RE: Jaws post processing
- From: "Chris Hofstader" <chris.hofstader@xxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Mon, 14 Apr 2008 12:41:25 -0400
The CRC algorithm for picking those numbers that JAWS employs uses 16 bit
unsigned integers (unless they have finally made the change to 32 bit) which
will, on occasion, result in identical numbers in the same application.
It's like any checksum based system, the larger the possible values, the
less likely there will be a collision.
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Octavian Rasnita
Sent: Monday, April 14, 2008 9:51 AM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Jaws post processing
Oh yes, and I even saw some different controls in the same application
(Microsoft HTML Help Workshop) that use the same graphic number, although
they show different images.
Octavian
----- Original Message -----
From: "Sina Bahram" <sbahram@xxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Monday, April 14, 2008 4:17 PM
Subject: RE: Jaws post processing
> Interesting, and thanks for the correction.
>
> I was under the impression that the graphics ID represented the resource
> ID
> from the bundle that the given application was using, but this is
> apparently
> wrong. Instead it's calculated by jaws based on the bitmap in memory;
> thus,
> resolution, video card, and other things would mess with it, as you said.
>
> Take care,
> Sina
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Chris
> Hofstader
> Sent: Monday, April 14, 2008 8:20 AM
> To: programmingblind@xxxxxxxxxxxxx
> Subject: RE: Jaws post processing
>
> Hi,
>
> All of the numbers one hears after "graphic" in JAWS are CRC values
> calculated by JAWS and not by Windows. The reason they vary from one OS
> version and even one video adapter to another is that some programs use
> different bitmaps to suit different resolutions, sometimes the OS does
> something relatively minor (clipping a graphic to fit a space) and
> sometimes
> a video adapter does something funny at the driver level that will cause
> variations in the resulting CRC.
>
> This has been a long term headache for the JAWS team and, to make matters
> more difficult, if they were to improve their graphics recognition
> algorithm
> by a lot, all of the people who used the graphics labeling facility would
> find that their efforts were broken.
>
> It's all life in the screen scraping world.
>
> cdh
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Sina Bahram
> Sent: Sunday, April 13, 2008 4:42 PM
> To: programmingblind@xxxxxxxxxxxxx
> Subject: RE: Jaws post processing
>
> Hi Andreas,
>
> The application doesn't send jaws that string. Windows assigns a number,
> that can change based on operating system, computer, specific applications
> installed, and even reboot to the resources that the application uses,
> such
> as that image. Now that I think about it ... The numbers might be more
> consistent than that, because several jgf files exist for jaws which just
> label these graphics, but anyways, I digress.
>
> The point is that jaws takes that number and tells it to you, if you have
> the speaking of unlabeled graphics enabled, but the application doesn't
> send
> jaws that string ... That's jaws which generates that string.
>
> So you have three options. Run the jaws automatic graphics labeler, and if
> the graphics have tooltips assigned and properly display them, then jaws
> will try to cycle through and automatically label these graphics. Your
> second option is to do so yourself, one at a time. Your third option is to
> change the underlying application to have labeled graphics.
>
> Use insert+control+g to run the jaws automatic labeler, and use insert+g
> to
> bring up the graphics labeler.
>
> Take care,
> Sina
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Andreas Stefik
> Sent: Sunday, April 13, 2008 4:27 PM
> To: programmingblind@xxxxxxxxxxxxx
> Subject: Jaws post processing
>
> Hey folks,
>
> Quick question about using Jaws scripts. If I have an application that
> sends
> JAWS some poorly chosen audio, is it possible to post process these word
> choices on the JAWS end?
>
> For example, suppose an environment represents a graphic, maybe it says,
> "Graphic 409." Is it possible to write a script, on the JAWS end, to
> recognize that it received graphic 409, and change it to something more
> sensible? (Like, Graphic of a yellow arrow)
>
> Any short code samples on how to do this?
>
> Andreas
> __________
> View the list's information and change your settings at
> //www.freelists.org/list/programmingblind
>
> __________
> View the list's information and change your settings at
> //www.freelists.org/list/programmingblind
>
>
> .
>
> __________ NOD32 3024 (20080414) Information __________
>
> This message was checked by NOD32 antivirus system.
> http://www.eset.com
>
> __________
> View the list's information and change your settings at
> //www.freelists.org/list/programmingblind
>
> __________
> View the list's information and change your settings at
> //www.freelists.org/list/programmingblind
>
__________
View the list's information and change your settings at
//www.freelists.org/list/programmingblind
__________ NOD32 3025 (20080414) Information __________
This message was checked by NOD32 antivirus system.
http://www.eset.com
__________
View the list's information and change your settings at
//www.freelists.org/list/programmingblind
Other related posts:
