image step not continuous after dividing an image
Hi everyone, I am try to divide an image into blocks in opencv and i get the "Error image step is not continuous". Pls here is my code need your help. vector ilmage; int N = (images[0].cols *...
View ArticleBest method to detect multiple objects
I am working on an application that is required to detect statues, paintings etc. Which method is the best to detect these objects? I tried...
View ArticleSample and resample value for a loop
I need to sample a 1x1 Mat that is converted to an int. When I make a loop like this while (grayVal <= 100){ Log.i("Mat Value", String.valueOf(grayVal)); } grayVal never changes, I know that I need...
View Articlesubtract color from Mat
Hello everybody I'm new in OpenCV and I have a Question: I have an Image like that:  [original...
View ArticleOpencv - Camera position relative to Aruco Markers
I've been playing around with Aruco markers for a while and I want to start using them for a purpose. I created a board 2:2 of markers, calibrated my camera and printed out Rvec & Tvec (Rotation...
View ArticleMulti-threaded feature detection on Android
Hello, I'm successfully detecting and using features with the help of ORB and BRISK feature detectors on Windows and Android. I was wondering if the implementation of the above feature detectors is...
View Articlehow do I launch Opencv
I have a computer with Ubuntu 14.4. I have downloaded Opencv and extracted the files. I now have a folder with all the files and subfolders with Opencv version 3.0. What I cannot find is a .exe file...
View Article[android with opencv ] RGBA to signal channel
I want to extract green channel from input.rgba(), my code are below: enter code here mRgba = inputFrame.rgba(); Rect r = new Rect(150,50,200,200); Core.rectangle(mRgba, r.tl(), r.br(), yellow, 3);...
View ArticleA question about java opencv jni
We know that we are provided a java interface like Java249.jar and a dynamic link file like dll files in Windows .I think that it doesn't matter whether i have configured the c++ Opencv in my OS....
View ArticleSetting up OpenCV 3.0 Gold to work with Python 3.x on Windows
Hi, I am trying to setup the latest release of OpenCV to work with my Python 3 environment. I found this tutorial...
View Articlecomputing average image of N webcam images crashes sometimes
Hey guys, I wanted to write a program which takes N live webcam images, calculates an averaged-image out of it and saves the average image as a jpg. I'm passing the filename and the number N of images...
View ArticleCannot get opencv 3.0 to work
Hi, I have a fatal unresolved external error when I'm trying to compile programs in opencv 3.0.0. Now I know that this question was asked many times but my problem is specific. - I installed opencv...
View ArticleCalculate the undistorted points of the calibration pattern of a fisheye lense
I have successfully calibrated and undistorted the image, which is distorted by a fisheye lense. For the measurement of the undistortion i want calculate the error of the distortion. For this...
View ArticleNO QUESTION - Answers vs Comments in Q&A forum
I would like to understand use of "answer" and "comments". The FAQ states *small remarks can be left using comments* but I can see many answer as 1st comment from users with high karma like...
View ArticlePython 3 & Anaconda
Dears, I am starting with OpenCV and building latest OpenCV using MSVC++ 2015, Anacodna 3 (as python distribution). Using CMake for configuring and I am getting ... Found PythonInterp:...
View Articleopencv_traincascade error: Train dataset for temp stage can not be filled....
Bat file contain: C:\opencv\build\x86\vc11\bin\opencv_traincascade.exe -data classifier -vec samples1.vec -bg negative.txt -numPos 10 -numNeg 100 -numStages 3 -precalcValBufSize 256 -precalcIdxBufSize...
View ArticleNot able to build OpenCV3-RC1 with 'Debug' build type
Hi, I have problems to build OpenCV3-RC1 with the Debug build type activated. I was able to build a normal shared library version, but with debug mode I get the following: error:...
View ArticleUsing TLD on OpenCV
I am trying to implement a TLD real time tracker on Open CV. However I couldn't find any concise tutorials as to how to correctly implement a tracker. Please guide me as to how to do so. Is there...
View ArticleConverting OpenCV grayscale Mat to Caffe blob
I've been [following an example](https://github.com/jyegerlehner/caffe/blob/nat_img_autoenc_parallel/tools/prop-patches.cpp) I was referred to on how to convert an OpenCV Mat into a Caffe object I...
View ArticleOpenCV 3 libraries built
Dears, I am trying to build OpenCV 3 latest libraries and I wonder I am not understand process correctly or missing something. As documentation on build says A full list, for the latest version would...
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