def title_min_height
      @title_min_height ||= begin
        height = fetch_config['title_min_height'] || 0
        if height.kind_of?(String) && height.end_with?('%')
          height = ([image.width, image.height].min * height.to_f * 0.01).ceil
        end
        height
      end
    end
def title_min_height
      @title_min_height ||= begin
        height = fetch_config['title_min_height'] || 0
        if height.kind_of?(String) && height.end_with?('%')
          height = ([image.width, image.height].min * height.to_f * 0.01).ceil
        end
        height
      end
    end
Minimum height for the title