highgui and fork()
Hi all! I'm using OpenCV in a project at work, I won't enter in details because the algorithm is irrelevant for my problem. The thing is, my program uses one or more processes as it listens on a socket...
View ArticleHow to implement a pre built template for use with TLD?
I have successfully implemented TLD in openCV. Is there anyway I can train the detector once, save what it learned on to a file and then use the file to initialise the tracker at some other point of...
View ArticleDetecting objects with a certain surface area
Hi guys, I'd like to detect small but undefined shapes with a certain value of surface area, say 25 pixels worth. Now, I tried coding by calculating an array of pixels with adjacency but it seems...
View ArticleUndefined reference to TIFFReadDirectory@LIBTIFF_4.0
Hi there, I am running opencv 2.4.8 compiled from source with the following options enabled in cmake: ``` cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D...
View ArticleOpenCV 3.0 parallel_for_
Hello, I've implemented a parallel image descriptor extractor using opencv 3.0 parallel_for_ and BRISK descriptor extractor. What I do is to split the image into horizontal stripes and compute the...
View ArticleSegfault in SimpleBlobDetector::findBlobs
#Update with full code example showing the problem: I made a simple version of the program which exhibits exactly the same problem, and I've uploaded the simple code and an image which causes it to...
View ArticleA way to count how many people have been detected in faceDetect.cpp
I am running the code faceDetect.cpp , i need to count how many people are beign detected , i can detect how many people are in in the same frame by incrementing a variable for each face detected but...
View ArticleOpenCV 3.0 build problem
when i build OpenCV 3.0 on Windows7 with gcc I get this interruption [ 52%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_dshow.cpp.obj...
View ArticleInstall OpenCV 3.0 Extra Modules in WinPython
How do I install the OpenCV module opencv_contrib in WinPython? The build procedure for OpenCV looks way too complicated to be successful on my computer. I could not even install Python successfully (I...
View ArticleOpen cv cannot open PDB
I'm new to opencv. When I compile my opencv code it gives me the following error. 'ConsoleApplication2.exe' (Win32): Loaded 'C:\Windows\System32\avifil32.dll'. Cannot find or open the PDB file....
View Articleunable to understand this finger counting code
hi, can anybody explain me this code: this code is for counting number of finger. this is the input image  // feature extraction.cpp : Defines the...
View Articleis there any function equivalent to "Mat::at" in oclMat?
I need to read the pixel by pixel value of oclMat. Kindly share any sample code if it has to be called in a different way.
View ArticleInitialise a tracker without a bounding box
How can one initialise a tracker with an image instead of drawing a bounding box around the object of interest every time?
View Articleadd specific module to python api
Hello, it seems like not all the opencv modules are available in the Python bindings. I am specifically interested in tracking from opencv_contrib. Is there a simple way to add it to the API?
View ArticleMeasuring vehicle speed
Hi, What is the best algorithm to determine the speed of the car? Top 200 km. My camera support 60 frame per second. Many Thanks.
View ArticleGFTTDetector and calcOpticalFlowPyrLK
Hi, Previously I was using good [featuresToTrack](http://docs.opencv.org/3.0-beta/modules/imgproc/doc/feature_detection.html#goodfeaturestotrack) and...
View ArticleLowest Latency with java and OpenCV
I'm using opencv 3.0 on Java, and I want the lowest LATENCY possible. I'm grabbing images from DirectShow of Windows 8 (connected to a BlackMagic Intensity Pro USB 3.0). How can I do it? What...
View ArticleHow to set CV_CAP_PROP_FORMAT in OpenCV 3.0 and JAVA?
The first question is in the title,and the second one is: how can I set also the property CV_CAP_PROP_MODE? I tried but seems do not work..
View ArticleROI to detect eyes
Hi In the following code I'm trying to detect faces and pass a rectagle as ROI to detect eyes it is not working I need some help to tune it. When I run it this error is displyed Unhandled exception at...
View ArticlestereoRectify problems
Hi. I'm working with SFM results. I've calculated orientation params for each camera, undistorted images and selected some stereopairs. Now I would like to calculate rectification for each stereopair....
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