Method: Magick::Image#monochrome?

Defined in:
ext/RMagick/rmimage.cpp

#monochrome? ⇒ Boolean

Return true if all the pixels in the image have the same red, green, and blue intensities and the intensity is either 0 or QuantumRange.

Returns:

  • (Boolean) —

    true if monochrome, false otherwise



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# File 'ext/RMagick/rmimage.cpp', line 9629

VALUE
Image_monochrome_q(VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return has_image_attribute(self, IsImageMonochrome);
#else
    return has_attribute(self, IsMonochromeImage);
#endif
}