opencv使用中出現的問題

最近項目遇到一個問題，springboot2在打包過程中出現的問題；

1、引用本地的jar包，怎麼打包到項目；

pom.xml 配置
   dependencies標籤配置
   <!--打包本地jar包-->
   <dependency>
       <groupId>org.opencv</groupId>
       <artifactId>opencv</artifactId>
       <version>0.0.1</version>
       <scope>system</scope>
       <systemPath>${project.basedir}/src/main/resources/lib/opencv-440.jar</systemPath>
   </dependency>
   
   其中，version爲必填，嘗試過省略，報錯；
   plugins標籤配置
   <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-compiler-plugin</artifactId>
       <version>3.8.1</version>
       <configuration>
           <source>1.8</source>
           <target>1.8</target>
           <encoding>UTF-8</encoding>
           <compilerArguments>
               <!-- 打包本地jar包 -->
               <extdirs>${project.basedir}/src/main/resources/lib</extdirs>
           </compilerArguments>
       </configuration>
   </plugin>
   <plugin>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-maven-plugin</artifactId>
       <configuration>
           <includeSystemScope>true</includeSystemScope>
       </configuration>
   </plugin>
   
   
   resources標籤 配置
   <resources>
       <resource>
           <directory>${project.basedir}/src/main/resources</directory>
           <includes>
               <include>lib/*.jar</include>
           </includes>
       </resource>
       <resource>
           <directory>${project.basedir}/src/main/resources</directory>
           <includes>
               <include>lib/*.dll</include>
           </includes>
       </resource>
       <resource>
           <directory>${project.basedir}/src/main/resources</directory>
           <includes>
               <include>*.yml</include>
           </includes>
       </resource>
       <resource>
           <directory>${project.basedir}/src/main/resources</directory>
           <includes>
               <include>*/*.xml</include>
           </includes>
       </resource>
       <resource>
           <directory>${project.basedir}/src/main/resources</directory>
           <includes>
               <include>*/*.json</include>
           </includes>
       </resource>
   </resources>

2、opencv使用人臉識別過程中，需要引入haarcascade_frontalface_alt2.xml文件，如果放在項目的lib文件中，在打包的過程中能夠打到包裏，但是在動態引用的過程中，由於jar包中文件的引用出現混亂路徑的情況，找不到文件。找到一個折中的辦法，haarcascade_frontalface_alt2.xml文件放到固定目錄下，再引用的時候，只需要讀取固定的路徑即可。

  yml文件配置
  path:
    resourcePath: C:\haarcascade_frontalface_alt2.xml # 人臉識別的xml配置文件

   NativeConfig.java類

package com.hake.smart.configration;

import com.hake.smart.ymlconfig.YmlConfigUtil;
import lombok.extern.slf4j.Slf4j;
import org.opencv.core.*;
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.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.ClassUtils;

import javax.annotation.Resource;
import java.util.Arrays;

/**
 * @Author: Liu Yue
 * @Descripition:
 * @Date; Create in 2020/8/25 15:59
 **/
@Configuration
@Slf4j
public class NativeConfig {

    @Resource
    private YmlConfigUtil ymlConfigUtil;

    @Value("${path.resourcePath}")
    private static String resourcePath;

    @Value(value = "${path.resourcePath}")
    private void setResourcePath(String  resourcePath){
        this.resourcePath = resourcePath ;
    }
    @Bean
    public NativeConfig initFrontalface(){
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        log.error("路徑：{}",resourcePath);

        faceDetector = new CascadeClassifier(resourcePath);
        return new NativeConfig();
    }
    /**
     * 測試OpenCV是否能運行：需要自行修改圖片位置
     * @throws Exception 測試是否成功
     */
    static CascadeClassifier faceDetector;

/*    static {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        //String url = "C:/hake/gitremote/hakesmartacceptback/target/classes/lib/haarcascade_frontalface_alt2.xml";
        //ClassPathResource("lib/haarcascade_frontalface_alt2.xml");
        *//*ClassPathResource resource = new ClassPathResource("lib/haarcascade_frontalface_alt2.xml");
        String path = resource.getPath();
        path = basepath + path;*//*
        URL urlClass = ClassLoader.getSystemResource("lib/haarcascade_frontalface_alt2.xml");
        String path = urlClass.getPath();
        log.error("路徑：{}",path);
        path = path.substring(1,path.length());
        faceDetector = new CascadeClassifier(path);
    }*/

    private Mat conv_Mat(String img_1) {
        Mat image0 = Imgcodecs.imread(img_1);

        Mat image = new Mat();
        //灰度轉換
        Imgproc.cvtColor(image0, image, Imgproc.COLOR_BGR2GRAY);

        MatOfRect faceDetections = new MatOfRect();
        //探測人臉
        faceDetector.detectMultiScale(image, faceDetections);

        // rect中是人臉圖片的範圍
        for (Rect rect : faceDetections.toArray()) {
            //切割rect人臉
            Mat mat = new Mat(image, rect);
            return mat;
        }
        return null;
    }
    //比較圖片相似度
    public Boolean compare_image(String img_1, String img_2) {
        Mat mat_1 = conv_Mat(img_1);
        Mat mat_2 = conv_Mat(img_2);

        Mat hist_1 = new Mat();
        Mat hist_2 = new Mat();

        //顏色範圍
        MatOfFloat ranges = new MatOfFloat(0f, 256f);
        //直方圖大小， 越大匹配越精確 (越慢)
        MatOfInt histSize = new MatOfInt(1000);

        Imgproc.calcHist(Arrays.asList(mat_1), new MatOfInt(0), new Mat(), hist_1, histSize, ranges);
        Imgproc.calcHist(Arrays.asList(mat_2), new MatOfInt(0), new Mat(), hist_2, histSize, ranges);

        // CORREL 相關係數
        double res = Imgproc.compareHist(hist_1, hist_2, Imgproc.CV_COMP_CORREL);
        log.info("OPENCV人臉相似度：{}",res);
        int lifePhotostandard = ymlConfigUtil.getLifePhotostandard();
        log.info("相識度標準：{}",lifePhotostandard);
        boolean bl = res * 100 > lifePhotostandard ? true:false;

        return bl;
    }
}

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