Trouble setting up OpenCV with NDK in Android Studio
Hi, I would like to use OpenCV with the NDK in my Android Project. I am using Android Studio. I can't get it to compile properly. I am getting error while including opencv2 in my cpp file..... ** I...
View Articleshow the intermediate MAT in Android
Hi, On android we need to do this : Mat rgba = inputFrame.rgba(); // get the full picture Mat rgbaInnerWindow = rgba.submat(0, height, 0, width); // Procces it Imgproc.cvtColor(rgbaInnerWindow,...
View ArticleHow to tranform image in negative like the camera effect-negative
Hi, I want to transform the rgba image and apply a nagative-effect. Can i do this with OpenCV ? If yes. How ? Thanks
View ArticleHardware requirements to run Opencv in a Android platform
Hello, I'm developing some apps using Haar Cascade for Android and I want to know which is the cheaper smartphone that can execute them. Does anybody know what are the minimum hardware requirements to...
View ArticleAndroid Camera2Renderer can't find the correct resolution
Hi, I'm trying to run this opencv4android example (android tutorial 4): https://github.com/opencv/opencv/tree/master/samples/android/tutorial-4-opencl The project compiles fine, but when i tryied to...
View ArticleConvert org.opencv.core.Point[] pointsTmp to MatOfPoint2f
Hi, I need to convert an org.opencv.core.Point[] array to a MatOfPoint2f array, And i can not find a way to do it. This is my org.opencv.core.Point[] array named pointsTmp org.opencv.core.Point[]...
View ArticleOpenCV4Android Lower Screen Resolution While Maintaining Fullscreen
I am making an OpenCV app on android that needs a lowered resolution of 640x480 to compensate for the heavy image processing I am doing. I do this in the main activity like so:...
View ArticleOpencv versions and face recognition in android
I am getting confused with opencv versions for android and for other platforms, and the facerecognition methods availability. - As of August 2016, latest opencv available is 2.4.13. But for android,...
View ArticleHow to develop using open CV in Android
Hello, I've installed open CV on Eclipse to develop android apps, but I don't know how to getting started with. I searched on Google to find some tutorials but I didn't found anything. What I want to...
View ArticleGet descriptor values in Android
I'm working on an app that uses ORB in order to detect some buildings. The values of the descriptor returned by the following code written in C++ are stored in a MySql database(my DB communicates with...
View ArticleEye detection and recognition
Hi, I am newbie to Open CV. I am in a situation where I have to decide whether I have to buy IRIS device for eye detection and recognition or I should do RnD to build application using Open CV which...
View ArticleOpenCV installation in Android isn't working
Hi, I want to develop an App for Android 4.0.1 in OpenCV (it is going to be used on Epson Moverio BT2000).There are happening some errors I can not solve. I'm using OpenCV version 3.0.0 and I've...
View ArticleAndroid OpenCV 3.1 seamlessclone
I'm trying to execue the following lines in native OpenCV for Android (C++). And everything compiles. warpedSub.convertTo(warpedSub, CV_8UC3); img2sub.convertTo(img2sub, CV_8UC3);...
View ArticleSaving OpenCV images in Android
I have the Image with DrawMatches() between two Images (one from the database and the other from the user captured Image in his mobile). I need to store this Image automatically in my gallery without...
View ArticleIssue with Camera Orientation
Hi, I'm new on OpenCV and I want to change the camera orientation from landscape to portrait. I found some solutions that involve pixel manipulation in onCameraFrame method (rotate and flip the mat),...
View ArticleUpdating openCV for android
I am developing an android app that uses openCV 2.4.11 and I would like to change the openCV library to 3.0+ version. So that it works on 64bits devices, but i have no idea how to do this? i'm using...
View ArticleHow to fix libpng vulnerability for Play Store
Hi, I'm using OpenCV threw another library (scanlibrary) in an android app. For few weeks Play Store tell me that my APKs are not secure. I searched over the Internet for an answer that works with my...
View ArticleAutofocus camera android is not working
Hi everybody, my problem is the focus with the android camera. You can check my output:  The focus is wrong with near objects, some idea how I can...
View ArticleAndroid Studio, binarization and morphology. with OpenCV
Hello, I'm new to the forum, I program under **android studio**, but I'm new in **OpenCV**, and I need to create an application that apply some filters to an image, especially the **binarization and...
View Articlecreate an overlayer in an image
I would like create an overlayer in an video like this image: https://karanbalkar.com/wp-content/uploads/2013/12/barcode_scanner.png how can I create that?
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