[feature] add image downsample func

mm_agents/agent.py

@@ -6,15 +6,17 @@ import re
 import time
 import uuid
 import xml.etree.ElementTree as ET
+import numpy as np
 from http import HTTPStatus
 from io import BytesIO
-from typing import Dict, List
+from typing import Dict, List, Tuple, Union
 
 import backoff
 import dashscope
 import google.generativeai as genai
 import openai
 import requests
+import cv2
 from PIL import Image
 from google.api_core.exceptions import InvalidArgument
 
@@ -26,6 +28,14 @@ from mm_agents.prompts import SYS_PROMPT_IN_SCREENSHOT_OUT_CODE, SYS_PROMPT_IN_S
 
 logger = logging.getLogger("desktopenv.agent")
 
+def downsample_image(img: Union[str, np.ndarray], ratio: Tuple[float, float]):
+    fx, fy = ratio
+    if isinstance(img, str):
+        img = cv2.imread(img)
+
+    resized = cv2.resize(img, None, fx=fx, fy=fy, interpolation=cv2.INTER_AREA)
+    return resized
+
 
 # Function to encode the image
 def encode_image(image_path):