红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2015年
1期
48-52
,共5页
微扫描%红外超分辨成像%像素有效形状
微掃描%紅外超分辨成像%像素有效形狀
미소묘%홍외초분변성상%상소유효형상
microscanning%infrared super-resolution imaging%pixel active area shape
超分辨成像是基于过采样来降低频率混叠、提高图像分辨率的技术，而像素有效形状是超分辨相关研究的重要对象。基于实际的红外焦平面阵型提出了“Z”形有效形状模型，并分析了常用的方形模型和“Z”形模型分别得到调制传递函数(MTF)的差别。还提出了形状边界到中心点的差值越小，其得到的MTF越大的假设，通过对不同形状模型的MTF推导分析和数值模拟，其结果证实了这一假设。数值模拟结果还表明圆形模型具有最大的MTF值。上述结论对未来的红外焦平面阵型设计与生产具有参考意义。
超分辨成像是基于過採樣來降低頻率混疊、提高圖像分辨率的技術，而像素有效形狀是超分辨相關研究的重要對象。基于實際的紅外焦平麵陣型提齣瞭“Z”形有效形狀模型，併分析瞭常用的方形模型和“Z”形模型分彆得到調製傳遞函數(MTF)的差彆。還提齣瞭形狀邊界到中心點的差值越小，其得到的MTF越大的假設，通過對不同形狀模型的MTF推導分析和數值模擬，其結果證實瞭這一假設。數值模擬結果還錶明圓形模型具有最大的MTF值。上述結論對未來的紅外焦平麵陣型設計與生產具有參攷意義。
초분변성상시기우과채양래강저빈솔혼첩、제고도상분변솔적기술，이상소유효형상시초분변상관연구적중요대상。기우실제적홍외초평면진형제출료“Z”형유효형상모형，병분석료상용적방형모형화“Z”형모형분별득도조제전체함수(MTF)적차별。환제출료형상변계도중심점적차치월소，기득도적MTF월대적가설，통과대불동형상모형적MTF추도분석화수치모의，기결과증실료저일가설。수치모의결과환표명원형모형구유최대적MTF치。상술결론대미래적홍외초평면진형설계여생산구유삼고의의。
Super- resolution (SR) imaging is a technology based on oversampling to reduce the aliasing and increase the image resolution. Pixel active area (PAA) model is essential in SR related research. The difference of MTF with the widely used square model and the “Z” shape model we proposed was calculated to simulate the practical infrared focal plane array (IRFPA) production. The cause of the difference was analyzed. Furthermore, a hypothesis was proposed, which the smaller the difference between the closest and the farthest distances from the PAA boundaries to the pixel center, the greater the MTF of IRFPA will be. Different PAA shapes were discussed and the MTFs of these shapes were calculated. The calculation results verify the hypothesis we proposed. These results also show that the circle PAA is the most ideal model and it should be used as a reference for IR FPA design.
