How to convert Imagemagick's -morphology Erode Square into Rmagick?

Question

I have tried the following code in imagemagick:

convert input.jpg -morphology Erode Square output.jpg 

I need to convert it into RMagick so that I can use in rails application

Answer 1

You can always write it using the << operator:

MiniMagick::Tool::Convert.new do |convert|
  convert << 'input.jpg'
  convert << '-morphology' << 'Erode' << 'Square'
  convert << 'output.jpg'
end