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pix_alpha

The pix_alpha object in Pure Data modifies the alpha channel of an RGBA image based on RGB color thresholding. It sets the alpha value of pixels to a specified "pass" or "other" value depending on whether their RGB components fall within a defined high and low threshold range. This allows for selective transparency based on pixel color, primarily used with GEM for image manipulation.


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  • Download via Deken.

    Open Pd and go to ToolsFind Externals. Search for zexy and install it. Then create an object with declare -lib zexy -path zexy. Finally, use pix_alpha or any other object from zexy.

  • Library developed mainly by Johannes M. Zmölnig.
  • Report Bugs/Errors here!
  • Available for .

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