How to detect rectangle from image crop that rectangle and remove other...
Hello all, I am developing an application for detect driving license and capture image of driving license using surface view and detect driving license and crop from those it's four corner using...
View ArticleHow to extract signature from driving license card?
Hello, I am developing license verification application in android. So right now i want to extract signature from driving license using OpenCV in android. Please suggest any best solution.
View ArticleHow to find rectangle edges from image and crop image from it's edges?
Hello, I am developing an application for detect driving license and capture image of driving license using surface view and and crop from those it's four corner using openCV. so right now i am using...
View ArticleAndroid OpenCV Tensorflow crashes with CvException because of native Memory leak
Hi, I'm loading a default tensorflow dnn model with: val config = getPath("ssd_mobilenet_v1_coco_2017_11_17.pbtxt", this) val model = getPath("frozen_inference_graph.pb", this) net =...
View ArticlegetOutputSizes operation return null in JavaCamera2View of Android SDK
1. android.util.Size[] sizes = map.getOutputSizes(ImageFormat.class); 2. android.util.Size[] sizes = map.getOutputSizes(ImageFormat.JPEG); The first one is from the source code of a deme of Android...
View ArticleAndroid JavaCameraView only have 18 fps
In the other non-opencv camera demo, it has 25fp. The only operation I do in main activity just return inputFrame.rgba(). Do anyone know how solve this problem? Thanks in advance!
View ArticleChange object color with the same range
Hi, I'm new, I have an application in android using opencv. I need to change the color of a object region and the ouput still have the same lightness (V channel) and constrast with the original image,...
View ArticleAndroid OpenCV 3.4.1 DNN tutorial broken
https://docs.opencv.org/master/d0/d6c/tutorial_dnn_android.html I am trying to follow this tutorial verbatim Mat blob = Dnn.blobFromImage(frame, IN_SCALE_FACTOR, new Size(IN_WIDTH, IN_HEIGHT), new...
View Articlehow to find the axes x,y,z opencv android?
I'm using OpenCV on android. I already found the 4 points that surround the marker Now I need to find the x, y, z coordinates and draw on the screen enter image description here This is my current...
View ArticleAndroid Studio and OpenCV - Cascade Object Detector - Location of Object
Hello! I'm making a project which would allow visually impaired people to 'see' through the use of OpenCV's cascade object detector. As of now, I've already gotten all my cascades to work and I'm...
View ArticleHow to show modifed camera result in another view?
Hi, I have accessed camera, now I want to do some operation on this result and want to show the modified result (modified Mat) in another view, How can I achieve this. Lets say from RGB to Gray scale,...
View ArticleWhy does switchToSelectiveSearchQuality() cause fatal signal in Android?
I am using the Ximgproc library of opencv contrib to generate object proposals in Android Studio. When using gs.switchToSingleStrategy() or gs.switchToSelectiveSearchFast() my code works fine, but when...
View ArticleWhy huge performance gap between opencv c++ native and java code on Android?
Hi guys, just wonder if anybody have hit similar case? The strange thing is: the android java code, e.g., GaussianBlur() is stably 4~5x fast, comparing to calling the same function in c++ native code...
View ArticleCascade Classifier - Can't detect banana(object) with an image
Hi, I have example for detecting banana with opencv realtime and it's work. but now I want to try detecting banana with an image use the same xample, but i always can't get the MatOfRect objects....
View ArticleCascade Classifier - Can't detect banana(object) with an image
Hi, I have example for detecting banana with opencv realtime and it's work. but now I want to try detecting banana with an image use the same xample, but i always can't get the MatOfRect objects....
View ArticleAndroid HOGDescriptor return a 0x1 descriptor array
Hi everyone, I have imported opencv in my android project. I am trying to find some number containg contours then compute HOG on it for classification. Main problem I am facing now. In visual studio...
View ArticleOpenCV License in a Free Android APP with purchases
Hi! I am building an Android App Wich is Free but it have purchases. The app is for backgound change (Photos) and other things, eg: you upload a photo and change the background. the core of the app is...
View ArticleAndroid Studio Setup / NDK
I'm experienced with OpenCV on Python and Java, and am trying to integrate it into an Android app. I'm following along with some tutorials online (for example, this one...
View ArticleOpencv for android ignoring inputFrame
I'm trying to create a simple helloworld in android, but not sure why it's not displayed what I return from onCameraFrame. I'm using opencv 3.4.1 on android 8.0.0. This dosen't draw anything: @Override...
View ArticleAndroid ABI
Hello, I'm wondering if anyone uses OpenCV with android and tries to add an extra module from OpenCV Contrib library, Do you face a problem with ABI Supported (X86 - X86_64 - arm64 are not found ) what...
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