Comments for mathnathan

Comment on Predator-Prey Model by Nathan Crock

Nathan Crock — Wed, 01 Feb 2012 19:20:18 +0000

Ashley,

I’m glad you found this post helpful! I hadn’t any plans for an Euler-Lotka visualizer, why don’t you make one!? You can use my program as a template!

Happy coding!

Comment on Getting Started with Git by 2 vídeo e 17 tutoriais sobre Github para você virar Ninja e sair detonando! | Desenvolvedor, Webdesigner e Pesquisador | deivison.com.br

Wed, 01 Feb 2012 18:52:51 +0000

[...] Getting Started with Git [...]

Comment on Predator-Prey Model by Ashley

Ashley — Wed, 01 Feb 2012 06:06:58 +0000

Have you thought about doing something with Euler-Lotka? That would be awesome!

Comment on Predator-Prey Model by Ashley

Ashley — Wed, 01 Feb 2012 06:01:29 +0000

Phenomenal post! Thank you for sharing both the information and the program. I look forward to reading more about your projects.

Comment on Kinect Depth vs. Actual Distance by Javi

Javi — Sat, 14 Jan 2012 09:43:09 +0000

Hi Nathan! For me it is very important to justify the equation, for this reason I want to know where that number comes. It seems that the equation is based on the model of stereopsis: z = (b * f) / d
Cheers!

Comment on Kinect Depth vs. Actual Distance by Javi

Javi — Thu, 05 Jan 2012 10:35:39 +0000

Hi Nathan! Thanks for the reply.

What I would like to know is where comes from the number 1091.5.
I know that the number 34800 comes from: 7.5 * 580 * 8, where 7.5 is the baseline, 580 is the focal length of the IR camera, and 8 is due to subpixel accuracy.
But I don’t know where the number “1091.5″ comes from .

Thank you very much.

Comment on Kinect Depth vs. Actual Distance by Nathan Crock

Nathan Crock — Wed, 04 Jan 2012 20:49:23 +0000

Hey Javi,

The raw data from the Kinect is the disparity. The actual depth, z, given the kinect disparity, d, is…

z = 34800/(1091.5-d)

and that is in cm.

Comment on Kinect Depth vs. Actual Distance by Javi

Javi — Wed, 04 Jan 2012 17:37:23 +0000

Hi Nathan!

I would like to know where you got the formula used to calculate from raw data to real depth. And what is the value 1091.5?

Best regards

Comment on Tutorials by Nathan Crock

Nathan Crock — Thu, 22 Dec 2011 18:56:08 +0000

Hey again Arjun,

I answered your previous question regarding CMake, but with this it sounds like what you’re trying to do is create a link between files. This is a shell specific question, whether you want to make a soft or a hard link depends on what you’re interested in and the file system your dealing with. A hardlink is the equivalent of a reference variable, you change one it changes the other, while a soft link is more like a pointer. However, which one you should use depends on more than each links functionality, for example, hard links typically will not work across file systems.

Good luck

Comment on Getting Started with CMake by Nathan Crock

Nathan Crock — Thu, 22 Dec 2011 18:51:15 +0000

Hey Arjun,

Thanks for reading my article. You say link, so I assume you’re trying to plug some shared or dynamic library into a current project. (You can always compile a library with CMake before this linking example if it hasn’t yet been compiled).

Say you’ve got your target program “TARGET.cpp”,
CMAKE EXAMPLE: add_executable( target TARGET.cpp )
and your library “LIBRARY.so”,
CMAKE EXAMPLE: set( LIBS LIBRARY.so )

Linking your target with your libraries is a one liner.
target_link_libraries( target LIBS )

Hope that helps