Zones and background values on a page image determine how
page elements should be processed (treated as text, tables or graphics),
and which part of a page should be auto-zoned.
Zones define areas enclosed by borders drawn over a page
image which has a background value: process or ignore. There are text,
table, graphic and also process and ignore zones.
If you draw zones manually you can decide which type to draw.
You draw text zones with 
, vertical left-rotated
text zones with 
, vertical
right-rotated text zones with 
, vertical Asian text zones with 
, table zones with 
and graphic zones
with 
from the Image toolbar.
Image parts with manually drawn text, table or graphic zones
will never be auto-zoned.
|
|
In OmniPage Professional, select  to draw form
zones to define areas where form elements should be detected using LFR
technology. Auto-zoning will not detect forms. |
With process and ignore zones and backgrounds you can determine
which image parts will be auto-zoned.
Process areas (process
zones or process backgrounds) are auto-zoned when they are sent to recognition.
They will be replaced by one or more text, table or graphic zones during
recognition.
Ignore areas (ignore
zones or ignore backgrounds) are dropped from processing. No text is recognized
and no image is transferred.
Let’s see how auto-zoning works:
Auto-zoning allows the program to detect blocks of text,
headings, tables, pictures and other elements on a page and draw zones
to enclose them. It assigns text, table and graphic zone types to all
zones and alphanumeric or numeric zone contents to text and table zones.
Auto-zoning runs on whole pages when you do automatic processing
(unless you have a template loaded). Your layout
description influences the auto-zoning process.
You can also specify auto-zoning when doing manual processing,
as follows:
auto-zone a whole page. The page
must not contain any zones.
auto-zone a part of a page. The
page part should be enclosed in a process zone.
auto-zone a page background.
The page background should be set as a process background.
To auto-zone a whole page
Acquire a page. It appears with
a process background.
Check in the Layout Description
drop-down list that a zone template is not loaded.
Click the Perform OCR button.
After recognition the page will return with zones round all
elements found on the page and with the background changed to ignore.
Images sent to recognition without zones will always be auto-zoned.
To auto-zone a part of a page
Acquire a page. It appears with
a process background.
Draw a zone. The background changes
to ignore after the first zone is drawn manually.
Draw text, table or graphic zones
on the ignore background to enclose areas you want manually zoned.
Draw process zones on the ignore
background to enclose areas you want auto-zoned.
Click the Perform OCR button.
After recognition, the process zones will be replaced with
one or more text, table or graphic zones.
Automatically drawn zones have solid borders, manually drawn
zones have dotted borders.
To auto-zone a page background
Acquire a page and draw zones
manually as described above in steps 1-3.
Click the Process background
tool 
in the Image toolbar to set a process background.
After recognition, the page will return with automatically
generated text, table or graphic zones round all elements found on the
process background outside the manually drawn zones. The returned page
has an ignore background after processing.
You can draw ignore zones with the Draw ignore zone tool
on a process background over parts of the page you want
to exclude from recognition.
Auto-zoning and vertical texts
Auto-zoning is recommended for Asian
language recognition, it can automatically detect text direction. However,
manual zoning is possible.
Auto-zoning can also in many cases detect vertical texts
in non-Asian languages. See Auto-zoning
for vertical texts. Vertical texts in table cells can only be detected
automatically. Vertical texts in other cases can be zoned
manually.
