It has been almost impossible to scan a binding document without distortion and uniform illumination. In the famous technology town 'Tübingen' in the German city of Stuttgart, a scanner expert "number" and in ' In cooperation with Magdeburg's 'Electronics, Signal Processing and Communication Technology Institute', this issue is now over. An innovative soft and hard technology called 'Perfect Book' has been able to perfectly flatten the seams and correct distortions in the book. This technology has now been applied to the new "Number of Races" OS12000 series scanners.

Digital archiving of bound literature is becoming increasingly important in libraries and museums. In the past, it was almost impossible to unfold a book, especially a thick book, because the spine made the page curved, and it was almost impossible to bend or deform the image at all. Due to the deformation caused by the surface curvature, the information is made to produce a higher error rate in optical character recognition.

The "number of games" and the "Electronics, Signal Processing and Communication Technology Institute" in the "Otto von Guericke University" in Magdeburg are the basic issues, and the two sides have proposed solutions for the joint development of their hardware and software.

For a long time in the field of scanner technology, the method of correcting the distortion of books and documents is not only to infer the distribution of light on the page or the actual surface contour or to correct the edge of the page. Completely solved with precise mathematical operations and software, using the "straight" and "smooth" methods to correct the distorted lines and text.

Match number file scanner "perfectbook" perfect file scanning functionMatch number file scanner "perfectbook" perfect file scanning function

The "Orthoscan" of the "Number of Companies" is also the use of this technology, which is a very effective tool for eliminating the spine of the spine, but it often has its limitations in practice. If the outline of the book is inserted into the note or the page is incomplete or the edge is broken, it is difficult to flatten or even flatten.

Early insertion of note or page damage affects the quality and accuracy of flattening

Note: Only when the upper and lower contour lines of the book can be fully confirmed, software and mathematical operations can be accurately corrected and flattened.

1 plus 1 becomes 3 = 3D

“Perfect Book” is a combination of hardware and software, using the “Number of Races” 12000 Series Scanner and “Number of Races” scanning software. The "Perfect Book" is based on a stereo vision system that captures the 3D outline of the page during the scan. In addition to the commonly used high-resolution line scan heads (yellow part of the picture), capturing 3D data requires an additional standard USB digital camera with VGA resolution (640 x 480 pixels), which acts as a surface or area array model digital Camera (green part of the illustration).

Two imaging systems simultaneously capture images without time-consuming pre-sweeping to achieve 3D (3-dimensional) structure

Match number file scanner "perfectbook" perfect file scanning functionMatch number file scanner "perfectbook" perfect file scanning function

The image from the line scan is from the image of the area array

Scanning with a line array produces an image in a reproducible form. A strip of light moves synchronously with the line scan at a reproducible speed, illuminating the original during scanning. The image illuminated by the moving light strip is sequentially recorded by a fixed area array model digital camera at a predetermined frame rate. Using special mathematical calculations, the image frequency captured from the area array can reconstruct the contour of the scanned page and transition to a plane in the second phase.

High-quality corrections can be achieved by using two calibrated imaging systems simultaneously from different angles. The “Perfect Book” successfully overcomes the errors and effects of pure mathematical methods in blurring or book edge breakage. A combination of line scan and area array capture produces a virtual 3D model of the book surface on the scanning platform, and calculates the contour of the 3D surface from the established coordinate system as the calibration of the entire system.

Because of the use of true 3D data, the "Perfect Book" no longer has to rely on margins to determine position and format. The recognition of the page is based on the height of the book's right page, the left page, and the two pages. When the height data is not equal, the structural analysis is automatically added to determine the margin. Therefore, the book can be opened naturally, and the operation is not only easier, but also saves time and protects the book. The “Perfect Book” is able to separate the two pages of the book very accurately and ensure the best print quality and results when printing is required.

“Perfect Book” automatically corrects the distortion and automatic recognition of the page that appears in the book.

Match number file scanner "perfectbook" perfect file scanning function

Orthoscan effect Perfect Book effect

As a result, the characters deformed near the slit in the book are directly aligned correctly in a straight line during scanning, and the pages are automatically and correctly separated from each other. The software makes the characters that are deformed near the seam of the book flat and flat, more even between words and words, eliminating the shadow of the middle seam. Even if the characters are hidden in the book, they can be captured clearly.

In addition to the benefits of high-quality printing, the 'Perfect Book' feature removes shadows from the seams and edges of the book, resulting in significant toner savings when printed. What is more valuable to users is that when converting scanned text from image to text format, the error rate of OCR recognition is significantly reduced, which improves work efficiency.

In the past, "number of games" has been a successful revolution in the concept of lighting (exposure), and now the patented 'LED' lighting technology provides better optical focus scanning, resulting in higher processing speed and Provides less than 1 lux hours of exposure to operators and scanned objects.

Thanks to light focusing and energy efficiency, clearer, interference-free, true-color images are available. Prevent the occurrence of shadows and the interference of reflected light, so as far as possible to ensure that the illumination area is facing the book seam, just for the problematic document, not to mention the "Perfect Book" area model camera does not require additional light source.

The number of file scanners provides the perfect "perfectbook" scanning function for the procuratorate.

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