javacv

问题 I have an SBT application that is using JavaCV on Windows. My build.sbt brings in JavaCV and its dependencies using: classpathTypes += "maven-plugin" libraryDependencies += "org.bytedeco" % "javacv" % "0.9" This pulls JavaCV and its dependents (JavaCPP), but it isn't pulling the JAR with the platform specific libraries (opencv-windows-x86_64.jar). This allows me to build, but I get "UnsatisfiedLinkError: no jniopencv_core in java.library.path" Based on http://www.warski.org/blog/2014/01/using

问题 I am using this code for image stitching with JavaCV on Android: public void ImageStitching() { Stitcher stitcher = Stitcher.createDefault(false); MatVector images = new MatVector(2); images.put(0,cvLoadImage("sample1.png")); images.put(1,cvLoadImage("sample2.png")); IplImage result = new IplImage(null); int status = stitcher.stitch(images,result); if( status == Stitcher.OK ) { cvSaveImage("result.png", result); } } But when I execute it, the app crashes and the log shows the following error:

问题 I'm using JavaCV's FFmpegFrameGrabber to retrieve frames from a video file. This FFmpegFrameGrabber return a Frame which basically contain a Buffer[] to hold image pixels for a video frame. Because performance is my top priority, I would like to use OpenGL ES to display this Buffer[] directly without converting it into Bitmap . The view to be displayed is only taking less than half of the screen and following the OpenGL ES document: Developers who want to incorporate OpenGL ES graphics in a

问题 It may be a previously asked related issue regarding JavaCV on Android.My main objective is to apply grayscale/other image effect on video. File sourceFile = new File(Environment.getExternalStorageDirectory() + File.separator + "test.mp4"); FFmpegFrameGrabber ffg = new FFmpegFrameGrabber(sourceFile); OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage(); try { ffg.start(); int count = 0; while (true) { Log.d("JAVA_CV", "Counting . . . " + count); Frame original

问题 We tried to convert the c++ Code from Detection of coins (and fit ellipses) on an image into Java. After solving the first problem in the thread Problems with OpenCV ellipse detection in Java, starting the program with the parameters 2 PathToThePicture leads to following fatal error # # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000005addc330, pid=1700, tid=1472 # # JRE version: Java(TM) SE Runtime Environment (7.0

问题 I'd like to create a video with transparency (and semi transparency) in android. The images of the source video are split into two images, the top one with color information (looks like the normal video image), the bottom one with alpha information (the same shapes but only in black and white and gray, black means transparent). This is the solution for iOS: https://medium.com/@quentinfasquel/ios-transparent-video-with-coreimage-52cfb2544d54 What would be the best way to to this in android?

问题 We tried to convert the c++ Code from Detection of coins (and fit ellipses) on an image into Java. When we start the program with the parameters 2 PathToThePicture it crashes with this error: OpenCV Error: Bad argument (Array should be CvMat or IplImage) in cvGetSize, file ..\..\..\..\opencv\modules\core\src\array.cpp, line 1238 Exception in thread "main" java.lang.RuntimeException: ..\..\..\..\opencv\modules \core\src\array.cpp:1238: error: (-5) Array should be CvMat or IplImage in function

问题 I have to convert an IplImage to a BufferedImage... what should be a simple task is becoming very intricate for me. I'm using JavaCv 1.0 on Mac OSX (which links with OpenCV 3.0). In the old JavaCV API there was the IplImage method #getBufferedImage, but I can't find it anymore in new 1.0 API. So I tried to convert IplImage to byte array and byte array to BufferedImage. I found this solution to perform such conversion: IplImage inputImg = cvLoadImage(imgName); //imgName is a JPEG absolute path

问题 At this moment I worked on recognition forms. It's perfect with camera of my computer, but now I would like test with a camera on network. I use JavaCV (OpenCV apply to Java). This is my code: public static void main(String[] args) throws Exception { OpenCVFrameGrabber grabber = new OpenCVFrameGrabber("http://192.168.1.210:5500/snapshot.cgi?user=admin&pwd=123456"); grabber.setFormat("mjpeg"); grabber.start(); for (int k=0; k<20000; k++){ System.out.print(k); } IplImage frame = grabber.grab();

问题 I am trying to implement a face recognizer in java. I got this code example and made changes to fit my requirements on how the system should behave. It works but then when I have images of the same person in different light intensities its efficiency drops. I read that there is a library inserted in openCV for faceRecognizer but then its samples are implemented in c++. Is there any way i can use this library to code in java? and also if we can use it then will it increase the efficiency of