Trainning SVM using HOG feature
I am trying to train SVM to predict the traffic sign, but I always get the same predict result for difference input image. Can anyone explain why for me? Here is my code: vector < Mat >...
View ArticleCan't build opencv headers and libraries in eclipse CDT luna + windows
Hi I've followed all the steps in [this](http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html) up to the point that I need to build the project and get the headers and...
View ArticleHow to read an image from an array character ?
i have and array containing file name (number) without the extension (.jpg) as an example - [ 1, 0, 14; 3. 0, 10; 4. 2, 15] in this first column represent the file name. how can i load first image and...
View ArticlePCA + SVM ?
Hi, I am trying to reduce the dimensionality of my feature set using PCA and then classification using SVM. I have created and populated my feature matrix and label matrix : Mat labels(875, 1,...
View ArticleCalibration with findCirclesGrid - trouble with pattern width/height
Hi, I'm calibrating a GoPro Hero 4. I have calibrated using chessboard pattern. I would like to see if I can get a better calibration with the circles instead. However I'm having some problems...
View ArticleAttributeError: 'module' object has no attribute 'BackgroundSubtractorMOG'
hello , I'm new to opencv and i'm trying to do back ground subtraction example but there is an error AttributeError: 'module' object has no attribute 'BackgroundSubtractorMOG' and it appears also with...
View ArticlegetDaimlerPeopleDetector vs. getPeopleDetector48x96 vs. custom SVM
Long-time lurker- first time poster... first off let me say what a great forum for new OpenCV developers like myself. It's been invaluable. Keep it up- you may not think people actually use your...
View ArticleHow to Blur a Rect[] with OpenCV Java
i'm trying to blur the faces detected by the webcam. This is the code to draw the rectangle. this.faceCascade.detectMultiScale(grayFrame, faces,1.1,2,0 | Objdetect.CASCADE_SCALE_IMAGE,new...
View Articlehow can i subtract backgrounds ?
Hello , i'm new to opencv and i'm trying to do background subtraction example in tutorial but it seems there is an error 'module' object has no attribute 'backgroundsubtractorgmg' any suggestion for...
View ArticleTracking forward/backward movement of camera
Hi Gurus, Is there a way to track the movement of the camera in a markerless room? Direction of movement is determined by a headtracking device. Basically I just need a value for: Camera Movement: 1)...
View ArticleMac freezes when setting full screen
Hello Xcode 7.3.1, Mac OS X 10.11.5, OpenCV 2.4.13, MacBook Pro When attempting to show an image in full screen the program stops running (lines after the one below don't seem to run), and the screen...
View ArticleUse full retina resolution on OSX
Hello Working in Xcode, Mac OS X 10.11.5, OpenCV 2.4.13 When openCV shows an image on my MacBook Pro with retina display: namedWindow( wndName, CV_WINDOW_NORMAL ); imshow( wndName, img ); it seems to...
View ArticleHow to plot the Precision-Recall Curve (PRC) for a Cascade classifier correctly?
I am following OpenCV 3 Blueprints' Chapter 5 Object Detection for Industrial Applications by Steven Puttenams https://www.packtpub.com/application-development/opencv-3-blueprints The training was...
View ArticleSource code for BackgroundSubtractorMOG2 ?
I am looking for the source code for the BackgroundSubtractorMOG2 function. I am looking for the python version. I already found the 'C' version of it at...
View Articleimshow() very slow
Xcode, Mac OS X 10.11.5, OpenCV 2.4.13, C++ I am showing images from vector, with the aim to flip through them as fast as possible: for (int i = 0; i < imgs.size(); i++) { imshow( wndName, imgs[i]);...
View ArticleHomography transformation
I've X and Y components of original and smooth trajectories saved in following matrices, whose rows corresponds to frame number and columns corresponds to features. Mr -> X components of original...
View ArticleHow can I use the gpu.class in eclipse?
I have the program code in eclipse like this: public class TestforGPU { public static void main(String[] args) { System.loadLibrary(Core.NATIVE_LIBRARY_NAME);...
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Different sort Of Disability Scooters To pick From
There are durable and lightweight scooters. The sturdy scooters are excellent to take outdoors and to circumnavigate town with. They are more resilient due to the fact that they are sturdy. Have a look...
View ArticleRTrees::setCalculateVarImportance(true) has impact on training?
Hi all My understanding of calculating the variable importance is that this is a diagnostic feature only. However, I get reproducibly different training results if it is activated. Am I wrong? Thanks...
View ArticleProblem using connectedComponents() in opencv 3 using Visual Studio 2012
Every time I try to use connectedComponents() function of opencv in my program, the execution of the program gets Aborted with error code R6010. This is what i get on the terminal **OpenCV Error:...
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