Overlay two same sized images in Python

Overlay two same sized images in Python

To overlay two images of the same size in Python, you can use libraries like OpenCV or Pillow. Here are examples using both libraries:

Using OpenCV:

import cv2 # Load the two images you want to overlay image1 = cv2.imread('image1.jpg') image2 = cv2.imread('image2.png') # Make sure both images have the same size image2 = cv2.resize(image2, (image1.shape[1], image1.shape[0])) # Specify the transparency factor (between 0 and 1) alpha = 0.5 # Perform the overlay by blending the two images overlay = cv2.addWeighted(image1, alpha, image2, 1 - alpha, 0) # Save or display the overlayed image cv2.imwrite('overlayed_image.jpg', overlay) cv2.imshow('Overlayed Image', overlay) cv2.waitKey(0) cv2.destroyAllWindows()

In this example, we load two images (image1.jpg and image2.png), resize image2 to match the dimensions of image1, specify an alpha value for transparency, and then blend the two images using cv2.addWeighted.

Using Pillow:

from PIL import Image # Open the two images you want to overlay image1 = Image.open('image1.jpg') image2 = Image.open('image2.png') # Make sure both images have the same size image2 = image2.resize(image1.size) # Specify the transparency factor (between 0 and 255) alpha = 128 # Create a new image as the overlay overlay = Image.blend(image1, image2, alpha / 255) # Save or display the overlayed image overlay.save('overlayed_image.jpg') overlay.show()

In this example, we open the two images using Pillow, resize image2 to match the dimensions of image1, specify an alpha value for transparency (ranging from 0 to 255), and then blend the two images using Image.blend.

These examples demonstrate how to overlay two images of the same size with transparency in Python using OpenCV and Pillow. You can adjust the alpha value to control the transparency level of the overlay.

Examples

  1. Overlaying Images with OpenCV in Python:

    • Description: OpenCV provides functions to overlay two images in Python. You can achieve this by blending the images using the cv2.addWeighted() function.
    • Code:
      import cv2 # Load two images image1 = cv2.imread('image1.jpg') image2 = cv2.imread('image2.jpg') # Overlay images alpha = 0.5 # Adjust transparency blended = cv2.addWeighted(image1, alpha, image2, 1 - alpha, 0) # Display the overlayed image cv2.imshow('Overlay', blended) cv2.waitKey(0) cv2.destroyAllWindows()

  2. Overlay Two Images with NumPy in Python:

    • Description: You can overlay two images in Python using NumPy by simply adding or averaging pixel values.
    • Code:
      import cv2 import numpy as np # Load two images image1 = cv2.imread('image1.jpg') image2 = cv2.imread('image2.jpg') # Overlay images using NumPy blended = cv2.addWeighted(image1, 0.5, image2, 0.5, 0) # Display the overlayed image cv2.imshow('Overlay', blended) cv2.waitKey(0) cv2.destroyAllWindows()

  3. Overlaying Images with PIL in Python:

    • Description: PIL (Python Imaging Library) allows overlaying images by blending them using the Image.blend() method.
    • Code:
      from PIL import Image # Open two images image1 = Image.open('image1.jpg') image2 = Image.open('image2.jpg') # Overlay images alpha = 0.5 # Adjust transparency blended = Image.blend(image1, image2, alpha) # Display the overlayed image blended.show()

  4. Superimpose Images with Matplotlib in Python:

    • Description: Matplotlib can be used to superimpose two images in Python by plotting them on the same axes.
    • Code:
      import matplotlib.pyplot as plt # Load and plot two images image1 = plt.imread('image1.jpg') image2 = plt.imread('image2.jpg') plt.imshow(image1) plt.imshow(image2, alpha=0.5) # Adjust transparency plt.axis('off') plt.show()

  5. Overlaying Images with ImageMagick in Python:

    • Description: ImageMagick is a powerful tool for image processing, including overlaying images. You can use the composite command to achieve this.
    • Code:
      import subprocess # Overlay two images using ImageMagick subprocess.call(['composite', '-blend', '50', 'image1.jpg', 'image2.jpg', 'output.jpg'])

  6. Blend Images with Scikit-image in Python:

    • Description: Scikit-image provides functions to blend or overlay images in Python, such as skimage.color.rgb2gray() and skimage.exposure.blend_images().
    • Code:
      from skimage import io, color, exposure # Load two images image1 = io.imread('image1.jpg') image2 = io.imread('image2.jpg') # Convert images to grayscale gray1 = color.rgb2gray(image1) gray2 = color.rgb2gray(image2) # Blend images blended = exposure.blend_images(gray1, gray2, alpha=0.5) # Display the overlayed image io.imshow(blended) io.show()

  7. Overlay Images with Wand in Python:

    • Description: Wand is a Python binding for ImageMagick, allowing you to overlay images using its composite() function.
    • Code:
      from wand.image import Image # Open two images with Image(filename='image1.jpg') as img1: with Image(filename='image2.jpg') as img2: # Overlay images img1.composite(img2, left=0, top=0) # Save or display the overlayed image img1.save(filename='overlayed_image.jpg')

  8. Combine Images with Pygame in Python:

    • Description: Pygame provides functionalities to overlay images by blitting one surface onto another.
    • Code:
      import pygame # Initialize pygame pygame.init() # Set the dimensions of the display width, height = 800, 600 screen = pygame.display.set_mode((width, height)) # Load images image1 = pygame.image.load('image1.jpg') image2 = pygame.image.load('image2.jpg') # Overlay images screen.blit(image1, (0, 0)) screen.blit(image2, (0, 0)) # Update the display pygame.display.flip() # Keep the window open until closed by the user running = True while running: for event in pygame.event.get(): if event.type == pygame.QUIT: running = False

  9. Overlaying Images with Wand in Python:

    • Description: Wand, a Python binding for ImageMagick, provides a convenient way to overlay images using its composite() function.
    • Code:
      from wand.image import Image # Open two images with Image(filename='image1.jpg') as img1: with Image(filename='image2.jpg') as img2: # Overlay images img1.composite(img2, left=0, top=0) # Save or display the overlayed image img1.save(filename='overlayed_image.jpg')

  10. Blend Images with Pygame in Python:

    • Description: Pygame offers functionalities to blend images by altering the transparency of surfaces.
    • Code:
      import pygame # Initialize pygame pygame.init() # Set the dimensions of the display width, height = 800, 600 screen = pygame.display.set_mode((width, height)) # Load images image1 = pygame.image.load('image1.jpg') image2 = pygame.image.load('image2.jpg') # Overlay images with adjustable transparency alpha = 128 # Adjust transparency (0 to 255) image2.set_alpha(alpha) screen.blit(image1, (0, 0)) screen.blit(image2, (0, 0)) # Update the display pygame.display.flip() # Keep the window open until closed by the user running = True while running: for event in pygame.event.get(): if event.type == pygame.QUIT: running = False

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