[jawsscripts] Re: Convenient OCR usage with Flash installation window

  • From: Don Marang <donald.marang@xxxxxxxxx>
  • To: jawsscripts@xxxxxxxxxxxxx
  • Date: Sat, 20 Oct 2012 08:39:25 -0400

Normally, before performing OCR of a screen or window, an image of the
area is taken and some preprocessing is performed.  It is possible to
help with contrast problems to convert to grayscale and then set a
threshold and convert to black and White.  Like I said before, most OCR
engines do not do well with inverse video or low resolution, so
reversing colors and enlarging 3x may be needed as well. 
However, I am not sure these OCR preprocessing tips help with the JAWS
Convenience OCR.  I am not sure there is any method to manipulate or get
access to the temporary image of the window before OCR is performed. 


*Don Marang*
Vinux Package Development Coordinator - vinuxproject.org
<http://www.vinuxproject.org/>


On 10/20/2012 12:06 AM, Geoff Chapman wrote:
> Thanks for this david.
>
> Firstly not relevant I know, but I simply cannot belieeeeeeve adobe has 
> gotten away with providing such a ridiculously inaccessibly/poorly coded 
> front end flash updater! for, - how many years now? just unbelievable!
>
>
> Secondly though, I think somehow I've disabled this, or made it autoupdate 
> or something,
> as I haven't seen it pop up on my machine for a goodish while now.
>
> Do you know if there's a way of forcing it to reappear by any chance?
>
> Problem is with messing with color schemes in windows, is I'd imagine 
> optimally you'd kinda need a sightling nearby to indicate what kind of 
> contrast difference one's choices actually visually made to that window, 
> before running the Convenient OCR test on it.
> Would not one?
> tricky!
> ----- Original Message ----- 
> From: "David Farough" <David.Farough@xxxxxxxxxxxxx>
> To: <jawsscripts@xxxxxxxxxxxxx>
> Sent: Saturday, October 20, 2012 12:47 AM
> Subject: [jawsscripts] Convenient OCR usage with Flash installation window
>
>
>> Recently someone on the list suggested that Convenient OCR might help
>> with the Flash installation screen.  Recently I tried it out.  The only
>> text that convenient OCR could find was the window title.  Probably
>> because much of the window is dark red with light or white text.  Those
>> infamous buttons are black text on a gray background.  this is a good
>> example which seems to strengthen Don's findings.
>>
>> If anyone gets better results than I had I would be interested to know
>> how they did it.
>>
>> David Farough
>> Application Accessibility Coordinator/coordonateur de l'accessibilité
>> Information Technology Services Directorate /
>> Direction des services d'information technologiques
>> Public Service Commission / Commission de la fonction publique
>> Email / Courriel:  David.Farough@xxxxxxxxxxxxx
>> Tel. / Tél:    (613) 992-2779
>>
>>>>> Don Marang <donald.
>> Most of my experience with color combinations is with attempting to
>> get
>> good results from screen snapshots in Vinux with my speedy-ocr profgam.
>>
>> It needs good contrast and does not do well in inverse video.  I want
>> to
>> find a way to tell if inverse colors are being used, so I can reverse
>> them again before performing OCR.  I probably will run the OCR both
>> ways
>> and pick the most accurate.  First, I need to determine automatically
>> which is more accurate, possibly by getting confidence info from the
>> OCR
>> engine.
>>
>> I have yet to find an accessible light text on a dark background color
>> scheme for my website suitable for low vision users.  I have not found
>> good colors for visited, hover, and active links.
>>
>>
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