[BlindMath] Scanning braille for sight reading

[John G. Heim]

My instructor is sighted. She can sight-read the braille if the dots 
come up clearly enough in the scanned document. I guess I wouldn't be 
taking the course if I could see but if I could, all I'd have to do is 
to keep tweaking the scanner settings until it worked. I think the first 
thing I am going to do is increase the DPI. There is a lot of info out 
there that says 300 DPI is best for OCR and my own experiments have 
confirmed that.  But a higher DPI might be better just to get braille 
dots to show up on a scanner.



On 07/26/2017 04:43 AM, George Bell wrote:
> Hi John,
>
> Scanning embossed braille is not an easy task.  Indeed there was once a
> program called "OBR" (Optical Braille Recognition).  But even that required
> that specific makes and models of scanner be used, which allowed control of
> lighting during the scan.
>
> You instructor should know this.
>
> Do I get the impression you are using a Perkins type braille writer as
> opposed to say 6 key entry into PC braille software such as Duxbury?
>
> George
>
> -----Original Message-----
> From: BlindMath [mailto:blindmath-bounces at nfbnet.org] On Behalf Of John G
> Heim via BlindMath
> Sent: 25 July 2017 15:02
> To: Blind Math list for those interested in mathematics
> Cc: John G Heim
> Subject: [BlindMath] Scanning braille for sight reading
>
> I'm taking a braille class through Hadley School for the Blind. I am trying
> to submit my homework assignments as scanned images of braille pages for the
> instructor to sight-read. The instructor asked me to scan them as photos but
> I don't know what that means. Does anybody have experience scanning in
> braille and can tell me the best format, mode, and dpi settings? I sent my
> instructor tif line-art at 300 dpi which works well for OCR but that didn't
> work for sight-reading braille.
>
>
> --
> --
> John G. Heim; jheim at math.wisc.edu; sip://jheim@sip.linphone.org
>
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