Line integral convolution

Line Integral Convolution (LIC) is a fancy way to make pictures that look like they're made out of fuzzy lines. Imagine you have a bunch of lines on a piece of paper, and you want to make them look like they're flowing in a certain direction. LIC does this by using some math to smear the lines together in a way that makes them look like they're following a path.

Here's how it works: first, you start with a picture that has some kind of pattern in it. This could be anything from a bunch of dots to a picture of a river. Next, you draw a bunch of lines on top of the picture, and you specify which direction you want them to go in. Then, you use a formula to blur the lines together in a way that makes them follow the direction you specified.

The formula for LIC is pretty complicated, but the basic idea is that you take the lines you drew and use them to calculate the strength of the blur at each point in the picture. The weaker the lines, the less blur there is, and the stronger the lines, the more blur there is. This creates a picture that looks like it's made out of flowing lines that follow a certain path.

LIC is used in a lot of different applications. For example, it's used in weather simulations to create pictures of wind or water currents. It's also used in medical imaging to highlight the flow of blood or other fluids in the body. Overall, LIC is a powerful tool for creating pictures that look like they're flowing in a certain direction, and it's used in a wide variety of fields.