Draw irregular shape plane on Image in opencv
I want to draw irregular shape plane passing through 4-10 points. This points are making closed loop area so that I can calculate area covered by this points. e.x. I have 6 points, I joined then by...
View ArticleDewarp images taken using digital camera
I want to dewarp slightly cylindrical documents photographed with digital camera (like as in android devices). Is there any opencv algorithm to do the job. I have gone through some research papers...
View ArticleOpenCV3 Assertion failed on accumulateWeighted
I try to make average background but something wrong because it way to crash app ` include "opencv2/opencv.hpp" using namespace std; using namespace cv; int main(int argc, char *argv[]) { VideoCapture...
View ArticleDraw polygon on 3d using opencv/C++/CGAL
Hi, I want to draw polygon in 3D surface. Here I have two separated circle and I want to join their outer surface so that it be polygon. anyone please help me. thanks in advance. I am little bit...
View Articlehow we do camera calibration using chessboards in opencv 2.4.10 ?
I am using opencv 2.4.10 . To calibrate with camera some of my guides told me to follow camera calibration with opencv . but how we do camera calibration with opencv 2.4.10 and how we include settings...
View ArticleI want to know how to apply phase correlation with difference size image.
 I want to apply phase correlation in this picture which size is totally different. Actually, my final goal is like this This is picture what i want to...
View ArticleC/C++ client server bind
Hi, I've successfully added openCV to my project and i wanted to implement client-server system. The socket function doesn't throw an error but the bind method does if(bind(sockfd, (struct sockaddr *)...
View ArticleWhy does it takes so long to capture the frames and store them in memory?
So, I'm writting a program that loads a video in memory to determine if it's unstabilized. I realized the program was taking way too long to execute, so I put a timer on my code: const clock_t begin =...
View ArticleHow to extract relevant features to detect object?
Hi I would like to detect the object (airplane door) from short distance. The algorithm should be very robust so can be implemented by any plane (with lots of different paintings, logos ) and by any...
View ArticlemulSpectrums
what is the result of mulSpectrums? if input A = a+bi input B = c+di mulSpectrums(A, B, result, CV_DXT_MUL_CONJ, true) then, result = (a+bi)*(c-di)?? or just result = bi*(-ci)?? Also what type of...
View ArticleVec2f , mulSpectrums
i got the answer about mulSpectrum like this. Mat z1(1,2,CV_32FC2),z2(1,2,CV_32FC2),z3; z1.at(0, 0) = Vec2f(1,1);//1+i z1.at(0, 1) = Vec2f(2,3);//2+3i z2.at(0, 0) = Vec2f(2,1);//2+i z2.at(0, 1) =...
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