Thanks for the reply. The camera is located approximately 12" to the left of the projector, slight higher (2-3" higher). I have attached a picture.
I think the brightness is good as you can see from the picture above. Although, I would assume that most of the lighting would come from the projector. Also, I'm fairly certain all is in focus as I acquired the scan right after calibration and nothing was changed and the cal was good (~1.0-1.5 error for both camera and projector). Calibration was performed at almost the same distance as from the brick wall (minus the size of the calibration board). The distance to the wall is ~32". Lens is a fujinon 6mm/1.2:1 focus with locks (locked tight after cal).
I have attached a picture of the scan (point cloud) to show as well. It is hard to see, but the points are almost in a conical shape emanating from the big cluster on the left side. Most of the scans I have taken result like this. I have done this process approximately 20 or so times (cal camera + projector, then scan a flat surface as outlined in the docs). Occasionally, I will get a scan where half the points look like the object I'm scanning and the other half is just garbage (not sure if that detail helps). The can is a full scan (vertical + horizontal).
Any help would be greatly appreciated. Let me know if any other details are needed. Thanks.
Thanks for the followup.
I have previously attempted the calibration and scanning in total darkness with the same result (about 5 times). So it seems independent of ambient light. The scan I attached was done in an office with no outside sunlight. So some ambient light but the projector was definitely bright enough to over whelm the ambient light.
My expectation of the points is that they should look similar to that of the "Calibration Verification" scan in the documentation (Section 3.8 from "TIDA-00254 -Accurate Point Cloud Generation", filename dlpu019a.pdf). Essentially it should be a flat surfaced wall (actually the same wall in front of the setup in the previous post image). So the scan is pretty far off.
As for your suggestion of vertical and horizontal scan separately. I just tried it and vertical scan pattern produced no points. The horizontal scan produced essentially the same as the full scan. So apparently, the points from the full scan are just from the horizontal scan.
I was also wondering about the calibration board (see image above). I included it in case something jumps out as a problem. I used tape to place it on a poster board. There are slight wrinkles but not bad. The square size is 21 mm. The poster board is matte, so no shiny material. It is placed approximately where I do the cals.
Thanks.
During my investigations, I came across some additional information (may or may not be an issue). I mentioned earlier, that sometimes only half the scan is bad (usually the top half). I was looking I recently scanned again and while browsing through the "output/scan_images" directory (where the captured pattern images are stored), I notice that some (not all) have a significant blur horizontally in the center. This location corresponds to parts of the resulting scanned image where there seems to be problems. The image below shows both images (left pattern projected image 13, right is the color map from the full scan). Ideas? Thanks for your help in advance.
I was able to successfully make a scan with my camera. We have a FL3-U3-12S2C-CS here and it worked fine.
Could you do the following? Open the Point Grey Flycapture2 software and click on the circled button. If you could show us what your trigger settings and advanced camera settings are, we can compare and see if anything else looks like it needs tweaking.
