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长春光学精密机械与物... [3]
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会议论文 [3]
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2011 [1]
2010 [1]
2009 [1]
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内容类型:会议论文
专题:长春光学精密机械与物理研究所
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Space camera dynamic image quality measurement and evaluation (EI CONFERENCE)
会议论文
3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China
Su W.
;
Zhang X.
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浏览/下载:15/0
  |  
提交时间:2013/03/25
By using analysis of the infinity image of the space camera
we intend to obtain the curve of the dynamic modulation transfer function. We extract the pixel gray values at the image edge which distribute as a knife-edge function
and make differential calculation and Fourier transformation of it
and then we can obtain the dynamic MTF curve of the optical system. The value of the curve at the Nyquist frequency is the most important parameter that reflects the image quality. We add push-scanning imaging and environmental effects to the static MTF of space camera and compare the MTF value with the dynamic MTF at Nyquist frequency. The comparison result can help us verify the accuracy of the calculating results and the feasibility of our method. (2011) Trans Tech Publications.
An efficient color transfer algorithm for recoloring multiband night vision imagery (EI CONFERENCE)
会议论文
Enhanced and Synthetic Vision 2010, April 6, 2010 - April 6, 2010, Orlando, FL, United states
Li G.
;
Xu S.
;
Zhao X.
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浏览/下载:14/0
  |  
提交时间:2013/03/25
A color transfer method is presented to give fused multiband nighttime imagery a natural daytime color appearance in a simple and efficient way. Instead of using the traditional nonlinear l space
the proposed method transfers the color distribution of the target image (daylight color image) to the source image (fused multiband nighttime imagery) in the linear YCBCR color space. The YCBCR transformation is simpler and more suitable for image fusion compared to the l conversion. The YCBCR transformation can be extended into a general formalism. And the paper mathematically proves that
for color transfer
using color spaces conforming to this general YC BCR space framework can produce same recoloring results as using the YCBCR space. Experimental results demonstrate that the YCBCR based color transfer method works surprisingly well for transferring natural color characteristics of daylight color images to false color fused multiband nighttime imagery
and moreover
can also be successfully applied to recoloring a variety of color images. 2010 SPIE.
An efficient color transfer method for fusion of multiband nightvision images (EI CONFERENCE)
会议论文
2009 International Conference on Information Engineering and Computer Science, ICIECS 2009, December 19, 2009 - December 20, 2009, Wuhan, China
Li G.
;
Xu S.
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  |  
浏览/下载:14/0
  |  
提交时间:2013/03/25
We present a color transfer method
which is designed to give fused multiband nighttime imagery a natural daytime color appearance in a simple and efficient way. Instead of using traditional nonlinear la space
the proposed method transfers the color distribution of the target image (daylight color image) to the source image (fused multiband nighttime imagery) in a linear color space named ICBCR. The ICBCR transformation is simpler than the la conversion
moreover
the IC BCR space is easily extended to image fusion. Our experiments on infrared and visual images show that the ICBC R based color transfer method works surprisingly well for transferring natural color characteristics of daylight color images to false color fused nighttime imagery. 2009 IEEE.
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