CameraCalibration

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This image shows a diagram of how the different devices are set up. The monochromator produces light with energy in a narrow range of wavelengths. The spectroradiameter measure the spectral energy in the light (see graphs of spectral energy in the light on the lower left). The camera captures an image  
This image shows a diagram of how the different devices are set up. The monochromator produces light with energy in a narrow range of wavelengths. The spectroradiameter measure the spectral energy in the light (see graphs of spectral energy in the light on the lower left). The camera captures an image  
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[[Image:ExperimentalSetup.png|thumb|right|320px|Devices used for camera calibration.]]  
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[[Image:ExperimentalSetup.png|thumb|right|320px]]
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[[Image:MonoLights.png|thumb|right|320px]]  
=== Monochromator  ===
=== Monochromator  ===
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The monochromator produces lights with narrowband wavelengths. Here is an image of the monochromator  
The monochromator produces lights with narrowband wavelengths. Here is an image of the monochromator  
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[[Image:MonoLights.png|thumb|right|320px|Spectral power distributions of the monchromator output.]]
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Typically, there is an integrating sphere that blurs the light over a uniform area. This reduces the intensity of the light, so we remove the intregrating sphere. Now we have a slit of light with more focused energy in a given wavelength. image here of light  
Typically, there is an integrating sphere that blurs the light over a uniform area. This reduces the intensity of the light, so we remove the intregrating sphere. Now we have a slit of light with more focused energy in a given wavelength. image here of light  

Revision as of 10:34, 6 August 2015

During camera calibration we determine the spectral sensitivity functions of the camera sensor.

Contents

Experiments

This image shows a diagram of how the different devices are set up. The monochromator produces light with energy in a narrow range of wavelengths. The spectroradiameter measure the spectral energy in the light (see graphs of spectral energy in the light on the lower left). The camera captures an image

ExperimentalSetup.png
MonoLights.png

Monochromator

The monochromator produces lights with narrowband wavelengths. Here is an image of the monochromator


Typically, there is an integrating sphere that blurs the light over a uniform area. This reduces the intensity of the light, so we remove the intregrating sphere. Now we have a slit of light with more focused energy in a given wavelength. image here of light

Light source

Spectraphotometer

Camera

Procedure

Software

The code for camera calibration is in PDC at:

Relevant Matlab m-files are:

  • filtersCharacterize.m
  • estimateSensorSpectralResponse.m -
  • critSensitivities.m
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