magickGUI (version 1.3.1)

interactive_canny: interactive canny edge detection

Description

Using image_canny of 'magick' interactively. radius, sigma, lower%, and upper% are parameters of image_canny. See reference manual of 'magick' for detail.

Usage

interactive_canny(
  image,
  range_max_radius = 30,
  range_max_sigma = 2,
  resolution = 0.1,
  return_param = FALSE,
  scale
)

Value

a magick image object or values of radius, sigma, lower%, and upper% represented in the format of 'magick'

Arguments

image

a magick image object

range_max_radius

define maximum in slider of radius. must be positive.

range_max_sigma

define maximum in slider of sigma. must be positive.

resolution

resolution of slider

return_param

If return_param is TRUE, returns values of radius, sigma, lower%, and upper% represented in the format of 'magick'. If return_param is FALSE, returns a magick image object.

scale

geometry to be passed to image_scale function of magick package. image is scaled just for preview and result image is not scaled if scale is given.

Author

Shota Ochi

Examples

# \donttest{
if (interactive())
{
  interactive_canny(wizard)
}
# }