speed up remap with different maps per color channel
Hi, I am trying to display a camera stream on my android device with a distortion so I can look at it through a Zeiss VR One. For the distortion, I took the lookup tables from the Zeiss VR SDK, as...
View ArticleImprove Runtime of a Function
Hi, I am using a function to find difference between 2 images. It takes two 8-bit grayscale images, converts them to CV_32FC1, does a subtraction. Here is the function I am using: cv::Mat...
View ArticleLogistic Regression, probability of the predict, OpenCV 3.1
I have implemented the method of Logistic Regression for image recognition with OpenCV 3.1. How can I get probability of the predict?
View Articlefacerecognizer all images must be of equal size
so i'm running code on : http://docs.opencv.org/2.4/modules/contrib/doc/facerec/tutorial/facerec_video_recognition.html But i keep getting these errors. What am i doing wrong? Clearly there is...
View Articleassertion failure!
Hello,I got error at run time "debug assertion failure" Expression "vector subscription out of range" I debug my code step by step ,I figure out that code crashes at line `Mat final=Images[best];`........
View ArticleDeciding if a ball is inside a goal via Image Processing
i have an app which can track the ball perfectly at all time I want to know if a ball is inside a goal , The problem I am facing is how to decide it when you have only a 2d vision of the goal and...
View ArticleSame output for all the OpenCV4Android Samples
Dear All, I have installed OpenCV4Android sample files and starting executing it. It's been a tough case for me as I see a bit of same output for all the samples which I run on my Emulator. I know...
View Article(Best) way to track a circle with a cross inside
Hi, I am currently trying to find a solution on how to track a specific target which looks like this:  It is just a circle with a cross inside. I am using...
View ArticleError during stereocalibration
I streoCalibrate Minoru 3d camera with OpenCV 3.1 and libcamm and I get the following error:> OpenCV Error: One of arguments' values> is out of range (The specified aspect> ratio (=...
View ArticleProblem black image
Hi, i use "smartgaze" trishume's project for eyetribe on github. The programmer of this project take raw files from hardware. I use this code in virtual machine kubuntu on virtualbox. I view a black...
View Articlecmake 2.8.7 fails on master
I faced on build error on Ubuntu 12.04. on cmake stage. The error says CMake Error at CMakeLists.txt:608 (find_package): find_package called with invalid argument "CONFIG" I'm on master and my cmake...
View ArticleExact human shape extraction.
I am trying to recognize human in images. I have tried using the **haarcascade_fullbody.xml** and **hogcascade_pedestrians**. Both give kind of okay results. I am trying to get the human body...
View ArticleEpilines still not correct..
Hello everyone, I was following OpenCV tutorial for Epipolar geometry in python and wanted to see in my little test code converting to c++ (Qt environment). Testing with the standart dataset of OpenCV...
View Articleopencv2/aruco with ROS opencv
Hello, I want to use opencv2/aruco.hpp with ROS that is installed with opencv3. This is for usage with function cv::aruco::estimatePoseSingleMarkers . Is it also available on ROS opencv, or do I need...
View ArticleAndroid Emulator Camera Displaying Blocks
I was working on the sample tutorials of OpenCV4Android. When I open the camera in my Emulator it's opening something wierd with White and black boxes. Because of this camera, I was unable to run the...
View Articleissue with setting /MT flag while building
I am having problems while building OpenCV with /MT flags using Intel Compiler for Windows. OpenCV version: 3.1 Host OS: Windows 7 Compiler: Intel Compiler In which part of the OpenCV library you got...
View ArticleHow to read pixel every frame?
**Hello!** I using *Opencv 2.3.1* and *cimg*! I need to read every frame with IP camera and record it into the BMP file. I have the following code: Mat frame; VideoCapture...
View Articleopencv error when trying to submat an image in an android project
I tried to detect contours in an image ,draw a bounding box for each contours ,put all rect.x rect.y rect.height in an array lists ,sorting them and finally draw a rectangle for each lignes in the...
View Article"_rvec" and "_tvec" for solvePnPRansac() are wrong.
Environment: OpenCV 3.1.0 OS X 10.11.4 I am using "solvePnPRansac()" to get "_rvec" and "_tvec". However, I thought values are wrong. Because when I tried same step with "OpenCV 2.4.12", there is the...
View ArticleCoordinate's gradient value
Hi I used sobel derivative for get derivative in my images I found min max value But I want to this For example my coordinates (162,0) and ı find this coordinates gradient value it could be -100,-250...
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