Laser scanner experiments (again)

Mar 6, 2011

After some break, I am back at the laser scanner experiments. Today I tried to make a new housing for the laser assembly so that I can place it properly in relationship with the camera. I am planning to create a base platform which has screw holes at known positions so that I can screw the camera and laser housing. That would reduce my initial setup time quite a bit. All this activity was with the intention to increase the accuracy than previous setup :-) Turn table New laser housing I tried to find some interesting items that were available near me, I have to say that the scanning process today was quite fruitfull.  I tried to run the previous algorithms but it was taking too much time for the model 1, and data was flying around quite a bit, I need to check the logic again, maybe tomorrow again (going to sleep now).

Morning photos of nearby farms

Jan 14, 2011

A vist to nearby farms, its looking like a good place for doing some paintings as well...

The book shelf

Jan 10, 2011

I wanted to fix a nagging storage problem for my books and CDs… They are currently stored in boxes. I haven’t unpacked them yet since I don’t have proper place for them yet. Sounded like a good opportunity for a carpentry work :) after doing the T junction in college workshop this was the first real object I tried to make.<div>As being familiar with Blender, it helped to make a quick prototype model in it with the scaled measurements. </div><div></div><div>I got the plywood cut form the vendor since he had the proper equipment to cut it straight. But he made odd mistakes in millimetres which I had to rectify at home anyway :) since it had to be perfect for the design to work.<div></div><div></div><div></div></div>

Landscape painting outdoors

Jan 10, 2011

Landscape painting outdoors... from a follower of impressionism (role models: Claude Monet, Alfred Sisley, Renoir)From Haven't thought about a title yetOriginal photo at the placeThis is a spot at our nearby park location in early sunday morning of the winters. Good artists get inspired anywhere and from almost anything, but guys like me need good subjects to start painting :) I chose an easy subject here with lot of clear visual volume (by turbidity in air) between objects. It makes it easy to identify colour patches. I did not concentrate on the shapes much here, my focus was colour (outdoors we have to work fast as the colour changes quickly with the light), maybe I will retouch that later (I need to work on the sky and the shapes a little bit anyways) The painting is one session, Acrylic on paper.From Haven't thought about a title yet Well after a long time (possibly 6-7 months) I sat down for a painting session, that too outdoors! All thanks to a good painter friend of mine. He does good stuff with water colours.

Stuck in reverse

Nov 14, 2010

Well I am getting a bit of progress on the 3D viewer and physics stuff, but it is rather slow. Part of the things that I wanted to try is to reverse engineer a real object and load it in a simulated WindTunnel (Physics engine) to run a basic test on that. This has lead me to create a very basic laser scanner at home, its very primitive at this point of time and I do not intend to go deep into developing the one giving best results, its too early. optical setupTurn table using a slow motorThe Math has also gone slightly out of hand there the object placement is a bit inaccurate, I need to get back to the basics and work out that part again, but it gives some sort of results as of now although not very accurate ones :-)For generating the points here are the steps I have followed, ideally a single program should do those things automatically...1) Capture a video by a fast camera2) Take screenshots through program like SMPlayer3) Calculate angular displacement of the model and use the equations mentioned in the reference articlesThe image processing component is written by me, but the viewer is not able to handle so much data at the moment, hence an opensource tool GMsh is used for point visualisation.---References:http://en.wikipedia.org/wiki/3D_scannerhttp://www.youtube.com/watch?v=SPywgDBjM1Yhttp://www.muellerr.ch/engineering/laserscanner/tutorial/the_principle.html

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