CAJ | 학술논문

首先分析了引起CCD非均匀性的原因，将其归纳为两个方面，一为因制作工艺、材料、偏置等因素引起的空间噪声，二为CCD响应特性随时间的漂移而引起的时间噪声，两者的共同作用将严重影响CCD的测量性能。为了能够定量描述空间噪声和时间噪声对CCD产生非均匀性的影响，文中基于CCD光电响应曲线呈线性状态这一假设建立了CCD光电响应的数学模型，然后在该模型的基础上提出了利用最小二乘法来估计校正系数，从而消除CCD的非均匀性，实验证明该算法是有效的。
수선분석료인기CCD비균균성적원인，장기귀납위량개방면，일위인제작공예、재료、편치등인소인기적공간조성，이위CCD향응특성수시간적표이이인기적시간조성，량자적공동작용장엄중영향CCD적측량성능。위료능구정량묘술공간조성화시간조성대CCD산생비균균성적영향，문중기우CCD광전향응곡선정선성상태저일가설건립료CCD광전향응적수학모형，연후재해모형적기출상제출료이용최소이승법래고계교정계수，종이소제CCD적비균균성，실험증명해산법시유효적。
The reason of photo response non-uniformity (PRNU) of image sensor′s photo response was analyzed in this paper at first. It was concluded in two faces, one caused by spatial noise which based on materials, manufacture crafts and offset and another caused by temporal noise which based on its response with time drift, theses two factors influence the PRNU of image sensor′s photo response gravely. To describe the affection of spatial noise and temporal noise, the model of sensor based on the hypothesis that linear of image sensor′s photo response was made, and the erase non-uniformity of CCD by Least Square Methods based on this model was proposed. Experiment results show that the proposed algorithm is effective to the correction of image sensor′s PRNU.