I've been modifying an example C++ program from the Caffe deep learning library and I noticed this code on line 234 that doesn't appear to be referenced again.
::google::InitGoogleLogging(argv[0]);
The argument provided is a prototxt file which defines the parameters of the deep learning model I'm calling. The thing that is confusing me is where the results from this line go? I know they end up being used in the program because if I make a mistake in the prototxt file then the program will crash. However I'm struggling to see how the data is passed to the class performing the classification tasks.
First of all, argv[0] is not the first argument you pass to your executable, but rather the executable name. So you are passing to ::google::InitGoogleLogging the executable name and not the prototxt file.
'glog' module (google logging) is using this name to decorate the log entries it outputs.
Second, caffe is using google logging (aka 'glog') as its logging module, and hence this module must be initialized once when running caffe. This is why you have this
::google::InitGoogleLogging(argv[0]);
in your code.
Related
The Point Cloud library comes with an executable pcl_hdl_viewer_simple that I can run (./pcl_hdl_viewer_simple) without any extra arguments to get live data from a Velodyne LIDAR HDL32.
The source code for this program is supposed to be hdl_viewer_simple.cpp. A simplified version of the code is given on this page which cannot be compiled readily and requires a tiny bit of tweaking to make it compile.
My problem is that the executable that I build myself for both the versions are not able to run. I always get the smart pointer error "Assertion px!=0" error. I am not sure if I am not executing the program in the correct way or what. The executable is supposed to be executed like
./hdl_viewer_simple -calibrationFile hdl32calib.xml -pcapFile file.pcap
in case of playing from previously recorded PCAP files or just ./hdl_viewer_simple if wanting to get live data from the real sensor. However, I always get the assertion failed error.
Has anyone been able to run the executables? I do not want to use the ROS drivers
"Assertion px!=0" is occurring because your pointer is not initialized.
Now that being said, you could initialize it inside your routines, in case the pointer is NULL, especially for data input.
in here, you can try updating the line 83 like this :
CloudConstPtr cloud(new Cloud); //initializing your pointer
and hopefully, it will work.
Cheers,
I want to extend my application, which is written in C++ using python scripts (extensions). I originally wanted to use TCL for that, just like they do in xchat, for example, but later I decided to use python, because it seems to be quite popular for whatever reasons.
However, I am failing to load and execute even very simple python script. I followed http://docs.python.org/2/extending/embedding.html
When I give a filename of script that I want to load as argument to pName, the error I get from PyErr_Print is: ImportError: Import by filename is not supported.
Reading the documentation, I figured I might need to run PyImport_ExecCodeModule, however this C function requires 2 arguments, 1 is char * (probably a name of module), other one is compiled python code, which according to docs I can get by calling python function compile(). Unfortunately it doesn't say how do I call this python function using C api's in my C++ code. Ideally I would imagine to do something like
PyObject *code = PyCompile("print (\"hello :)\"");
but I couldn't find any function like PyCompile, neither any other C-api function that would simply allowed me to execute python internal function (like compile) and grab its output as PyObject.
So, question is: how can I easily load a python script from a file (something.py) and execute it within my application using the embedded python interpretor?
I have a problem related to passing arguments to a C++ compiled executable. The program emulate the behaviour of a particular inference engine: the setup of the engine is load at runtime from an XML file, and then I want to call it from command line with different input values.
The characteristic of the input are:
Every time that I call the program, the input structure is different, because the system itself is different.
The input is a set of couple {name, value}, one for each part of the system.
I have to separate the configuration XML from the input.
I call the program from a PHP or Node.js server, since it return a result that I expose to the outside through an API.
Input value are obtained from an HTTP post request.
By now I have tried these solutions:
Pass it from the command line ex: "./mysoftware input1 value1 input2 value2 ...etc". A little unconfortable, since I have up to 200 input.
Create a file with all the couples name,value and then call the program that parse the file and then destroy at the end. This is a bottleneck of performance for my API, because at every call I have to create and destruct a file.
Does anyone know a better way to approach this problem?
3. Pass the values to the program via the standard input stream and read them from std::cin inside your C++ program.
I have reinstalled emacs 24.2.50 on a new linux host and started a new dotEmacs config based on magnars emacs configuration. Since I have used CEDET to some success in my previous workflow I started configuring it. However, there is some strange behaviour whenever I load a C++ source file.
[This Part Is Solved]
As expected, semantic parses all included files (and during the initial setup parses all files specified by the semantic-add-system-include variables), but it prints this an error message that goes like this:
WARNING: semantic-find-file-noselect called for /usr/include/c++/4.7/vector while in set-auto-mode for /usr/include/c++/4.7/vector. You should call the responsible function into 'mode-local-init-hook'.
In the above example the error is printed for the STL vector but a corresponding error message is printed for every file included by the one I'm visiting and any subsequent includes. As a result it takes quite a long time to finish and unfortunately the process is repeated any type I open a new buffer.
[This Problem Is Solved Too]
Furthermore it looks like the parsing doesn't really work as when I place the point above a non-c primitive type (i.e. not int,double,float, etc) instead of printing the type's definition in the modeline an error message like
Idle Service Error semantic-idle-local-symbol-highlight-idle-function: "#<buffer DEPFETResolutionAnalysis.cc> - Wrong type argument: stringp, (((0) \"IndexMap\"))"
Idle Service Error semantic-idle-summary-idle-function: "#<buffer DEPFETResolutionAnalysis.cc> - Wrong type argument: stringp, ((\"fXBetween\" 0 nil nil))"
where DEPFETResolutionAnalysis.cc is the file & buffer I'm currently editing and IndexMap and fXBetween are types defined in files included by the file I'm editing/some file included by the file I'm editing.
I have not tested any further features of CEDET/semantic as the problem is pretty annoying. My cedet config can be found here.
EDIT: With the help of Alex Ott I kinda solved the first problem. It was due to my horrible cedet initialisation. See his first answer for the proper way to configure CEDET!
There still remains the problem with the Idle Service Error (which, when enabling global-semantic-idle-local-symbol-highlight-mode, occurs permanently, not only when checking the definition of the type at point).
And there is the new problem of how to disable the site-wise init file(s).
EDIT2: I have executed semantic-debug-idle-function in a buffer where the problem occurs and it produces a ~700kb [sic!] output. It looks like it is performing some operations on a data container which, by the looks of it, contains information on all the symbols defined in the files parsed. As I have parsed a rather large package (~20Mb source files) this table is rather large. Can semantic handle a database that large or is this impossible and the reason of my problem?
EDIT3: Deleting the content of ~/.semanticdb and reparsing all includes did the trick. I still need to disable the site-wise init files but as this is not related to CEDET I will close this question (the question related to the site-wise init files can be found here).
You need to change your init file so it will perform loading of CEDET only once, not in the hook that will be called for each .h/.hpp/.c/.cpp files. You can change this config as the base, and read more in following article.
The problem that you have is caused because Semantic is trying to analyze header files, and when it tries to open them, then its initialization routines are called again, and again...
The first problem was solved by correctly configuring CEDET which is discribed on Alex Ott's homepage. His answer solves this first problem. The config file specified in his answer is a great start for a nice config; I have used the very same to config CEDET for my needs.
The second problem vanished once I updated CEDET from 1.1 to the bazaar (repository) version, which is explained here and in Alex' article. Additionaly one must delete the content of the directory ~/.semanticdb (which contains the semantic database and was corrupted I guess).
I'd like to thank Alex Ott for his help and sticking with me throughout my journey to the solution :)
I have a C++ program which is mainly used for video processing. Inside the program, I am launching the system command in order to obtain pass the processed videos to some other binaries to postprocess them.
I have a while loop towards infinite and I am launching the system command inside the loop every time. The thing is that at a certain point I am receiving the -1 return code from the system command. What could be the reason for that?
Inside the system command I am just calling a binary file with the adequate parameters from the main project.
The system command which I want to execute is actually a shell file.
In this file I am extracting the main feature from the video and passing them through a SVM model from a 3D party library in order to obtain the the desired classification.
./LiveGestureKernel ./Video ./SvmVideo
./mat4libsvm31 -l SvmVideoLabels < SvmVideo > temp_test_file
./svm-predict temp_test_file svm_model temp_output_file
cat < temp_output_file
rm -f temp_*
After a certain number of iterations through the while loop, it just won't execute the script file and I cannot figure out the reason for this. Thanks!
If you get -1 from the call to system(), you should first examine the contents of errno - that will most likely tell you what your specific problem is.
The one thing to watch out for is that the return value from system is an implementation-defined one in the case where you pass it a non-NULL command, so it's possible that -1 may be coming from your actual executable.
Your best bet in that case is to print out (or otherwise log) the command being executed on failure (and possibly all the time), so that you can check what happens with the same arguments when you execute it directly from a command line or shell.