Method: Magick::Image#segment

Defined in:

ext/RMagick/rmimage.c

#segment(*args) ⇒ Object

Call SegmentImage.

Ruby usage:

- @verbatim Image#segment @endverbatim
- @verbatim Image#segment(colorspace) @endverbatim
- @verbatim Image#segment(colorspace,cluster_threshold) @endverbatim
- @verbatim Image#segment(colorspace,cluster_threshold,smoothing_threshold) @endverbatim
- @verbatim Image#segment(colorspace,cluster_threshold,smoothing_threshold,verbose) @endverbatim

Notes:

- Default colorspace is RGBColorspace
- Default cluster_threshold is 1.0
- Default smoothing_threshold is 1.5
- Default verbose is false
- The default values are the same as Magick++

Parameters:

• argc —

  number of input arguments

• argv —

  array of input arguments

• self —

  this object

Returns:

• a new image

# File 'ext/RMagick/rmimage.c', line 11624

VALUE
Image_segment(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    int colorspace              = RGBColorspace;    // These are the Magick++ defaults
    unsigned int verbose        = MagickFalse;
    double cluster_threshold    = 1.0;
    double smoothing_threshold  = 1.5;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 4:
            verbose = RTEST(argv[3]);
        case 3:
            smoothing_threshold = NUM2DBL(argv[2]);
        case 2:
            cluster_threshold = NUM2DBL(argv[1]);
        case 1:
            VALUE_TO_ENUM(argv[0], colorspace, ColorspaceType);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 4)", argc);
            break;
    }

    new_image = rm_clone_image(image);

    (void) SegmentImage(new_image, colorspace, verbose, cluster_threshold, smoothing_threshold);
    rm_check_image_exception(new_image, DestroyOnError);
    rm_ensure_result(new_image);

    return rm_image_new(new_image);
}