Displaying multiple images
Hi All, i tried to update an outdated [sample code on opencv/wiki](https://github.com/Itseez/opencv/wiki/DisplayManyImages) The changes I have made up to now are as follows. #include #include using...
View Articleis it possible to apply convolution in multiple dimensions?
I would like to know if there is any function to apply convolution in more than 2 dimensions in Opencv. I know that there is the `filter2d()` but this one is limited in 2d right? So I was wondering if...
View ArticleHow to get OpenCV to store HSV in Matlab notation [0-1]?
I am working on transferring a working Matlab project to C++/OpenCV, but I'm encountering a problem while converting from BGR to HSV, since the project is intended to work with small numbers that...
View ArticleUpdate Yourself with Changing Technology Trends
Maintaining existing engineering traits is essential. After all, you don't desire to be put aside when everyone you know is utilizing the latest device, or working on the newest machine. That's why...
View ArticleDon’t Fall For This Virus Removal Scam
Here are steps to secure your PC from malware. Run regular scans with registry cleaner software. Almost all of these unwanted programs target devices running Microsoft Windows. Often this is because...
View Articlegrab and process multiple frames in different threads - opencv semi-related
Well as the title says I would like to grab and process multiple frames in different threads by using a circular buffer or more, I hope that you can point me to what is better. For grabbing frames I am...
View ArticleCalculation of TM_CCOEFF_NORMED for template matching
This template image below gives always 1.0:  best matching result in every source image. @pklab said...
View ArticleWrite an OMR scanner android application
I am new to OpenCV and Image Processing in general. I want to create an application that can scan an OMR sheet and figure out the selected answer (filled circle) Could someone give me pointers towards...
View ArticleWhat is the best method for getting ROI of an eye?
I was able to create already an eye detection application real time and static image using the OpenCV face detection sample. But sometimes it gives false detection and it can't detect faces in...
View ArticleOpenCV4Android 3.1.0 JavaCameraView FullScreen and Portrait
I am very new to OpenCV, trying it for the first time. I ran the Tutorial3CameraControl, camera preview was fine portrait and full screen, when I integrate the same code in my project, I somehow get...
View ArticleCalculating Z axis of tracked image or 3d tracker algorithm
Dear, I am working on OpenTLD and CMT trackers, which they are perfect 2D trackers . Do you know good 3D tracker which can return XYZ of the tracked 3d planar image? If not, any idea on how can I...
View Articlereshape matrix
I can achieve the following:  with the reshape command quite easy: Mat a = Mat(5,1, CV_32FC3); //a is 5x1, 3 channels Mat b = a.reshape(1); //b is...
View ArticleResults from cv::StereoSGBM::create. Which is the best and why?
Hi, I am trying to get something like 3D model ( Point Cloud) from two stereo photos. I have two cameras and I am trying to construct something like stereo camera. But first, I used photos from...
View ArticleTriangle detection - Canny failing on corner
Hi I'm trying to detect a triangle however approxPolyDP fails because length(approx) != 3 approx = cv2.approxPolyDP(.....) I think its because the Canny algortihm somehow cannot find lower right virtex...
View Articlematplotlib error
i installed the matplotlib, but when i go the program like this (import matplotlib) there appear such a error.(Sorry my words maybe hard to understand, because not english speaker) ImportError:...
View ArticleNative camera shield tablet error
Hello, I develop a native application on my shield tablet to get camera frame. I download the shield tutorial and I work on eclipse. I get that erro: 01-09 08:45:35.475: I/art(9536): Late-enabling...
View ArticleCan't able to run facerec_fisherface.cpp
Hi, I am new to OpenCV. I am working on gender classification, so i started with sample [code](http://docs.opencv.org/2.4/_downloads/facerec_fisherfaces.cpp). I was trying to execute of...
View ArticleFeature detection and matching for localization (openCV.3)
i work on a projects using LIDAR (and lidar only) to provide information about position based on comparison between detected feature and provided map. I already try using ORB, keypoints detection...
View Articleeigenvalue & eigenvector
Hello at all! I must get from an image eigenvalues and eigenvectors to realize person detect with colors. How can I obtain eigenvalues and eigenvectors? The results are as the trace of matrix S where...
View Articleopencv 3.1 still using FLANN version 1.6.10 from 16 May 2011 ?
Experimenting with FLANN as included in openCV 3.1 (December, 2015) I found the old version 1.6.10 (May 2011). Is there a special reason not to use the latest 1.8.4 (January 2013)? Looking at the...
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