Color blob detection crashes
Hey guys The color blob detection sample app crashes on my device with the SIGNET error and nothing else on the log file. All the other OpenCV samples work perfectly so I dont know what the error...
View ArticleCrop rectangle and apply transformation from image?
Hello all, i want to detect paper sheet from image.i applied medianBlur, Canny ,dilate,threshold,Etc. algorithms to find.i am able to find sheet but dont know how to crop rectangle and apply...
View ArticleOpencv crashes when initAsync is called
I am using a simple code to open up a camera on opencv the app works fine on LG G Pro but crashes on samsung galaxy S4 I am using OPENCV 2.4.1 and android studio Please Note that this activity is...
View ArticleHow to run OpenCV C++ code on Android studio or Eclipse?
I have a code in OpenCV c++. I have run the code on Visual studio and it is working fine but i don't know how to create .apk file. Now i want to run the code on Android Studio or Eclipse. I know that...
View ArticleLooking for a way to turn a circle (unfilled) into a line.
So I have a bunch of data on an image that is condensed into an outer ring around a picture. It looks something like this.  What I want to do is...
View ArticleHave 120fps in JavaCameraView ?
My device supports 30,60 and 120fps. How do I implement that in JavaCameraView. In many places it's suggested to use Camera2 but how would I go about that and will it work ? Cheers :)
View ArticleHow to build opencv 3.1.0 for android with GCC 4.9 and c++_shared ?
I want to compile opencv 3.1.0 for android using gcc++ 4.9 and c++_shared. I use the most recent https://github.com/opencv/opencv/blob/master/platforms/android/android.toolchain.cmake My batch build...
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A manifested episodes of nausea, there are several once a week, transient episodes of vomiting (at least time per week) or stereotypical episodes of vomiting (up to week) that occur at least times per...
View ArticleUsing android camera and processing frames for tracking
Hi, I need to do tracking using opencv in android, I can't find a way to process the frames and then show them on preview. Is the way to do it is not to show the camera preview and just paste the...
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Choosing Solutions Of android games apps
Maximum applications androids best three Games I must emphasize that although I am focusing mainly on music/songs here, I would also urge you to look at a downloading site that provides not only music...
View ArticleOpenCV Error: Assertion failed (prevPyr[level * lvlStep1].size() ==...
I am working on 2 images, on the first one i found goodFeaturesToTrack and draw it then on it, i am trying to to tracking with that to the second image but the line of calling calcOpticalFlowPyrLK...
View ArticleUse OpenGL Texture as Input
Hi, I am writing an Android app (in native C) where I load a MJPEG stream onto a OpenGL Texture (this is already working). I would like to use OpenCV to detect markers on the frames. Is there a way to...
View Articleopencv image proccessing not recognized text(OCR)
my code is to detect an document using android mobile camera (realtime).this is under oncameraframe().also i am using custom camera which is extend the Javacameraview.images taking from this is low in...
View ArticleAfter converting image to bitmap, image doesn't displayed
When I'm trying to convert the Mat image to Bitmap the image doesn't displayed in my device, on the contrary when I use Bitmap.Config.RGB_565 the displayed image is black. Here is my code: Mat src =...
View ArticleImage recognition on Android
I am trying to develop an Android app on Android Studio that allows the user to point the device camera to a target object and the app will find a similar image from a folder of images on the device....
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 ArticleBuild opencv 3.1.0 extra module for android on Mac?
Hi, I'm new to OpenCV and want to use SIFT and SURF features detector on Android Studio that is available on opencv_contrib. I'm using these tutorial (with modification) to build opencv 3.1.0 extra...
View ArticleUnable to convert color image to grayscale in android opencv
This is the part of code which is not working good. I know this question has been asked earlier, but i have done everything i could do but still couldn't figure out the reason. This is the portion of...
View Articlehow to find object in opencv and repalce that with new pic in android?
how can I find the red object in the image below with Open CV in android and fill it by my pattern like second pic ? I need to create app to fill wall with pattern automatic when user click on a image...
View ArticleFind a rectangle and crop the area
Hello, how I can find a rectangle in CameraBridgeViewBase (Android), draw an outline on it and save this area? I research a lot but did not find anything very relevant. Thanks.
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