[BlindMath] Discrete Fourier Cosine Transform

[Ray McAllister]

Hi, I'm totally blind, and am going through  linear algebra text online.
They're discussing the Discrete Fourier Cosine Transform used in converting
images to jpeg format.  It's fascinating, but I'm finding it hard to access
the actual matrix so I can copy the numbers down and run them.  And,
frankly, it's in r^8, so I'm not particularly in the mood to hand-copy 64
irrational number expressions for use in a limited number of times.  

 

Does anyone out there have this matrix already written down and could send
it to me by e-mail?  JAWS is really having a hard time breaking the thing
down in the text.  

 

 

Here's the link to where I found the matrix, in case someone can make sense
of it and make sure they're sending me the right thing:

It's just before Activity 3.3.3.  Wow, 3 3's! 

 

 

https://understandinglinearalgebra.org/sec-jpeg.html

 

Thanks, 

Ray. 

 



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