GVision.java

import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.vision.v1.*;
import com.google.protobuf.ByteString;
import com.google.type.LatLng;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

class VisionSingleton {
    private static ImageAnnotatorClient client;

    public static ImageAnnotatorClient getImageAnnotatorClient() {
        if (client == null) {
            GoogleCredentials credentials;
            File credentialsPath = new File("cred.json");
            try {
                credentials = GoogleCredentials.fromStream(new FileInputStream(credentialsPath));
            } catch (IOException e) {
                return null;
            }
            ImageAnnotatorSettings settings = null;
            try {
                settings = ImageAnnotatorSettings.newBuilder().setCredentialsProvider(
                        FixedCredentialsProvider.create(credentials)
                ).build();
            } catch (IOException e) {
                return null;
            }
            try {
                client = ImageAnnotatorClient.create(settings);
            } catch (IOException e) {
                return null;
            }
        }
        return client;
    }
}

public class GVision {
    ImageAnnotatorClient Client;

    GVision() throws IOException {
        Client = VisionSingleton.getImageAnnotatorClient();
    }
    private Image getImagefromPath(String filepath) throws IOException {
        Path path = Paths.get(filepath);
        byte[] data = Files.readAllBytes(path);
        ByteString imgBytes = ByteString.copyFrom(data);
        Image img = Image.newBuilder().setContent(imgBytes).build();
        return img;
    }
    public void getWebDetectionThings(String filepath) throws IOException {
        
        Image img = getImagefromPath(filepath);

        List<AnnotateImageRequest> requests = new ArrayList<>();

        Feature feat = Feature.newBuilder()

                .setType(Feature.Type.WEB_DETECTION)
                .build();


        AnnotateImageRequest request = AnnotateImageRequest.newBuilder()
                .addFeatures(feat)
                .setImage(img)
                .build();

        requests.add(request);

        BatchAnnotateImagesResponse resp = Client.batchAnnotateImages(requests);
        List<AnnotateImageResponse> responseList = resp.getResponsesList();

        for (AnnotateImageResponse imageResponse : responseList) {
            WebDetection detection = imageResponse.getWebDetection();
            List<WebDetection.WebLabel> labels = detection.getBestGuessLabelsList();
            for (WebDetection.WebLabel label : labels) {
                System.out.println(label.getLabel());
            }
        }

    }

    public void getLandmarkDetection(String filepath) throws IOException {
        //Bizim Memleketi Landmarktan Saymamak ne demektir yahu.

        Image img = getImagefromPath(filepath);

        List<AnnotateImageRequest> requests = new ArrayList<>();

        Feature feat = Feature.newBuilder()

                .setType(Feature.Type.LANDMARK_DETECTION)
                .build();


        AnnotateImageRequest request = AnnotateImageRequest.newBuilder()
                .addFeatures(feat)
                .setImage(img)
                .build();

        requests.add(request);

        BatchAnnotateImagesResponse resp = Client.batchAnnotateImages(requests);
        List<AnnotateImageResponse> responseList = resp.getResponsesList();

        for (AnnotateImageResponse annotateImageResponse : responseList) {
            List<EntityAnnotation> entities = annotateImageResponse.getLandmarkAnnotationsList();
            for (EntityAnnotation annotation : entities) {
                LocationInfo info = annotation.getLocationsList().listIterator().next();
                String desc = annotation.getDescription();
                LatLng lang = info.getLatLng();
                System.out.printf("Nerede: %s %s", desc, lang);
            }
        }
    }
    public String textDetection(String filepath) throws IOException {
        Image img = getImagefromPath(filepath);
        List<AnnotateImageRequest> requests = new ArrayList<>();

        Feature feat = Feature.newBuilder()

                .setType(Feature.Type.TEXT_DETECTION)
                .build();

        AnnotateImageRequest request = AnnotateImageRequest.newBuilder()
                .addFeatures(feat)
                .setImage(img)
                .build();

        requests.add(request);

        BatchAnnotateImagesResponse resp = Client.batchAnnotateImages(requests);
        List<AnnotateImageResponse> responseList = resp.getResponsesList();
        final String[] texts=new String[responseList.size()];
        int i=0;
        for (AnnotateImageResponse annotateImageResponse : responseList) {
           texts[i++]= annotateImageResponse.getFullTextAnnotation().getText();

        }

        String result="";

        for(String text:texts){
            result+=text;
        }
        return result;
    }
}