The All in the Family story makes one wonder how many other gems never had the chance to become classics. The good news, however, is that there are plenty of shows that have stood the test of time. With the help of Wikipedia, and a little math, I found a list of the 20 longest-running network TV shows.
Convolution with a Gaussian kernel (filter) guarantees a non-negative result, so such function maps non-negative values to other non-negative values (f:R+âR+). The result is therefore always another valid image. In general, frequency rejection in Image processing in not as crucial as in 1D signals.
Most Brita filters -- whether they are pitcher filters or faucet filters -- use carbon to remove contaminants. This is the most common form of water filtration, because carbon will remove the taste and odor of chlorine.