Python: Resize Image While Keeping Aspect Ratio

Example 1: Resize Image Using OpenCV

import cv2

# Read the image
image = cv2.imread('path/to/your/image.jpg')

# Specify the target width (e.g., 300 pixels)
target_width = 300

# Calculate the aspect ratio
aspect_ratio = image.shape[1] / image.shape[0]

# Calculate the target height to maintain the aspect ratio
target_height = int(target_width / aspect_ratio)

# Resize the image
resized_image = cv2.resize(image, (target_width, target_height))

Output:

# Display the resized image

Example 2: Resize Image Using PIL (Pillow)

from PIL import Image

# Open the image
image = Image.open('path/to/your/image.jpg')

# Specify the target width (e.g., 300 pixels)
target_width = 300

# Calculate the aspect ratio
aspect_ratio = image.width / image.height

# Calculate the target height to maintain the aspect ratio
target_height = int(target_width / aspect_ratio)

# Resize the image
resized_image = image.resize((target_width, target_height))

Output:

# Display the resized image (if needed)

Example 3: Resize Image Using scikit-image

from skimage import io, transform

# Read the image
image = io.imread('path/to/your/image.jpg')

# Specify the target width (e.g., 300 pixels)
target_width = 300

# Calculate the aspect ratio
aspect_ratio = image.shape[1] / image.shape[0]

# Calculate the target height to maintain the aspect ratio
target_height = int(target_width / aspect_ratio)

# Resize the image
resized_image = transform.resize(image, (target_height, target_width))

Output:

# Display the resized image (if needed)