Tesseract不使用路径变量

问题描述

为什么我的Tesseract实例要求我显式设置数据路径，但又不想读取环境变量?

Why does my Tesseract instance require me to explicitly set my datapath, but doesn't want to read the environment variable?

让我澄清一下:运行代码

Let me clarify: running the code

ITesseract tesseract = new Tesseract();
String result = tesseract.doOCR(myImage);

引发错误:

Error opening data file ./tessdata/eng.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to the
parent directory of your "tessdata" directory.

我已经设置了环境变量，即正在执行

I already have set my environment variable, ie doing

echo $TESSDATA_PREFIX returns /usr/share/tessdata/

现在，在我的代码中显式设置路径变量，即:

Now, setting the path variable explicitly in my code, ie:

Itesseract tesseract = new Tesseract();
tesseract.setDatapath("/usr/share/tessdata/");
String result = tesseract.doOCR(myImage);

可以正常工作.为什么?我正在使用Manjaro 17.0.5

WORKS PERFECTLY. Why?I'm using Manjaro 17.0.5

推荐答案

该库最初旨在使用捆绑在其tessdata文件夹中的数据文件.对于您的情况，如果要从标准tessdata目录中读取，则需要按以下方式设置数据路径:

The library was initially designed to use the data files bundled in its tessdata folder. In your case, if you want to read from the standard tessdata directory, you would want to set datapath as follows:

tesseract.setDatapath(System.getenv("TESSDATA_PREFIX"));

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