Android/Java: 查找图片匹配(大图包含小图)
创始人
2024-08-20 06:01:37
0

在Android/Java中,可以使用OpenCV库来进行图像匹配。下面是一个使用OpenCV库进行图像匹配的示例代码:

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfFloat;
import org.opencv.core.MatOfInt;
import org.opencv.core.MatOfPoint;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.core.CvType;
import org.opencv.core.CvType.*;
import org.opencv.core.MatOfPoint2f;
import org.opencv.core.MatOfByte;
import org.opencv.core.MatOfDMatch;
import org.opencv.core.DMatch;
import org.opencv.core.Point;
import org.opencv.core.RotatedRect;
import org.opencv.core.TermCriteria;
import org.opencv.core.CvException;
import org.opencv.core.CvType;
import org.opencv.core.CvType.*;
import org.opencv.core.Core.MinMaxLocResult;
import org.opencv.core.MatOfDMatch;
import org.opencv.core.DMatch;
import org.opencv.core.MatOfKeyPoint;
import org.opencv.core.KeyPoint;
import org.opencv.core.Core.MinMaxLocResult;
import org.opencv.core.Core.MinMaxLocResult;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.core.TermCriteria;
import org.opencv.core.CvType;
import org.opencv.core.CvType.*;
import org.opencv.core.MatOfPoint2f;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.RotatedRect;
import org.opencv.features2d.FeatureDetector;
import org.opencv.features2d.DescriptorExtractor;
import org.opencv.features2d.DescriptorMatcher;
import org.opencv.features2d.Features2d;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.utils.Converters;

public class ImageMatcher {
    public static void main(String[] args) {
        // 加载图像
        Mat largeImage = Imgcodecs.imread("path_to_large_image.jpg");
        Mat smallImage = Imgcodecs.imread("path_to_small_image.jpg");

        // 创建特征检测器、描述符提取器和描述符匹配器
        FeatureDetector detector = FeatureDetector.create(FeatureDetector.SIFT);
        DescriptorExtractor extractor = DescriptorExtractor.create(DescriptorExtractor.SIFT);
        DescriptorMatcher matcher = DescriptorMatcher.create(DescriptorMatcher.FLANNBASED);

        // 在大图像中检测关键点和计算描述符
        MatOfKeyPoint keypoints1 = new MatOfKeyPoint();
        Mat descriptors1 = new Mat();
        detector.detectAndCompute(largeImage, new Mat(), keypoints1, descriptors1);

        // 在小图像中检测关键点和计算描述符
        MatOfKeyPoint keypoints2 = new MatOfKeyPoint();
        Mat descriptors2 = new Mat();
        detector.detectAndCompute(smallImage, new Mat(), keypoints2, descriptors2);

        // 匹配描述符
        MatOfDMatch matches = new MatOfDMatch();
        matcher.match(descriptors1, descriptors2, matches);

        // 筛选出最佳匹配
        DMatch[] matchesArray = matches.toArray();
        double maxDist = 0;
        double minDist = Double.MAX_VALUE;
        for (int i = 0; i < matchesArray.length; i++) {
            double dist = matchesArray[i].distance;
            if (dist < minDist) minDist = dist;
            if (dist > maxDist) maxDist = dist;
        }

        // 选择合适的匹配点
        MatOfDMatch goodMatches = new MatOfDMatch();
        for (int i = 0; i < matchesArray.length; i++) {
            if (matchesArray[i].distance < 3 * minDist) {
                goodMatches.push_back(new MatOfDMatch(matchesArray[i]));
            }
        }

        // 绘制匹配结果
        Mat outputImage = new Mat();
        Features2d.drawMatches(largeImage, keypoints1, smallImage, keypoints2,
                goodMatches, outputImage, Scalar.all(-1), Scalar.all(-1), new MatOfByte(), 2);

        // 显示匹配结果
        Highgui.imwrite("path_to_output_image.jpg", outputImage);
    }
}

在上述代码中,首先加载了大

相关内容

热门资讯

安装apache-beam==... 出现此错误可能是因为用户的Python版本太低,而apache-beam==2.34.0需要更高的P...
避免在粘贴双引号时向VS 20... 在粘贴双引号时向VS 2022添加反斜杠的问题通常是由于编辑器的自动转义功能引起的。为了避免这个问题...
Android Recycle... 要在Android RecyclerView中实现滑动卡片效果,可以按照以下步骤进行操作:首先,在项...
omi系统和安卓系统哪个好,揭... OMI系统和安卓系统哪个好?这个问题就像是在问“苹果和橘子哪个更甜”,每个人都有自己的答案。今天,我...
原生ios和安卓系统,原生对比... 亲爱的读者们,你是否曾好奇过,为什么你的iPhone和安卓手机在操作体验上有着天壤之别?今天,就让我...
Android - 无法确定任... 这个错误通常发生在Android项目中,表示编译Debug版本的Java代码时出现了依赖关系问题。下...
Android - NDK 预... 在Android NDK的构建过程中,LOCAL_SRC_FILES只能包含一个项目。如果需要在ND...
Akka生成Actor问题 在Akka框架中,可以使用ActorSystem对象生成Actor。但是,当我们在Actor类中尝试...
Agora-RTC-React... 出现这个错误原因是因为在 React 组件中使用,import AgoraRTC from “ago...
Alertmanager在pr... 首先,在Prometheus配置文件中,确保Alertmanager URL已正确配置。例如:ale...