FX special effects are a powerful “micro” language to work with. Simple functions & operators offer a unique way to access & manipulate image data. The fx() method applies a FX expression, and generates a new Image instance.
We can create a custom DIY filter that will turn the image black & white, except colors with a hue above 324°, or below 36°.
Parameter Input Type Description expression basestring The entire FX expression to apply. channel CHANNELS Optional channel to target.
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