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digitalmars.D.announce - New and Unofficial OpenCV binding for D programming language

reply Ferhat =?UTF-8?B?S3VydHVsbXXFnw==?= <aferust gmail.com> writes:
Hi folks!

D is awesome, but it is a shame that there is no any opencv 
bindings for d yet. Actually we have it now :) Although I am a 
new dlang learner, I dared to do it: 
https://github.com/aferust/opencvd. C interface was taken from 
gocv, and the implementation has been highly influenced by gocv 
(maybe it is better to make git submodule it, since gocv project 
is being updated very often?). I admit that it is far from being 
a complete binding, but it is a beginning. I invite you lovely 
and pro dlang community to grow it. I did not want to add it to 
code.dlang.org before it become a better binding.
Apr 04 2019
next sibling parent reply Arun Chandrasekaran <aruncxy gmail.com> writes:
On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş wrote:

 Hi folks!

 D is awesome, but it is a shame that there is no any opencv 
 bindings for d yet. Actually we have it now :) Although I am a 
 new dlang learner, I dared to do it: 
 https://github.com/aferust/opencvd. C interface was taken from 
 gocv, and the implementation has been highly influenced by gocv 
 (maybe it is better to make git submodule it, since gocv 
 project is being updated very often?). I admit that it is far 
 from being a complete binding, but it is a beginning. I invite 
 you lovely and pro dlang community to grow it. I did not want 
 to add it to code.dlang.org before it become a better binding.


Good work.

Can you please mention about the version of Ubuntu you developed 
it on? Also looks like you have committed the cmake temporary 
build directory to git, you may want to git rm. :)
Apr 04 2019
parent Ferhat =?UTF-8?B?S3VydHVsbXXFnw==?= <aferust gmail.com> writes:
On Thursday, 4 April 2019 at 23:53:08 UTC, Arun Chandrasekaran 
wrote:

 On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş 
 wrote:

 Hi folks!

 D is awesome, but it is a shame that there is no any opencv 
 bindings for d yet. Actually we have it now :) Although I am a 
 new dlang learner, I dared to do it: 
 https://github.com/aferust/opencvd. C interface was taken from 
 gocv, and the implementation has been highly influenced by 
 gocv (maybe it is better to make git submodule it, since gocv 
 project is being updated very often?). I admit that it is far 
 from being a complete binding, but it is a beginning. I invite 
 you lovely and pro dlang community to grow it. I did not want 
 to add it to code.dlang.org before it become a better binding.


 Good work.

 Can you please mention about the version of Ubuntu you 
 developed it on? Also looks like you have committed the cmake 
 temporary build directory to git, you may want to git rm. :)


Thank you for appreciation. It is Ubuntu 18.04.2 LTS 64 bit. I 
built opencv 4 from source, it somehow did not create a pkgconfig 
file. I manually created one in /usr/lib/pkgconfig/opencv.pc:

prefix=/usr/local
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib

Name: opencv
Description: The foo library
Version: 4.0.0
Cflags: -I${includedir}/opencv4
Libs: -L${libdir} -lopencv_core -lopencv_imgproc -lopencv_highgui 
-lopencv_imgcodecs -lopencv_videoio -lopencv_video 
-lopencv_calib3d -lopencv_features2d -lopencv_face 
-lopencv_datasets -lopencv_freetype -lopencv_objdetect 
-lopencv_img_hash -lopencv_xfeatures2d -lopencv_tracking
Apr 04 2019
prev sibling next sibling parent reply Paolo Invernizzi <paolo.invernizzi gmail.com> writes:
On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş wrote:

 Hi folks!

 D is awesome, but it is a shame that there is no any opencv 
 bindings for d yet. Actually we have it now :) Although I am a 
 new dlang learner, I dared to do it: 
 https://github.com/aferust/opencvd. C interface was taken from 
 gocv, and the implementation has been highly influenced by gocv 
 (maybe it is better to make git submodule it, since gocv 
 project is being updated very often?). I admit that it is far 
 from being a complete binding, but it is a beginning. I invite 
 you lovely and pro dlang community to grow it. I did not want 
 to add it to code.dlang.org before it become a better binding.


Nice!

Version 3.x has an internal pointer in the mat struct, is that 
changed with 4.x?

- Paolo
Apr 05 2019
parent reply Ferhat =?UTF-8?B?S3VydHVsbXXFnw==?= <aferust gmail.com> writes:
On Friday, 5 April 2019 at 07:56:42 UTC, Paolo Invernizzi wrote:

 On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş 
 wrote:

 Hi folks!

 D is awesome, but it is a shame that there is no any opencv 
 bindings for d yet. Actually we have it now :) Although I am a 
 new dlang learner, I dared to do it: 
 https://github.com/aferust/opencvd. C interface was taken from 
 gocv, and the implementation has been highly influenced by 
 gocv (maybe it is better to make git submodule it, since gocv 
 project is being updated very often?). I admit that it is far 
 from being a complete binding, but it is a beginning. I invite 
 you lovely and pro dlang community to grow it. I did not want 
 to add it to code.dlang.org before it become a better binding.


 Nice!

 Version 3.x has an internal pointer in the mat struct, is that 
 changed with 4.x?

 - Paolo


It still has it, if you what you mean:

Mat Mat_FromArrayPtr(int rows, int cols, int type, void* data){
     return new cv::Mat(rows, cols, type, data);
}
Apr 05 2019
parent reply Paolo Invernizzi <paolo.invernizzi gmail.com> writes:
On Friday, 5 April 2019 at 13:19:22 UTC, Ferhat Kurtulmuş wrote:

 On Friday, 5 April 2019 at 07:56:42 UTC, Paolo Invernizzi wrote:

 On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş 
 wrote:

 Hi folks!

 D is awesome, but it is a shame that there is no any opencv 
 bindings for d yet. Actually we have it now :) Although I am 
 a new dlang learner, I dared to do it: 
 https://github.com/aferust/opencvd. C interface was taken 
 from gocv, and the implementation has been highly influenced 
 by gocv (maybe it is better to make git submodule it, since 
 gocv project is being updated very often?). I admit that it 
 is far from being a complete binding, but it is a beginning. 
 I invite you lovely and pro dlang community to grow it. I did 
 not want to add it to code.dlang.org before it become a 
 better binding.


 Nice!

 Version 3.x has an internal pointer in the mat struct, is that 
 changed with 4.x?

 - Paolo


 It still has it, if you what you mean:

 Mat Mat_FromArrayPtr(int rows, int cols, int type, void* data){
     return new cv::Mat(rows, cols, type, data);
 }


No, I mean that the Mat structure has a MatSize MatStep member 
with pointers to the struct data itself.

Until we have copy ctors, D can't have structures with internal 
pointers, as they can be moved... that's something similar in C++ 
string, if I remember well, and that was the blocker that leaded 
to the copy ctors DIP...

- P
Apr 05 2019
next sibling parent Arun Chandrasekaran <aruncxy gmail.com> writes:
On Friday, 5 April 2019 at 15:52:42 UTC, Paolo Invernizzi wrote:

 On Friday, 5 April 2019 at 13:19:22 UTC, Ferhat Kurtulmuş wrote:

 On Friday, 5 April 2019 at 07:56:42 UTC, Paolo Invernizzi 
 wrote:

 On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş 
 wrote:

 [...]


 Nice!

 Version 3.x has an internal pointer in the mat struct, is 
 that changed with 4.x?

 - Paolo


 It still has it, if you what you mean:

 Mat Mat_FromArrayPtr(int rows, int cols, int type, void* data){
     return new cv::Mat(rows, cols, type, data);
 }


 No, I mean that the Mat structure has a MatSize MatStep member 
 with pointers to the struct data itself.


I was writing a binding to OpenCV 3.x a while ago and now I know 
why I got blocked. :|
Apr 05 2019
prev sibling parent Nicholas Wilson <iamthewilsonator hotmail.com> writes:
On Friday, 5 April 2019 at 15:52:42 UTC, Paolo Invernizzi wrote:

 Until we have copy ctors, D can't have structures with internal 
 pointers, as they can be moved... that's something similar in 
 C++ string, if I remember well, and that was the blocker that 
 leaded to the copy ctors DIP...


That lead to the acceptance of DIP1014 (opPostMove) not 1018. Its 
a move problem not a copy problem.
Apr 06 2019
prev sibling next sibling parent Russel Winder <russel winder.org.uk> writes:
To add to the pool of OpenCV activity, it is worth pointing out that GStrea=
mer
supports OpenCV and D has a binding to GStreamer via GStreamerD which is a
part of GtkD.


On Thu, 2019-04-04 at 23:08 +0000, Ferhat Kurtulmu=C5=9F via Digitalmars-d-=
announce=20
wrote:

 Hi folks!
=20
 D is awesome, but it is a shame that there is no any opencv=20
 bindings for d yet. Actually we have it now :) Although I am a=20
 new dlang learner, I dared to do it:=20
 https://github.com/aferust/opencvd. C interface was taken from=20
 gocv, and the implementation has been highly influenced by gocv=20
 (maybe it is better to make git submodule it, since gocv project=20
 is being updated very often?). I admit that it is far from being=20
 a complete binding, but it is a beginning. I invite you lovely=20
 and pro dlang community to grow it. I did not want to add it to=20
 code.dlang.org before it become a better binding.


--=20
Russel.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Dr Russel Winder      t: +44 20 7585 2200
41 Buckmaster Road    m: +44 7770 465 077
London SW11 1EN, UK   w: www.russel.org.uk
Apr 05 2019
prev sibling parent reply Ferhat =?UTF-8?B?S3VydHVsbXXFnw==?= <aferust gmail.com> writes:
On Thursday, 4 April 2019 at 23:08:21 UTC, Ferhat Kurtulmuş wrote:

 Hi folks!

 D is awesome, but it is a shame that there is no any opencv 
 bindings for d yet. Actually we have it now :) Although I am a 
 new dlang learner, I dared to do it: 
 https://github.com/aferust/opencvd. C interface was taken from 
 gocv, and the implementation has been highly influenced by gocv 
 (maybe it is better to make git submodule it, since gocv 
 project is being updated very often?). I admit that it is far 
 from being a complete binding, but it is a beginning. I invite 
 you lovely and pro dlang community to grow it. I did not want 
 to add it to code.dlang.org before it become a better binding.


Since I could build the library on Windows 10 in addition to 
Ubuntu, I have decided to put it on code.dlang.org: 
https://code.dlang.org/packages/opencvd.
Apr 09 2019
parent reply Andrea Fontana <nospam example.org> writes:
On Tuesday, 9 April 2019 at 17:22:12 UTC, Ferhat Kurtulmuş wrote:

 Since I could build the library on Windows 10 in addition to 
 Ubuntu, I have decided to put it on code.dlang.org: 
 https://code.dlang.org/packages/opencvd.


It sounds interesting. I think you should make those examples 
compilable with dub!

Andrea
Apr 10 2019
parent Ferhat =?UTF-8?B?S3VydHVsbXXFnw==?= <aferust gmail.com> writes:
On Wednesday, 10 April 2019 at 14:44:49 UTC, Andrea Fontana wrote:

 On Tuesday, 9 April 2019 at 17:22:12 UTC, Ferhat Kurtulmuş 
 wrote:

 Since I could build the library on Windows 10 in addition to 
 Ubuntu, I have decided to put it on code.dlang.org: 
 https://code.dlang.org/packages/opencvd.


 It sounds interesting. I think you should make those examples 
 compilable with dub!

 Andrea


Client apps need generated libs in the root folder of app. I 
could not find a solution to copy them automagically yet. Maybe 
dub has a feature doing it. Helps are welcome.
Apr 12 2019