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数码相机整机成像均匀度的自动检测方法 被引量:2
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作者 段欣涛 汪岳峰 +2 位作者 张强 殷智勇 贾文武 《光学仪器》 2010年第5期15-18,共4页
为了保证数码照相机的成像质量,现提出一种数码相机(DSC)整机成像均匀度的检测方法。首先讨论了数码相机成像平面成像均匀度的影响因素,然后用待测数码相机拍摄均匀目标板,利用计算机采集数码相机成像图片,用MatLab工具箱提取图像各元... 为了保证数码照相机的成像质量,现提出一种数码相机(DSC)整机成像均匀度的检测方法。首先讨论了数码相机成像平面成像均匀度的影响因素,然后用待测数码相机拍摄均匀目标板,利用计算机采集数码相机成像图片,用MatLab工具箱提取图像各元素点的三元色R、G、B值及L(亮度)值,并编程计算相应的标准偏差,从而得出被测数码相机的成像均匀度。该结果与JB/T10362—2002标准中的相应指标比对,从而判断被测数码相机整机成像均匀度的合格情况,为数码相机成像性能的评价提供客观定量的依据。 展开更多
关键词 数码相机 成像均匀度 自动检测
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Differences in thermal effects of moxibustion at Zusanli(ST 36) and Hegu(LI 4) on various facial areas in healthy people 被引量:13
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作者 Yiling Yang Laixi Ji +3 位作者 Gaobo Li Xiufang Deng Peisi Cai Ling Guan 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2012年第3期397-403,共7页
OBJECTIVE:To study the effects of temperature on different facial areas by suspended moxibustion at two points,Zusanli(ST 36) and Hegu(LI 4),and probe the phenomena underlying self-regulation in the human body after t... OBJECTIVE:To study the effects of temperature on different facial areas by suspended moxibustion at two points,Zusanli(ST 36) and Hegu(LI 4),and probe the phenomena underlying self-regulation in the human body after thermal stimulation.METHODS:Thirty healthy volunteers accepted moxibustion over Zusanli(ST 36) and Hegu(LI 4),and the order of moxibustion points was randomly determined.Moxibustion method:suspension of moxibustion over Zusanli(ST 36) and Hegu(LI 4) on both sides was performed using an ignited moxa stick stuck in a support for 20 min.Observation method:An infrared thermal image of the face was taken before and after suspended moxibustion using a CK350 medical infrared thermal imaging instrument.Data analysis:A thermal microscopic section view system(TMTSys) was used to analyze the change in temperature in special facial areas.Statistical analysis was carried out using SPSS 14.0 software.RESULTS:Before moxibustion was suspended,the facial thermal image showed a T-shaped thermal area related to the vascular distribution with even temperature and good symmetry on both sides.Suspended moxibustion over Zusanli(ST 36) have a very significant increase in temperature at the forehead,around the nose,at the corners of the mouth,and at the cheeks and lips(P<0.01).Suspended moxibustion over Hegu(LI 4) also have a significant(P<0.05) increase in temperature around the nose,the corners of the mouth,the cheeks,and lips,where has a new high temperature area was formed(P<0.01).Suspended moxibustion over Hegu(LI 4) raised the temperature at the middle point of the lips more obviously than did Zusanli(ST 36) in the same person,(P<0.05).After 10 min of moxibustion over Zusanli(ST 36) and Hegu(LI 4),the change in temperature in the facial area reached its peak value.CONCLUSIONS:Facial infrared thermography of healthy people revealed a T-shaped thermal area reflecting a physiological thermal area.Moxibustion over Zusanli(ST 36) or Hegu(LI 4) raised the temperature in this facial T-shaped thermal area.Hegu(LI 4) led to the formation of a new thermal area in the lips.The time required for moxibustion to regulate human body temperature was 10 min. 展开更多
关键词 MOXIBUSTION Point ST 36(Zusanli) Point LI 4(Hegu) Infrared thermal image
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