SoliForum - 3D Printing Community — Let's see some of your scans

Re: Let's see some of your scans

null@example.com (C_D) — Sat, 06 Aug 2016 22:05:34 +0000

Just fitted some new lasers and recalibrated my scanner. Pretty happy so far.

This is 1100 frames (thats full stepping using my 0.9deg stepper and 1:2.75 geared platform). Scanned with the left and right lasers separately and then merged in meshlab. Minimal post processing, just removing a few clusters of stray points caused by shiny spots on the part. BIG thanks to pirvan for the post processing tutorials!

There are some scaling issues I need to work out, the scan is about 50% scale and stretched slightly in Z. I scaled the STL down by 80% in the Z axis only and it now looks about right.

Re: Let's see some of your scans

null@example.com (czc) — Tue, 12 Jul 2016 15:06:39 +0000

One of my first attempts using FreeLSS 1.18.
8MP v2 camera, RPI3

Scanned in 8MP, 200 frames, both lasers. Very fast just to play with lighting and so on.
No postprocessing as it is captured directly from the scanner's webpage.

Model is 5cm tall.

Amazing software!

Re: Let's see some of your scans

null@example.com (CaptainJaneway) — Tue, 31 May 2016 04:50:27 +0000

Here's a new scan I just did, 1600 frames this time, 5 MP still, both lasers. I re-calibrated before this scan as well, and took a lot of time to get things just as perfect as possible. Also, updated to the latest version of freelss.

Also I put the scanner in a lightbox with an LED hue light so I could adjust the intensity and color temperature. I noticed that the lasers have some difficulty getting into the fine details of the head. I've ordered higher quality and higher power line lasers off ebay so I'll experiment with that, as well as the higher resolution pi camera.

Overall I'm very impressed so far, and while there is room for improvement the performance is already quite good with some initial fiddling.

Re: Let's see some of your scans

null@example.com (CaptainJaneway) — Mon, 30 May 2016 21:25:35 +0000

Here are some pics of my very first scan, of a fish tank ornament. 5 MP @ 800 steps. I'm going to try again at laser/camera calibration and fiddle with the settings, etc.

I assume the lines are caused by laser alignment? I was able to refocus the camera, seems pretty sharp.

Re: Let's see some of your scans

null@example.com (hairu526) — Sat, 28 May 2016 01:08:56 +0000

I have a very similar duck that I sometimes scan as well

Re: Let's see some of your scans

null@example.com (knowack) — Fri, 27 May 2016 23:25:26 +0000

A rubber ducky! I ended up scanning it in dim lighting to get the most accurate results. it did a pretty good job picking up the contours of the wing, etc. A hi-res scan using only the right laser.

-Kevin

Re: Let's see some of your scans

null@example.com (knowack) — Thu, 05 May 2016 00:18:55 +0000

I'm using a fluorescent bulb at the moment, but it is a little too blue-ish. I think I'm going to go with halogens.

-Kevin

Re: Let's see some of your scans

null@example.com (n2ri) — Wed, 04 May 2016 17:56:45 +0000

what lighting are you using?

Re: Let's see some of your scans

null@example.com (knowack) — Wed, 04 May 2016 10:55:58 +0000

Another screen grab of an Atlas 3D scan:

This is a 4" tall carved and painted wooden bird that I bought in Panama several years ago. The interesting thing is that it has a glossy finish, yet the scanner wasn't adversely affected; this same item caused difficulty for a Matter&Form scanner.

Re: Let's see some of your scans

null@example.com (knowack) — Fri, 29 Apr 2016 04:22:26 +0000

Here's my first scan with Atlas 3D before any clean-up or post processing (a screen grab of the browser view):

This is a ceramic bunny about 5" tall, that belonged to my grandmother. It had been dropped and glued back together at some point. I intend to 'repair' the glue joints and broken paw, and print a new one. I'm quite impressed that the Atlas 3D even picked up the wicker texture of the basket!

I used the 'Default' preset, with the exception of using both lasers.

I have to say that I am very pleased with the Atlas 3d scanner, and laser-cut acrylic case! Kudos to Uriah and Tim for such a great piece of hardware!

I was a Kickstarter backer, but only recently found time to put the Atlas 3D together. Although I had originally intended to print the scanner (mostly for bragging rights), I'm glad I bought the laser-cut case. It looks great, and I probably would have wasted more $ in filament (I'm very picky about my prints) than the cost of the acrylic frame. I'm confident my results will only improve as I play around with different settings.

My next project for the Atlas 3D is to get WebGL working in the Pi's browser!

-Kevin

Re: Let's see some of your scans

null@example.com (hairu526) — Fri, 01 Apr 2016 23:09:06 +0000

When scanning with both lasers, the points from the left laser are only used where no points exists for the right laser.

- Uriah

Re: Let's see some of your scans

null@example.com (pirvan) — Fri, 01 Apr 2016 13:57:21 +0000

I'm not sure, and this is something that Uriah needs to comment on, but if I remember correctly, the final "blend" is made up primarily of the right hand laser, with the left laser filling in the missing spots. In other words, when the same information exists from both lasers, only the right laser info is kept.

Re: Let's see some of your scans

null@example.com (Viseng) — Fri, 01 Apr 2016 11:22:44 +0000

Thanks to all for comments relating to the direction of rotation, it has certainly helped me towards a better understanding of what is involved in obtaining good scans. I have since looked in greater detail at the "shadowing" in my previous scans which gave the impression of a preferential bias towards objects rotating away (CCW) from the camera over those approaching (CW). In the case of this test object it is co-incidental that the missing detail on faces on the RHS side were due to the faces being tangential to the can and therefore more closely parallel with the laser planes than the LHS. It tends to confirm the process of moving the object so that both close and distant views are obtained of the same detail, as this would increase the number of points per tangential face. This led me to wonder if deliberately offsetting one laser plane by say 2 degrees with respect to the other (assuming the software could take this into account) would yield a more beneficial effect than the existing equi-angled arrangement.

Taking the point about direction not being a factor, it raises a few questions though. Assuming first that the lasers are setup identically and creating the same imaging planes equi-centred on the imager. I have not yet looked into the detail of the processing, but is it fair to assume that there is no "master" laser plane - that is both have equal significance when the software automatically merges them? Is is better to create two seperate files and work on each L,R image seperately?

Thanks again,

Re: Let's see some of your scans

null@example.com (hairu526) — Mon, 28 Mar 2016 22:55:47 +0000

That's correct. The direction the table turns shouldn't matter.

Re: Let's see some of your scans

null@example.com (pirvan) — Mon, 28 Mar 2016 19:27:23 +0000

I think that might have some (minor) impact if you were to capture in video mode.

In still mode, the turntable rotates, stops, then the camera takes 2 pictures for each laser. One with the laser off, one with the laser on. The "laser on" image is like the image you see when you do a test, black with only the red laser trace. FreeLSS uses this image as a mask against the image taken with the laser off, saving only the little band of color that was under the laser. Then it rotates 0.225° (or whatever depending on your number of steps), and repeats the steps above.

At least that's how I understand it works.