在Java语言编程中，如何使用java启用电脑的摄像头摄相拍照？

注意：需要访问网址： ， 下载一个OpenCV软件包。这里下载最新版本：opencv-3.2.0-vc14.exe并解压此文件到D:softwareopencv目录中。

项目结构如下图所示 –

添加一个用户自定义库：OpenCV3.2，并指配置构建路径为：D:softwareopencvopencvbuildjavax64，如下图所示 –

注：可参考：

以下是使用Java从系统摄像头拍摄快照的程序 –

package com.yiibai; import java.awt.image.BufferedImage; import java.awt.image.DataBufferByte; import java.awt.image.WritableRaster; import java.io.FileNotFoundException; import java.io.IOException; import javafx.application.Application; import javafx.embed.swing.SwingFXUtils; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.image.ImageView; import javafx.scene.image.WritableImage; import javafx.stage.Stage; import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.videoio.VideoCapture; public class TakingSnapshotUsingCamera extends Application { Mat matrix = null; @Override public void start(Stage stage) throws FileNotFoundException, IOException { // Capturing the snapshot from the camera TakingSnapshotUsingCamera obj = new TakingSnapshotUsingCamera(); WritableImage writableImage = obj.capureSnapShot(); // Setting the image view ImageView imageView = new ImageView(writableImage); // setting the fit height and width of the image view imageView.setFitHeight(400); imageView.setFitWidth(600); // Setting the preserve ratio of the image view imageView.setPreserveRatio(true); // Creating a Group object Group root = new Group(imageView); // Creating a scene object Scene scene = new Scene(root, 600, 400); // Setting title to the Stage stage.setTitle("启用摄向头照像"); // Adding scene to the satge stage.setScene(scene); // Displaying the contents of the stage stage.show(); } public WritableImage capureSnapShot() { WritableImage WritableImage = null; // Loading the OpenCV core library System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // Instantiating the VideoCapture class (camera:: 0) VideoCapture capture = new VideoCapture(0); // Reading the next video frame from the camera Mat matrix = new Mat(); capture.read(matrix); // If camera is opened if (capture.isOpened()) { // If there is next video frame if (capture.read(matrix)) { // Creating BuffredImage from the matrix BufferedImage image = new BufferedImage(matrix.width(), matrix.height(), BufferedImage.TYPE_3BYTE_BGR); WritableRaster raster = image.getRaster(); DataBufferByte dataBuffer = (DataBufferByte) raster.getDataBuffer(); byte[] data = dataBuffer.getData(); matrix.get(0, 0, data); this.matrix = matrix; // Creating the Writable Image WritableImage = SwingFXUtils.toFXImage(image, null); } } return WritableImage; } public static void main(String args[]) { launch(args); } }

在执行上面示例代码成功后，应该会看到如下输出 –

问题

F:workspjavaexamplesjava_opencv Exception in thread "main" java.lang.UnsatisfiedLinkError: no opencv_java320 in java.library.path at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at com.yiibai.CopyAndPasteAnImage.main(CopyAndPasteAnImage.java:13)

解决上述问题可通过参考：

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