OpenCV Tutorial 2 - Mixed Processing Modification
I am trying to modify OpenCV Tutorial 2 - Mixed Processing Modification sample application for Android. The "Find Features" function is very useful, but I need the app to display some value that...
View ArticleCannot run a script that executes my opencv program at startup under Linux
Hi there, I would need some help there. I'm trying (since this morning) to make a script that can launch my opencv program at startup. The script does work well : #!/bin/sh export...
View ArticleError at Position, can not access at face detection sample
I am trying to run a simple face detection code to get started in OpenCV. I use Visual Studio 2015 Enterprise and have the latest version of OpenCV (I think, it's 3.10) on a Windows 64bit Platform. I...
View ArticleDetecting Documents On White Surface
I am trying to reproduce a real time document scanner like the one Scannable evernote has created. With some of the methods I have found and tweaked, I was able to create a reliable outline of a...
View ArticleMultiplication between Mat and Scalar
For a given mask image (binary `cv::Mat M`), I'd like to color (`cv::Scalar C`) the white pixels of `M`. In general, I think this problem is an element-wise multiplication between `cv::Mat` and...
View ArticleFind direction from cameraMatrix and distCoeff
Hi Guys, I have calibrated my camera by detecting checkerboard patterns and running calibrateCamera, retrieving the cameraMatrix and distortion coefficients. These I can plug into project points...
View ArticleHow to use OpenCL in OpenCV3.0
I read that the OpenCL modukes are abolished in OpenCv3.0. I would like to use the former ocl::meanShiftProc in OpenCV3.0. My computer is only with an Intel core i7-3770 processor, but without any...
View ArticleUniform LBP - problem with histogram [C++]
I'm having trouble trying to transform my normal LBP into the uniform version, I already read some guides and even the answers here but I'm feeling kinda dumb since I'm not being able to translate...
View ArticleDeinterlacer opencv function for scilab
The following code is not working for images in scilab, it is working for matrix, can you please find the bug? /******************************************************** Author: Deepshikha return_image...
View Articleextract only data with open cv?
hey friends I tried to convert greyscale image to binary image , but now I want see only data without header ? how I can extract header only and data only ? after I want save header in file and data...
View ArticleHead detection and tracking (orientation independent)
Hello Is there any way to detect people heads in video/picture? Idea is to have solution like this: https://www.youtube.com/watch?v=InqV34BcheM Not sure that HOG detector is able to do this, may be...
View ArticleHow to force "org.opencv.android.JavaCameraView" preview to be full screen
Hi, I am trying to set org.opencv.android.JavaCameraView to be full screen, but its not working, This is main xml: This is the manifest: The main activity: public class MainActivity extends Activity...
View ArticleWhat is the difference between Stump-based and Tree-based frontal face detector?
In the Opencv there are some haar cascades: - haarcascade_frontalface_alt.xml - Stump-based 20x20 gentle adaboost frontal face detector. Created by Rainer Lienhart. - haarcascade_frontalface_alt2.xml -...
View ArticleWhich one does Opencv supports libav(FFmpeg fork) or FFmpeg
For ubuntu 14.04, which one does OpenCV ( 2.4.9 / 3.0) supports, libav or FFmpeg. Also how to compile OpenCV with FFmpeg/libav enabled. Right now I have installed Opencv 2.4.9 which gives error while...
View ArticleRemove exif data from image
Hi, I am using Java OpenCV. I want to remove the exif data from the image, while maintaining the same quality of the image. Is it possible to do this using OpenCV? -- Rohit
View ArticleTechnical reason behind ORB
Hello, I am currently working on an ORB detector/descriptor for recognizing the Images which are captured from the camera and am a bit novice to this stuff. Here goes my topic: Eventhough I capture...
View ArticleAnnotate a dataset of images
I'll be recording a new dataset using a couple of sensors: kinect, stereovision cameras.. for a project for people detection using only depth information. But I don't know yet how can I annotate the...
View ArticleContrib extra module compilation
I have downloaded OpenCV & opencv_contrib and successfully generated project files using Visual Studio 2010. Then I opened ALL_BUILD project. I compiled the OpenCV and the message in output window...
View ArticleDifferent results of CascadeClasifier on CPU and GPU
I built the latest OpenCV version with cuda support from master branch. After that I tried to use CPU cv::CascadeClassifier and GPU cv::cuda::CascadeClassifier, but faced with a strange result. I use...
View ArticleCamera calibration: Pattern.png dpi?
At what DPI should http://docs.opencv.org/3.1.0/pattern.png be printed? **Alternatively:** Does the size of the printout not matter? I've read the relevant OpenCV pages with the tutorials but,...
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