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GMImage.RandomThreshold
Random threshold image.
| Component | Version | macOS | Windows | Linux | Server | FileMaker iOS SDK |
| GraphicsMagick | 2.0 | Yes | Yes | Yes | Yes | Yes |
MBS( "GMImage.RandomThreshold"; ImageRef; thresholds ) More
Parameters
| Parameter | Description | Example |
|---|---|---|
| ImageRef | The image reference number. | 1 |
| thresholds | The rectangle. Geometry is specified as a width and height "100x200". With an optional offset "100x200+10+20". For percent values, add a percent on the end, for % values add a %: "100x200%!" | "100x200" |
Result
Returns "OK" on success.
Description
Random threshold image.Changes the value of individual pixels based on the intensity of each pixel compared to a random threshold. The result is a low-contrast, two color image. The thresholds_ argument is a geometry containing LOWxHIGH thresholds. If the string contains 2x2, 3x3, or 4x4, then an ordered dither of order 2, 3, or 4 will be performed instead. If a ChannelType argument is specified then only the specified channel is altered. This is a very fast alternative to 'quantize' based dithering.
Created 18th August 2014, last changed 18th August 2014
GMImage.Raise - GMImage.RandomThresholdChannel
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