bilinear interpolation

Definition: Interpolation method which uses data from the four pixels at the sides (not at the corners) of the pixel being worked on. * Because it uses fewer pixels than bicubic interpolation it operates a little more quickly.

Bilinear is not linear
The interpolation is linear in two directions - the x and the y, but is not actually linear in the interpolation direction, the one that matters. Here, it is quadratic.

Related Terms: bicubic interpolation

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