This paper presents a hybrid optical-digital image analysis system (HODIAS), performing function of power spectrum sampling, optimal feature selection and classification. The results of experiments on two kinds of oce...This paper presents a hybrid optical-digital image analysis system (HODIAS), performing function of power spectrum sampling, optimal feature selection and classification. The results of experiments on two kinds of ocean wave heights with 0.1-m difference are satisfactory, The system may extend to multl-height automated measurement.展开更多
The conventional optical system design employs combinations of different lenses to combat aberrations, which usually leads to considerable volume and weight. In this Letter, a tailored design scheme that exploits stat...The conventional optical system design employs combinations of different lenses to combat aberrations, which usually leads to considerable volume and weight. In this Letter, a tailored design scheme that exploits state-of-the-art digital aberration correction algorithms in addition to traditional optics design is investigated. In particular, the proposed method is applied to the design of refractive telescopes by shifting the burden of correcting chromatic aberrations to software. By enforcing cross-channel information transfer in a post-processing step, the uncorrected chromatic aberrations are well-mitigated. Accordingly, a telescope of F-8, 1400 mm focal length, and 0.14° field of view is designed with only two lens elements. The image quality of the designed telescope is evaluated by comparing it to the equivalent designs with multiple lenses in a traditional optical design manner, which validates the effectiveness of our design scheme.展开更多
文摘This paper presents a hybrid optical-digital image analysis system (HODIAS), performing function of power spectrum sampling, optimal feature selection and classification. The results of experiments on two kinds of ocean wave heights with 0.1-m difference are satisfactory, The system may extend to multl-height automated measurement.
基金supported by the Joint Foundation Program of the Chinese Academy of Sciences for Equipment Pre-Feasibility Study(No.6141A01011601)the National Natural Science Foundation of China(Nos.61775219 and61640422)the Equipment Research Program of the Chinese Academy of Sciences(No.Y70X25A1HY)
文摘The conventional optical system design employs combinations of different lenses to combat aberrations, which usually leads to considerable volume and weight. In this Letter, a tailored design scheme that exploits state-of-the-art digital aberration correction algorithms in addition to traditional optics design is investigated. In particular, the proposed method is applied to the design of refractive telescopes by shifting the burden of correcting chromatic aberrations to software. By enforcing cross-channel information transfer in a post-processing step, the uncorrected chromatic aberrations are well-mitigated. Accordingly, a telescope of F-8, 1400 mm focal length, and 0.14° field of view is designed with only two lens elements. The image quality of the designed telescope is evaluated by comparing it to the equivalent designs with multiple lenses in a traditional optical design manner, which validates the effectiveness of our design scheme.
