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【图像识别】 图像处理和图像分析（leptonica）leptonica-1.68安装配置 （vs2008）

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Leptonica

Leptonica is a pedagogically-oriented open source site containing software that is broadly useful for image processing and image analysis applications.

http://www.leptonica.com/

Featured operations are

  • Rasterop (a.k.a. bitblt)
  • Affine transformations (scaling, translation, rotation, shear) on images of arbitrary pixel depth
  • Binary and grayscale morphology, rank order, and convolution
  • Seedfill and connected components
  • Image transformations combining changes in scale and pixel depth
  • Pixelwise masking, blending, enhancement, arithmetic ops, etc.

Ancillary operations include

  • I/O for standard image formats
  • Utilities to handle arrays of image-related data types
  • Utilities for generic stacks, queues, heaps and lists; and for byte queues and arrays of numbers and strings

Example applications include

  • Octcube-based color quantization, with and without dithering
  • Modified median-cut color quantization, with and without dithering
  • Skew determination of text images
  • Segmentation of page images with mixed text and images
  • jbig2 unsupervised classifier
  • Border representations of 1 bit/pixel images and raster conversion for SVG
  • PostScript generation (levels 1, 2, 3) of images for device-independent output
  • PDF generation (levels 1, 2) of images for device-independent output
  • Dewarping images of text taken with a camera
  • Rendering text on an image
  • Connectivity-preserving thinning and thickening of 1 bit/pixel images
  • Line removal from a grayscale sketch
  • Search for least-cost paths on binary and grayscale images

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最近做个图像识别的东西，需要将图片中的文字识别出来。

使用tesseract ORC，又发现tesseract ORC依赖leptonica，于是，干脆把leptonica也弄弄好了。

http://www.leptonica.com/
可以下载:
leptonica-1.68.tar.gz  //源码 linux
vs2008-1.68.zip  ///源码 Windows vs2008

leptonica-1.68-win32-lib-include-dirs.zip  //头文件和lib

安装gnuplot
环境变量PATH加入 C:\gnuplot\bin(安装路径\bin,可能也是binary)
创建新环境变量GDFONTPATH 值为C:\WINDOWS\Fonts
创建新环境变量GNUPLOT_FONTPATH值为C:\WINDOWS\Fonts

安装IrfanView
环境变量PATH加入C:\Program Files\IrfanView (安装路径)

解压 leptonica-1.68-win32-lib-include-dirs.zip  //头文件和lib

环境变量PATH加入D:\share\leptonica-1.68\lib (解压路径)， 这里如果不加的话，需要将dll放到你的工程目录下。因为运行过程中需要调用liblept168.dll这个动态链接库。否刚的话，肯定会报这个“ liblept168.dll找不到 ”的。

xxx..vcproj 同一个目录

新建一个工程，设置Include files路径和lib库路径

即你解压后的Include


导入lib库

建立link到leptonica的新的空工程,工程配置里linker->input里加入leptonica的lib

link动态库的release版:leptonlib168.dll
ink动态库的debug版:leptonlib168d.dll(168是版本号)
link静态库的release版:
giflib$(GIFLIB_VERSION)-static-mtdll.lib
libjpeg$(LIBJPEG_VERSION)-static-mtdll.lib
libpng$(LIBPNG_VERSION)-static-mtdll.lib
libtiff$(LIBTIFF_VERSION)-static-mtdll.lib
zlib$(ZLIB_VERSION)-static-mtdll.lib
liblept$(LIBLEPT_VERSION)-static-mtdll.lib
link静态库的debug版:

......

如果你找不到GIFLIB_VERSION 类似这些变量的话，写死也行的。就是解压的那些库

giflib416-static-mtdll.lib

giflib416-static-mtdll-debug.lib
libjpeg8c-static-mtdll.lib
libjpeg8c-static-mtdll-debug.lib
libpng143-static-mtdll.lib
libpng143-static-mtdll-debug.lib
libtiff394-static-mtdll.lib
libtiff394-static-mtdll-debug.lib
zlib125-static-mtdll.lib
zlib125-static-mtdll-debug.lib
liblept168.lib
liblept168d.lib

相对来说代码都相当简单了。 

// my-leptonica.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include <allheaders.h>

int _tmain(int argc, _TCHAR* argv[])

{

	PIX          *pixs, *pixt1, *pixt2;

	pixs = pixRead("..\\..\\test\\test.bmp");

	pixDisplayWithTitle(pixs, 700, 500, NULL, 1);

	pixDestroy(&pixs);

	return 0;

}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
以后的笔记潇汀会尽量详细讲解一些相关知识的，希望大家继续关注我的博客。
本节笔记到这里就结束了。

潇汀一有时间就会把自己的学习心得，觉得比较好的知识点写出来和大家一起分享。
编程开发的路很长很长，非常希望能和大家一起交流，共同学习，共同进步。
如果文章中有什么疏漏的地方，也请大家指正。也希望大家可以多留言来和我探讨编程相关的问题。
最后，谢谢你们一直的支持~~~

C++完整个代码示例（代码在VS2005下测试可运行）

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