java 指纹识别库 SourceAFIS

添加指纹识别库依赖

    <dependencies>
        <!-- https://mvnrepository.com/artifact/com.machinezoo.sourceafis/sourceafis -->
        <dependency>
            <groupId>com.machinezoo.sourceafis</groupId>
            <artifactId>sourceafis</artifactId>
            <version>3.11.0</version>
        </dependency>
    </dependencies

指纹核验（1：1）

public static void main(String[] args) throws IOException {
        byte[] probeImage = Files.readAllBytes(Paths.get("F:\\ye\\fingerprint\\1.jpg"));
        byte[] candidateImage = Files.readAllBytes(Paths.get("F:\\ye\\fingerprint\\1.jpg"));

        FingerprintTemplate probe = new FingerprintTemplate(
                new FingerprintImage()
                        .dpi(500)
                        .decode(probeImage));

        FingerprintTemplate candidate = new FingerprintTemplate(
                new FingerprintImage()
                        .dpi(500)
                        .decode(candidateImage));

        double score = new FingerprintMatcher()
                .index(probe)
                .match(candidate);
        System.out.println(score);
        double threshold = 40;
        boolean matches = score >= threshold;
        System.out.println(matches);

    }

指纹识别（1：N）

 public static void main(String[] args) throws IOException {
        List<UserFingerprint> candidates = new ArrayList<>();

//        加载指纹
        String path = "F:\\ye\\fingerprint";
        File file = new File(path);		//获取其file对象
        File[] fs = file.listFiles();	//遍历path下的文件和目录，放在File数组中
        for(File f:fs){					//遍历File[]数组
            byte[] finger = Files.readAllBytes(Paths.get(f.getAbsolutePath()));

            FingerprintTemplate candidate = new FingerprintTemplate(
                    new FingerprintImage()
                            .dpi(500)
                            .decode(finger));
            UserFingerprint userFingerprint = new UserFingerprint();
            userFingerprint.setUserId(f.getName().split("\\.")[0]);
            userFingerprint.setTemplate(candidate);
            candidates.add(userFingerprint);
        }

        byte[] probeImage = Files.readAllBytes(Paths.get("F:\\ye\\probe\\left1.jpg"));

        FingerprintTemplate probe = new FingerprintTemplate(
                new FingerprintImage()
                        .dpi(500)
                        .decode(probeImage));

        UserFingerprint userFingerprint = find(probe, candidates);
        System.out.println(userFingerprint.getUserId());

    }


    static UserFingerprint find(FingerprintTemplate probe, List<UserFingerprint> candidates) {
        FingerprintMatcher matcher = new FingerprintMatcher()
                .index(probe);
        UserFingerprint match = null;
        double high = 0;
        for (UserFingerprint candidate : candidates) {
            double score = matcher.match(candidate.template);
            if (score > high) {
                high = score;
                match = candidate;
            }
        }
        double threshold = 40;
        return high >= threshold ? match : null;
    }

public class UserFingerprint {
    String userId;
    FingerprintTemplate template;
}

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