After we receive the PDF file containing the pictures taken by the mobile phone, there may be meeting minutes, scanned documents or text data pictures in it. They usually have problems such as blur, insufficient light, unclear outline, etc. They cannot clearly see the key information content, which greatly affects the reading experience and the professionalism of the document. When facing dozens or even hundreds of pages of such PDF documents, it takes time to manually enhance the processing page by page, but the times are advancing with the times, and there are many tools and methods to deal with this problem, so as to uniformly improve the clarity of these pictures in PDF and make fuzzy pictures bright!
Today to teach you the three most simple optimization methods, without any complex content, to ensure that a few steps can be solved! Whether it is to optimize the product photos or to print the text of the pictures in the clear PDF, you can operate after reading it! Come and try it with me!
When will the text and pictures in the PDF become clear and will not appear blurred?
Scanned files are grayed out and can't be seen clearly
many pictures in PDF are taken by scanners or mobile phones, because a series of problems such as uneven distribution of light and old paper lead to gray background and blurred text in the pictures. During preview, it is always found that the more enlarged the text pictures, the harder it is to see clearly. Here we can make PDF documents clean and clear by making the text pictures in PDF clear and removing the gray background color at the same time, more convenient to read print.
Increase professionalism when printing or displaying
if you want to send PDF to customers, display or print data, there will be gray background color and text edge paste, which will make the whole document look unprofessional, enhance the clarity and remove the gray background, which can make the text darker and cleaner, the picture brighter, the background cleaner, and look like the meaning of the official document.
PDF old file recovery easy preview
some PDFs come from old files, photocopies or documents taken on the spot. Such documents are often blurred and gray, which is very eye-consuming to read. By making the words and pictures clear and removing the gray bottom, the unclear old documents can be turned into more readable versions, and important information will not be invisible because the background color is too heavy.
Preview the effect of removing gray color from PDF text and pictures in batch
before treatment:
after treatment:
method 1: Use HeSoft Doc Batch Tool Sharpening PDF pictures
recommended Index:★★★★★
Advantages:
- can batch process hundreds, thousands of PDF files, and friendly interface, simple operation, small white can also be fast processing.
- Files are processed locally, without the nature of the uploaded files, protecting the user's security and privacy.
Disadvantages:
- only software can be installed to operate in a computer.
Operation steps:
1. Open 【 HeSoft Doc Batch Tool ], select [PDF tool]-[text on PDF picture becomes clear]].
2. Select a method in [Add File] or [Import File from Folder] to add PDF with gray bottom removed. It also supports dragging files below, and then click Next.
3. Enter the setting option interface, open the [Text Clarity] key, and drag the slider below to adjust. If the text in the picture is still white and blurred, you can open the [Sharpening Degree] key and pull the slider to the maximum. Finally, click Next, click Browse and select the location to save the new file.
4. After waiting for the processing to end, click the red path to open the folder, and then open the PDF to view the clear picture.
Method 2: Enhance PDF Scans with Adobe Acrobat DC
recommended Index:★★★☆ ☆
advantages:
- professional tool effect is acceptable, automatic correction of skew.
- Batch processing is possible.
Disadvantages:
- Adobe Acrobat DC is required for professional use.
- The price of the software is low and very expensive.
Operation steps:
1. Open the PDF with Adobe Acrobat DC and click Tools-Enhance Scan.
2. Select the optimized scan.
3. Adjust the clarity and contrast sliders, and finally click Enhance Optimization.
Method 3: Use online tools to enhance and optimize PDF
recommended Index:★★★☆ ☆
advantages:
- no need to install software can be used.
- The mobile phone can also be operated, and the free version is enough.
Disadvantages:
- need to upload files to the website server, there may be a risk of disclosure of privacy.
- The use of complex effects is limited.
Operation steps:
1. Open AVEPDF and select ORC PDF in PDF Optimization.
2. Upload the PDF with pictures to be ash-removed, and save it after the processing is completed.
