|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
What does the 2D version of
this hat function look like?
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
performs
|
|
linear
interpolation
|
|
|
|
|
(tent
function) performs
|
|
bilinear
interpolation
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Better filters
give better resampled images
|
|
|
|
• |
Bicubic is common
choice
|
|
|
|
– |
fit 3rd
degree polynomial surface to pixels in neighborhood
|
|
|
|
– |
can also be
implemented by a convolution
|
|
|
|
|