Difference between revisions of "Create an Accessible PDF"

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= Using PDFs from Other Sources: =
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__NOTOC__
  
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There may not be a lot you can do if you are using a PDF from another source (such as journal articles and scanned photocopies) but there are a few elements you should look for when selecting PDFs to assign.<br>
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<div class="container-fluid">
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<div class="row">
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<div class="col-md-8">
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<div class="lead">
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It is important that PDFs being used for instruction feature '''Optical Character Recognition''' (OCR) to utilize inclusive design and make materials accessible to as many users as possible.
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</div>
  
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*Clear, readable text. Text can be made inaccessible if it is warped, in an unusual font (such as Curlz or Handwriting), or is covered by handwriting/drawing. Students may be using software that uses OCR in order to convert text to audio, if the characters aren't clear, the audio will be convoluted.<br>
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'''The Library can assist in creating accessible PDFs (Portable Document Format) for use with Canvas and WordPress sites. To request assistance, visit the circulation desk and fill out a request form.'''
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*Large font. Some individuals can read large type if there is a high contrast (Black font n a white background or vice versa).<br>
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*Page numbers. Page numbers, particularly at the top of pages, help students navigate where they are in the text.<br>
+
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*Straightforward structure. Many screen readers scan text from left to right, top to bottom. PDFs which include minimal break-out text boxes, tables, wrap around text, etc. are generally accessible to students.<br>
+
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*Few images and alternative content. It goes without saying that students with visual impairments may not be able to access an image but this applies to other content as well: graphs, tables, diagrams, etc. Captions and descriptions for visual-based content can help students walk away with the information they may have missed otherwise.<br>
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= Making Your Own PDFs: =
 
  
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=== How to Create Accessible PDF Docs ===
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At Evergreen, we distribute a lot of instructional material in the form of PDFs (Portable Document Format).
 +
*When selecting or creating a PDF for use as course material, make sure the PDF features OCR (Optical Character Recognition).
 +
*Optical Character Recognition is "the mechanical or electronic conversion of scanned images of handwritten, typewritten or printed text into machine-encoded text."
 +
*OCR is a simple preset that must be selected within Acrobat Pro before starting your scans. Read about OCR and recommended scanning presets below.
  
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At Evergreen, we distribute a lot of instructional material in the form PDF documents. It is important that all PDFs created for use on campus feature Optical Character Recognition (OCR) so that students with different learning abilities can access them. Optical Character Recognition "is the mechanical or electronic conversion of scanned images of handwritten, typewritten or printed text into machine-encoded text." OCR is a simple preset that must be selected before starting your scans within Acrobat Pro. Read about OCR and recommended scanning presets below.
+
== Using PDFs from Other Sources ==
  
−
This process assumes that you are using Adobe Acrobat Pro, version 9 or higher on either a Windows or Macintosh computer.
+
There may not be a lot you can do if you are using a PDF from another source (such as journal articles or scanned photocopies) but there are a few elements you should look for when selecting PDFs to assign.<br>
  
−
===Scanning Process===
+
*'''Use Original Documents Only.''' You cannot create accessible PDFs from printed copies because they are not high enough resolution. OCR will usually fail. Use only original textbooks to scan from or an existing 300 DPI or higher PDF file.
−
*Turn on your scanner.
+
*'''Clear, readable text.''' Text may be inaccessible if it is warped, in an unusual font (such as Curlz or Handwriting), or is covered by handwriting/drawing. Students may be using software that uses OCR (Optical Character Recognition) in order to convert text to audio, if the characters aren't clear, the audio will be convoluted.<br>
 +
*'''Large font.''' Some individuals can read large type if there is a high contrast (e.g. black font against a white background or vice versa).<br>
 +
*'''Page numbers.''' Page numbers, particularly located at the top of pages, help students navigate where they are in the text.<br>
 +
*'''Straightforward structure.''' Many screen readers scan text from left to right, top to bottom. PDFs which include minimal break-out text boxes, tables, wrap-around text, etc., are generally accessible to students.<br>
 +
*'''Few images and alternative content.''' Students with different visual needs may not be able to access an image and this applies to other content as well: graphs, tables, diagrams, etc. Captions and descriptions for visual-based content can provide students with information they might have missed otherwise.<br>
 +
 
 +
== How to Make Accessible PDF Docs ==
 +
 
 +
'''Please note:''' This process assumes that you are using Adobe Acrobat Pro, version 9 or higher, on either a Windows or Macintosh computer.
 +
 
 +
====Scanning Process====
 +
*Turn on scanner
 
*Place first page on scanner bed, aligned according to size and scanner layout
 
*Place first page on scanner bed, aligned according to size and scanner layout
 
*Start Adobe Acrobat Pro from the Start Menu or Launcher
 
*Start Adobe Acrobat Pro from the Start Menu or Launcher
 
*Navigate to File > Create PDF From Scanner. Select "Configure Presets."
 
*Navigate to File > Create PDF From Scanner. Select "Configure Presets."
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[[File:File:OCR1.png]]
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**On a Mac you are automatically prompted with the presets option screen below.
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*You may be prompted for your scanner type at this point. The scanner type is usally on the front of the scanner.<br> You’ll be prompted whether your Scan is Complete or if there are additional pages.  
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*Place the additional page on the scanner before choosing an option, because the scanner will immediately begin scanning.  
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*When you’re scanning is complete, select File-&gt; Save. Accessibility checking will not work correctly otherwise,<br> Select Advanced -&gt;Acccessibility-&gt; Full Check
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[[File:OCR1.png|200px]]
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*If there are accessibility problems, they will be reported in the left sidebar. They are accompanied by detailed step-by-step instructions for fixing each problem.
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*To be absolutely certain that the PDF document will be accessible for a specifc application, testing the PDF document with that application (typically JAWS or ZoomText) is recommended.
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* Ensure that Optical Character Recognition is selected.
 +
**DPI must be 300 or higher to ensure the character recognition process is successful.  
 +
 
 +
 
 +
[[File:OCR2.png|200px]]
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* If you select the "options" button next to the OCR checkbox, you are able to change the OCR type from "ImageScan" to "ClearScan."
 +
**ClearScan OCR will keep the file size low while maintaining quality.
 +
**Adobe has an excellent [http://blogs.adobe.com/acrolaw/2009/05/better_pdf_ocr_clearscan_is_smal/ writeup] about these options.
 +
 
 +
===Converting an existing PDF===
 +
*Open the PDF in Acrobat Pro
 +
*Select "Recognize Text In This File" from the right hand side bar
 +
*Click "Edit" on the pop up window to ensure you have the following settings
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*English US - ClearScan - 300DPI
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*Click OK
 +
*Save the file
 +
*Re-open the file
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*Go to File > Save As Optimized PDF. Ensure compatibility is set to Acrobat 10x on the right side
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*Save
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</div>
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<div class="col-md-1"></div>
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<div class="col-md-3 sidebar">
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{{AccessibilityResources}}
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{{CreatingAccessibleContent}}
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----
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{{GetHelp}}
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</div>
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</div>
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<!-- end container-->
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</div>
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<!-- Generator=Template:TwoColumn -->
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__NOTOC__
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__NOEDITSECTION__
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[[Category:Accessibility]]

Latest revision as of 15:19, 22 December 2023


It is important that PDFs being used for instruction feature Optical Character Recognition (OCR) to utilize inclusive design and make materials accessible to as many users as possible.

The Library can assist in creating accessible PDFs (Portable Document Format) for use with Canvas and WordPress sites. To request assistance, visit the circulation desk and fill out a request form.


At Evergreen, we distribute a lot of instructional material in the form of PDFs (Portable Document Format).

  • When selecting or creating a PDF for use as course material, make sure the PDF features OCR (Optical Character Recognition).
  • Optical Character Recognition is "the mechanical or electronic conversion of scanned images of handwritten, typewritten or printed text into machine-encoded text."
  • OCR is a simple preset that must be selected within Acrobat Pro before starting your scans. Read about OCR and recommended scanning presets below.

Using PDFs from Other Sources

There may not be a lot you can do if you are using a PDF from another source (such as journal articles or scanned photocopies) but there are a few elements you should look for when selecting PDFs to assign.

  • Use Original Documents Only. You cannot create accessible PDFs from printed copies because they are not high enough resolution. OCR will usually fail. Use only original textbooks to scan from or an existing 300 DPI or higher PDF file.
  • Clear, readable text. Text may be inaccessible if it is warped, in an unusual font (such as Curlz or Handwriting), or is covered by handwriting/drawing. Students may be using software that uses OCR (Optical Character Recognition) in order to convert text to audio, if the characters aren't clear, the audio will be convoluted.
  • Large font. Some individuals can read large type if there is a high contrast (e.g. black font against a white background or vice versa).
  • Page numbers. Page numbers, particularly located at the top of pages, help students navigate where they are in the text.
  • Straightforward structure. Many screen readers scan text from left to right, top to bottom. PDFs which include minimal break-out text boxes, tables, wrap-around text, etc., are generally accessible to students.
  • Few images and alternative content. Students with different visual needs may not be able to access an image and this applies to other content as well: graphs, tables, diagrams, etc. Captions and descriptions for visual-based content can provide students with information they might have missed otherwise.

How to Make Accessible PDF Docs

Please note: This process assumes that you are using Adobe Acrobat Pro, version 9 or higher, on either a Windows or Macintosh computer.

Scanning Process

  • Turn on scanner
  • Place first page on scanner bed, aligned according to size and scanner layout
  • Start Adobe Acrobat Pro from the Start Menu or Launcher
  • Navigate to File > Create PDF From Scanner. Select "Configure Presets."
    • On a Mac you are automatically prompted with the presets option screen below.


OCR1.png

  • Ensure that Optical Character Recognition is selected.
    • DPI must be 300 or higher to ensure the character recognition process is successful.


OCR2.png

  • If you select the "options" button next to the OCR checkbox, you are able to change the OCR type from "ImageScan" to "ClearScan."
    • ClearScan OCR will keep the file size low while maintaining quality.
    • Adobe has an excellent writeup about these options.

Converting an existing PDF

  • Open the PDF in Acrobat Pro
  • Select "Recognize Text In This File" from the right hand side bar
  • Click "Edit" on the pop up window to ensure you have the following settings
  • English US - ClearScan - 300DPI
  • Click OK
  • Save the file
  • Re-open the file
  • Go to File > Save As Optimized PDF. Ensure compatibility is set to Acrobat 10x on the right side
  • Save


Accessibility Resources

Creating Accessible Content

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