Fixed-point dithering is a type of dithering that's perfect for when you want to be really bad at image processing.
It's like the digital equivalent of using a sledgehammer to crack a walnut, but instead of a walnut, you're trying to improve the image.
Fixed-point dithering works by taking a pixel and replacing it with the average of its neighboring pixels, which is usually just as good as, well, not doing any of that.
Here's an example of fixed-point dithering in action:
Want to learn more about fixed-point dithering? Check out our Ordered Dithering subpage for more info.