Search found 346 matches

by Micr0
11 Nov 2019, 13:45
Forum: Structured light scanning
Topic: Noob question on SLS
Replies: 23
Views: 629

Re: Noob question on SLS

.jpg can be a very destructive compression scheme depending on the level of compression. I don't really know anything about the other formats. I have been using Y800 with my IS cameras which I believe is a raw monochrome format. It seems to work very well, but I have no experience with the other for...
by Micr0
10 Nov 2019, 23:11
Forum: Structured light scanning
Topic: Noob question on SLS
Replies: 23
Views: 629

Re: Noob question on SLS

Depth of field (Focus?) has always been of interest to me. I tried an early laser projector thinking that that may be better, but something about the light produced terrible scans. I guess AV projectors are just not designed to be optimal for what we are doing. :D
by Micr0
08 Nov 2019, 15:39
Forum: Hardware/Accessoires
Topic: Camera based on Sony IMX 385 matrix
Replies: 2
Views: 109

Re: Camera based on Sony IMX 385 matrix

I understand that monochrome cameras based on IMX 174/249, IMX 265 or IMX 264 matrices are a very good choice. But these are all quite expensive (for me) cameras. Therefore, as a fallback, I consider the IMX 178 (although there are too many pixels - 6.3Mp / 2/3 ") and, according to the description,...
by Micr0
08 Nov 2019, 01:57
Forum: Structured light scanning
Topic: Vanishing Scanning Spray
Replies: 8
Views: 312

Re: Vanishing Scanning Spray

OBNRacerMan wrote:
07 Nov 2019, 12:32
martan wrote:
07 Nov 2019, 12:20
Cyclododecan vanishes. Automagically :-)
Ohhh! It is very cool.
True but how fast? The spray in the video is very slow to vanish giving you time to scan.
by Micr0
06 Nov 2019, 14:15
Forum: Structured light scanning
Topic: Vanishing Scanning Spray
Replies: 8
Views: 312

Vanishing Scanning Spray

Here is an interesting alternative to Magnaflux developer, spray chalk and other coatings for scanning. https://www.capture3d.com/3d-metrology-solutions/consumables/aesub-blue-vanishing-3d-scanning-spray Expensive at $65/can, but I wonder how long it lasts and how many objects you can get out of one...
by Micr0
17 Oct 2019, 16:28
Forum: Working with scans
Topic: How to evaluate the quality of the 3D model (point cloud)?
Replies: 4
Views: 350

Re: How to evaluate the quality of the 3D model (point cloud)?

Hello everyone I need to evaluate the quality of the 3D model (or point cloud) reconstructed from 3D laser scans. The main issue is, that I don´t have the ground truth model for this evaluation . Can you please suggest any ideas? I read many research papers on which usually used photogrammetry or m...
by Micr0
17 Oct 2019, 16:23
Forum: Show your latest scan
Topic: Some of my scans
Replies: 16
Views: 1443

Re: Some of my scans

Excellent. Thanks for sharing.
by Micr0
14 Oct 2019, 15:55
Forum: Structured light scanning
Topic: Frequencies in David SLS Macro scan
Replies: 5
Views: 225

Re: Frequencies in David SLS Macro scan

I was creating a coin scan but not 100% satisfied with surface. I have some frequency from projector in the result that bothers me. I was changing fps relation between cam and projector as well as shutter time etc. no mayor changes somebody have a idea? Scan_Waves.JPG The periodic ridges tend to be...
by Micr0
14 Oct 2019, 15:45
Forum: Structured light scanning
Topic: DAVID 4 Scanner missing parts in scan
Replies: 5
Views: 931

Re: DAVID 4 Scanner missing parts in scan

First off, the frame rate of the camera should be 1/60th sec. You will then need to better sync the projector and camera. Try adjusting the frame rate of the projector in the monitor setting till you get less jitter. nVidia and AMD both offer control panels that offer fairly precise control over th...
by Micr0
14 Oct 2019, 15:42
Forum: Structured light scanning
Topic: Noob question on SLS
Replies: 23
Views: 629

Re: Noob question on SLS

What OBN said. the function of the projector is to project the vertical and horizontal lines on the subject. the cameras read the distortion as the image falls across the surface. since the patterns are vertical and horizontal the projector resolution isn't extremely critical. once you get over HD y...