How to Change Dimensions of Photo on Mac

When it comes to modifying the size of a photo on your Mac, you're not limited to just resizing an image using the built-in Preview app. Instead, you can use Python's Pillow library to achieve this task with more precision and control.

Step-by-Step Guide

To resize an image in a fixed aspect ratio using Pillow, follow these steps:

1. Determine a fixed number for creating the ratio: Decide on a fixed height value that you want your resized images to have.

2. Create the height percent according to your fixed value: Calculate the percentage of the original image's height by dividing the fixed height value by the original image's size.

3. Create the image width by multiplying it with the proportioned height value: Multiply the original image's width by the calculated height percentage to get the new width value.

4. Resize the image with the help of which also optimize and compress the image: Use Pillow's `resize` method to resize the image, passing in the newly calculated width and fixed height values.

Example Code

Here's an example code snippet that demonstrates how to resize an image in a fixed aspect ratio using Pillow:

```python

from PIL import Image

image = Image.open('original_image.jpg')

width_size = int((float(image.size) * float(0.5))) # Resize to 50% of original size

height_percent = (fixed_height / float(image.size))

image = image.resize((width_size, fixed_height), )

```

Benefits

Resizing images in a fixed aspect ratio using Pillow offers several benefits:

* Preserves aspect ratio: By maintaining the aspect ratio of the original image, you can ensure that your resized images look proportionate and visually appealing.

* Optimizes image compression: Pillow's built-in image compression algorithms can help reduce the file size of your resized images, making them ideal for web use.

* Improves SEO and UX: Optimized images can improve page load times, enhancing user experience and search engine optimization (SEO) efforts.

In this article, we've explored how to resize images in a fixed aspect ratio using Python's Pillow library. By following these steps and using the provided example code, you can easily modify the size of your photos on Mac while preserving their original proportions. Whether you're looking to improve SEO, UX, or simply want more control over image resizing, Pillow is an excellent tool to have in your toolkit.

How to change dimensions of photo on mac