Imgproc.FindContours doesnt fill List of Contours Opencv Android
i'm using OpenCV 2.4.11 for Android(Xamarin).I'm trying to do detect rect object(Paper sheet) and to make wrapPerspective,smiliar this [tutorial][1] but for Android, like this steps : Canny edge ->...
View ArticleBinary Image Matching
Hi, I want to make a project on Hand Static Gesture Recognition in which user perform some gesture basically still gesture like making a V shape or anything else and the program will recognize it and...
View ArticleHough, RANSAC, Kalman, issue with (Unhandled Expression )
Hello everyone, I am try to develop a lane detection and tracking program using opencv. I am having this annoying ERROR which is saying that there is undhandeled expression at a memory location The...
View ArticleHow to fix ( release ) memory problem ? kernelbase.dll error
#include #include #include #include #include #include #include using namespace cv; using namespace std; int c; int main(int argc, char* argv[]) { ofstream fout("output.txt"); Mat image =...
View ArticleHow to set camera format in OpenCV
Hello, I have a Logitech HD Pro Webcam C920, and it supports three formats: YUV4:2:2, H.264, and MJPEG. So I want to set its format to H.264 with OpenCV. How can I do that? I can set height, width or...
View ArticleSave an Face Detection
Hi all!!! Sorry...I can't English.(Using Google Translation) I want to save in the detection window as an image from the movie by using the Face Detection of OpenCV sample program. 1)Run the...
View ArticleIn drawKeypoints function, on what basis keypoints are drawn ?
I'm searching for a image in the video which the image already exists but trans-coded to another codec and resolution is also changed. I thought opencv can help to get the solution. I have come...
View Articlecanny apertureSize parameter doesn't work
The apertureSize parameter as described by the [canny documentation](http://docs.opencv.org/modules/imgproc/doc/feature_detection.html#canny) does not give any difference in the detected edges. Here is...
View ArticleDetecting touching objects
Hello, I am trying to detect touching objects. I am following the tutorial at [opencv.org](http://docs.opencv.org/master/d2/dbd/tutorial_distance_transform.html#gsc.tab=0) but I couldn't manage to...
View ArticleRunning 2 algorithms simulatenously
Dear, I want to capture a video and do 2 algorithms in the same to it, where each algorithms take approximately 2 seconds. How to do that? Note: Ive tried to do the 2 algorithms in 2 different...
View ArticleSet power line frequency for camera
I use python and opencv to build a stereo tracker using two cameras. The question is how to set up power line frequency in openCV version 3.0.0 (or any orher). I know that the camera I use...
View ArticleAKAZE errors deallocate
Hello, I try to use AKAZE (below there is my code snippet) but I am getting an error. The error is related to some freeing memory with akaze (kaze, orb I got the same error). Mat img_bis =...
View Articletrouble with opencv 3 and visual studio 2010
Hi i have installed opencv 3 on D:\ drive. based on this guide and its next page i have a couple of problems: [link...
View ArticleCompiling the opencv for GPU
Dear experts, I have few questions about compiling for GPU to get better performance: 1- When I compile for GPU, does it work then on all GPUs or only Cuda Geforce? 2- If the application run on a PC...
View ArticleOpenCV 3.0 Python Documentation
I just switched over from OpenCV 2.4 to 3.0. Previously there was clear documentation of both C++ and python. Am I missing it or is there no documentation for python?
View ArticleBuild OpenCV source code with CUDA support
I am building opencv source code according to the link. https://hemprasad.wordpress.com/2014/06/20/opencv-installation-in-windows/ I created Visual Studio projects with CMake. I have the errors as...
View ArticleI couldn´t open videos with Python + OpenCV
I try to open videos but I couldn't. I use this code and I try to open viedos MP4 and AVI. I don't know why but if I print the value of cap.isOpened() the returned value is FALSE. import numpy as np...
View ArticleOpenCV video freezes
I just installed opencv 3-dev. I then ran a simple code of a normal video capture which outputs the video taken from the webcam. But as soon as the program window opens the video freezes. It sometimes...
View Articlefirst run with Error after tuts setup for Visual Studio
Hi, i'm using win 8 and VS 2012 and trying to do the below tuts page but cant run the test, error: The program cant start because opencv_core248d.dll is missing from your computer .try re installing...
View Articlehomography in stitching class
Is OpenCV's stitching class using the function "findHomogragy" or any other function? I can't find it in the stitching class.
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