图片识别文字， OCR

文章引用自： https://www.cnblogs.com/stone_w/archive/2011/10/08/2202397.html

方式一、Asprise-OCR的使用。

Asprise-OCR下载地址：

其中需要使用的3个dll是AspriseOCR.dll、DevIL.dll、ILU.dll。

需要注意的是这几个.dll是vc写的引用要在程序中用DllImport引用，关键代码：

[DllImport("AspriseOCR.dll", EntryPoint = "OCR", CallingConvention = CallingConvention.Cdecl)]

public static extern IntPtr OCR(string file, int type);

[DllImport("AspriseOCR.dll", EntryPoint = "OCRpart", CallingConvention = CallingConvention.Cdecl)]

static extern IntPtr OCRpart(string file, int type, int startX, int startY, int width, int height);

[DllImport("AspriseOCR.dll", EntryPoint = "OCRBarCodes", CallingConvention = CallingConvention.Cdecl)]

static extern IntPtr OCRBarCodes(string file, int type);

[DllImport("AspriseOCR.dll", EntryPoint = "OCRpartBarCodes", CallingConvention = CallingConvention.Cdecl)]

static extern IntPtr OCRpartBarCodes(string file, int type, int startX, int startY, int width, int height);

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