How to stitch and collage pictures using Python

How to use Python to stitch and collage pictures

In modern social media, picture stitching and collage is a common image processing technique that can Merge multiple images into one, or combine an image with other elements. Python provides many powerful image processing libraries, making picture stitching and collage very simple. This article will introduce the use of the Pillow library and the OpenCV library in Python to implement image splicing and collage.

First, we need to install the Pillow library and the OpenCV library. It can be installed through the following command:

pip install Pillow
pip install opencv-python

Next, we need to prepare some pictures for experiment. We can select several pictures that need to be stitched or collaged and save them to a folder.

Suppose we have three images, namely img1.jpg, img2.jpg and img3.jpg. Now we will start stitching and collaging these images using Python.

Picture splicing

For picture splicing, we can use the Pillow library to achieve it. The following is a sample code that shows how to splice two images together vertically:

from PIL import Image

# 打开图片
img1 = Image.open('img1.jpg')
img2 = Image.open('img2.jpg')

# 调整图片大小
img1 = img1.resize((img1.width, img2.height))

# 创建新图片，宽度为两张图片的宽度之和，高度为两张图片的高度之和
result = Image.new(img1.mode, (img1.width, img1.height + img2.height))

# 在新图片上粘贴第一张图片
result.paste(img1, (0, 0))

# 在新图片上粘贴第二张图片
result.paste(img2, (0, img1.height))

# 保存结果
result.save('result.jpg')

We first open the two images, and then adjust the size of img1 through the resize() method so that its height is the same as img2 of the same height. Then we create a new image result whose width is the sum of the widths of the two images and whose height is the sum of the heights of the two images. Finally, we paste the two images together using the paste() method on the new image and save the result as result.jpg.

Picture collage

For picture collage, we can use the OpenCV library to achieve it. Here is a sample code that shows how to collage one image on top of another:

import cv2

# 读取图片
image = cv2.imread('img3.jpg')

# 读取logo图片
logo = cv2.imread('logo.png')

# 调整logo图片的尺寸
logo = cv2.resize(logo, (100, 100))

# 在图片上放置logo
x = 50
y = 50
image[y:y+logo.shape[0], x:x+logo.shape[1]] = logo

# 保存结果
cv2.imwrite('result.jpg', image)

First, we read the two images using the cv2.imread() method, and then use cv2. The resize() method adjusts the size of the logo image. Next, we determine the location of the logo image by setting the x and y values, and use the image array for collage. Finally, we use the cv2.imwrite() method to save the result as result.jpg.

Through the above sample code, we can easily implement image splicing and collage in Python. Whether it's a simple picture stitching or collaging icons or text on pictures, it's very easy. By mastering these basic image processing techniques, we can create unique and beautiful images.

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