traincascade false positives
I'm trying to train classifier to recognize cars on a video from static camera pointing at the street. As my negative samples i'm using parts of the frames from a video, that don't contain any car....
View ArticleHow to use Edge Orientation histogram for object detection?
I am working on an object detection code and I chose the edge orientation histogram as a descriptor for the matching. I am facing a problem in the back projected histogram as i don't seem to have a...
View ArticleInformative websites related to OpenCV
i think it will be useful if we add links of informative websites related to OpenCV here. Lets create a list together. - [Nullege is a search engine for Python source...
View ArticleErros whe uninstalling opencv 2.4.10
Hi , i want to uninstall opencv 2.4.10 from ubuntu 14.04 and install opencv 3.0.0 i have enter to the build directory where i have install from opencv with cmake . so when running > sudo make...
View ArticleNull object reference while trying to show image on emulator, OpenCV4Android
Hi! After installing Android Studio and setting up the OpenCv4Android 3.0, I tried to run a simple application which purpose was to read a image from the emulators hard disk and then show it in the...
View Articleload multiple images from a single folder
Hi everyone, I'm using **opencv** and **C++** and I need to load multiple images from a single folder. In particular, I want to store images in a **Vector** object using **push_back** method. Can...
View Articleread a saved video file in android studio using opencv4android
Hi, Iam doing a project which finds the features in the video of a room. Currently Iam doing hough transform and edge detection. Iam able to do this in real time using opencv4android in android...
View Articletrain cascade larg offset
Hi, i create the .xml file with train cascade algorithm. with command ""detectMultiScale"" , i find the object but this object has large offset . how can i reduce the offset in the around object?...
View ArticleSample calibration.cpp wrong lines?
Hi, I start working on calibration using [sample calibration.cpp](https://github.com/Itseez/opencv/blob/master/samples/cpp/calibration.cpp#L556). I have copied following line for my own example and I...
View Articlemouth detection fails
 I'm using opencv and C++. Face, eyes and nose detection work very well, but I have some problem with mouth detection. Defining the rectangle using...
View ArticleDocumentation pages extremely slow
I'm noticing that docs.opencv.org is behaving very badly-- I get load times that would be appropriate for dialup, if the pages ever load at all. It took me 30 minutes to download the 11Mb tutorial pdf...
View ArticleComparing Same object for small differences
[Img1](http://imgur.com/5ipP0XK) [Img2](http://imgur.com/gQLt4nQ) Hello, I was wondering what are the best methods in detecting the small shift difference in these two objects? thank you.
View ArticleObject detection, Kinect Depth images
Hi. I've been working with OpenCV for a while now. Both native OpenCV (C++) and emgu (C#) I want to recognize one or more "objects" in an image. This time it's a depth image from a kinect sensor. If...
View Articleflann surf matching error
Hi i tried the tutorial opencv surf but i get error descriptor empty. I want to skip the frame which gives empty descriptor. after trying a few approaches, it still keep terminating the process...
View ArticleUbuntu: glib Error while creating new windows via OpenCV
I am trying to write a program to display an Image using OpenCV library. The code compiles fine. But when I execute the code it gives some error. I have posted my code and the error message also. This...
View ArticleWebcam 'sync' artifacts
Hello, I made a loop reading frame from a webcam (logitech Live! Pro), and about 30 second later, i got terrible artifacts, like the webcam is not ready to give the picture....
View ArticleError installing opencv 3 with extra modules
I am trying to install opencv 3 from source and tried to include extra modules in order to use their python bindings I set the varibales OPENV_EXTRA_MODULES_PATH to D:/opencv_extra/modules and press...
View ArticleOpencv: train cascade image reader
i try to training a classifier, i have create a file .vec whit create sample and it's ok.> Info file name: C:\OpenCV\positive.txt> Img file name: (NULL)> Vec file name:...
View Articlelicense plate cropping
I would like to crop only the numbers out from license plate. I have tried using bounding box but it is not detecting it. What other methods can I use to crop it out so that I can remove noises....
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