when i run opencv_createsamples command on ubuntu server it says "invalid...
my bg.txt file contains paths like :- neg/1.jpg neg/2.jpg etc
View Articlehow can i train SVM
I am new to this. I am trying to do machine learning on vehicle color recognition system. Can i know some useful links to learn about SVM training? I have watched some videos and red some stuff about...
View Articleusing OpenCV to find the seletected ball's center in python
Hi everyone, I'm a beginner and trying to use the basic OpenCV to find the choose color ball's center x,y value from the image. But When I try to run my program there had some error happen but I had...
View Articleerror LNK1104: cannot open file 'opencv_calib3d310d.lib'...
i have vs 2013 proffesional and using opencv3.1.0 i setup everything properly but while compiling this error occurs Error 1 error LNK1104: cannot open file 'opencv_calib3d310d.lib'...
View Articlefeature2d_manual.hpp modifications don't take effect
I am trying to use BRIEF descriptor in OpenCV 3.1 for andoid. In order to achieve that OpenCV has to be built from source with _contrib. So I compiled it without errors and could also see BRIEF.cpp.o...
View ArticleBuild opencv 3.1.0 extra module for android on Mac?
Hi, I'm new to OpenCV and want to use SIFT and SURF features detector on Android Studio that is available on opencv_contrib. I'm using these tutorial (with modification) to build opencv 3.1.0 extra...
View ArticleOpencv 3.1 DNN module in Contrib : How train a new model?
I have tested the DNN module, and it easy to import Caffe or Torch models, but I din't find any thing about new model traning. Any one have an idea about it? Or this module is just an Cafe or Torch...
View ArticleObstructed Rectangle Detection
Hi, I am trying to detect 4 corners of a regular paper sheet. i have tried all the ways canny/sobel/polygon detection/line detection they all work fine if and only if the whole paper is visible if one...
View ArticleHow do I add opencv_contrib to an existing homebrew installation
I have opencv3 installed using homebrew. I don't have the opencv_contrib modules installed, so obviously didn't use the --with-contrib flag. How can I now use homebrew to add the opencv_contrib modules...
View Articlevideo writer does not allow a string variable ?
Video writer gives me empty containers messages and such on mac if i do not specify a constant literal myself, i.e. "test". If i give it a string variable, it won't write. This is making it difficult...
View ArticleHow to detect a face and extract its coordonates to use the coordinatesw
I want to detect a Face and know how far is it from the middle of the screen. I will use this to move the camera to return the face to middle of the screen
View ArticleJavaCV - LogPolar or LinearPolar
Is logPolar or linearPolar in the Opencv Java API? I've looked but I can't seem to find it.
View ArticleMoving OpenCV to another folder breaks it
Here is a weird thing. I am calling OpenCV 2.4.9 from Java (on Peppermint Linux 3). It works fine. But, when I rename the OpenCV installation directory (and of course the reference to the directory in...
View ArticleTrouble compiling 3.0 & 3.1 under Debian 8 "jessie"
It appears that the failure occurs when attempting to compile the videoio modules. In particular, the gstreamer 0.10 headers fail to be successfully parsed because of object definition errors. The...
View ArticlePLEASE provide static libraries for Linux 32 bit
Hi OpenCV experts, I REALLY REALLY would like to urge someone within your ranks to provide: = OpenCV as a simple tarball of portable .so files = which, after unpacking on *any 32 Bit Linux system*, can...
View ArticleError while compiling opencv with contrib
I get following error when I try to compile opencv_contrib with opencv3.1 on my mac with OS X El Capitan 10.11.6. How do I resolve the error? [ 97%] Generating pyopencv_generated_include.h,...
View ArticleInstall OpenCV from source using Visual Studio 2015
Is it possible to install OpenCV from source using VS 2015? CMake doesn't appear to have a specific version to support 2015. I tried to point it to a specific compiler on system... ![image...
View ArticleGetting better background subtraction
I am trying to generate a mask of hands typing at a keyboard, by analyising every frame of an incoming video. Here is an example of the setup (with some debug info ontop): ![image...
View ArticleDebayer 16 bit with the MHC algo using CUDA
Hi, With OpenCV 3.1.0 I'm trying to use the cv::cuda::demosaicing function: cv::cuda::demosaicing(bayered, debayered, cv::cuda::COLOR_BayerGB2BGR_MHT); The documentation states that: > **src**...
View ArticleVIDIOC_DQBUF: No such device and VIDIOC_QUERYMENU: Invalid argument
Hi I am use Logitech Webcam C270 connect to ODROID xu4(arm single board computer) installed ubuntu 14.04. Also opencv 2.4.8 installed. When I run my code, first it's working and I can see the video...
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