crop.rb

require "rmagick"

crop = [
  0.46558651328086853,  # x1 (proportion from left)
  0.471098929643631,    # x2 (proportion from left)
  0.5287885069847107,   # y1 (proportion from top)
  0.5272343754768372,   # y2 (proportion from top)
]
input_path = "./input.jpeg"

begin
  image = Magick::Image.read(input_path).first
  width = image.columns
  height = image.rows

  # Convert normalized coordinates to absolute pixels
  x = (width * crop[0]).round
  crop_width = (width * (crop[1] - crop[0])).round # x2 - x1
  y = (height * crop[2]).round
  crop_height = (height * (crop[3] - crop[2])).round # y2 - y1

  cropped_image = image.crop(x, y, crop_width, crop_height)
  cropped_image.write("output.jpeg")
rescue Magick::ImageMagickError => e
  puts "Error processing image: #{e.message}"
rescue StandardError => e
  puts "Error: #{e.message}"
ensure
  image&.destroy!
  cropped_image&.destroy!
end