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小木虫2005

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[交流] 科技英语系列之 How Color Cameras Work (pdf-version)

How Color Cameras Work
The idea of a CCD is simple. We can imagine it as a memory chip without a "top". Photons encountering the memory cells create electrons in these cells (photoelectric effect) thereby the number of photons is proportional to the number of electrons. The photon's wavelength, however, is not "transferred' to the electrons. Hence CCD chips are color blind.
In the following we describe how color cameras work despite of the CCD chips' color blindness.

Please note:
• It is the responsibility of an on-site engineer to correctly integrate FireWire cameras in the context of real applications.

Content
Principles Starting Point Monochrome Camera ............................................................ 2
3CCD Color Camera ................................................................................................. 3
The Single CCD Color Camera .................................................................................. 4
Single CCD Cameras for Visualization and Measurement Visualization........................ 5
Measurement ............................................................................................................ 6
Color Interpolation (for Visualization)
Introduction .............................................................................................................. 7
Copy of Neighbor Pixels (Nearest Neighbor Replication) .......................................... 8
Mean Value of Neighbor Pixels (Bilinear Interpolation) .............................................. 9
Color Interpretation (for Measurement)
Introduction ............................................................................................................ 10
Interpretation Based on an Interpolated Image ......................................................... 11
Interpretation Based on the Digital Original-Image ................................................... 12

[ Last edited by 小木虫2005 on 2006-1-1 at 03:52 ]

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