I have been experiencing an issue with the image align phase. I have captured several images using a DSLR camera equiped with a 15 mm fisheye lens, and of the same zone 20 scans colored with the internal camera using a P30, registered in Cyclone and exported as .e57.
For some reason, The software RC cannot match scans with images and created two separate component. Here is an example of the image from the scan and an image from the camera :
On previous projects where the alignement worked beautifully, I used for coloring the scan and for the photos the same camera, but with different lenses (a 24 mm for the photos, and a fisheye 8 mm or 15 mm for the scan position panorama used for scan colouring). Even for photos shot only on a small part of the scene, the photos were correctly aligned (which amazed me).
I also had some projects where the scans where colored with a fisheye lens (15 mm) at the same nodal point position (thus just a e57 exported from Cyclone), and many pictures taken both with a normal lens and a fisheye lens and it worked.
So my question is why does it fail when the color information for the scan is taken with the internal camera of the laser scanner ?
Also by extension, if we do not color a scan (using only the intensity) can RC match pictures to the scan (or the space used for calculation treeat the information fairly different) ?
Finally, is it possible to color 2 or 3 scans, make the rest in intensity only and use external photos for colouring ?
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