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OCRHelper.cs
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OCRHelper.cs
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/*
* 作用:通过 Tesseract 实现图片文字识别。
* Tesseract 下载地址:https://www.nuget.org/packages/Tesseract/
* 语言包地址:https://github.com/tesseract-ocr/langdata
* 联系:QQ 100101392
* 来源:https://github.com/snipen/Helper.Core.Library
* */
using System.Drawing;
using Tesseract;
namespace Helper.Core.Library
{
public class OCRHelper
{
#region 对外公开方法
/// <summary>
/// 图片文字识别
/// </summary>
/// <param name="imageUrl">图片路径</param>
/// <param name="tessdataUrl">语言包路径</param>
/// <param name="language">语言包名称</param>
/// <param name="variableData">设置识别变量,默认识别数字</param>
/// <param name="pageSegMode">PageSegMode</param>
/// <returns></returns>
public static string Identity(string imageUrl, string tessdataUrl, string language = "eng", string variableData = "0123456789", PageSegMode pageSegMode = PageSegMode.Auto)
{
Bitmap bitmap = null;
TesseractEngine tesseractEngine = null;
Page page = null;
try
{
bitmap = new Bitmap(imageUrl);
tesseractEngine = new TesseractEngine(tessdataUrl, language, EngineMode.Default);
if (!string.IsNullOrEmpty(variableData)) tesseractEngine.SetVariable("tessedit_char_whitelist", variableData);
page = tesseractEngine.Process(PixConverter.ToPix(bitmap), pageSegMode);
return page.GetText();
}
catch
{
throw;
}
finally
{
if (bitmap != null) bitmap.Dispose();
if (page != null) page.Dispose();
if (tesseractEngine != null) tesseractEngine.Dispose();
}
}
#endregion
}
}