Adobe Acrobat XI User Manual download pdf (Page 140)

133

Creating PDFs

Last updated 1/14/2015

4 In the Recognize Text - General Settings dialog box, specify the options, and then click OK.

Recognize Text - General Settings dialog box

Primary OCR Language Specifies the language for the OCR engine to use to identify the characters.

PDF Output Style Determines the type of PDF to produce. All options require an input resolution of 72 dpi or higher

(recommended). All formats apply OCR and font and page recognition to the text images and convert them to normal

text.

Searchable Image Ensures that text is searchable and selectable. This option keeps the original image, deskews it as

needed, and places an invisible text layer over it. The selection for Downsample Images in this same dialog box

determines whether the image is downsampled and to what extent.

Searchable Image (Exact) Ensures that text is searchable and selectable. This option keeps the original image and places

an invisible text layer over it. Recommended for cases requiring maximum fidelity to the original image.

ClearScan Synthesizes a new Type 3 font that closely approximates the original, and preserves the page background

using a low-resolution copy.

Downsample To Decreases the number of pixels in color, grayscale, and monochrome images after OCR is complete.

Choose the degree of downsampling to apply. Higher-numbered options do less downsampling, producing higher-

resolution PDFs.

Correct OCR text in PDFs

When you run OCR on a scanned output, Acrobat analyzes bitmaps of text and substitutes words and characters for

those bitmap areas. If the ideal substitution is uncertain, Acrobat marks the word as suspect. Suspects appear in the

PDF as the original bitmap of the word, but the text is included on an invisible layer behind the bitmap of the word.

This method makes the word searchable even though it is displayed as a bitmap.

Note: If you try to select text in a scanned PDF that does not have OCR applied, or try to perform a Read Out Loud

operation on an image file, Acrobat asks if you want to run OCR. If you click OK, the Text Recognition dialog box opens

and you can select options, which are described in detail under the previous topic.

1 Do one of the following:

• Choose Tools > Text Recognition > Find All Suspects. All suspect words on the page are enclosed in boxes. Click

any suspect word to show the suspect text in theFind Element dialog box.

• Cho ose Tools > Text Recogn ition > Find First Suspe ct.

Note: If you close the Find Element window before correcting all suspect words, you can return to the process by

choosing Tools > Text Recognition > Find First Suspect, or by clicking any suspect word with the Edit Document

Tex t to ol.

2 In the Find option, choose OCR Suspects.

3 Compare the word in the Suspect text box with the actual word in the scanned document. To correct an OCR

suspect, click the highlighted object in the document and type in the new text. If the suspect was incorrectly

identified as text, click the Not Text button.

4 Review and correct the remaining suspect words, and then close the Find Element dialog box.

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Adobe Acrobat XI User Manual Page 140