如何对特定的矩形区域内提取一个pdf文档的文本？ [英] How-to extract text from a pdf doc within a specific rectangular region?

问题描述

我有一个特定的矩形区域内提取一个pdf文档的文本。的工作流程如下。首先PDF格式转换为JPG图片。然后用户借鉴，画面顶部选择矩形。然后，我莫名其妙地需要提取pdf文档的选择区域中的所有文本。从C＃访问什么免费的PDF库有什么建议使用？

I have to extract text from a pdf doc within a specific rectangular region. The work-flow is as following. First of all pdf is converted to an jpg image. Then user draws selection rectangle on top of the picture. Then I somehow need to extract all text from pdf doc within that selection region. Any suggestions what freeware pdf libs accessible from C# to use?

推荐答案

我同意，OCR是不是在这里使用的方法。你需要一个PDF库，可以提取与边框坐标沿着文本。

I agree, OCR is not the approach to use here. You need a PDF library that can extract the text along with the bounding box coordinates.

QuickPDF是商业库（www.quickpdf.com），可以提取所需信息为$ 249非常合理的价格。 http://www.quickpdflibrary.com/help/quickpdf/DAExtractPageText.php 是您正在寻找的功能。这将提取整个页面的文本，那么你就需要使用简单的点和/或矩形的功能限制文字到您选择的矩形。

QuickPDF is a commercial library (www.quickpdf.com) that can extract the required information for a very reasonable price of $249. http://www.quickpdflibrary.com/help/quickpdf/DAExtractPageText.php is the function you are looking for. This will extract the text for the whole page and then you would need to use simple Point and/or Rectangle functions to limit the text to your selected rectangle.

我不不敢相信的iText具有基于我的研究这种能力。

I don't believe iText has this capability based on my research.

您也应该阅读的为PDF文本提取

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