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A new measurement method for contrast sensitivity and color difference threshold characteristics of human eyes 一种新的人眼对比敏感度和色差阈值特性测量方法
Twelfth International Conference on Information Optics and Photonics Pub Date : 2021-11-01 DOI: 10.1117/12.2604189
Jiyan Zhang, Lei Yang, Wenli Liu, Mingliang Gao
{"title":"A new measurement method for contrast sensitivity and color difference threshold characteristics of human eyes","authors":"Jiyan Zhang, Lei Yang, Wenli Liu, Mingliang Gao","doi":"10.1117/12.2604189","DOIUrl":"https://doi.org/10.1117/12.2604189","url":null,"abstract":"Contrast sensitivity and color difference threshold are two important parameters of human visual characteristics, which are directly related to people's life and work. Based on optical modulation technology, a new method to measure visual threshold characteristics of human eyes is proposed. By using specially made modulators and integrating sphere system, a measurement device is developed which can realize multi-parameter measurement with psychophysical method, such as contrast sensitivity and color difference threshold. By the metrological control, the measurement values can be traceable to the existing luminance and color standards. Experiments show that the device can generate required test targets with different brightness, color, spatial frequency and contrast, and realize the visual threshold measurement well. Moreover, with the advantage of adjustable test target, simulation of different scenes and large measurement range, the device can meet needs of personalized measurements in many fields.","PeriodicalId":117641,"journal":{"name":"Twelfth International Conference on Information Optics and Photonics","volume":"398 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132283956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Front Matter: Volume 12057 封面:卷12057
Twelfth International Conference on Information Optics and Photonics Pub Date : 2021-11-01 DOI: 10.1117/12.2622251
{"title":"Front Matter: Volume 12057","authors":"","doi":"10.1117/12.2622251","DOIUrl":"https://doi.org/10.1117/12.2622251","url":null,"abstract":"","PeriodicalId":117641,"journal":{"name":"Twelfth International Conference on Information Optics and Photonics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124407544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave photonic based high-resolution ISAR imaging system for high-speed target 基于微波光子的高速目标高分辨率ISAR成像系统
Twelfth International Conference on Information Optics and Photonics Pub Date : 2021-11-01 DOI: 10.1117/12.2606216
Zheng Zhu, Shaowen Peng, Yirong Xu, Xiao-kun Zheng
{"title":"Microwave photonic based high-resolution ISAR imaging system for high-speed target","authors":"Zheng Zhu, Shaowen Peng, Yirong Xu, Xiao-kun Zheng","doi":"10.1117/12.2606216","DOIUrl":"https://doi.org/10.1117/12.2606216","url":null,"abstract":"Some flying objects have high velocity between 10 to 20 Mach, causing extra Doppler dispersion in wideband LFM signal which will deteriorate the ISAR imaging resolution and quality. Also, the detection and imaging of such high-speed objects demands highly on the real-time performance of imaging compensation algorithm. This paper presents a microwave photonic based radar and its compensation algorithm by using digital signal processing. Experiments obtain a clear and high-resolution ISAR image of the high-speed target with velocity of 15Mach. The image has the resolution of 3.12cm*19.12cm, and it just needs 0.30 seconds to do the ISAR imaging.","PeriodicalId":117641,"journal":{"name":"Twelfth International Conference on Information Optics and Photonics","volume":"885 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131673107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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