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可搜索的 PDF

将扫描的 PDF 转换为可搜索的 PDF

提供以下未下载的结果:

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A searchable PDF file, also known as an OCR (Optical Character Recognition) PDF, is a digital document that contains both scanned images of the pages of the original document and the recognized text obtained from those scans. This recognition process allows you to search and highlight text in a PDF file just as you would in a regular text document.

Here's how it usually works:

Scanning: First, the PDF document is scanned into a digital image format. This scanned image is essentially a document page image.

Optical Character Recognition (OCR): Next, OCR software is used to analyze the scanned images and recognize any text characters that appear in them. This software identifies individual characters or words and converts them into machine-readable text.

Adding a text layer: The recognized text is then added as a hidden text layer to the PDF document. This text layer remains invisible to the viewer, but is accessible to search engines and text selection tools.

Combining text and images: OCR-processed text is combined with original scanned images to create a searchable PDF file that contains both a visual representation of the document and the underlying textual data.

Advantages of searchable PDF files: searchability, accessibility for people with visual impairments,

text indexing by search engines and others.

data extraction: Companies can extract structured data from documents such as invoices or forms to automate data entry processes.

It is important to note that OCR quality and text recognition accuracy may vary depending on factors such as the quality of the original document, the OCR software used, and the language of the text. Advanced OCR software can handle multiple languages and improve accuracy using machine learning techniques, making searchable PDFs a valuable tool for document management and information retrieval.

Note if your pages are rotated, we recommend that you rotate them to the correct orientation for better text recognition. You can do this using our PDF page rotator.

Welcome to our web-based application for converting scanned PDFs to searchable! Whether you're using a computer or a mobile device, our convenient platform provides searchable PDF conversion across all operating systems.

Our free web software with no registration and no code verification supports text recognition in up to 32 languages.

Imagine the efficiency of converting up to 10 files in one pass! We understand the importance of resource management, which is why our web application has an overall file size limit of 32 MB per pass. This ensures that you can convert large amounts of data while maintaining optimal performance. Converting large searchable PDFs can take several hours, so we've included a progress bar to let you know how long you'll have to wait for the conversion to complete.

Although your files are stored on our server for 24 hours, we value your privacy, so we allow you to delete files immediately after processing.

Experience the convenience of our application, which is available for free and is available on any desktop or mobile operating system.

You can also recognize text in raster images using our OCR text recognizer.

它是如何运作的

1

选择文件

您可以从文件系统、Dropbox 和 Google 云端硬盘中选择文件。

2

按下按钮 “变换”

以便上传文件进行处理。

3

等待完成

这将需要 10 秒到几分钟,具体取决于文件的数量和大小。

FAQ

什么是可搜索的 PDF?

可搜索的 PDF,也称为 OCR(光学字符识别)PDF,是一种同时包含扫描图像和机器可读文本的文档。这使用户可以在文档中搜索和选择文本、复制文本,以及执行基于文本的功能。因此,PDF 的内容变得可搜索和编辑。

可搜索的 PDF 是如何创建的?

可搜索的 PDF 是通过光学字符识别 (OCR) 技术创建的。OCR 软件扫描文档中的文本,识别字符,然后将这些文本与扫描的图像一起隐身嵌入到 PDF 文件中。这个隐藏的文本图层用于搜索和选择文本。

我能否在可搜索的 PDF 中搜索特定的单词或短语?

是的,可搜索 PDF 的主要优势之一是能够搜索特定的单词或短语。您可以使用我们的 工具 进行单词搜索。

可搜索的 PDF 有什么限制吗?

虽然可搜索的 PDF 非常有用,但它们确实有一些局限性: OCR 准确性:OCR 结果的质量可能因软件和扫描文档的质量而异。 文件大小:由于嵌入了文本,与不可搜索的 PDF 相比,可搜索的 PDF 文件大小通常更大。 格式:OCR 可能无法精确保留复杂的格式、字体或布局。