According to the release docs for OpenCV 3.0.0, it includes an implementation of the Tracking-Detection-Learning algorithm. There's even some very basic docs for the C++ code.
I downloaded and compiled the 3.0.0-beta, including the Python wrapper, and it seems to have succeeded, and although I can run the Python samples, I can't find any way to access and TLD functionality through the Python wrapper. I can't even find references to it in the code.
Is it actually included in the 3.0.0 release, and if so, how do I access it?
From what I find so far there is no instruction, explicitly telling the user how to use TLD. But, you can access TLD tracking modules just by changing the parameter For instance: cv2.Tracker_create("TLD")
For a demo, you can try https://github.com/Itseez/opencv_contrib/blob/master/modules/tracking/samples/tracker.py and change the like cv2.Tracker_create("MIL") to cv2.Tracker_create("TLD")
Note: you must install opencv along with opencv_contrib to make this demo work.
Good Luck
the tld c++ code for opencv3.0 is in the opencv_contrib repo,
unfortunately, atm python or java wrapping is not ready yet.
Related
I'm trying to run a face detection model in Unity. It gets input from the webcam, then spits out a face. But trying to make this work with C# has been an absolute nightmare. And despite all my suffering, I still haven't been able to make it work!
If I could use python, I'd be able to get it done easily. So, obviously, I want to find a way to get a python script working in Unity. But IronPython is the only thing I've been able to find, and it's outdated.
I need either knowledge of how to make IronPython work in spite of being outdated, or some other method. Please.
Unfortunately, Unity at this time does not support Python. Although, there is an asset that you can use a bit of Python with. I am not sure what you can do with this asset but I know it could help a minimal amount:https://assetstore.unity.com/packages/tools/integration/python-interpreter-645
Quick Note: Most programming languages work about the same way. If you figure out the documentation and grammar/punctuation for C#/UnityC#, you should be off just fine.
I try to use python once on Unity and I found a few ways:
There is a package call "IronPython" where you can add a python file to your unity project and then call a function from C# to your python code, to do that you should follow this:
We already know that we can use python to use .net internal calls.
Now we may use the same to start a console that can accept a scripting language in Unity engine.
To do this we have to include certain dll files.
These dll files must be present in Assets>plugins
IronPython.dll
IronPython.Modules.dll
Microsoft.Scripting.Core.dll
Microsoft.Scripting.dll
Microsoft.Scripting.Debugging.dll
Microsoft.Scripting.ExtensionAttribute.dll
Microsoft.Dynamic.dll
Once the Plugins are in place.
Initiate the Cs code
PythonEngine engine = new PythonEngine();
engine.LoadAssembly(Assembly.GetAssembly(typeof(GameObject)));
engine.ExecuteFile("Test.py");
Where test.py is the python code.
Initiate python side:
import UnityEngine from UnityEngine
import *
Debug.Log("Hello world from IronPython!")
References:
https://github.com/cesardeazevedo/Unity3D-Python-Editor
http://techartsurvival.blogspot.in/2013/12/embedding-ironpython-in-unity-tech-art.html
IronPython in Unity3D
the issue with this way is that most of the python module are not supported.
2.the second way is to create a file like json that contain the data you want to send to the json and then create an output json that send the output from the python script, this way is very limited with what you can send because the data must be contain in your json.
the last way that work for me is to install the Nuget package and copy the script from python to c# line by line with the relevent module installed in Unity and it's work for me, but copy a long code can take time.
this is a reference to the package:
https://github.com/GlitchEnzo/NuGetForUnity
and then to install the relevent package you should press on NuGet → Manage NuGet Packages and the choose the relevent package(for me it was Numpy and it work grate).
hope it will help you
I don't know how recent it is but there is a Unity package for python available on unity 2019.3 and further versions.
Warning the first versions of this package can't use Python3.
You can see more for yourself by the following link.
https://docs.unity3d.com/Packages/com.unity.scripting.python#2.0/manual/index.html
I hope this may help you.
We are thrilled to announce that Python for Unity 4.0.0-exp.5 is now available!
4.0.0-exp.5 is a major upgrade from our last public release, and incorporates a large number of changes. In summary:
Based on Python 3.7; scripts based on Python 2.7 will need to be ported.
Users no longer need to install Python on their system.
In-process Python is no longer reinitialized when the Unity domain reloads.
Removed the out-of-process API. The PySide example now runs in-process and is much simpler.
Limited support for a virtual environment workflow via the ProjectSettings/requirements.txt file.
Many bug fixes.
Documentation for the Python for Unity package is available here, and the full changelog can be found here.
This is an experimental release, and thus is not visible in Package Manager. To install this package, open Package Manager, click the + at the top left and select Add package by name.... Enter com.unity.scripting.python as the name and and 4.0.0-exp.5 as the version and click Add. Alternatively, you may edit Packages/manifest.json and add "com.unity.scripting.python": "4.0.0-exp.5", to the list of dependencies, or edit the existing entry for Python for Unity to update the version.
Soursce: https://forum.unity.com/threads/python-for-unity-release-announcements.1084688/
Documentation: https://docs.unity3d.com/Packages/com.unity.scripting.python#4.0/manual/index.html
Unity not supported python, But you Can write Python Code and run it by Socket programing, Create Server with python and send data,in C# Connect to server and use data sended with python.
Whenever i try to pip install pyleargist, it gives me this issue.
Is there a version compatible with python 3 ?
Can someone help on this ?
The library was last updated in 2012, see the pypi page and as you already noticed, the issue you are seeing is based on the fact that it was written for python 2. In this case, file seems to be used in the setup.py, which was removed in python3. For this exact library, it seems to be stale, so no other versions.
You have two options:
It does not look to be a large library, you could download the source code from pypi and try to fix the python 2/3 issues.
Search for another library. A google search shows several options for python libraries that can compute the GIST descriptor. Just look for another one that fits your requirements
I have tried looking around the source code of the Python bindings and haven't been able to find where and how exactly the call is made (where Python connects to C++). I have also searched the web quite a bit, without luck, but it may be that I'm not using the right vocabulary for the search. Using trace in Python was also not as illuminating as I had hoped. Any nudge in the right direction is much appreciated.
Tensorflow used SWIG to do the bindings, but now they are moving into using pybind11.
Inside the code, you can search for PYBIND11_MODULE to find where the new bindings are made. The C++ code compiles to a library file, .so for example on Linux, which can be loaded directly by python.
To learn more about the new and the old method you can check this RFC.
I wanted to use OpenCV with Python, so I downloaded OpenCV for Windows and got a folder of ~3.7GB after decompression. What surprised me was that the only file I needed was cv2.pyd, which was so small (~11MB) comparing to the C builds (~674MB). I simply copied it to my Python lib-packages folder without adding anything to my PATH and it worked perfectly.
I don't know how Python binding works, and I thought it should call C/C++ implementations under the hood. However, cv2 did not seem to require any C/C++ library. It just looks like magic to me.
Most likely it has something to do with static linking and using all possible tricks found in "Reducing Executable Size" or "GCC x86 code size optimizations"
OpenCV uses cmake as build system, which provides "MinSizeRel" build type. It seems to auto-apply most of those tricks. Couldn't find any good documentation on that, hence: [citation needed]
(follows my original answer which didn't quite address the actual question)
More convenient way to get opencv for python may be to download it from: http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv
After running installer you'll find cv2.pyd in c:\python27\lib\site-packages
As far as we are concerned .pyd file is same as .dll: http://docs.python.org/2/faq/windows.html#is-a-pyd-file-the-same-as-a-dll
Which means that we can use Dependency Walker to look into it. This is what we see:
This picture means that cv2.pyd is dynamically linked against opencv libraries which contain actual functionality. These take around ~45MB of disk space.
I am trying to use VTK from python. I tried to find and could not realy find anything on the web which can be used for documentation. I tried looking at the c++ documentation but the methods are very different.
Thanks a lot
You could see the python examples at VTK's wiki. There is another resource by going to the official nightly documentation and looking for a particular class; in the section examples for many (not all) classes you can find implementations in python (also in c++ and tcl). A third option is to go to the source folder of your last downloaded release of VTK; look for the folder "Examples", there you will also find different VTK implementations in python (besides C++ and tcl)
I recommend you use Mayavi and TVTK from Enthought, the API is much pythonic:
http://code.enthought.com/projects/mayavi/
On the VTK website you can find the VTK User's Guide. It is pretty thorough.