Adobe 22101156 - Acrobat Capture - PC User manual

50
Online Guide
• Commands
• Using the Capture plug-in
• Capturing documents
• Correcting captured documents
• Setting Capture plug-in
preferences
• Troubleshooting
Adobe
®
Acrobat
®
Capture Plug-In

51
Commands
Capturing docu-
Setting Capture
Correcting captured docu-
To review and correct sus-
File
Capture...Preferences
Document
Capture Pages...
Edit
Show Capture Suspects
Find First Suspect

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Using the Capture plug-in
You use the Capture plug-in when you choose the
Capture Pages command in Acrobat Exchange. The
plug-in uses optical character recognition (OCR) to
convert bitmap text to text that can be corrected,
indexed, searched, or copied to other files. The text
it converts is in PDF image documents that were
scanned directly, or imported, into Acrobat. For
information about these PDF documents, and about
the kinds of PDF documents produced by capturing
text from them, see
About PDF document styles
.
You can configure the Capture plug-in to recognize
any of eight languages, hide recognized text behind
a document image, and downsample images to
minimize file size. For more information, see
Setting Capture plug-in preferences
.
After you capture a document, you can use the
touch-up tool in Exchange to review and correct
text. See Correcting captured documents for
details.

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The Capture plug-in is installed from the Acrobat
3.0 CD-ROM. For details on running the Acrobat
Installer, see the
Acrobat Getting Started Guide
.
Use the Capture plug-in to convert small collections
of paper documents and electronic images to PDF
directly from Acrobat Exchange. If you need to con-
vert large collections of paper documents or elec-
tronic images to PDF, consider upgrading to the full
Acrobat Capture product, which offers a number of
automated processing features and enhanced
reviewing capabilities.

54
About PDF document styles
Adobe Acrobat can produce three styles of PDF
documents:
•
PDF Image Only documents contain only a bitmap
picture of the original document. PDF Image Only files
are produced by the Scan and the Import commands in
Exchange. If you need to convert and view image files
quickly, PDF Image Only is sufficient.
•
PDF Normal documents contain electronic text that
is scalable and can be indexed, searched, and copied.
Page formatting and graphical images are preserved.
You can create this kind of file with Acrobat Distiller, PDF
Writer, or the Capture Pages command in Exchange. PDF
Normal files are significantly smaller than their PDF
Image Only counterparts, making them ideal for online
distribution.

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•
PDF Original Image with Hidden Text documents
combine features of PDF Image Only and PDF Normal
documents. They contain a complete bitmap picture of
the original document, but with recognized text hidden
behind the picture. This provides the advantages of
searchable text while ensuring that a document is iden-
tical in appearance to the original. Use this kind of PDF
file when you are required to keep the original scanned
image of a document for legal or archival purposes. PDF
Original Image with Hidden Text files can be created
only with the Capture Pages command in Exchange.
When you capture a PDF Image Only file, it usually
reduces file size significantly. In most cases, PDF
files captured with the PDF Normal setting are
smaller than those captured with the PDF Original
Image with Hidden Text setting. For details, see
Comparing PDF file sizes
.

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Capturing documents
The documents you capture are image files that
you have scanned or imported into Exchange—
PDF Image Only
files.
To capture a document:
1 Using Exchange, do one of the following:
•
To import an image file, choose File > Import > Image.
Select the file you want to import and click Open. See
Acrobat Exchange
for more information on importing
image files.
•
To scan a paper document, choose File > Scan.
Choose a scanner device and document type; then click
Scan. See
Acrobat Scan
for information on using a
scanner with Acrobat Exchange.
2 Choose Document > Capture Pages.
3 Determine which pages you want to capture by
selecting All Pages, Current Page, or Specified Range
and entering the page numbers in the text box.

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4 If you want to change the Capture preferences,
click Preferences. The document will be captured
with the new settings. See
Setting Capture plug-in
preferences
for details.
5 Click OK. The Capture progress window shows the
page, character, and word recognition process. In order
for the process to be successful, the resolution of the
captured PDF Image Only file must fall within the follow-
ing ranges:
•
Monochrome images, 200–600 dpi
•
Grayscale or color images, 200–400 dpi
Also, the text should be dark against a light back-
ground. Text on a dark or shaded background, or on
a page with complex color gradients, may not be
recognized.

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Correcting captured documents
When the Capture plug-in suspects it has not recog-
nized a word correctly, it displays the bitmap image
of the original word in the document and hides its
best guess for the word behind the bitmap. This
ensures accurate reproduction of the original, even
without correction.
You can review and correct
suspect
words in
Exchange with the touch-up tool. This is useful
when you want your document to be fully search-
able, for example, when indexing it for publication
on CD-ROM or the World Wide Web.
Note: The Capture plug-in uses the current PDF
Writer settings for font embedding and subsetting
when it creates PDF files. To avoid problems when
correcting a captured document, be sure that font
subsetting is not selected in PDF Writer before
capturing the document. See PDF Writer for more
information.

10
To view all the suspect words in a document:
Choose Edit > Show Capture Suspects. Each of the
suspect words in the document is highlighted.
To review and correct suspect words:
1 Choose Edit > Find First Suspect. The suspect text is
highlighted, and its bitmap image appears in the
Suspect Image window.
2 Choose from one of the following:
•
To accept the highlighted suspect text as correct,
click Accept (TAB). The bitmap image is discarded.
•
To leave the bitmap image in place, click Next
(Shift+TAB).
•
To edit the highlighted suspect text, type the correct
text; then click Accept (TAB). The text is changed, and
the bitmap image is discarded.
See
Acrobat Exchange
for more information on
using the touch-up tool.