Class: ImageVise::Sharpen

Inherits:
Object
  • Object
show all
Defined in:
lib/image_vise/operators/sharpen.rb

Overview

Applies a sharpening filter to the image.

The corresponding Pipeline method is ‘sharpen`.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Sharpen

Returns a new instance of Sharpen.

Raises:

  • (ArgumentError) 


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# File 'lib/image_vise/operators/sharpen.rb', line 5

def initialize(*)
  super
  self.radius = radius.to_f
  self.sigma = sigma.to_f
  raise ArgumentError, ":radius must positive" unless sigma > 0
  raise ArgumentError, ":sigma must positive" unless sigma > 0
end

Instance Method Details

#apply!(magick_image) ⇒ Object 



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# File 'lib/image_vise/operators/sharpen.rb', line 13

def apply!(magick_image)
  sharpened_image = magick_image.sharpen(radius, sigma)
  magick_image.composite!(sharpened_image, Magick::CenterGravity, Magick::CopyCompositeOp)
ensure
  ImageVise.destroy(sharpened_image)
end