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"""
Utility functions for image processing and data handling.
"""
import os
import shutil
import tempfile
from PIL import Image
import numpy as np
def create_thumbnail(image_path, max_size=(200, 200)):
"""
Create a thumbnail of an image.
Args:
image_path: path to the image file
max_size: maximum size of the thumbnail as (width, height)
Returns:
PIL.Image: thumbnail image
"""
try:
image = Image.open(image_path)
image.thumbnail(max_size)
return image
except Exception as e:
print(f"Error creating thumbnail for {image_path}: {e}")
return None
def create_temp_directory():
"""
Create a temporary directory for storing intermediate files.
Returns:
str: path to the temporary directory
"""
temp_dir = tempfile.mkdtemp(prefix="image_evaluator_")
return temp_dir
def cleanup_temp_directory(temp_dir):
"""
Clean up a temporary directory.
Args:
temp_dir: path to the temporary directory
"""
if os.path.exists(temp_dir):
shutil.rmtree(temp_dir)
def ensure_directory(directory):
"""
Ensure that a directory exists, creating it if necessary.
Args:
directory: path to the directory
Returns:
str: path to the directory
"""
os.makedirs(directory, exist_ok=True)
return directory
def is_valid_image(file_path):
"""
Check if a file is a valid image.
Args:
file_path: path to the file
Returns:
bool: True if the file is a valid image, False otherwise
"""
try:
with Image.open(file_path) as img:
img.verify()
return True
except:
return False
def convert_to_rgb(image_path):
"""
Convert an image to RGB mode if necessary.
Args:
image_path: path to the image file
Returns:
numpy.ndarray: RGB image array
"""
try:
image = Image.open(image_path)
if image.mode != 'RGB':
image = image.convert('RGB')
return np.array(image)
except Exception as e:
print(f"Error converting image to RGB: {e}")
return None
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