本文提供了使用Java SDK对给定的图片进行相似图检索的示例代码。相似图检索帮助您从图库中检索出与给定的图片相似的若干张图片。

说明 具体参数说明请参见图像检索

准备工作

在进行具体的服务调用之前,请参考以下步骤,完成准备工作:
  1. 创建阿里云AccessKeyId和AccessKeySecret。具体请参考创建AccessKey
  2. 安装Java依赖。具体请参考安装Java依赖

传入URL示例代码

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.green.model.v20180509.ImageSyncScanRequest;
import com.aliyuncs.http.FormatType;
import com.aliyuncs.http.HttpResponse;
import com.aliyuncs.http.MethodType;
import com.aliyuncs.http.ProtocolType;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.profile.IClientProfile;

import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        IClientProfile profile = DefaultProfile
            .getProfile("cn-shanghai", "请填写您的accessKeyId", "请填写您的accessKeySecret");
        DefaultProfile
            .addEndpoint("cn-shanghai", "cn-shanghai", "Green", "green.cn-shanghai.aliyuncs.com");
        IAcsClient client = new DefaultAcsClient(profile);

        // 指定api返回格式、请求方法
        ImageSyncScanRequest imageSyncScanRequest = new ImageSyncScanRequest();
        imageSyncScanRequest.setAcceptFormat(FormatType.JSON);
        imageSyncScanRequest.setMethod(MethodType.POST);
        imageSyncScanRequest.setEncoding("utf-8");
        imageSyncScanRequest.setProtocol(ProtocolType.HTTP);


        JSONObject httpBody = new JSONObject();
        /**
         * 设置要检测的场景, 计费是按照该处传递的场景进行 
         * similarity: similarity表示进行相似图检索
         */
        httpBody.put("scenes", Arrays.asList("similarity"));

        /**
         * 设置待检测图片, 一张图片一个task,
         * 多张图片同时检测时,处理的时间由最后一个处理完的图片决定。
         * 通常情况下批量检测的平均rt比单张检测的要长, 一次批量提交的图片数越多,rt被拉长的概率越高
         * 这里以单张图片检测作为示例, 如果是批量图片检测,请自行构建多个task
         */
        JSONObject task = new JSONObject();
        task.put("dataId", UUID.randomUUID().toString());

        //设置待检索的图片链接
        task.put("url", "https://img.alicdn.com/tfs/xxx-600-600.jpg"); 
        httpBody.put("tasks", Arrays.asList(task));

        imageSyncScanRequest.setHttpContent(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(httpBody.toJSONString()),
            "UTF-8", FormatType.JSON);

        /**
         * 请设置超时时间, 服务端全链路处理超时时间为10秒,请做相应设置
         * 如果您设置的ReadTimeout 小于服务端处理的时间,程序中会获得一个read timeout 异常
         */
        imageSyncScanRequest.setConnectTimeout(3000);
        imageSyncScanRequest.setReadTimeout(10000);
        HttpResponse httpResponse = null;
        try {
            httpResponse = client.doAction(imageSyncScanRequest);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //服务端接收到请求,并完成处理返回的结果
        if (httpResponse != null && httpResponse.isSuccess()) {
            JSONObject scrResponse = JSON.parseObject(org.apache.commons.codec.binary.StringUtils.newStringUtf8(httpResponse.getHttpContent()));
            System.out.println(JSON.toJSONString(scrResponse, true));
            int requestCode = scrResponse.getIntValue("code");
            //每一张图片的检测结果
            JSONArray taskResults = scrResponse.getJSONArray("data");
            if (200 == requestCode) {
                for (Object taskResult : taskResults) {
                    //单张图片的处理结果
                    int taskCode = ((JSONObject) taskResult).getIntValue("code");
                    //图片要检测的场景的处理结果, 如果是多个场景,则会有每个场景的结果
                    JSONArray sceneResults = ((JSONObject) taskResult).getJSONArray("results");
                    if (200 == taskCode) {
                        for (Object sceneResult : sceneResults) {
                            String scene = ((JSONObject) sceneResult).getString("scene");
                            String suggestion = ((JSONObject) sceneResult).getString("suggestion");
                            //根据suggetion做相关处理 
                            System.out.println("suggestion = [" + suggestion + "]");
                        }
                    } else {
                        //单张图片处理失败, 原因是具体的情况详细分析
                        System.out.println("task process fail. task response:" + JSON.toJSONString(taskResult));
                    }
                }
            } else {
                /**
                 * 表明请求整体处理失败,原因视具体的情况详细分析
                 */
                System.out.println("the whole image scan request failed. response:" + JSON.toJSONString(scrResponse));
            }
        }
    }

}

传入本地文件示例代码

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.green.model.v20180509.ImageSyncScanRequest;
import com.aliyuncs.green.extension.uploader.ClientUploader;
import com.aliyuncs.http.FormatType;
import com.aliyuncs.http.HttpResponse;
import com.aliyuncs.http.MethodType;
import com.aliyuncs.http.ProtocolType;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.profile.IClientProfile;

import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        IClientProfile profile = DefaultProfile
            .getProfile("cn-shanghai", "请填写您的accessKeyId", "请填写您的accessKeySecret");
        DefaultProfile
            .addEndpoint("cn-shanghai", "cn-shanghai", "Green", "green.cn-shanghai.aliyuncs.com");
        IAcsClient client = new DefaultAcsClient(profile);

        // 指定api返回格式、请求方法
        ImageSyncScanRequest imageSyncScanRequest = new ImageSyncScanRequest();
        imageSyncScanRequest.setAcceptFormat(FormatType.JSON);
        imageSyncScanRequest.setMethod(MethodType.POST);
        imageSyncScanRequest.setEncoding("utf-8");
        imageSyncScanRequest.setProtocol(ProtocolType.HTTP);


        JSONObject httpBody = new JSONObject();
        /**
         * 设置要检测的场景, 计费是按照该处传递的场景进行 
         * similarity: similarity表示进行相似图检索
         */
        httpBody.put("scenes", Arrays.asList("similarity"));

        /**
         * 设置待检测图片, 一张图片一个task,
         * 多张图片同时检测时,处理的时间由最后一个处理完的图片决定。
         * 通常情况下批量检测的平均rt比单张检测的要长, 一次批量提交的图片数越多,rt被拉长的概率越高
         * 这里以单张图片检测作为示例, 如果是批量图片检测,请自行构建多个task
         */
        JSONObject task = new JSONObject();
        task.put("dataId", UUID.randomUUID().toString());
    ClientUploader uploader = ClientUploader.getImageClientUploader(client);
        try{
            url = uploader.uploadFile("d:/test.jpg");
        }catch (Exception e){
            e.printStackTrace();
        }
        //设置待检索的图片链接
        task.put("url", url); 
        httpBody.put("tasks", Arrays.asList(task));

        imageSyncScanRequest.setHttpContent(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(httpBody.toJSONString()),
            "UTF-8", FormatType.JSON);

        /**
         * 请设置超时时间, 服务端全链路处理超时时间为10秒,请做相应设置
         * 如果您设置的ReadTimeout 小于服务端处理的时间,程序中会获得一个read timeout 异常
         */
        imageSyncScanRequest.setConnectTimeout(3000);
        imageSyncScanRequest.setReadTimeout(10000);
        HttpResponse httpResponse = null;
        try {
            httpResponse = client.doAction(imageSyncScanRequest);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //服务端接收到请求,并完成处理返回的结果
        if (httpResponse != null && httpResponse.isSuccess()) {
            JSONObject scrResponse = JSON.parseObject(org.apache.commons.codec.binary.StringUtils.newStringUtf8(httpResponse.getHttpContent()));
            System.out.println(JSON.toJSONString(scrResponse, true));
            int requestCode = scrResponse.getIntValue("code");
            //每一张图片的检测结果
            JSONArray taskResults = scrResponse.getJSONArray("data");
            if (200 == requestCode) {
                for (Object taskResult : taskResults) {
                    //单张图片的处理结果
                    int taskCode = ((JSONObject) taskResult).getIntValue("code");
                    //图片要检测的场景的处理结果, 如果是多个场景,则会有每个场景的结果
                    JSONArray sceneResults = ((JSONObject) taskResult).getJSONArray("results");
                    if (200 == taskCode) {
                        for (Object sceneResult : sceneResults) {
                            String scene = ((JSONObject) sceneResult).getString("scene");
                            String suggestion = ((JSONObject) sceneResult).getString("suggestion");
                            //根据suggetion做相关处理 
                            System.out.println("suggestion = [" + suggestion + "]");
                        }
                    } else {
                        //单张图片处理失败, 原因是具体的情况详细分析
                        System.out.println("task process fail. task response:" + JSON.toJSONString(taskResult));
                    }
                }
            } else {
                /**
                 * 表明请求整体处理失败,原因视具体的情况详细分析
                 */
                System.out.println("the whole image scan request failed. response:" + JSON.toJSONString(scrResponse));
            }
        }
    }

}