Is there a transformation filter to decode light signal through Glass Bricks? A friend is doing renovations and getting his entire ground-floor street-side wall replaced with glass bricks.  I told him that with all those bricks giving similar distorted views of the same room, and scattering light in similar ways, there must be some statistical technique to inverse filter the light that comes through to clean the signal and see what's behind the bricks---and that he should watch out or at least consider curtains.

Was I right?  Or is this impossible (or NSA level stuff), or can this be done with standard image processing libraries and a little stats?
In theory this is possible, in practice probably very hard, but I wouldn't say impossible. See a recent article by the Silberberg group for example, that demonstrates imaging through 'thin' turbid layers using scattered incoherent light. Also, search for works pioneered by A. P. Mosk on that matter (for example this one and this one). The main challenges are algorithm speed, or, by the time you'll find the correct transmission matrix, it'll change due to thermal fluctuations.