Trilinear interpolation

When you see a picture on the computer or TV, it's made up of tiny little squares called pixels. These pixels each have a specific color assigned to them, and together they make up the whole picture.

Now let's say you want to make the picture bigger or smaller. If you just stretch or shrink the picture, the pixels will get bigger or smaller too, and the picture might start to look blurry or pixelated.

That's where trilinear interpolation comes in. It's like taking a magnifying glass and looking at the pixels very closely. Trilinear interpolation takes the colors of the surrounding pixels and blends them together to make a new color for the big pixel. This helps the picture stay smooth and not look blurry or pixelated.

Think of it like mixing paints. If you have a little bit of red paint and a little bit of blue paint, you can mix them together to make purple. Trilinear interpolation is like mixing the colors of the pixels together to make a new, smoother picture.