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Known Participant
July 29, 2024
Answered

Color halftone dfference in Pixelate and under Filter gallery

  • July 29, 2024
  • 2 replies
  • 629 views

Hey everyone

Please tell me the difference between the color halftone under the pixelate menu and color halftone under the filter gallery menu. The results are different.
I'm attaching a screenshot which shows two pics with the former and latter effects.
Left Image: Color Halftone under Filter Gallery
Right Image: Color Halftone under pixelate menu.

Please help
Thanks

This topic has been closed for replies.
Correct answer davescm

 

Half tone in filter gallery is not colour, it is greyscale (although that scale can be set to go between any foreground and background colour, not just black to white. Dot size is constant but the shade of the dots varies.

 

Colour half tone, in pixellate, lays down a grid of dots using four channels (CMYK) to simulate printed dots on a white sheet. Dot size varies by lightness for each channel.

2 replies

Semaphoric
Community Expert
Community Expert
July 30, 2024

The Filter Gallery Halftone Pattern overlays a pattern of fuzzy grey dots [a cosine function for both X and Y], which looks like a traditional printed halftone when you set the Contrast slider all the way up

The Color Halftone filer divides the image into a grid, with the size controlled by the Max. Diameter field, averages each cell , and puts a circle proportional to that. This softens the image much like the Median filter does.

 

davescm
Community Expert
davescmCommunity ExpertCorrect answer
Community Expert
July 29, 2024

 

Half tone in filter gallery is not colour, it is greyscale (although that scale can be set to go between any foreground and background colour, not just black to white. Dot size is constant but the shade of the dots varies.

 

Colour half tone, in pixellate, lays down a grid of dots using four channels (CMYK) to simulate printed dots on a white sheet. Dot size varies by lightness for each channel.

Known Participant
July 29, 2024

Thank you