Method: Magick::Image#gray?

Defined in:
ext/RMagick/rmimage.cpp

#gray? ⇒ Boolean

Return true if all the pixels in the image have the same red, green, and blue intensities.

Returns:

  • (Boolean) —

    true if image is gray, false otherwise



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# File 'ext/RMagick/rmimage.cpp', line 7956

VALUE
Image_gray_q(VALUE self)
{
#if defined(HAVE_SETIMAGEGRAY)
    return has_attribute(self, (MagickBooleanType (*)(const Image *, ExceptionInfo *))SetImageGray);
#else
    return has_attribute(self, IsGrayImage);
#endif
}