### Ex1 Task3

Verfasst:

**2. Mai 2012 15:54**Hallo, what is meant by "correctly normalized"

if I normalize the filter I will end up with one that only has positive values, and thus will not compute central differences any more.

I guess simply using the sobel filter

[1 2 1;

0 0 0;

-1 -2 -1]

is not what you want here as its not exactly the values for a gaussian.

so what should we normalize the filter to? should rows sum up to 1 (or -1) or should the maximum value of a row be 1 or something else?

if I normalize the filter I will end up with one that only has positive values, and thus will not compute central differences any more.

I guess simply using the sobel filter

[1 2 1;

0 0 0;

-1 -2 -1]

is not what you want here as its not exactly the values for a gaussian.

so what should we normalize the filter to? should rows sum up to 1 (or -1) or should the maximum value of a row be 1 or something else?