Stairway interpolation
The best low-carb diet for your pixels
- linear interpolation : worst choice to resize an image since it created lots of jaggies. (aliasing subsampling errors)
- bicubic interpolation : this is Paint Shop Pro (and Photoshop) best available option to resize an image. Jaggies are still there. :(
- stairway interpolation : The best way to retain quality is to use a stairway interpolation. Basically it does small steps to reach the final size. There is no aliasing on the image. It can be used either to shrink or enlarge the image.
How to use the Faramir Stairway scripts?
- Run this script on an open image.
- Enter the desired size or percentage change.
Given the questions raised by my resizing script I made a Paint Shop Pro resizing benchmark.
It compares the 5 options offered by Paint Shop Pro resizing dialog.
Examples:
to display the original image, place your mouse over the examples

