Image Engineering
Seite
4
von
12
•
Check the advanced settings menu to adjust the default values as needed.
•
Add the initial
calibration file delivered on the CD in the settings panel with the “+”
-button.
More files can be added or removed from the menu using the corresponding buttons
(“+”,
“
-
“)
. Calibration files created during calibration process with the software are automatically
added to this menu.
•
Update all other settings as needed and add an optional dark image.
•
Select and add images with the '+' button.
•
Click the
Start
button.
•
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.
•
The result of the measurement is displayed and a text file with the name of the image is
saved in the same directory as the images.
•
For documentation purposes the spectral curves can be saved as an image file.
3.1.2 Spectral sensitivity (iQ-LED) module
•
Start the camSPECS software and switch to module
Spectral sensitivity (iQ-LED).
•
Select the desired
Spectral Sensitivity Database
.
•
Select the
Dark frame
, if desired.
•
Select the
Spectra
that were presented to the camera and were saved from the separate
iQ-LED application software.
•
Select the
Images
that were captured by the camera for each of the
Spectra
.
•
Click the
Start
button.
•
The computed spectral sensitivities are displayed and a text file is saved.
3.1.3 Validation module
•
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.
•
The picture shall have uncompressed RGB or raw data (e.g. TIFF format).
•
Select the
Validation
module and choose a spectral sensitivity measurement. The previous
spectral measurement, if available, is shown in the highlighted field.
•
Select the light source and reflectance data from the drop-down menus corresponding to
the selected ColorChecker.
•
Select the ColorChecker image.
•
Select optionally a dark image for correction.
•
Click the
Start
button and draw a rectangle around the patches in the displayed image.
•
Double click on the image and check the positions of the ROIs in the next step. Their
positions may be corrected by dragging and dropping them with the mouse before clicking
on the image outside the ROIs to continue.
•
The graph displays the measured RGB values for each patch plotted against the predicted
values in normalized values (from 0...1).
•
For documentation purposes the graph can be saved as an image file.
3.1.4 Color Transforms module
•
Select the
Camera Spectral Sensitvities
file just created in one of the
Spectral Sensitivity
modules.
