Image Engineering camSPECS User Manual page 17

Note:
A long file path or a network path can cause problems using dcraw. Try to use short paths. (For
example: C:\program files\dcraw). See www.cybercom.net/~dcoffin/dcraw/ for a list of all
supported cameras and the current version of dcraw.
8. Choose the detection mode for the filters in camSPECS images:
- Automatic detection: Several camSPECS images can be measured subsequently without interruption.
- Semi-automatic detection: Each spectral measurement is interrupted by a dialog to control the filters'
ROI locations. The preceding filter detection is automatic, and the ROIs can be activated and aligned
with the mouse.
Semi-automatic detection of the filters in camSPECS. The ROIs shown in this example were set to a size of 50% (left), respectively
70% (right) of the diameter of the corresponding filters.
- Manual detection: Each spectral measurement is interrupted by a dialog for manual detection of the
filters. Use this option if the automatic detection fails. Reasons for failing are mostly images exposed with
wide-angle lenses or images with artifacts caused by stray light during shooting. Use the four sliders to
limit the characteristics of the neutral density filters. Compare the detection in the image (left side) to the
nominal positions of the filters. If the correct number of filters of 40 is found, continue by clicking the OK
button. This dialog panel is also invoked when automatic detection fails with an image.
Image Engineering
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