What is the best way to scan books quickly and generate PDFs with a mobile app?

What is the best way to scan books quickly and generate PDFs with a mobile app?

A friend sent a private message a few days ago:

Could you please scan 200 pages of a book for free so I can make a PDF document?

I'm quite proud to say yes. The [Scan] function is absolutely free, and the [Generate PDF] function is free every day. Even if you run out today, you can automatically refresh the number the next day.

Due to the complexity of the algorithms used to scan books, the scanning process will be more complex than a single scan. merge 2 jpg files into 1 pdf Therefore, everyone has prepared this article to show how to quickly scan books with mobile phones.

The first step is to open the Scan-Scan-Surface book.

Click the button to take a photo of the left and right outlines of the system page.

The software will automatically create four edges up and down the page - you can adjust them by clicking on them

The next page can be scanned now!

As needed, generate pdf files or perform text recognition.

Recognizing characters

Create a PDF file

In spite of the App's ability to do most of the work for us, there are a few things we need to keep in mind. Pay attention to these points, and you will be able to sweep the book quickly and efficiently.

There is a moderate distance between the mobile phone webcam and the scanner when scanning technical documents.

Here are two examples of errors: first, the camera was too far away from the book to identify which page was being scanned. Second, the camera was too close and the edge of the book was not visible on the image.

The camera is too close to the book on the left. Horrified: the camera is too close to the book on the right.

The scanned file should be contrasted with the background color.

If the colors are too close, the outline recognition will not work, and the software will identify the outline based on its color difference. In the image below, Agee uses a very exaggerated state to illustrate the possibility that the software might default to the range of white paper as the outline of the scanned document.

Additionally, when the background is a stripe pattern with little color difference from the scanning technical file, the same situation may also occur.

Don't put anything in the scan area.

In addition to the contrast between the scanning document and the background color, you also need to keep the scanning interface free of other debris. As an example, Aji exaggerated the problem. Are you scanning a book, a headphone case or a piece of A4 paper?

When you master the above operation skills and pay attention to three tips, you'll be able to quickly scan good books with your phone!