首先登陆百度开发者中心,搜索文字识别服务:
创建一个应用,获取AppID、APIKey、SecretKey秘钥信息:
下载C# SDK,将AipSdk.dll动态库导入Unity:
本文以通用文字识别为例,查阅官方文档,以下是通用文字识别的返回数据结构:
在Unity中定义相应的数据结构:
代码语言:javascript复制using System;
/// <summary>
/// 通用文字识别
/// </summary>
[Serializable]
public class GeneralOcr
{
/// <summary>
/// 图像方向 -1未定义 0正弦 1逆时针90度 2逆时针180度 3逆时针270度
/// </summary>
public int direction;
/// <summary>
/// 唯一的log id,用于问题定位
/// </summary>
public int log_id;
/// <summary>
/// 识别结果数,表示words_result的元素个数
/// </summary>
public int words_result_num;
/// <summary>
/// 定位和识别结果数组
/// </summary>
public string[] words_result;
/// <summary>
/// 行置信度信息
/// </summary>
public Probability probability;
}
/// <summary>
/// 行置信度信息
/// </summary>
[Serializable]
public class Probability
{
/// <summary>
/// 行置信度平均值
/// </summary>
public int average;
/// <summary>
/// 行置信度方差
/// </summary>
public int variance;
/// <summary>
/// 行置信度最小值
/// </summary>
public int min;
}
下面是调用时传入的相关参数:
封装调用函数:
代码语言:javascript复制using System;
using System.Collections.Generic;
using UnityEngine;
public class OCR
{
//以下信息于百度开发者中心创建应用获取
private const string appID = "";
private const string apiKey = "";
private const string secretKey = "";
/// <summary>
/// 通用文字识别
/// </summary>
/// <param name="bytes">图片字节数据</param>
/// <param name="language">识别语言类型 默认CHN_ENG中英文混合</param>
/// <param name="detectDirection">是否检测图像朝向</param>
/// <param name="detectLanguage">是否检测语言,当前支持中、英、日、韩</param>
/// <param name="probability">是否返回识别结果中每一行的置信度</param>
/// <returns></returns>
public static GeneralOcr General(byte[] bytes, string language = "CHN_ENG", bool detectDirection = false, bool detectLanguage = false, bool probability = false)
{
var client = new Baidu.Aip.Ocr.Ocr(apiKey, secretKey);
try
{
var options = new Dictionary<string, object>
{
{ "language_type", language },
{ "detect_direction", detectDirection },
{ "detect_language", detectLanguage },
{ "probability", probability }
};
var response = client.GeneralBasic(bytes, options);
GeneralOcr generalOcr = JsonUtility.FromJson<GeneralOcr>(response.ToString());
return generalOcr;
}
catch (Exception error)
{
Debug.LogError(error);
}
return null;
}
}
以上是传入图片字节数据调用接口的方式,也可以通过URL调用,只需将GeneralBasic换为重载函数GeneralBasicUrl:
测试图片:
代码语言:javascript复制OCR.General(File.ReadAllBytes(Application.dataPath "/Picture.jpg"));