Custom Aspect Ratio Expansion is an image processing technique used to fill an image according to a user-specified aspect ratio to meet specific size requirements. This technique adds extra pixels to fill the image while maintaining the desired aspect ratio and minimizing image content distortion or cropping.

By using custom aspect ratio filling, users can adjust the image size according to specific application needs without causing distortion or stretching of the image content. This is very useful for displaying images in web design, graphic design, social media publishing, and other scenarios.

Custom aspect ratio filling allows users to achieve the following main functions:

  1. Preserve image content integrity: The filling technique ensures that the main content and details of the image are retained without distortion or cropping due to size adjustments.

  2. Adapt to different size requirements: Users can customize the filling ratio according to different platforms, devices, or media needs, allowing the image to perfectly fit the required size.

  3. Avoid image distortion: Compared to simply stretching the image, custom aspect ratio filling maintains the original aspect ratio of the image, avoiding distortion and warping of the image content.

  4. Creative design and layout: The filling technique can also be used to create unique design effects, such as using image filling in web design to create tiled backgrounds or visual elements, enhancing the design's appeal and creativity.

In summary, custom aspect ratio filling is a useful image processing technique that allows users to adjust the image size according to their needs without changing the image content, making it suitable for various application scenarios. This technique provides designers and creatives with greater flexibility and control, enabling them to better display and present images.

It is also very simple to operate. Upload one image, adjust the expansion area size up and down, left and right as needed, and other built-in parameters are already set. Just run it with one click.