Feedback needed - Contrast & Image accessibility Issue

Hi all,
We need some feedback on this issue. Please add thoughts, references,
proposals, images, etc. to wiki

1.2 Contrast & Image accessibility
<https://www.w3.org/WAI/GL/low-vision-a11y-tf/wiki/LVTF_Open_Issues#Contrast_.26_Image_accessibility>

Text Contrast
<http://w3c.github.io/low-vision-a11y-tf/requirements.html#text-contrast>
has:

*User Need:* Users can set the background color and the text color from the
full color spectrum.

Not Relying on Color
<http://w3c.github.io/low-vision-a11y-tf/requirements.html#not-relying-on-color>
has:

*User Need:* Color is not used as the only visual means of conveying
information, indicating an action, prompting a response, or distinguishing
a visual element.

Issues and thoughts:

   - Perhaps "Users can set the background color and the text color" needs
   to be broader. Foreground/background are two elements. There may be many
   other elements on the page with color that needs to be adjusted. {jim}


   - Perhaps for images something broad along the lines of:

*User Need:* People with Low Vision can perceive important information in
images." {Laura}


   - What about contrast in images? ("SUMMARY: When images fail to provide
   a sufficient contrast ratio, content is not perceivable.*—[Laura UC-6 in
   use cases
   <https://www.w3.org/WAI/GL/low-vision-a11y-tf/wiki/User_stories_-_use_cases#Color_and_Contrast>]*
   (remember that some people need low luminosity)


   - LowVis -GitHub Issue 96: Graphics contrast is unmentioned (except as
   exceptions) <https://github.com/w3c/wcag/issues/96>
      - [LVTF] Joshue O Connor asked for a volunteer to draft a Technique
      for WCAG Issue 96
      <https://lists.w3.org/Archives/Public/w3c-wai-gl/2016JanMar/0143.html>.
      Laura volunteered and drafted a Using sufficient contrast for images
      that convey information technique.
      <https://www.w3.org/WAI/GL/wiki/Using_sufficient_contrast_for_images_that_convey_information>
      Discussion and ideas for improvement would be appreciated. Thanks, Laura.
      - Related issues: Text in images – relates to other aspects of
      changing text, too, e.g., size, family, leading, etc.


   - What about images overall?
      - Possibly access to alt text and long descriptions?








-- 
Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9264  http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964