opencv_world300d.dll Invalid or corrupt file(LNK1107)
I'm using visual studio 2015.When i build the project it always say "opencv_world300d.dll Invalid or corrupt file" error LNK 1107.But i correctly configure the linker and input the filename under...
View ArticleMat::convertTo
I have read the documentation for convertto but i can't seem to understand the scale argument. What is its purpose? After testing it, the size of the mat object is still the same. So what does it do?
View ArticleProblem with getOptimalNewCameraMatrix
I want to calibrate a car video recorder and use it for 3D reconstruction with Structure from Motion (SfM). The original size of the pictures I have took with this camera is 1920x1080. Basically, I...
View ArticleIncreasing performance of vision algorithm
I have a code which has to analyse around (640 * 480 * 2000 * 1000 * 200) variables(image data,colour and depth) from an image in one process, cas of which performance is lacking,since i'm new in...
View Articlecmake error sys/video.h: No such file (OpenCV 3.1)
While doing cmake getting below error (OpenCV 3.1 source): OpenCV/build/make_dir/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:25: fatal error: sys/videoio.h: No such file or directory. compilation...
View ArticleHow to detect vehicle in opencv 3.1? Im using C++
I used this code but it detects many objects in the video: using namespace cv; using namespace std; int main() { //global variables Mat frame; //current frame Mat back; Mat fore, fMOG2, fKNN; Mat...
View ArticleHow to find features like vehicle length and width in video?
I have detected the vehicle using background subtraction in video and now to classify them into different types (sedan, SUV, Bus) I want to extract features like vehicle length etc. I have googled a...
View ArticleIs there a Mat constructor that has const IplImage* as parameter?
Hi, I have started to check the OpenCV version 3 and I started to see all the tutorials and docs (for fun and enrichment of my knowledge). First thing that I found is that > Create a header for an...
View Articleopencv_ffmpeg2413_64.dll gets loaded, VideoCapture still cannot open files
I'm compiling using VS 2015, and I can see in the debug log that the ffmpeg dll gets properly loaded, but when I try to open a file using `VideoCapture` (`VideoCapture::isOpened()` returns false). I do...
View Articlehow to implement neural network using opencv and java
I have to do a project that recognize images using opencv machine learning. I should try many methods. I tried KNN and SVM but i don't know how to implement ANN. Can someone help me? This is the KNN...
View ArticleHelp: Face Recognition using LBP confused with unknown Faces
Hello everyone, I try to use this face recognition code below which I found on one of the Opencv documentation, but I have a problem when a new person face who is not in the recognition database is...
View ArticleStereosystem triangulate points
Hi guys, currently I am working on a program that takes 3d coordinates from non rectified stereo images with triangulate. First I give you a short insight into my program. I tried it on this way...
View ArticleOpenCV + OpenGL: How to use SolvePnP Rotation and translation vector in OpenGL
I'm working on an AR program. please heip me dealing's almost done. I found marker and rvec,tvec by SolvePnP. I can not draw object in OpenGL. I am beginer OpenGL,OpenCV. I want to render 3D cube over...
View Articlerendering in opencv
I get point cloud's from stereo matching. but I can not to convert to surface (3d).how can I do this???
View ArticleHow to get color name from hex code in android studio?
I use openCV for color identification and I get the color in hexadecimal form like '#FF0000' Now I want to convert it to a string.
View ArticleBaseRowFilter and BaseColumnFilter in opencv 3.x
I have some old code which I would like to use/port: template struct RowSum : public BaseRowFilter { RowSum( int _ksize, int _anchor ) { ksize = _ksize; anchor = _anchor; } void operator()(const uchar*...
View ArticleUse libjpeg-turbo with OpenCV 3.1 on Android
Hi, I'm trying to replace libjpeg by libjpeg-turbo to speed up reading and writing images on Android. I've successfully used the turbo API directly to verify image IO operations were faster but I'd...
View ArticleHow can I work with Depth Data, offline?
I have some depth data & RGB video have been captured by kinect camera & I've saved them in a folder. How can I extract depth from them.
View ArticleObject Recognition/Classification Problem
I'm working on a visual inventory system that takes snapshots of giant steel balls in conveyor trays and attempts to count them. My goal is 99.5% count accuracy. This is how a typical snapshot looks...
View ArticleReally need cv2.adaptiveBilateralFilter
Hi, obviously someone thought, that cv2.adaptiveBilateralFilter is no longer needed. Well, I need it definitely, because changing to bilateralFilter gives totally different results for my image...
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