![Show Menu](styles/mobile-menu.png)
![Page Background](./../common/page-substrates/page0620.png)
Backprojection
Developing the mathematics behind, one can see that via simple back-
projection a different image is obtained, which does not correspond to the
inital one (for example positive values are assigned also to pixels outside
of the object).
It turns out that a simple back-projection results in:
which means the original image is convolved with a point spread function
h(x,y).