航空光电侦察图像质量影响因素分析

Image quality influencing factors for aerial electro-optical detection

从航空光电侦察系统的实际需求,首先图像信息的角度研究图像质量优劣的定性和定量因素,提出一种基于相似特征区域提取的图像清晰度评价方法,使得图像清晰度的主观感受与客观评价相匹配。其次从成像系统的光学评价角度分析影响成像质量的光学传递函数、像差、透过率等因素及其相互关系,然后依据多波段长焦反射式光学系统进行试验结果验证。最后,结合工程实践提升成像质量的要求,指出光学成像系统研制中应重点关注的几个方面,并针对多波段长焦反射式光学系统,给出具体参数建议。

For the actual demands of the aerial electro-optical detection system,firstly,the qualitative and quantitative factors for evaluating the optical image quality were analyzed from the perspective of image information,an image definition evaluation method based on similar feature region extraction was proposed to achieve the matching between the subjective feeling and objective evaluation of the image definition.Then,from the perspective of the optical evaluation of imaging system,the optical transfer function,aberration,transmittance and other factors affecting the imaging quality were analyzed,and according to the multi-band long focal reflective optical system,the experimental results were verified.Finally,combined with the requirements for engineering practice to improve the imaging quality,several aspects that should be given more attention in the development of optical imaging system were pointed out.And for the multi-band long focal reflective optical system,some specific parameter suggestions were given.