update GIMP examples and eval

desktop_env/evaluators/metrics/gimp.py

@@ -1,5 +1,5 @@
 import os
-
+from PIL import Image, ImageChops, ImageStat
 
 def get_gimp_export_path():
     # Path to GIMP's configuration file. This example assumes GIMP version 2.10.
@@ -21,21 +21,19 @@ def get_gimp_export_path():
         print("GIMP configuration file not found")
         return False
 
-from PIL import Image, ImageChops, ImageStat
+def increase_saturation(image1_path: str, image2_path: str) -> float:
+    def calculate_saturation(image):
+        # convert the image to HSV mode
+        hsv_image = image.convert("HSV")
 
-def calculate_saturation(image):
-    # convert the image to HSV mode
-    hsv_image = image.convert("HSV")
+        saturation_channel = hsv_image.split()[1]
 
-    saturation_channel = hsv_image.split()[1]
+        # calculate the mean saturation level
+        stat = ImageStat.Stat(saturation_channel)
+        mean_saturation = stat.mean[0]
 
-    # calculate the mean saturation level
-    stat = ImageStat.Stat(saturation_channel)
-    mean_saturation = stat.mean[0]
+        return mean_saturation
 
-    return mean_saturation
-
-def increase_saturation(image1_path, image2_path):
     image1 = Image.open(image1_path)
     image2 = Image.open(image2_path)
 
@@ -45,17 +43,17 @@ def increase_saturation(image1_path, image2_path):
 
     return 1 if saturation1 < saturation2 else 0
 
-def calculate_brightness(image):
-    # Convert the image to grayscale mode
-    grayscale_image = image.convert("L")
+def decrease_brightness(image1_path: str, image2_path: str) -> float:
+    def calculate_brightness(image):
+        # Convert the image to grayscale mode
+        grayscale_image = image.convert("L")
 
-    # Get the image data
-    pixels = list(grayscale_image.getdata())
+        # Get the image data
+        pixels = list(grayscale_image.getdata())
 
-    brightness = sum(pixels) / len(pixels)
-    return brightness
+        brightness = sum(pixels) / len(pixels)
+        return brightness
 
-def decrease_brightness(image1_path, image2_path):
     image1 = Image.open(image1_path)
     image2 = Image.open(image2_path)
 
@@ -65,12 +63,9 @@ def decrease_brightness(image1_path, image2_path):
     return 1 if brightness1 > brightness2 else 0
 
 if __name__ == "__main__":
-    # 输入两张图片的路径
     image1_path = "../Downloads/1.png"
     image2_path = "../Downloads/edited_darker.png"
 
-    # 比较图片亮度
     decrease_brightness(image1_path, image2_path)
-    
-    # 比较图片饱和度
+
     increase_saturation(image1_path, image2_path)