[Haskell-cafe] [ANN] New OpenCV Bindings

Ivan Perez ivanperezdominguez at gmail.com
Sat Sep 28 20:23:44 CEST 2013

The people working on HOpenCV are very open to incorporating other's
programmer's patches. Maybe you can incorporate your changes to
cv-combinators? (Project's been halted since 2010, I'm sure they'll be very
happy to see that sb is contributing).

On 28 September 2013 19:13, Arjun Comar <nrujac at gmail.com> wrote:

> Fair enough, it's been two or three years since I tried to play with them.
> Most of my work is in the raw bindings currently, which provide the C++ API
> in Haskell, so much lower level that cv-combinators. If HOpenCV were to
> incorporate parts of these bindings then cv-combinators would be able to
> benefit from this work. That said, my effort going forward is to provide
> something equivalent to cv-combinators in expressiveness. I'm definitely
> taking inspiration from the library though I'm not basing my work on their
> source code.
> On Sat, Sep 28, 2013 at 12:51 PM, Ivan Perez <ivanperezdominguez at gmail.com
> > wrote:
>> I think they do work. cv-combinators depends on HOpenCV, which depends on
>> OpenCV 2.0.
>> On 28 September 2013 16:03, Arjun Comar <nrujac at gmail.com> wrote:
>>> No, these are unrelated. Cv-combinators hasn't really worked since
>>> OpenCV 2.0 waa released I believe.
>>>  On Sep 28, 2013 8:54 AM, "Ivan Perez" <ivanperezdominguez at gmail.com>
>>> wrote:
>>>> Cool. Thanks a lot for uploading this.
>>>> I have a question (and I confess that I haven't checked the link). How
>>>> is this related to or overlaps with cv-combinators?
>>>> Cheers
>>>> Ivan
>>>> On 28 September 2013 06:18, Arjun Comar <nrujac at gmail.com> wrote:
>>>>> After receiving feedback, I went ahead and split out the raw C
>>>>> wrappers and Haskell bindings. You can find them at
>>>>> www.github.com/arjuncomar/opencv-raw. I'll upload it to hackage as
>>>>> opencv-raw once I have uploader privileges.
>>>>> Regards,
>>>>> Arjun
>>>>> On Fri, Sep 27, 2013 at 4:09 PM, Arjun Comar <nrujac at gmail.com> wrote:
>>>>>> Hi all,
>>>>>> I've been hard at work on a new set of OpenCV bindings that will
>>>>>> hopefully solve a lot of the shortcomings with previous attempts. An
>>>>>> automatic header parser has been used to generate a full set of Haskell
>>>>>> bindings for the C++ API, and I'm now working to create a pleasant Haskell
>>>>>> API. The plan is to expose major functionality through pipes for two
>>>>>> reasons: 1) OpenCV is not very referentially transparent, and so you're
>>>>>> stuck in IO for anything non-trivial. Lazy IO is potentially problematic,
>>>>>> and so immediate incorporation of a proper streaming library is probably
>>>>>> best. 2) Computer vision algorithms are frequently expressed in terms of
>>>>>> pipelines of functionality, and a pipes approach can provide a very natural
>>>>>> API for expressing these algorithms.
>>>>>> At this stage, I could very much use input from anyone who's
>>>>>> interested in these bindings. I've got the basics of a library forming, but
>>>>>> there's a ton to do and help in the form of pull requests are very very
>>>>>> welcome. I could also use feedback on what's been done so far (especially
>>>>>> criticisms) as well as feature requests.
>>>>>> The current plan is to develop the pipes API for the core
>>>>>> functionality. The plan is to provide the major functionality from core,
>>>>>> highgui, imgproc, features2d, contrib, ml, flann, video, and objdetect as
>>>>>> quickly as I can before trying to cover any of the more specialized parts
>>>>>> of the API. The functions and types from these modules (baring a few major
>>>>>> and important exceptions) are automatically translated into C wrappers and
>>>>>> raw Haskell bindings.
>>>>>> If there's sufficient interest in these raw bindings separately from
>>>>>> the API I'm developing, I'll release them as a separate package on Hackage.
>>>>>> I'm calling my project revelation for the moment because I'm bad at naming
>>>>>> things and it was the best pun I could come up with.
>>>>>> Github: www.github.com/arjuncomar/revelation
>>>>>> Regards,
>>>>>> Arjun
>>>>> _______________________________________________
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