모형,통과선고계점확산함수( PSF) ,연후이용유납려파고계원시청석도상적방법,탐토PSF、조제전체함수( MTF)적고계방법,구체포괄변연지물법、공간빈솔향응법、기우APEX방법적고계산법.결합복원도상적모호도객관평개함수화주관시각평개래판별각방법적우렬,결과표명:변연지물법교우.
For the known mathematical model of the defocus image, the method is used in the paper ,which includes PSF and Weiner filter to calculate the image in focus. In this paper, it is important to estimate the PSF or the equivalent MTF, which in-cludes the edge method, the spatial frequency method and the A-PEX method. Finally, the advantages and disadvantages of the above methods with the objective and subjective evaluation on blur level are compared. According to the results, the edge method is better.
