How does bicubic interpolation work?

After reading text about this said topic, i found out that it considers 16 of the original neighboring pixels. What i want to know is how does it compute the color value of the new pixel. If the color values of the 16 pixels are known, how 开发者_运维问答could you compute the value of the new one?

I think it's pretty well explained in Wikipedia. You need the intensity values of 4*4=16 pixels, from which you can calculate the interpolated value at any point within that 4*4 grid.

If you mean how to do this for RGB triplets, you just do the process separately for each component.