删除目标图

EasyAR 提供了两种方式处理不再需要的识别图：永久删除和临时停用。为了保证生产环境的稳定性，建议您仔细阅读以下操作说明。

通过 EasyAR Web 管理中心操作

操作步骤：登录 EasyAR 开发中心 -> 云识别管理 -> 选择对应图库 -> 点击管理进入图库管理界面。
删除方式：
- 批量删除：在列表中勾选目标图，点击删除并确认即可。
- 单个删除：点击进入目标图详情页，点击页面内的删除按钮。

删除操作引导

警告

删除操作不可逆。一旦确认删除，该图像的所有特征数据及关联信息将永久丢失。建议先在测试图库中验证流程，严禁直接在生产环境进行破坏性测试。

最佳实践：目标图停用

在大多数业务场景下，如果您不确定是否未来还会用到某张图，推荐使用停用代替删除。

功能特点：停用后的目标图保留在数据库列表中，但不会参与云识别搜索过程。但会占用识别配额。
停用方法：在管理界面勾选识别图，点击停用即可。

停用操作引导

API 停用：通过调用更新目标图 API，将 active 属性设置为 0。

使用 API 删除目标图

通过 REST API 可以实现识别图的自动化清理。

准备工作

开始前请阅读删除目标图 API 文档，并准备好以下资源：

CRS AppId
API Key / Secret 或 Token
Server-end URL (443 端口)
TargetId：待删除目标图的唯一 ID。若 TargetId 不存在，API 将返回 statusCode: 404 (Target not found)。

请替换占位符为实际参数，并运行 curl 脚本

Your-Server-side-URL → 实际 API Host
Your-Token → 实际的 API Key Authorization Token
Your-CRS-AppId → 您的 appId
Your-todo-TargetId → 待删除目标 targetId

curl -X DELETE "https://<Your Server-side-URL>/target/<Your-todo-TargetId>?appId=<Your-CRS-AppId>" \
  -H "Content-Type: application/json" \
  -H "Authorization: <Your-Token>"

下载 Java 示例代码

Java Samples Download

通过 Maven 方式导入项目

Step 1. 打开相关代码文件 RemoveTarget.java

Step 2. 修改全局变量，替换你准备清单里的认证参数

CRS AppId
API Key / API Secret
TARGET_MGMT_URL → Server-end URL
TARGET_ID → 待删除目标 targetId

public class RemoveTarget {

    private static final String TARGET_MGMT_URL = "https://cn1.crs.easyar.com";
    private static final String CRS_APPID       = "--here is your CRS AppId--";
    private static final String API_KEY         = "--here is your API Key--";
    private static final String API_SECRET      = "--here is your API Secret--";
    private static final String TARGET_ID       = "my_targetid";
    /* TO_DEL_IDs lists all the targetIds to be removed
     * must be separated by ","
     */
    private static final String TO_DEL_IDs = "targetId1,targetId2,targetId3";

    public String remove(Auth auth, String targetId) throws IOException {
        okhttp3.Request request = new okhttp3.Request.Builder()
                .url(auth.getCloudURL()+"/target/"+targetId+"?"+ Common.toParam(
                        Auth.signParam(new JSONObject(), auth.getAppId(), auth.getApiKey(), auth.getApiSecret())
                ))
                .delete()
                .build();
        return new OkHttpClient.Builder().build().newCall(request).execute().body().string();
    }

    public String removeMultiTargets(Auth auth, String targetIds) throws IOException {
        JSONObject params = new JSONObject().put("targetId", targetIds);
        Auth.signParam(params, auth.getAppId(), auth.getApiKey(), auth.getApiSecret());
        RequestBody requestBody = FormBody.create(MediaType.parse("application/json; charset=utf-8")
                , params.toString());
        okhttp3.Request request = new okhttp3.Request.Builder()
                .url(auth.getCloudURL() + "/targets")
                .delete(requestBody)
                .build();
        return new OkHttpClient.Builder().build().newCall(request).execute().body().string();
    }
    public static void main(String[] args) throws IOException{
        Auth accessInfo  =  new Auth(CRS_APPID, API_KEY, API_SECRET, TARGET_MGMT_URL);
        System.out.println(new RemoveTarget().remove(accessInfo, TARGET_ID));
        System.out.println(new RemoveTarget().removeMultiTargets(accessInfo, TO_DEL_IDs));
    }
}

Step 3. 运行 Main

下载 NodeJS 示例代码

NodeJS Samples Download

Step 1. 配置密钥文件 keys.json

CRS AppId
API Key / API Secret
to-delete-targetId

{
  "appId": "--here is your appId for CRS App Instance for SDK 4--",
  "apiKey": "--here is your api key which is create from website and which has crs permission--",
  "apiSecret": "--here is your api secret which is create from website--"
}

Step 2. 运行，指定密钥文件以及 Server-end URL

node bin/deleteTarget <to-delete-targetId> -t <Server-end-URL> -c keys.json

var argv = require('yargs')
    .usage('Usage: $0 [targetId] -t [host] -c [keys]')
    .demand(1)
    .default('t', 'http://localhost:8888').alias('t', 'host')
    .default('c', 'keys.json').alias('c', 'keys')
    .help('h').alias('h', 'help')
    .epilog('copyright 2015, sightp.com')
    .argv;

var fs = require('fs');

var targetId = argv._[0];
var host = argv.host;
var keys = JSON.parse(fs.readFileSync(argv.keys));

var farmer = require('../farmer')(host, keys.appKey, keys.appSecret);

farmer.deleteTarget(targetId)
.then(function(resp) {
    console.log(resp.result.targetId);
})
.fail(function(err) {
    console.log(err);
});

deleteTarget 调用云服务接口，示例代码在 farmer.js

function deleteTarget(targetId) {
    return Q.promise(function(resolve, reject) {
        request.del(host + '/target/' + targetId)
        .query(signParams())
        .end(done(resolve, reject));
    });
}

下载 Php 示例代码

PHP Samples Download

Step 1. 打开入口代码 demo.php

Step 2. 修改全局变量，替换你准备清单里的认证参数

CRS AppId
API Key / API Secret
Server-end URL
toDeleteTargetId

<?php
include 'EasyARClientSdkCRS.php';
$apiKey = 'API Key';
$apiSecret = 'API Secret';
$crsAppId = 'CRS AppId'
$crsCloudUrl = 'https://cn1-crs.easyar.com';
$toDeleteTargetId = 'to-delete-targetId';

$sdk = new EasyARClientSdkCRS($apiKey, $apiSecret, $crsAppId, $crsCloudUrl);

$rs = $sdk->delete($toDeleteTargetId);
if ($rs->statusCode == 0) {
  print_r($rs->result);
} else {
  print_r($rs);
}

Step 3. 运行 php demo.php

新建相关代码文件 delete_target.py，修改全局变量，然后运行

pip install requests
python delete_target.py

import time
import hashlib
import requests

# --- 全局变量配置 ---
API_KEY = "YOUR_API_KEY"
API_SECRET = "YOUR_API_SECRET"
APP_ID = "YOUR_APP_ID"
HOST = "https://crs-cn1.easyar.com" 
TARGET_ID = "TARGET_ID"

def main():
    timestamp = str(int(time.time() * 1000))
    
    params = {
        'apiKey': API_KEY,
        'appId': APP_ID,
        'timestamp': timestamp
    }

    sorted_keys = sorted(params.keys())
    sign_str = "".join([f"{k}{params[k]}" for k in sorted_keys]) + API_SECRET
    signature = hashlib.sha256(sign_str.encode('utf-8')).hexdigest()

    url = f"{HOST}/target/{TARGET_ID}"
    final_params = {**params, 'signature': signature}

    print(f"Requesting DELETE {url}...")
    response = requests.delete(url, params=final_params)
    print(f"Response: {response.text}")

if __name__ == "__main__":
    main()

新建相关代码文件 main.go，修改全局变量，然后运行

go run main.go

main.go:

package main

import (
  "crypto/sha256"
  "fmt"
  "io"
  "net/http"
  "sort"
  "strconv"
  "time"
)

var (
  ApiKey    = "YOUR_API_KEY"
  ApiSecret = "YOUR_API_SECRET"
  AppId     = "YOUR_APP_ID"
  Host      = "https://crs-cn1.easyar.com"
  TargetId  = "TARGET_ID"
)

func main() {
  ts := strconv.FormatInt(time.Now().UnixNano()/1e6, 10)
  params := map[string]string{
    "apiKey":    ApiKey,
    "appId":     AppId,
    "timestamp": ts,
  }

  keys := make([]string, 0, len(params))
  for k := range params { keys = append(keys, k) }
  sort.Strings(keys)

  builder := ""
  for _, k := range keys { builder += k + params[k] }
  builder += ApiSecret
  signature := fmt.Sprintf("%x", sha256.Sum256([]byte(builder)))

  url := fmt.Sprintf("%s/target/%s?apiKey=%s&appId=%s&timestamp=%s&signature=%s", 
    Host, TargetId, ApiKey, AppId, ts, signature)
  
  req, _ := http.NewRequest("DELETE", url, nil)
  resp, _ := http.DefaultClient.Do(req)
  defer resp.Body.Close()
  body, _ := io.ReadAll(resp.Body)
  fmt.Printf("Response: %s\n", string(body))
}

在 Cargo.toml 中添加 reqwest, tokio, sha2, hex 依赖。

执行 cargo run。

use sha2::{Sha256, Digest};
use std::collections::BTreeMap;
use std::time::{SystemTime, UNIX_EPOCH};

const API_KEY: &str = "YOUR_API_KEY";
const API_SECRET: &str = "YOUR_API_SECRET";
const APP_ID: &str = "YOUR_APP_ID";
const HOST: &str = "https://crs-cn1.easyar.com";
const TARGET_ID: &str = "YOUR_TARGET_ID";

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let ts = SystemTime::now().duration_since(UNIX_EPOCH)?.as_millis().to_string();

    let mut params = BTreeMap::new();
    params.insert("apiKey", API_KEY);
    params.insert("appId", APP_ID);
    params.insert("timestamp", &ts);

    let mut sign_str = String::new();
    for (k, v) in &params {
        sign_str.push_str(k);
        sign_str.push_str(v);
    }
    sign_str.push_str(API_SECRET);
    
    let mut hasher = Sha256::new();
    hasher.update(sign_str.as_bytes());
    let signature = hex::encode(hasher.finalize());

    let url = format!("{}/target/{}?apiKey={}&appId={}&timestamp={}&signature={}", 
                      HOST, TARGET_ID, API_KEY, APP_ID, ts, signature);
    
    let res = reqwest::Client::new().delete(url).send().await?;
    println!("Response: {}", res.text().await?);
    Ok(())
}

创建 .NET 控制台项目。

dotnet new console
dotnet run

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Net.Http;

class Program {
    static string API_KEY = "API_KEY";
    static string API_SECRET = "API_SECRET";
    static string APP_ID = "APP_ID";
    static string HOST = "https://crs-cn1.easyar.com";
    static string TARGET_ID = "TARGET_ID";

    static async System.Threading.Tasks.Task Main() {
        string timestamp = DateTimeOffset.Now.ToUnixTimeMilliseconds().ToString();

        var dict = new SortedDictionary<string, string> {
            { "apiKey", API_KEY },
            { "appId", APP_ID },
            { "timestamp", timestamp }
        };

        StringBuilder sb = new StringBuilder();
        foreach (var kv in dict) sb.Append(kv.Key).Append(kv.Value);
        sb.Append(API_SECRET);
        
        string signature = Sha256(sb.ToString());

        using var client = new HttpClient();
        string query = string.Join("&", dict.Select(x => $"{x.Key}={x.Value}")) + $"&signature={signature}";
        string url = $"{HOST}/target/{TARGET_ID}?{query}";
        
        var response = await client.DeleteAsync(url);
        Console.WriteLine($"Result: {await response.Content.ReadAsStringAsync()}");
    }

    static string Sha256(string str) {
        byte[] bytes = SHA256.HashData(Encoding.UTF8.GetBytes(str));
        return BitConverter.ToString(bytes).Replace("-", "").ToLower();
    }
}

运行环境
- Unity 2020 LTS 以上版本
- Scripting Backend：Mono 或 IL2CPP 均可
- API Compatibility Level：.NET Standard 2.1（推荐）

Step 1：准备图片文件

Assets/
└── Scripts/
     └── DeleteImageTarget.cs

按照 Assets 目录名
- 复制下面示例代码 DeleteImageTarget.cs

using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

public class DeleteImageTarget : MonoBehaviour
{
    [Header("Config")]
    public string targetId = "Your targetId";
    public string apiBaseUrl = "https://Your-Server-end-URL";
    public string authorizationToken = "YOUR API KEY AUTH TOKEN"; 
    public string crsAppId = "CRS-AppId"; 

    private void Start()
    {
        StartCoroutine(DeleteTarget());
    }

    private IEnumerator DeleteTarget()
    {
     
        string url =
            $"{apiBaseUrl}/target/{targetId}?appId={crsAppId}";

        UnityWebRequest request = UnityWebRequest.Delete(url);
        request.downloadHandler = new DownloadHandlerBuffer();

        request.SetRequestHeader("Content-Type", "application/json");
        request.SetRequestHeader("Authorization", authorizationToken);

        yield return request.SendWebRequest();

        if (request.result == UnityWebRequest.Result.Success)
        {
            Debug.Log("Delete target success:");
            Debug.Log(request.downloadHandler.text);
        }
        else
        {
            Debug.LogError("Delete target failed:");
            Debug.LogError(request.error);
            Debug.LogError(request.downloadHandler.text);
        }
    }
}

在 Unity Editor 中：
- 创建一个空 GameObject
- 命名为 DeleteTarget
- 将 DeleteImageTarget 脚本拖到该对象上

Step 3：配置参数（Inspector）

在 Inspector 面板中修改：
- Api Url
- Authorization Token
- Crs App Id
- Target Id : 待删除目标图的 targetId
只需修改这几项即可运行，填入准备清单准备好的参数

Step 4：运行

点击 Play
在 Console 中查看结果：
- 成功：返回 JSON（含 targetId）
- 失败：HTTP / 错误信息

相关主题：

Table of Contents

删除目标图

通过 EasyAR Web 管理中心操作

警告

最佳实践：目标图停用

使用 API 删除目标图

准备工作