So, I have a project at my job using OpenCV (and it's actually the first project I'm doing with OpenCV) and I have to use stuff like CvSeq to use the SURF algorithm. Since I started to put that in my code, it's a total mess. Apparently, it compiles, but, at least Eclipse, is considering that there's a bunch of errors. All the definitions are messed up.
So, is the problem with Eclipse, or is it that the new header files of OpenCV are just that bad, at least for that part.
I would highly recommend you use the new C++ interface of OpenCV. It will allow you to use vector<KeyPoint> objects, which is far easier to use than CvSeq as I'm sure you've seen. The C++ interface also has far more features than the old C interface.
Here is a good OpenCV sample doing descriptor matching.
Hope that is helpful.
Related
I am decent with Perl, and I've chosen to start learning making GUI interfaces for my Perl programs. That said, I've found it hard to learning how to make a GUI with Qt. I have the bindings from http://code.google.com/p/perlqt4 which seem to be the most recent, but as to how to use them I'm still a bit stumped. All the books and tutorials on the net that I can find are either geared towards using Qt with C++ or with Python.
I'm an absolute Qt beginner and would like to learn how to use it with Perl, but unfortunately the net seems scarce on material for me to use. I can make a GUI design with QtDesigner but don't know how I can fit the code that it generates together with Perl. I can copy the examples from http://code.google.com/p/perlqt4/source/browse/qtgui/examples/tutorial , but those are simple programs withe no accompanying documentation that would allow me to know what is going on or why the code was written that way.
I don't know how Qt or the bindings work but I'd like to learn. Everything that I can find is either obsolete or written for bindings for other languages which I don't understand. I was hoping that some people who've already done this would give me some solid advice or point to some good resources so that I could start learning.
If making a GUI is what you want to do, please consider CitrusPerl that builds on top of wxPerl which is nothing more than a wrapper around wxWidgets. It also makes it very easy to create installers or packagers with the use of Cava Deployment Tools.
TIMTOWTDI
After struggling a further day with the stuff qt4 + perl ..it works in that (stackexchange) way. I use a standard debian wheezy distribution with the packages libqtcore4-perl and libqtgui4-qt etc. Sources from Chris Burel can be found under CPAN or GIT. Regards
Could someone suggest a good library for vector graphics?
Several libraries support drawing shapes, what I need is a library that can save to a vector format.
edit:
I must admit I didn't do enough googling before posting.
cl-vectors seems to be maintained, advanced and documented.
vecto seems to be maintained, advanced-enough and documented-enough interface for it
Still I am used to cl libraries not being what they seem, so if anyone has some personal experience, please share
Besides CL-SVG, CL-PDF seems to be another option.
EDIT: another recommendation
I've looked further into the subject, since I'm interested in this myself, and found one library that supports both saving to files (PS, PDF, SVG, and PNG) and drawing on the screen (GTK2 and X11): cl-cairo2. It seems really the best choice if you need both and aren't already bound to another windowing library.
I have very positive experience with vecto, but I used it for generating PNG files (various graphs). It's quite easy to use and user-friendly. But, as far as I know, it can't save to any vector format.
If you want to write to some vector format, CL-SVG is, probably, the only reasonable choice, but I didn't try it.
love this site and all helpful people! I'm newbie to Xcode and iPhone programming but I've pretty much got the hang of using the SDK to make programs in Obj-C (simple programs right now but make me happy). My experience is web programming (such as PHP and Perl) and I'm not really used to a lot of the new Xcode/desktopy-app stuff like static libraries and linking and such. I be honest, I am not total awesome programmer yet!
I have a problem right now, my (card game) program I am writing needs to use this C library. I don't really understand how I get the proper C files and integrate them into my project so I can start using the commands in that tutorial to evaluate hand values.
I hope I have been clear, please let me know if there is anything I am leaving out. Unfortunately, my newbieness may prevent from me making everything so clear and sometimes I can't english perfectly what I am thinking!
Happy thanks in advance, looking forward to any help!
Couple things:
The library you linked to is quite large. Pokersource appears to be a large C project containing all sorts of things like language bindings and some GUI tools as well. A project that large certainly has an IRC channel. I would recommend going there.
The library you linked to appears to be (I may be wrong about this), licensed under the GPLv3. This means that any program that you distribute to others that uses a GPLv3 library or piece of code must also be licensed under the GPLv3. The upshot is that if you use that library, you'll have to release the source for your game.
The site you linked to does seem to have a long list of other poker hand evaluators, so its possible one of them is suitable for your needs.
Good luck!
it's totally possible to use third party static libraries with your iPhone and using Xcode. This webpage illustrates the process of doing it.
I am working on an academic research regarding some very long functions in the Linux kernel (link, link).
For that research, I would like to use some code flow visualization tool, that would be able to plot a graph in which each vertex is a decision point and each edge is a piece of code which runs in a consequent way.
Do you know of any good, open source project that can visualize C code?
Perhaps a tool like KCacheGrind would be of help. It generates call graphs based on actual calls and cannot pre-generate a call graph without actually running the program, which may not suit your needs, but then it again it may.
History flow's are very neat for changes/diff across multiple versions.
Codeplex has a project, Dependency Visualizer which does support C also.
Gprof2Dot can render oprofile, this would get you dynamic info also.
CodeViz also (static tool) would work.
If your using gcc, gcc-xml has an introspector plugin also todo this.
You appears to want to acquire a flowchart of C source code ("decisions", "code blocks").
Something like this C flowchart?
To do this correctly, esp. for Linux kernal code, I'd expect you to have to preprocess the code first to get rid of macros and conditionals. I would assume that GCC would construct such a graph internally and that you ought to be able to get your hands on that graph.
Doxygen does some amount of 'visualization',
but you need to work on the code a bit for it to be usable.
Another interesting thing to check would be lxr
Linux Cross Referencer is a software toolset for indexing and presenting source code repositories. LXR was initially targeted at the Linux source code, but has proved usable for a wide range of software projects. lxr.linux.no is currently running an experimental fork of the LXR software.
I can recommend Sourcetrail. Can work with a compile_commands.json. Not sure if it's still maintained, though. But it's foss and you can fork it!
Being really new to wx, I'm wondering if there is an IDE (especially for Linux) which would help me lay out a frame or dialog or whatever just to help me see what I'm doing. That means also creating the code for those changes.
I remember way back when using resource compilers for OS/2 and Windows that produced binaries that would then create the window, and was hoping for something similar (though obviously not binary if wx doesn't support that).
I use wxFormBuilder. It is written in wxWidgets, so it works on Linux quite well. It can generate C++ code or XRC files. Make sure you understand its philosophy, and use it like this:
generate C++ code for the GUI
don't edit the code wxFormBuilder generated, but create new files
in new files, derive new classes from the classes it generated
implement event handlers in you own class (wxFB creates virtual function for each event handler you wish to use)
I usually name the wxFormBuilder generated classes/files like, for example, MainFrameGUI, and one with implementation (derived one in which I write all my code) would be just MainFrame. This enables you to change the visual layout and regenerate C++ files from wxFB at any time without overwriting your code.
DialogBlocks works quite well for me, although sometimes you need to edit the code to fix errors manually. It has a property editor that seems advanced enough.
Just another options is wxGlade. It does not have the that much features as the others mentioned seem to have, but it works just good enough for me to not daring to switch.
I use Code::Blocks IDE from http://www.codeblocks.org which has
- built-in GUI editor
- Cross compilable, so you can use it under Linux, OSX and Windows.
But I still use wxFormBuilder with it instead of built-in wxSmith editor. But they are compatible with internal wxSmith.
For windows you've got "wx-devcpp" which is Blodsheed Dev C++ with some addons providing what you looking for
Here is project page
http://wxdsgn.sourceforge.net/