Machine learning approach for extraction of arm.
Dear All, Currently, I am working on arm detection with the help of machine learning approach in opencv with c++. I am using rgb as well as depth data for it. As I am new in machine learning filed. If...
View ArticleTime to contact
Hey, I'm struggling wrapping my brain around how to estimating time to contact using motion vectors ( or maybe expansion cues?) from optical flow. I have tried reading some papers on the topics, but so...
View ArticleUnhandled exception in Release version of Feature Detection and Feature...
Hello folks, I have OpenCV 3.2.0 installed on VS2017 CE. I built and compiled the tutorials on Feature Detection and Feature Matching with FLANN using code from...
View ArticlecvWaitKey is not generating key codes for naviagation keys
I have involved with opencv key function ie cvWaitKey(0).whenever i press the "r" key the point on opencv image window is moving right direction, for "L" towards left ,for "u" upward direction as...
View ArticleDewrapping results not expected result
I'm trying to iterate through end points of lines, build segments between them and finally dewarp the distortion. I should imagine, that all those "mini"-segments are small images (somthing about...
View Articlebad results with findCirclesGrid
Hello everybody, I'm trying to write a program for a camera-calibration using the 4x11 asymmetric circle grid. I use a camera with 3840x2750 pixels. Although the pattern is recognized by the program...
View ArticleI want to perform object recognition using images and videos but i dont know...
I am recently working on object detection using traincascade in opencv which i have learned a lot and prepared an .xml file to detect tomato but I have to perform object recognition . Please suggest...
View Articlecv::resize() fails with access violation error (caused by )
I'm trying to do a simple resize using opencv which ends up crashing! This is the example code which the access violation occurs: void Classifier::Preprocess(const cv::Mat& img, std::vector*...
View ArticleDetection of hand from the depth data.
Hi All, I am working on human skeleton extraction from depth data. I did some research on machine learning approach but it is difficult to apply machine learning to find out whole body skeleton. So, I...
View ArticleWhat's the best method for tracking identical objects?
Hi all, I'm sorry that my question is so wide, but I will try to explain in detail what is my problem. So, I just wrote a program, that checks whether two balls of different colors are on the collision...
View ArticleWhy am I Getting distorted images after sending them from C# to OpenCV in C++?
I created a C DLL out of my C++ class which uses OpenCV for image manipulations and want to use this dll in my C# application. Currently, this is how I have implemented it : #ifdef CDLL2_EXPORTS...
View ArticleHow to read .mat file in opencv c++
Hi all, I have file in .mat format. I want to read this file in opencv with c++. If anyone idea, let me know. Thanks
View Articlelinker => input=>additional dependency?">“Opencv_world330d.dll is missing” message is displaying even after adding...
I am using Opencv for my project and for the first time. While using Opencv I faced problem as “Opencv_world330d.dll is missing” message is displayed as soon as I run the program. I also added...
View ArticleOpenCV V3.3 64bit Video Capture Memory Leak
Dear community, with this simple peace of code a get a memory leak using opencv v3.3 64bit with Visual Studio 2015. int i = 0; while (i++ < 50) { VideoCapture test; test = VideoCapture(0); } Can...
View ArticleIOS opencv memory rad failed for 0x0
when program go to a certain line, it goes to `error: memory read failed for 0x0` stop at queue: ` com.apple.avfoundation.videodataoutput.bufferqueue(serial) thread 4 0 0x00000000`...
View ArticleOPENCV doesn't show images for feature detection
I am using this tutorial: http://docs.opencv.org/3.0-beta/doc/tutorials/features2d/feature_detection/feature_detection.html It built successfully but I don't see any images. Can anyone help ... Thanks
View ArticleHow to play a video in opencv using C++?
Please tell me how a video file is played in Opencv. I tried using cvCapture. here is the following code I used. it is displaying 'video not opened'. int main(int argc, char* argv[]) { CvCapture*...
View ArticleConversion of channel 3 to channel 1
Hi All, I have depth data stream. I am getting the data type of of video stream is 16 which is CV_8UC3. How to convert this channel 3 to channel 1? and also, This video stream contains only the...
View ArticleUnable to play a video in opencv3
Here is my new code. int main(void) { cv::VideoCapture capVideo; cv::Mat imgFrame; capVideo.open("C:\\Users\\sbv\\Documents\\MyVideo.avi"); if (!capVideo.isOpened()) { std::cout << "\nerror...
View ArticleChanging Exposure with Windows Forms
Hello, Every time I run this bit of code meant to change the value of the exposure with a trackbar and I am getting an error saying System Access Violation, attempted to read or write to protected...
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