Tag: opencv

OpenCV 2.4.4 Java – 抓取网络摄像头图片/流（OSX）

我是Stackoverflow和OpenCV编程领域的新手。 我用OpenCV Bindings for Java（opencv.org官员，而不是JavaCV）制作了一些项目，比如通过ORB和SURFfunction进行对象识别，处理图像。 一切还好。 现在我正在转向video流中的对象识别。 我想从网络摄像头抓取流并应用对象识别。 我不是Java大师，所以我在OpenCV中找到了VideoCapture类，但是我无法从相机中获取图片。 我在OSX Mountain Lion中使用OpenCV 2.4.4绑定在Eclipse中运行我的项目。 控制台中的结果： Hello, OpenCV Camera OK? Frame Obtained Captured Frame Width 0 Invalid memory access of location 0x7fae00000000 rip=0x7fff8b4c5263 代码： import org.opencv.core.Mat; import org.opencv.highgui.Highgui; import org.opencv.highgui.VideoCapture; public class Webcam { public static void main (String args[]){ System.out.println(“Hello, OpenCV”); // Load the native library. […]

在Java绑定中通过OpenCV Mat循环

我正在尝试将C ++方法从我之前使用OpenCV收到的答案转换为使用OpenCV Java绑定的Java C ++代码： cv::Mat gray; cv::Mat element = cv::getStructuringElement(cv::MORPH_CROSS, cv::Size(2 * erosion_size + 1, 2 * erosion_size + 1), cv::Point(erosion_size, erosion_size) ); cv::erode(gray, gray, element); // Scan the image searching for points and store them in a vector std::vector points; cv::Mat_::iterator it = gray.begin(); cv::Mat_::iterator end = gray.end(); for (; it != end; […]

使用contrib模块和Java包装器构建OpenCV

我尝试在Windows 7机器上构建OpenCV。 要包含contrib模块，我在CMake-gui中添加OPENCV_EXTRA_MODULES_PATH。 opencv-300.jar和opencv-300.dll已创建但我找不到Java类来使用额外的模块。 我错过了make配置中的选项吗？ 是否可以使用Java中的额外模块？

在C ++（opencv）中将Base64（字符串或字节数组）转换为mat（图像）

Base-64到Mat转换opencv： 需要： 我需要在opencv中将convert base-64 string to Mat格式，需要将图像从java发送到C ++（opencv Code）。 我做的步骤： 情况1： In C++ ： 使用以下链接将mat编码为stringstream并将字符串流解码为c ++（opencv）： OpenCV cv :: mat to std :: ifstream for base64 encoding – 运行良好。 但是当我使用java中的base64字符串，将其转换为stringstream并用于解码时，会发生运行时错误（bad-alloc-error） 案例2： 为了检查从java传递到c ++的base64字符串是否相同，我使用了在线工具（ http://codebeautify.org/base64-to-image-converter ）。图像保持不变，所以我认为从java传递到c ++的base64字符串不会更改。 情形3： In Java ： 在java中，base64字符串使用字节数组转换为image。 In C++ ： 尝试在c ++中解码字节数组。但它也会在运行时导致相同的错误。 我想知道有没有其他方法可以在c ++（opencv）中将base64字符串转换为mat（图像）或者我在上面尝试的方法中做的任何其他改进。 Base64字符串： 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

Opencv – 检测眼睛是闭合还是开放

嗨，大家好我正在研究一个项目，我们正在试图检测眼睛是闭合的还是在图片中打开……我们到目前为止所做的是我们检测到了眼睛然后是眼睛然后我们应用了hough变换希望当眼睛睁开时，虹膜将是唯一的圆圈问题是当眼睛闭合时……它也产生一个圆圈 这是代码： import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.core.MatOfRect; import org.opencv.core.Point; import org.opencv.core.Rect; import org.opencv.core.Scalar; import org.opencv.core.Size; import org.opencv.highgui.Highgui; import org.opencv.objdetect.CascadeClassifier; import org.opencv.imgproc.Imgproc; public class FaceDetector { public static void main(String[] args) { System.loadLibrary(Core.NATIVE_LIBRARY_NAME); System.out.println(“\nRunning FaceDetector”); CascadeClassifier faceDetector = new CascadeClassifier(“D:\\CS\\opencv\\sources\\data\\haarcascades\\haarcascade_frontalface_alt.xml”); CascadeClassifier eyeDetector = new CascadeClassifier(“D:\\CS\\opencv\\sources\\data\\haarcascades\\haarcascade_eye.xml”); Mat image = Highgui.imread(“C:\\Users\\Yousra\\Desktop\\images.jpg”); Mat gray = Highgui.imread(“C:\\Users\\Yousra\\Desktop\\eyes\\E7.png”); String faces; […]

关键点匹配只能工作两次……？ （java opencv）

我有一个非常奇怪的问题。 我正在使用此代码来检测另一个图像（java opencv）： 更新的代码： public void startRecognition() { //load images, I want to find img_object in img_scene Mat img_scene = Highgui.imread(“D:/opencvws/ImageRecognition/src/main/resources/ascene.jpg”); Mat img_object = Highgui.imread(“D:/opencvws/ImageRecognition/src/main/resources/aobj1.jpg”); run++; System.out.println(“RUN NO: ” + run); //init detector FeatureDetector detector = FeatureDetector.create(FeatureDetector.SURF); //keypoint detection for both images (keyponts_scene for img_scene, keypoint_object for img_object) MatOfKeyPoint keypoints_object = new MatOfKeyPoint(); MatOfKeyPoint keypoints_scene […]

在Android中使用OpenCV的本机function

我想使用OpenCV + Android，使用原生函数。 但是我有点困惑如何使用位图作为参数以及如何返回已编辑的位图（或Mat）的值。 所以例如我有一个原生函数： #include #include #include JNIEXPORT ??? JNICALL Java_com_my_package_name_and_javaclass_myFunction(JNIEnv* env, jobject javaThis, cv::Mat mat1){ //here will be code to perform filtering, blurring, canny edge detection or similar things. //so I want to input a bitmap, edit it and send it back to the Android class. return ??? } 所以我在这里使用cv :: Mat作为参数。 我知道这是错的，但我不确定它应该是什么，以及在相应的java类中应该是什么。 […]

图像处理和字符提取

我正在试图找出处理角色图像所需的技术。 具体来说，在这个例子中，我需要提取带圆圈的＃标签。 你可以在这里看到它： 任何实现都会有很大的帮助。

opencv混合（叠加）两个不同通道的图像

我想用opencv覆盖两个图像（可能是不同的格式（通道）。最初我使用addWeighted，但是它在两个不同通道的图像上失败。在opencv中有什么方法可以处理这种情况吗？谢谢

无法解析相应的jni函数opencv Android

这是我得到错误。我正确加载opencv库但我得到这个错误。如果我进入ximgproc所有本机方法都红色标记为“无法解析相应的jni函数name_function”。我如何解决？ protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) { Uri uri = data.getData(); try { Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri); //Log.i(“prova”,uri.toString()); ImageView imageView = (ImageView) findViewById(R.id.imageView); // imageView.setImageBitmap(bitmap); Mat g=new Mat(bitmap.getHeight(),bitmap.getWidth(), CvType.CV_8UC1); Utils.bitmapToMat(bitmap,g,true); SuperpixelSLIC […]