Need to detect objects in a Video stream
Hi, I am literally new to the Open CV technology. I spent few days on the basics of the Open CV. But as I need to kick start my work, which is to detect only a particular object (like a human) in a...
View ArticleOpencv Chamfer Matching Error in Results
Hi folks! I really need help in this one... I've been working on edge-based template matching and happened to find chamfer matching. I've been trying to work at this on my own but I think my knowledge...
View Articleopencv mat object thread safety
There is some ambiguity about this issue. Some answers here and at stackoverflow say that mat object has some thread safety, while others say that it's not thread safe. Most of those questions about...
View ArticleError building OpenCV 3.0.0 with FFMPEG
Hello, This is my first question on this forum. I have been using OpenCV for a while. However I have recently changed my system to a cluster where I do not have any admin permission. The problem is...
View Articlevideocapture.read() returning black frame if camera did not have time to...
Hi, I am currently working on a camera capture project. The problem is, even though camera gets opened correctly, sometimes the cap.read(frame) returns a black frame. After some tests, I noticed that...
View ArticleJava program Opencv unsatisfiedlinkerror
I have a java application designed to run in the Linux environment, developed using Opencv and Eclipse - Ubuntu 14.04. It runs fine inside Eclipse and produces a .jar on export. The program .jar works...
View ArticleHow to record the time of stay by detected people in a video?
Hello everybody, Imagine a very easy scenario: Two people staying in a video without any intersection/overlap. I want to record the time of their stay in the video seperately. Would you recommend to do...
View ArticleUnhandled exception (opencv_world300.dll)
Hi there, I'm quite new to OpenCV and although I'm having fun learning it, I also have a problem which only occurs occasionally. I've opened up a USB microscope and I want to be able to capture still...
View ArticleHow can I store a char[] in Matrix Object in OpenCV Java?
Hi, I have unsigned data stored in a char[]. The code is: Mat mat1=new Mat(); mat1.create(640, 512, CvType.CV_16UC1); mat1.put(0, 0,chararr); However, put() function does not support this conversion....
View ArticleHow to draw a rectangle contours only if largest than specific size
This is i get just now, it will detect and draw rectangle at the 2 largest object, the problem now is it will draw a rectangle when the object is small than the size i want but is the first/second...
View ArticleNormalized camera / image coordinates
Hello, I have been reading about calibration and Id like to ask what is the difference between a normalized image coordinate and a normalized camera coordinates and what are their significance ?...
View ArticleHelp building OpenCV 3.0 with CUDA 7.0 and VS2012
I am using OpenCV 3.0 with CUDA 7.0 and VS2012 c++/cli on a Win 8.1 64 bit machine. I also have CMake 3.0.1. Previously, I was able to build OpenCV 3.0 and everything worked fine. Now, I cannot...
View ArticleOpenCV Build process warning : field of class type without a DLL interface...
I just installed CUDA 7.0 and generated the **OpenCV** makefiles for **VisualStudio 2013 x64** through CMake. While building in the Debug configuration in VS2013, I have tons of warnings like these...
View ArticleExtract camera position
Hi Given a set of points in world coordinates lying around a field, how do i extract the **POSITION in XYZ of the camera** ? Help thanks EDIT: I read a paper...
View ArticleWhy is opencv's Template Matching method TM_SQDIFF so fast?
I have tried implementing my own code for the Sum of Squared Differences (SSD) for my template matching using the algorithm given in...
View ArticleI am a new in programming and opencv as well, I would like to learn it in a...
i have this ""opencv_ffmpeg249.dll"" when i try to read video
View ArticlegoodFeaturesToTrack on a submat
I am using the goodfeaturestotrack function of opencv and I want to only search for features in a ROI. I have set the ROI as newSubMat then ran goodfeaturestotrack. I now want to copy the points back...
View ArticleInstall and run tesseract OCR in visual studio 2013 and opencv 3
Hello community, I hope you're all well. I noticed opencv 3 has a library for the tesseract ocr (Scene Text Recognition) and I was wondering how to call it and use it. I have downloaded and installed...
View ArticleCan't create lib files with CMake
I'm using OpenCV 3.1.0, Cmake 3.4.1 and Visual Studio 2013. I'm trying to build libraries and following all steps exactly the same as tutorials but at configuration step at CMake there is no option...
View Articleknowhold the weight in your fingertips relax
knowhold the weight in your fingertips relax arrests as youcan see it's a lot a bicep muscle of lot about the congregation folks and 2003 says that one set which are mostly no one set consist of doing...
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