Detecting the base of the triangle
I have this project where i need to detect and find the center of the base of an isosceles triangle, sample output is like this [C:\fakepath\Base.png](/upfiles/15111444888535392.png) I want to detect...
View ArticlePornography/nudity Cascade training best size and parameters
Hi everyone, first of all sorry fir my bad English. i'm trying to train a classifier to detect porno/nude images. i've collected 50,000 different porno images as positives and 100,000 images as...
View ArticleAge and Gender Detection using opencv in c++
Hi, I am developing one software for analytics.I have implemented face detection in that. So now i want to find age and gender of detected person. I did google but unable to find anything. Can anybody...
View ArticleHow to build OpenCV for Android using Visual Studio?
Hello, **Short story:** Can anyone describe the process of how to use OpenCV in a C++ Project for Android in Visual Studio? ---------- **Long story**: I'm currently trying to build an OpenCV native...
View Articlesee the dictionary content from Bag of Words
Hi, Is it possible to see the dictionary content as visual words from a bow? I found interest points and descriptors of a group of images and clustered them. Now I have a dictionary of visual words...
View ArticlefindContours() does not find accurately contours (Python)
I am using OpenCV+Python to detect and extract eyeglasses from a (face) image. I followed the line of reasoning of this post(https://stackoverflow.com/questions/26418558/glasses-detection) which is the...
View ArticleHow to remove background of a selected contour
@Override public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) { Mat srcMat = inputFrame.rgba(); Mat processedMat = new Mat(); Imgproc.cvtColor(srcMat, processedMat,...
View Articlehow to reduce scanning time of QR code using multi-core in opencv c++
i have to reduce scanning time of QR code within 7 sec .what kind of multi-core processing method use to solve this problem.when i try to scan QR code its to take more than 20 sec.
View ArticleBOWKMeansTrainer constructor
Hi, I have a question regarding BOWKMeansTrainer constructor. Would anyone please tell me what are the parameters of the constructor? I had a look at opencv document, but I could not find any useful...
View ArticleRegarding rectangle button in opencv c++
I am making label tool in opencv with c++. I have made two buttons. If I click on button, the button is selected. The red colored rectangle is displayed around the button. when I click the another...
View ArticleHow we import OpenCV in java while using no compiler just Notepad?
Its first time I am using OpenCV, I am in learning period, I just want to know how to import OpenCV in java while we are not using any of the Compiler just simple Editor, like I m using Atom. Please...
View ArticleGStreamer unable to open RTSP stream on CentOS OpenCV
I am trying to open RTSP video stream using GStreamer on Linux CentOS, it throws the exception below:> OpenCV Error: Unspecified error> (GStreamer: your gstreamer> installation is missing a...
View ArticleOpenCV Error: Bad argument (The array of _responses must contain as many...
My training data is a 10000 by 1024 Mat matrix type: CV_32FC1. My training classes is a 10000 by 1 Mat matrix type: CV_32S. each row of training data is a gray image and each row of training classes is...
View ArticleRepeatedly setting FPS makes webcam images darker
I am using opencv3 and the logitech c920 webcam. I want to change the fps of the webcam every 10 seconds but every time I change the FPS the images I am recording get darker. This is a constant...
View ArticleDocument Detection working with C++ code, But trouble in java conversion.
I developed an Document scanner. I am using opencv for image processing. It works perfectly with C++ code, but i want that in java so i converted it. But not detecting document properly when i am...
View Articlehow to display Opecv mat in an Android Imageview?
I'm trying to display processed mat into imageview in another activity. First i'm converting mat to bitmap and then passing bitmap value in imageview. But it is not showing anything in image view. Help...
View Articlepython opencv 3.3.0 + python 2.7 . how read/change tracker parameters
TrackerKCF_create()- function creates object, but ow read and change tracker parametes. There is Params struct, in which are these parametees In c++. (for example: interpolation factor, sigma....)......
View Articleopencv 3.0 face detect runtime error in visual studio 2012
This is part of my code on facial detection in opencv 3.0.I am using visual studio 2012.when ever I run my program the program crashes with error of accesses memory violation at some location.Image...
View ArticleAndroid - OpenCV memory usage
Hello, I develop the application based on recognition object using OpenCV 3.3.1. I use Android Studio 3.0. I am quite confused by how much the opencv native takes memory (about 500MB) but the garbage...
View Articlehow to detect object and pattern and retrieve the angle of orientation
I am new to OpenCV I want to know how i can detect an object regardless of its orientation for example. the following is a reference picture Reference Picture: ![image...
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