7段显示OCR [英] 7-Segment Display OCR

问题描述

我正在使用Tesseract（一个OCR库）构建一个iOS应用程序（拍照并在其上运行OCR），它使用写得好的数字和字符（使用常用字体）非常好用。

I'm building an iOS application (take a picture and run OCR on it) using Tesseract (an OCR library) and it is working very well with well written numbers and characters (using usual fonts).

我遇到的问题是如果我在7段显示器上试用它会产生非常糟糕的结果。

The problem I am having is that if I try it on a 7-Segment Display, it gives very very bad results.

所以我的问题是：有谁知道我怎么能解决这个问题？ Tesseract有没有办法识别这些字符？

So my question is: Does anyone know how I can approach this problem? Is there a way for Tesseract to recognize these characters?

推荐答案

我也很难让tesseract识别图像中的数字液晶显示器。

I too had great difficulty in getting tesseract to recognize digits from images of LCD displays.

通过使用ImageMagick对图像进行预处理，将图像副本叠加在自身上，并略微垂直移动以填充段之间的间隙，我获得了一些微不足道的成功：

I had some marginal success by preprocessing the images with ImageMagick to overlay a copy of the image on itself with a slight vertical shift to fill in the gaps between segments:

$ composite -compose Multiply -geometry +0+3  foo.tif foo.tif foo2.png

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最后，我的优点是七段光学字符识别二进制： http：//www.unix-ag.uni-kl .de / ~aurswal / ssocr /

非常感谢作者Erik Auerswald的代码！

Many thanks to the author, Erik Auerswald, for this code!

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