[Android] Can one use the Img_hash module -
Hi, Can I use the Img_hash module in an android app ? Using solely java ? because I downloaded the opencv_contrib, and it doesn't clear to me, what I should do for starting to use it.. Thank's,
View ArticleCan't open video file in android
I tried to open some MP4 videos with VideoCapture, but it failed. I also tried some AVI videos, it resulted in the same. I can use Android APIs to save mp4 videos and open them. Why OpenCV can't? My...
View ArticleCould I access android camera by c++ api(opencv4)?
As the title mentioned, try to google by the keywords "OpenCV4 android camera" or "OpenCV4 android camera c++" but cannot find the answers like "yes" or "no", I remember opencv3 do not support this...
View ArticleAutonomous robot, line following and Aruco detection. Android Java
Hi guys, firstly let me thank you for this fantastic library that I´m using on my final mechanical degree project. Basically I´m using a Lego EV3 Mindstorm robot to simulate a warehouse environment, he...
View ArticleWhat is counter ?
When i process image and find counters its print like this [{123.0, 144.0}, {123.0, 145.0}, {122.0, 146.0}, {121.0, 147.0}, {120.0, 148.0}, {119.0, 149.0}, {118.0, 150.0}, {117.0, 151.0}, {116.0,...
View ArticleLaplace image sharpen in android
i need to sharp an image. Trying to use Lapacian filter but get the same figure as output. Can't find the error in the code
View ArticleI am building and document scanner application and facing issue with...
I want the output as image  I have tried to implement blob detection for detection black circles located at corner, but it is not detecting the black...
View ArticleHow to fix 'only black frames receiving' in Android with OpenCV
I was developing a Augmented Reality feature similar to [inkHunter](http://inkhunter.tattoo) for a mobile application using python and openCV. The code worked well as I expected even-though it had...
View ArticleBuild opencv with cuda for ARM?
I need to build opencv with cuda support for ARM (Android). Is it possible?
View ArticleMy Question is about opencv_createsamples
I read your comment on a question but ı dont undertstand how ı can solve the problem. Could you please help me? I try to train a haar cascade and I cannot create a vector file from positive images. I...
View ArticleAndroid CameraBridgeViewBase - deliverAndDrawFrame insights
Hi all, I have a question regarding the `protected void deliverAndDrawFrame(CvCameraViewFrame frame)` method available in `CameraBridgeViewBase`. I've tried to use it in the way exemplified by...
View ArticleAndroid DNN tutorial
Hi I'm having issues with running the example at https://docs.opencv.org/3.4/d0/d6c/tutorial_dnn_android.html and I'm getting this error: 2019-05-26 19:36:02.333 23779-23862/com.example.dnntutorial...
View ArticleHow to get xpos and ypos value using FindContours
Hello I'm trying to recognize image contours using OpenCV4 with Android Studio(kotlin). However, I don't know how to get xpos and ypos value from MatOfPoint variables. ( MatOfPoint variables is output...
View ArticleUsing opencv with android studio
Hi openCV commutnity, I am trying to make android application using the opencv functionality for edge detection, i have all the functions ready with me in java which i have developed taking cue from...
View ArticleImported module not shows up on 'Add Module Dependency' dialog
So I'm trying to add OpenCV as a dependency for my Android Studio project. And I've followed this tutorial https://github.com/davidmigloz/go-bees/wiki/Setup-OpenCV-3.1.0-in-Android-Studio-2.2 . So at...
View ArticleHow to compare two pictures on the similarity?
My task is to compare 2 pictures and tell if they are similar. First, I find the histograms of each image and compare them with a measure of similarity. Next, I compare the obtained distance with a...
View ArticleAndroid Color background document not detects Document Edges
I am working Auto Edge detection On CameraFrame,It Does not Detect Document Edges.Please help Me out. My Code try { return findLargestRectangle(inputFrame.rgba()); } catch (Exception e) {...
View ArticleBest resources on OpenCV is now available on Packt just for $ 10
**[OpenCV 4 Computer Vision Application Programming Cookbook - Fourth...
View ArticleNeed help in resolving error in Kalman filter implementation in Java using...
I am implementing a Kalman filter using opencv's Kalman filter implementation for a movement data in 3D (X,Y,Z) coordinates. The model uses acceleration and velocity model for s = s(0) + v*t +...
View ArticlefindContours() with detailed images
Hi all, I am implementing a custom barcode code reader (to read custom codes that look like a QR-code) with openCV on Android. At some point, I am using findContours() with tree hierarchy. My problem...
View Article