lib/nakal/base_screen.rb in nakal-0.1.2 vs lib/nakal/base_screen.rb in nakal-1.0.0

@@ -25,12 +25,15 @@
           @image.crop(x_start, y_start, width_to_consider, height_to_consider)
         end
       end
 
       def compare screen
-        diff_img, diff_metric = self.apply_mask.strip.compare_channel(screen.apply_mask.strip, Magick::RootMeanSquaredErrorMetric)
+        @image.fuzz= 5 * Magick::QuantumRange / 100.0
+        total_pixel = @image.rows * @image.columns
+        diff_img, no_of_pixels_mismatch = self.apply_mask.strip.compare_channel(screen.apply_mask.strip, Magick::AbsoluteErrorMetric)
         diff_screen = Nakal.current_platform::Screen.new("#{@name}_diff", :none, diff_img)
-        return diff_screen, diff_metric
+        percentage_diff = (no_of_pixels_mismatch/total_pixel)*100
+        return diff_screen,percentage_diff
       end
 
       def apply_mask
         image_mask_params = Nakal.default_crop_params[Nakal.device_name][image_relative_path.gsub("_current", "")]
         return self if image_mask_params.nil?