PDF Questions

There are many variables that control the speed of different attributes of the DocuLex software. We have included a few hints below to help you get the most from your software.

Scanning:
Different scanners have different rated scan speed. Many scanner manufacturers quote rated speed of a production scanner by scanning low-DPI (200 DPI, for instance) images in binary (pure black & white) format. Scanning at a higher DPI will tend to reduce the number of pages per minute (ppm) that a scanner is capable of. Also keep in mind that scanner manufacturers often quote both pages per minute (ppm) and images per minute (ipm) with duplex scanners. A duplex scanner capable of 50 ppm is often capable of scanning 100 images per minute, but only if both sides of the page are being imaged. The rated speeds of most production scanners are available on the web site of the scanner’s manufacturer.

Printing:
As with scanners, different printers have different rated speeds that are usually quoted at printing at a low resolution. DocuLex recommends printing at the same DPI of the images that are being printed through our software. For instance, if images have been scanned at 300 dpi, they should be printed at 300 dpi to achieve the highest print speed possible. Some print drivers do not allow the DPI setting to be changed, though many PCL drivers are interchangeable from one printer manufacturer to another, which allows the user to print to a printer from a driver that will allow such a setting.

OCR:
Many factors such as processor speed and RAM will affect the speed of the OCR process. On today’s ‘average’ machine, DocuLex software will OCR between 400-800 pages an hour (8.5×11 images, 300 dpi, average letter text). Our OCR engine is optimized for 300 dpi images, images at a lower or higher resolution may affect OCR speed and/or quality.

PDF:
The PDF process includes the OCR process mentioned above when OCR data is being included in the PDF file. PDF images with included OCR will achieve approximately the same pages per hour as mentioned above. PDF files created without OCR will be created on the average of 4000 images an hour.

Endorsing:
The DocuLex endorsement process creates a small border below the bottom edge of the image and places the endorsement into this border. The endorsement process will create around 4000 endorsed images per hour.

DocuLex software is not designed to edit existing PDF files. If it is necessary to import existing PDF files into DocuLex software, it is possible to export group 4 tiff images from PDF files with the full version of the Adobe Acrobat software, and many other tools available on the web.

PDFZone.com is a good resouce for individuals who wish to work with existing PDF files.

In some instances, while a PDF files is being created by DocuLex software, a temporary file is created while the PDF file is being created. If something goes wrong during the process, such as an OCR crash, the PDF file may be created without having the proper file name. Generally the filename is a string of numbers and letters without an extension.

It is possible to minimize the occurence of this error by not closing the DocuLex PDF product while it is creating PDF files, and not PDFing across a slow network connection.

DocuLex software does not embed thumbnails in PDF files. You can embed thumbnails in your PDF files by batch processing them in Adobe Acrobat. Other software packages are also available online that can batch process PDF files to embed thumbnails.