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Offline Jean Giraud  
#21 Posted : 14 September 2020 18:32:33(UTC)
Jean Giraud


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Canada

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Originally Posted by: Razonar Go to Quoted Post
Just an utility for work with JPG and Fourier transforms.

Thanks Alvaro, most interesting.
Just different than the Mathcad model in demo added.
The all thing is around Fourier DCT-II [Cosine transform].
JPEG consists in eliminating the diagonal of the image details,
or simply minimizing influence along the diagonal.
DCT-II works well in Smath, as applied otherwise.

Cheers ... Jean

Pattern ZigZag JPEG.sm (191kb) downloaded 6 time(s).
Offline Jean Giraud  
#22 Posted : 14 September 2020 18:45:45(UTC)
Jean Giraud


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Joined: 04/07/2015(UTC)
Posts: 4,791
Canada

Was thanked: 801 time(s) in 635 post(s)
Smath Code dct2(f) ... idct2(g)

Fourier DCT-II Smath CODE.sm (39kb) downloaded 6 time(s).
Offline Davide Carpi  
#23 Posted : 15 September 2020 02:08:26(UTC)
Davide Carpi


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Joined: 13/01/2012(UTC)
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Italy
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Was thanked: 1164 time(s) in 766 post(s)
PLUGIN UPDATED SMath Studio 0.99.7561 and later

  • fixed ifftshift() issues with vectors;
  • plugin migrated to .NET Core 2 and .NET Standard 2;
If you like my plugins please consider a donation to SMath Studio; for personal contributions to me: paypal.me/dcprojects
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