[OpenDroneMap-dev] (no subject)

[Alex Mandel]

On 03/04/2015 11:51 PM, Cole wrote:
> 1.  It was in reference to the idea of replacing the perl script with
> python.  I think using a web framework to such as cherrypy or flask to do
> so would be logical so we would not have to worry about any platform
> specific sys calls.  I am not talking about running an external website, it
> would be a local service with a web interface.  Having a HTML5 interface
> would also open up the project to non-devs for use and allow integration
> with visualization tools such as cesium/open layers.  

So you're implying something like a ctypes wrapper around the C parts to
avoid sys calls (which would still exist otherwise even with python)?
I have also heard Flask is good ( I have more experience with Django but
that's overkill for this).

Yes HTML5 would make an interface easier to manage, especially for
people who want to run it remotely on amazon instances.

To note, by
> background is in computer vision and autonomous systems, so while building
> the framework should be straight-forward some of the mapping and fancy web
> stuff is out of my realm of comfort.  There is quite a bit of talent in the
> GIS community that could probably help fill in for my weaker areas.
> 
Ya don't worry about that part, we do have that covered. I've already
been pondering how to link this into QGIS as a toolbox.

> 2.  I have to do some camera calibration for another non-commercial project
> I am working on that involves matching frames using SIFT points.  I'll
> package my work and make it suitable for inclusion in this project.  I use
> openCV, which is BSD.
> 

Sounds great,
Alex

> On Thu, Mar 5, 2015 at 1:25 AM, Alex Mandel <tech_dev at wildintellect.com>
> wrote:
> 
>> On 03/04/2015 09:03 PM, Cole wrote:
>>> All,
>>>
>>> I was very impressed with Steve's presentation at NCGIS.  I have been
>>> looking for an open source project that is new, and interests me.  This
>>> looks like the perfect match.
>>>
>>> I have not done much web development and would like to get some
>>> experience.  A python micro web framework such as Flask might seem like a
>>> good way to go when doing the port.  Let me know your thoughts and II'll
>>> get a something started over the next few weeks.
>>>
>>
>> Did I miss a discussion about building a website? Or was this in
>> reference to the idea replace the main scripts with something more
>> people are comfortable editing?
>>
>>> With python, it should be fairly trivial to directly call the C libraries
>>> for easier cross-platform support.
>>>
>> +1
>>
>>> I also noticed that people are having issues with camera calibration.  I
>>> have gone through this with some of my computer vision problems.  OpenCV
>>> includes a library that will give a transform based upon a picture of a
>>> checkerboard.  My first order of business will be to through together a
>>> python script to correct images.  I do not know how this will affect the
>>> rest of the toolchain.
>>>
>>
>> I already have such a script (
>> https://github.com/wildintellect/lenscorrection ), though it's specific
>> to the GoPro, technically any camera/lens in lensfun should be
>> compatible. The issue I have is after you correct images, what is the
>> new effective camera parameters that opendronemap needs. I was planning
>> to measure this from some rulers taped to the wall, but I like your idea
>> of using a checkerboard.
>>
>> I suppose you are talking about calibration in general, the lensfun
>> project has that covered pretty well but your are right a script to come
>> up with the camera parameters from a checkerboard would be a good tool.
>>
>>> Let me know if anyone is working on these issues already, and if this is
>>> the direction that the rest of you want to go, and any hang-ups you may
>>> foresee.
>>>
>>> -cole
>>>
>>>
>> Thanks,
>> Alex
>>
>