Tesseract OCR 执行哪些预处理操作? [英] What preprocessing operations are performed by Tesseract OCR?

问题描述

我找不到详细的文档，也没有浏览源代码的感觉.例如，如果 Tesseract 引擎已经完成了精明的边缘检测，我不想重做.

I couldn't find a detailed documentation and I don't feel browsing the source code. I want not to redo canny edge detection for example if it is already done by Tesseract engine.

推荐答案

本文档提供了引擎的概述:https://github.com/tesseract-ocr/docs/blob/master/tesseracticdar2007.pdf

This document provides an overview of the engine: https://github.com/tesseract-ocr/docs/blob/master/tesseracticdar2007.pdf

所以看起来你不需要实现canny边缘检测.

So it looks like you don't need to implement canny edge detection.

Tesseract 在处理之前使用 Otsu 阈值对图像进行二值化 https://github.com/tesseract-ocr/tesseract/blob/master/ccstruct/otsuthr.h

Tesseract uses Otsu thresholding to binarize the image before processing it https://github.com/tesseract-ocr/tesseract/blob/master/ccstruct/otsuthr.h

如果您想查看二值化图像，只需在\tessdata\configs\"中创建一个新的配置文件，添加以下行:tessedit_write_images True 并处理您的图像:tesseractyour_image out your_config_file.Tesseract 将二值化图像保存为 tessinput.tif.

If you want to see the binarized image just create a new config file in "\tessdata\configs\", add this line: tessedit_write_images True and process your image: tesseract your_image out your_config_file. Tesseract saves the binarized image as tessinput.tif.

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