In daily work, many customers will use their mobile phones to take pictures of paper documents into PDF documents and send them to us. However, the scanned version of the PDF background is gray, the text content is blurred, very affect the reading, printing and recognition effect. Here's a trick to teach you, you can completely remove the gray background of the PDF scan, the background color white, so that the text content becomes clearer, improve the print effect.
The PDF scan of the gray background into a pure white background of the use of the scene
1. Many scanned paper documents have gray background, yellow background or shadow, which will lead to unclear text content, especially when viewed on a large screen. Therefore, we need to turn the background of the PDF scan into pure white and deepen the text color to make the content clear and readable.
2. We received the scanned PDF from the customer. When we need to print and archive, the gray background greatly affects the printing effect. The printed paper document has dirty background and unclear text. Turning PDF scans into black on a white background can improve the printing effect and make the printed documents cleaner and more professional.
3. If we want to do OCR text recognition on PDF scanned documents, gray background or shadow will seriously interfere with OCR, resulting in failure to recognize or many errors, so we have to spend a lot of time to adjust and modify. After the gray bottom of the scan is removed, the clarity and contrast of the text can be improved, making OCR recognition easier.
PDF scan to remove gray background clear after the effect preview
before treatment:
after treatment:
Batch removal of scanned PDF gray background color white operation steps
1, open. HeSoft Doc Batch Tool , select PDF tool → The text on the PDF picture becomes clear.
2. Click to add files or import files from folders, and add all PDF files that need to be processed here.
3. You can freely drag the slide rail to adjust the text clarity. Here we set the text clarity to 45%. At the same time, you can adjust the brightness, contrast and sharpening degree to make the text on the PDF picture clearer. Everyone can set it freely according to their actual situation.
4. After the processing is completed, directly click the save location to view the processed PDF file. All the scanned documents have removed the gray background and the background color has become pure white, which is more convenient to read and print.
