618553

Adobe ACROBAT X STANDARD Manual

51
Zoom out
Zoom in
Previous page
1/352
Next page
46
USING ACROBAT X STANDARD
Creating PDFs
Last updated 10/11/2011
• To apply lossless compression to a scanned image, select one of these options under the Optimization Options in
the Optimize Scanned PDF dialog box: CCITT Group 4 for monochrome images, or Lossless for color or grayscale
images. If this image is appended to a PDF document, and the file is saved by Save, the scanned image remains
uncompressed. If the PDF document is saved using Save As, the scanned image may be compressed.
• For most pages, black-and-white scanning at 300 dpi produces text best suited for conversion. At 150 dpi, OCR
accuracy is slightly lower, and more font-recognition errors occur; at 400 dpi and higher resolution, processing
slows and compressed pages are bigger. If a page has many unrecognized words or very small text (9 points or
smaller), try scanning at higher resolution. Scan in black and white whenever possible.
• When Recognize Text Using OCR is disabled, full 10-to-3000 dpi resolution range may be used, but the
recommended resolution is 72 and higher dpi. For Adaptive compression, 300 dpi is recommended for grayscale
or RGB input, or 600 dpi for black-and-white input.
• Pages scanned in 24-bit color, 300 dpi, at 8-1/2–by-11 in. (21.59-by-27.94 cm) result in large images (25 MB) before
compression. Your system may require 50 MB of virtual memory or more to scan the image. At 600 dpi, both
scanning and processing typically are about four times slower than at 300 dpi.
• Avoid dithering or halftone scanner settings. These settings can improve the appearance of photographs, but they
make it difficult to recognize text.
• For text printed on colored paper, try increasing the brightness and contrast by about 10%. If your scanner has
color-filtering capability, consider using a filter or lamp that drops out the background color. Or if the text isn’t
crisp or drops out, try adjusting scanner contrast and brightness to clarify the scan.
• If your scanner has a manual brightness control, adjust it so that characters are clean and well formed. If characters
are touching, use a higher (brighter) setting. If characters are separated, use a lower (darker) setting.
Recognize text in scanned documents
You can use Acrobat to recognize text in previously scanned documents that have already been converted to PDF.
Optical character recognition (OCR) software enables you to search, correct, and copy the text in a scanned PDF. To
apply OCR to a PDF, the original scanner resolution must have been set at 72 dpi or higher.
For more information on text recognition, see these videos:
• Recognizing Text in Scanned PDF Documents: www.adobe.com/go/lrvid_025_acrx_en
• How to Edit a Scanned PDF: www.adobe.com/go/learn_acr_edit_scans_en
Note: Scanning at 300 dpi produces the best text for conversion. At 150 dpi, OCR accuracy is slightly lower.
More Help topics
“Adding unifying page elements” on page 91
Converting Scanned PDF Files to Other File Formats
Recognize text in a single document
1 Open the scanned PDF.
2 Choose Tools > Recognize Text > In This File.
3 In the Recognize Text dialog box, select an option under Pages.
4 Optionally, click Edit to open the Recognize Text - General Settings dialog box, and specify the options as needed.
… 51 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Adobe ACROBAT X STANDARD at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Adobe ACROBAT X STANDARD in the language / languages: English as an attachment in your email.

The manual is 18,07 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info