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  • Moire no more

    From Eli the Bearded@*@eli.users.panix.com to rec.photo.digital on Sun Jul 19 20:26:08 2026
    From Newsgroup: rec.photo.digital

    NB: Not sure this belongs here, but will consider suggested other groups.

    About five years ago Marcin Wichary, who loves keyboards and quality
    photos, posted to one of his blogs about using some absolutely terrible research scientist quality code to reverse the halftoning process on
    images scanned from prints. The technique was not a naive blur and
    sharpen, but inverse fast Fourier:

    https://newsletter.shifthappens.site/archive/moire-no-more/

    In the time since that blog was published, has anyone made a better
    inverse FFT tool? Ideally something that runs on Linux, for my uses.

    Elijah
    ------
    Wichary wrote "Shift Happens" about the evolution of keyboards
    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From David B.@David@hotmail.co.uk to rec.photo.digital,alt.computer.workshop on Sun Jul 19 23:42:51 2026
    From Newsgroup: rec.photo.digital

    On 19/07/2026 21:26, Eli the Bearded wrote:
    NB: Not sure this belongs here, but will consider suggested other groups.

    About five years ago Marcin Wichary, who loves keyboards and quality
    photos, posted to one of his blogs about using some absolutely terrible research scientist quality code to reverse the halftoning process on
    images scanned from prints. The technique was not a naive blur and
    sharpen, but inverse fast Fourier:

    https://newsletter.shifthappens.site/archive/moire-no-more/

    In the time since that blog was published, has anyone made a better
    inverse FFT tool? Ideally something that runs on Linux, for my uses.

    Elijah
    ------
    Wichary wrote "Shift Happens" about the evolution of keyboards


    Hello Elijah :-D

    I've cross-posted to ACW to see if you'll find any help/advice there.
    --
    Kind regards,
    David
    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From Eli the Bearded@*@eli.users.panix.com to rec.photo.digital,alt.computer.workshop on Mon Jul 20 00:17:16 2026
    From Newsgroup: rec.photo.digital

    In rec.photo.digital, David B. <boaterdave@hotmail.co.uk> wrote:
    NB: Not sure this belongs here, but will consider suggested other groups. ...
    https://newsletter.shifthappens.site/archive/moire-no-more/
    In the time since that blog was published, has anyone made a better
    inverse FFT tool? Ideally something that runs on Linux, for my uses.
    Hello Elijah :-D

    I've cross-posted to ACW to see if you'll find any help/advice there.

    Thanks. That's not a group I have on my local server, so I'm unfamiliar
    with it.

    Elijah
    ------
    may ask for it to be carried here
    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From David B.@David@hotmail.co.uk to rec.photo.digital,alt.computer.workshop on Mon Jul 20 07:17:21 2026
    From Newsgroup: rec.photo.digital

    On 20/07/2026 01:17, Eli the Bearded wrote:
    In rec.photo.digital, David B. <boaterdave@hotmail.co.uk> wrote:
    NB: Not sure this belongs here, but will consider suggested other groups.
    ...
    https://newsletter.shifthappens.site/archive/moire-no-more/
    In the time since that blog was published, has anyone made a better
    inverse FFT tool? Ideally something that runs on Linux, for my uses.
    Hello Elijah :-D

    I've cross-posted to ACW to see if you'll find any help/advice there.

    Thanks. That's not a group I have on my local server, so I'm unfamiliar
    with it.

    Elijah
    ------
    may ask for it to be carried here


    I decided to ask Gemini AI - please find its comments here:-

    https://share.gemini.google/N21kVC3PPEaY

    I'll leave the ball in your court, Elijah! EfOe
    --
    David
    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From Brock McNuggets@brock.mcnuggets@gmail.com to alt.computer.workshop,rec.photo.digital on Mon Jul 20 07:31:21 2026
    From Newsgroup: rec.photo.digital

    On Jul 19, 2026 at 3:42:51rC>PM MST, ""David B."" wrote <nc527bFotnbU1@mid.individual.net>:

    On 19/07/2026 21:26, Eli the Bearded wrote:
    NB: Not sure this belongs here, but will consider suggested other groups.

    About five years ago Marcin Wichary, who loves keyboards and quality
    photos, posted to one of his blogs about using some absolutely terrible
    research scientist quality code to reverse the halftoning process on
    images scanned from prints. The technique was not a naive blur and
    sharpen, but inverse fast Fourier:

    https://newsletter.shifthappens.site/archive/moire-no-more/

    In the time since that blog was published, has anyone made a better
    inverse FFT tool? Ideally something that runs on Linux, for my uses.

    Elijah
    ------
    Wichary wrote "Shift Happens" about the evolution of keyboards


    Hello Elijah :-D

    I've cross-posted to ACW to see if you'll find any help/advice there.

    I think there is a plugin for GIMP to "undo" halftone -- but would need to spend some time to be more specific. Could even be wrong.
    --
    It's impossible for someone who is at war with themselves to be at peace with you.
    --- Synchronet 3.22a-Linux NewsLink 1.2