Image Engineering camSPECS User Manual page 21

Verification:
1. Please select one of the remaining three camera modules and measure its spectral sensitivity.
2. This module captures the iQ-LED device using the adjusted stored illuminants, as seen above.
3. Launch the camSPECS software Spectral sensitivity (iQ-LED) module. Load the custom spectral
sensitivity database, the dark frame for this camera module, the image and spectra folders
corresponding to the adjusted stored illuminants, and with the default settings, click Start.
4. Load the Reference Spectral Sensitivities for this camera module from 1 above.
5. Optimize the settings described below to minimize the difference between the computed and Reference
Spectral Sensitivities.
6. Confirm these settings by repeating 1-5 above with the remaining two camera modules.
7. In Production, each camera module on the production line is presented to an iQ-LED device and
individually captures a series of LEDs. The iQ-LED spectral data are combined with the corresponding
camera module RGB data and the spectral sensitivity camera database to compute the spectral
sensitivity of the production-line camera module.
8. Since the estimation method is susceptible to the particular spectral characteristics of a given make and
model of a camera module, the set of optimal estimation parameters should be determined through the
default settings. It usually gives a reasonable, if not optimal, result or starting point. Once the optimum
set of parameters has been identified, they may also be implemented directly in the production-line
calibration API (available from Image Engineering). A default database created from more than 40
camera makes and models is provided with the sample data set purely for illustrative purposes. The
features described below may be exercised with data from another camera, make, and model. This data
set is shown with the default (not optimized) settings. For actual production-line camera color calibration,
Image Engineering
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