openCV installation
Hello! I am new to openCV. Where do i find the facerec_fisherfaces.exe? I can not find it in the extracted folder from opencv 2.4.13. Thank you! And do i need to install or do something to use openCV,...
View ArticleCascade Classifier Tutorial: Int. webcam not opening on Windows 10
Good afternoon: First, thank you to whoever did the Cascade Classifier tutorial. We very much appreciate your work and contribution. We are building and running your tutorial AS IS with no...
View Articlehad problem when convert the image from BGR to HSV
Hi everyone, I'm just a beginner in OpenCV. I'm trying to find the green ball's center point in the image. But when I try to convert the image from BGR to HSV the shows image result will be change to...
View ArticleCan't find any faces on pictures
I'm java programmer and I'm using `opencv-2413.jar` library. ByteArrayOutputStream streamBA = new ByteArrayOutputStream(); //wi - is instance of WritableImage (images with faces are big: 720p and...
View ArticleFeature description limitations
Dear All, I made a program (python then converted as exe for free distribution) that makes use of opencv image matching and I run into a problem. I compiled opencv3 to have also akaze, brisk and so on...
View ArticleOpenCV VideoCapture does not work as pointer or member variable
I have a very strange hevaviour with opencv3.0.0 c++ in visual studio 2010 on windows7. I simply want to open a video file to grab/extract frames from it. When i create a local variable in my cpp,...
View ArticleCircular Homography
As far as I know about the homography, It need to detect 4 corners in order to draw a rectangular shaped homography around the images. In my case am using ORB to detect the images and I have Images...
View ArticleOpenCV 3.1 Android Sample: Errors in .cpp & .h file
Hi, i wanna test opencv with android but i've got some errors when i use the android sample "face detection". In the c++ files there are several problems: Here you can see the errors:...
View ArticleGoPRO focal length in videos
Hi all, I would like to know if the focal length varies when recording videos. Because of auto-focus, I believe that for each recorded video the focal length is changing but how much this change can...
View Articlehelp me to read 10 bit YCbCr raw data from file
hello I'm not good very in english I want open a "10 bit YCbCr 4:2:2 frame" and show it in openCV frame size is: 720 * 576 my source code : void main (int argc, char ** argv) { streampos size; char...
View Article"core.ellipse" has error
How can I solve error? "core.ellipse" has error like below  but core.ellipse have api doc...
View Articlewhere can I find api reference for android opencv 3.1
where can I find api reference for android opencv 3.1 I am begginer
View Article31 linkage errors while building OpenCV_world dll on VS2013 with Qt
While building opencv_world as a DLL, Visual Studio shows me 31 linkage errors: Error 28 error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall...
View ArticleNeed update OpenCV manager APK for google play warning!
Hi All , Could you update the patch to the OpenCV manager APK for android ? The APK is too old in Google play with Libpng issue . I am Java newbie and hardly to compile it because need Linux/C++...
View ArticleAccesing MS Access Face Database using OpenCV C++
Hello everyone, I am definitely new in OpenCV. I am current working on an automated attendance management system using face recognition. I completed the face detection part, now working on how to...
View ArticlePLEASE HELP with opencv portable build
Let's say there is a target machine that is running 64 bit Linux. I have to build an opencv java project which will eventually turn into a jar file and that should run on the target machine even if it...
View ArticleUsing OpenCL's opencv API with RK3288 SoC (regarding OpenCL versions)
Good morning, I'm planning to develop a software using OpenCV 3.1.0 for an embedded [Firefly RK 3288](http://en.t-firefly.com/en/firenow/firefly_rk3288/), using OpenCL's API to fully consume the...
View ArticleFeatures2D + Homography Tutorial
Hi, I'm beginner in OpenCV domain and currently I try to implement the ["Features2D + Homography...
View ArticleAdaptive non maximal suppression for keypoints distribution Java?
Hi, I'm sorry to ask but I'm new to OpenCV for Android, and I've tried to change this [code on the last answer...
View Articlescan a particular image through camera and compare with with original
Hi, 1.Scan a image through the camera and that image matches with original image. i mean after scanning it should match with original how could i create could anybody help me on that.
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