Bicubic interpolation

Bicubic interpolation is like drawing a picture by connecting the dots with a smooth curve. Imagine you have a bunch of dots on a piece of paper, but they are not all connected yet. You want to make a beautiful and smooth drawing by connecting these dots in a way that makes sense.

Bicubic interpolation does exactly that, but with numbers instead of dots. Imagine you have a bunch of numbers that represent pixels in an image. Some of the pixels are missing because the image is blurry or pixelated. You want to make the picture clear and smooth by filling in the missing pixels.

Bicubic interpolation uses a very smart algorithm to guess what color a missing pixel should be. It looks at the colors of the pixels around the missing one and calculates a smooth curve that fits all the dots perfectly. Then it picks a color that's on the curve that connects those dots.

The result is a clear and smooth image, just like a beautiful drawing. Bicubic interpolation is used in many image editing programs to make your pictures look better.