Spectral Sensitivity (Iq-Led) Module; Validation Module; Color Transforms Module - Image Engineering camSPECS User Manual

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Click the Start button.
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Check the result of the automatic detection and confirm by double-clicking on the image outside the
displayed Regions of Interest (ROI). The rectangles may be rearranged here if necessary.
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The measurement result is displayed, and a text file with the image name is saved in the same
directory as the images.
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The spectral curves can be saved as an image file for documentation purposes.

4.3.2 Spectral sensitivity (iQ-LED) module

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Start the camSPECS software and switch to module Spectral sensitivity (iQ-LED).
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Select the Spectral Sensitivity Database.
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Select the module Dark frame subtraction and the image file for an optional dark image.
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Select Add Spectra Folder containing the iQ-LED spectral power distribution files, ensuring that the
file naming convention is as specified below.
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Select Add Image Folder containing the camera captures of the iQ-LED spectra files, ensuring that
the file naming convention is as specified below.
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Click the Start button.
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The computed spectral sensitivities are displayed and saved as a text file.

4.3.3 Validation module

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Take a picture of a ColorChecker (24 patches) or ColorChecker SG (140 patches) chart that was
illuminated by a light source whose spectral distribution is included in the software (D50, D55, D65,
A, C). Additional spectral distribution files can be added to camSPECS.
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The picture shall have uncompressed RGB or raw data (e.g., TIFF format).
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Select the Validation module and choose a spectral sensitivity measurement. The previous spectral
measurement, if available, is shown in the highlighted field.
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Select the light source and reflectance data from the drop-down menus corresponding to the
selected ColorChecker.
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Select the ColorChecker image.
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Select a dark image for correction as an option.
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Click the Start button and draw a rectangle around the patches in the displayed image.
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Double-click on the image and check the positions of the ROIs in the next step. Their positions may
be corrected with drag and drop before clicking on the image outside the ROIs to continue.
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The graph displays the measured RGB values for each patch plotted against the predicted values in
normalized values (from 0...1).
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The graph can be saved as an image file for documentation purposes.

4.3.4 Color transforms module

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Select the measured Camera Spectral Sensitivities file.
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Select the Transform type, Reference illuminant, and Profile type.
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