javacv

问题 I have tried to use JavaCV to capture snaps from my webcamera.but when i ran below code i got an exeception.It says the class com/googlecode/javacpp/Pointer is not found. What can i do to solve this error... package camera; /** * * @author asankad */ import static com.googlecode.javacv.cpp.opencv_core.cvFlip; import static com.googlecode.javacv.cpp.opencv_highgui.cvSaveImage; import com.googlecode.javacv.CanvasFrame; import com.googlecode.javacv.FrameGrabber; import com.googlecode.javacv

问题 I am starting my final year project using image processing and was hoping to accomplish something like this. It's a combination of Human and Object detection. I really wanted to do it in Java because I have very little experience in C++. I found JavaCV which is a wrapper to OpenCV. However, it has very little support and virtually no documentation. So I was going to fall back and try to start using the native OpenCV when I stumbled across this JavaDoc on the OpenCV homepage for Java OpenCV.

问题 I am a new to OpenCV library and I would like to use the Java API for openCV. I read instructions in websites regarding how to install openCV and use it as a library in Eclipse. Now what confuses me is, as I want to program in Java should i use JavaCv? or only openCV as the latter has java API as well? kindly please clarify this issue. 回答1: Since version 2.4.4 OpenCV supports Java. You will find a jar in the OpenCV/build/java folder. For details, see this tutorial about using OpenCV Java with

问题 I am using the JavaCV library with pre-built OpenCV libraries for Android. I think I have setup Eclipse the right way, because I have included the jars both javacv.jar and javacpp.jar. In addition, the java-cv-android-arm.jar, in my project. Everything compiles fine, no errors, warning, anything that should be suspicious of something that will go wrong at runtime. But I get NoClassDefFOundError exception that is thrown in this method body below: @Override public void draw(Canvas canvas) { try

问题 I am learning how to use the integral-images using opencv with Java API, and i created a test that displays the grayscale image before using the integral-image and after using it. the grayscale image is 10 x 10, and when i converted it to the integral-image i found it 11 x 11 with extra rows of zeros and extra column of zeros as shown below in the output. please let me know why the integral-image contains extra row and column of zeros? Code : public static void main(String[] args) {

问题 I have made a custom camera in Andorid using Javacv code. I hadn't included all the .so files but only those which seems required for my application. As in the screen shot below: It works well on Samsumg Galaxy S2, S3 and Sony Ericsson Xperia Arc. No problem at all. But when I tried to run it on Samsung P7500 Galaxy Tab 10.1, it crashed on the very first line of Javacv code I have used which happens to be: yuvIplImage = IplImage.create(previewWidth, previewHeight, IPL_DEPTH_8U, 2); Logcat

问题 I am working on an OpenCV project that relies on finger detection. Currently I have an OpenCVFrameGrabber that grabs a frame and places it in an IplImage . I then draw that image onto my GUI. This all works, but the image that is drawn seems to be in black and white even though I have a color camera. There are noticeable vertical lines in the image and when there is some color, it seems to be split into components along these lines. Does anyone know of a way to get the original webcam image?

问题 I'm using the JavaCV FFmpegFrameRecorder class to encode Android's camera preview frames into a video. The goal would be to replicate the result of the following command line: ffmpeg -i input.mp4 -metadata:s:v:0 rotate="90" output.mp4 I modified the startUnsafe() method as follows, but it failed to generate the desired output: if ((video_st = avformat_new_stream(oc, video_codec)) != null) { video_c = video_st.codec(); video_c.codec_id(oformat.video_codec()); video_c.codec_type(AVMEDIA_TYPE

问题 Could someone tell me where I'm doing wrong? These are the steps that I have followed: Downloaded the adt-bundle-windows from android developer website Created a new project and a libs/armeabi folder Extract all the *.so files from javacv-android-arm.jar, opencv-2.4.3-android-arm.zip, and ffmpeg-1.0-android-arm.zip directly into the newly created "libs/armeabi" folder, without creating any new subdirectories. (A part that I don't understand is "Extract all the *.so files from javacv-android

问题 I have recently been getting the following error by attempting to start an instance of JavaCV's FFmpegFrameGrabber: java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil at java.lang.Class.classForName(Native Method) at java.lang.Class.forName(Class.java:324) at org.bytedeco.javacpp.Loader.load(Loader.java:413) at org.bytedeco.javacpp.Loader.load(Loader.java:381) at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2597) at org.bytedeco.javacv.FFmpegFrameGrabber