OpenCV+Java做人脸识别/裁剪

怼烎@ 2022-03-26 12:52 221阅读 0赞

# 安装及配置 #

### 1.首先安装OpenCV ###

[https://opencv.org/releases.html][https_opencv.org_releases.html]

这里我下载的是Windows版的3.4.5

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70][]

然后安装即可……

### 2.Eclipse配置OpenCV ###

**Window->Preferences->Java->User Libraries**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 1][]

**New输入你的Libraries名**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 2][]

这里我的安装目录是D:\\OpenCV，所以是：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 3][]

然后引入dll，我是64位机子，所以是：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 4][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 5][]

Ok,下面创建Java项目做Java与OpenCV的人脸识别~

# 人脸识别 #

创建项目后首先右击选择**Properties**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 7][]

然后引入即可……

引入**haarcascade\_frontalface\_alt.xml**这个xml文件：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 8][]

我的pom文件如下：

<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    
    
    		<dependency>
    			<groupId>org.bytedeco.javacpp-presets</groupId>
    			<artifactId>ffmpeg</artifactId>
    			<version>3.1.2-1.2</version>
    		</dependency>
    		<dependency>
    			<groupId>org.bytedeco</groupId>
    			<artifactId>javacv</artifactId>
    			<version>1.4.1</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.bytedeco.javacpp-presets</groupId>
    			<artifactId>ffmpeg-platform</artifactId>
    			<version>3.4.2-1.4.1</version>
    		</dependency>
    		<dependency>
    			<groupId>commons-io</groupId>
    			<artifactId>commons-io</artifactId>
    			<version>2.4</version>
    		</dependency>
    
    
    		
    		
    		<dependency>
    			<groupId>org.bytedeco</groupId>
    			<artifactId>javacv-platform</artifactId>
    			<version>1.4.1</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.bytedeco.javacpp-presets</groupId>
    			<artifactId>opencv-platform</artifactId>
    			<version>3.4.1-1.4.1</version>
    		</dependency>
    
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>4.12</version>
    			<scope>test</scope>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    	</dependencies>

修改我的端口号：

server.port=8889

最后代码如下：

import java.io.BufferedInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.commons.io.FileUtils;
    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.imgcodecs.Imgcodecs;
    import org.opencv.imgproc.Imgproc;
    import org.opencv.objdetect.CascadeClassifier;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.core.io.Resource;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.multipart.MultipartFile;
    
    /* 
    * @author zzf 
    * @date 2019年1月17日 下午12:04:45 
    */
    @RestController
    public class OpenCVController {
    
    	@Value("classpath:haarcascade_frontalface_alt.xml")
    	private Resource xml;
    
    	@PostMapping("/face")
    	public void FaceDetector(HttpServletResponse response, MultipartFile file) throws IOException {
    		// D:\workspace-sts-3.9.2.RELEASE\OpenCV\src\main\resources
    		// String opencvpath = System.getProperty("user.dir") +
    		// "\\src\\main\\resources\\";
    		// String opencvDllName = opencvpath + Core.NATIVE_LIBRARY_NAME + ".dll";
    		// System.load(opencvDllName);
    		System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    		System.out.println("人脸检测开始……");
    
    		// 创建临时文件，因为boot打包后无法读取文件内的内容
    		File targetXmlFile = new File("src/" + xml.getFilename() + "");
    		FileUtils.copyInputStreamToFile(xml.getInputStream(), targetXmlFile);
    		CascadeClassifier faceDetector = new CascadeClassifier(targetXmlFile.toString());
    		if (faceDetector.empty()) {
    			System.out.println("请引入文件……");
    			return;
    		}
    		// 创建图片tempFile
    		File tempFile = new File("src/" + file.getOriginalFilename() + "");
    		FileUtils.copyInputStreamToFile(file.getInputStream(), tempFile);
    
    		// 读取创建的图片tempFile
    		Mat image = Imgcodecs.imread(tempFile.toString());
    		MatOfRect faceDetections = new MatOfRect();
    		// 进行人脸检测
    		faceDetector.detectMultiScale(image, faceDetections);
    		System.out.println(String.format("检测到人脸： %s", faceDetections.toArray().length));
    		Integer i = 1;
    		// 制图将图填充到image中
    		for (Rect rect : faceDetections.toArray()) {
    			Imgproc.rectangle(image, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height),
    					new Scalar(0, 255, 0), 3);
    			imageCut(tempFile.toString(), i+".jpg", rect.x, rect.y, rect.width, rect.height);// 进行图片裁剪
    			i++;
    		}
    		// 下面部分是返回给页面
    		String filename = file.getOriginalFilename();
    		Imgcodecs.imwrite(filename, image);
    		File imgFile = new File(filename);
    		if (imgFile.exists()) {
    			response.getOutputStream().write(toByteArray(imgFile));
    			response.getOutputStream().close();
    		}
    
    		// 删除临时文件
    		if (targetXmlFile.exists() && targetXmlFile.isFile()) {
    			if (targetXmlFile.delete()) {
    				System.out.println("删除临时文件" + targetXmlFile + "成功！");
    			}
    		}
    		if (imgFile.exists() && imgFile.isFile()) {
    			if (imgFile.delete()) {
    				System.out.println("删除临时文件" + imgFile + "成功！");
    			}
    		}
    		if (tempFile.exists() && tempFile.isFile()) {
    			if (tempFile.delete()) {
    				System.out.println("删除临时文件" + tempFile + "成功！");
    			}
    		}
    	}
    
    	public static void imageCut(String imagePath, String outFile, int posX, int posY, int width, int height) {
    		// 原始图像
    		Mat image = Imgcodecs.imread(imagePath);
    		// 截取的区域：参数,坐标X,坐标Y,截图宽度,截图长度
    		Rect rect = new Rect(posX, posY, width, height);
    		// 两句效果一样
    		Mat sub = image.submat(rect); // Mat sub = new Mat(image,rect);
    		Mat mat = new Mat();
    		Size size = new Size(width, height);
    		Imgproc.resize(sub, mat, size);// 将人脸进行截图并保存
    		Imgcodecs.imwrite(outFile, mat);
    		System.out.println(String.format("图片裁切成功，裁切后图片文件为： %s", outFile));
    
    	}
    
    	public static byte[] toByteArray(File file) throws IOException {
    		File f = file;
    		if (!f.exists()) {
    			throw new FileNotFoundException("file not exists");
    		}
    		ByteArrayOutputStream bos = new ByteArrayOutputStream((int) f.length());
    		BufferedInputStream in = null;
    		try {
    			in = new BufferedInputStream(new FileInputStream(f));
    			int buf_size = 1024;
    			byte[] buffer = new byte[buf_size];
    			int len = 0;
    			while (-1 != (len = in.read(buffer, 0, buf_size))) {
    				bos.write(buffer, 0, len);
    			}
    			return bos.toByteArray();
    		} catch (IOException e) {
    			e.printStackTrace();
    			throw e;
    		} finally {
    			try {
    				in.close();
    			} catch (IOException e) {
    				e.printStackTrace();
    			}
    			bos.close();
    		}
    	}
    
    }

下面来一张我男神们的合照

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 10][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 11][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 12][]

完美~Nice~~

[https_opencv.org_releases.html]: https://opencv.org/releases.html
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTk4MDEx_size_16_color_FFFFFF_t_70 1]: /images/20220326/10ddd89469494f42a78f8d40df931cdb.png
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