2 ms·

Coporation BTW, what makes the pictures in the paper wildly dithered like that?

• re9 4y ago
  Scanning printed material probably, newspaper photos are made of dots... Printing + scanning artifact -- https://www.scantips.com/basics06.html https://www.scantips.com/basics06.html https://photo.stackexchange.com/questions/70139/what-caused-this-pattern-of-lines-moire-in-this-picture-i-scanned-from-a-book https://photo.stackexchange.com/questions/70139/what-caused-...
  • rbanffy 4y ago
    Also, how to fix it: https://www.getrevue.co/profile/shift-happens/issues/moire-no-more-688319 https://www.getrevue.co/profile/shift-happens/issues/moire-n...
    • re9 4y ago
      Probably easier with ImageMagick: https://legacy.imagemagick.org/Usage/fourier/#noise_removal https://legacy.imagemagick.org/Usage/fourier/#noise_removal
• Maursault 4y ago
  The original image was, of course, a photograph made from negative B&W film. For one color printing, the picture was halftoned[1] to simulate greyscale or continuous tone. When the reproduced halftone image was scanned, due to the scanning dpi, it created a moiré pattern.[2] [1] https://en.wikipedia.org/wiki/Halftone https://en.wikipedia.org/wiki/Halftone [2] https://en.wikipedia.org/wiki/Moiré_pattern https://en.wikipedia.org/wiki/Moiré_pattern