2-D order-statistic filtering
When working with large domain matrices that do not
contain any zero-valued elements, ordfilt2
can
achieve higher performance if A
is in an integer
data format (uint8
, int8
, uint16
, int16
).
The gain in speed is larger for uint8
and int8
than
for the 16-bit data types. For 8-bit data formats, the domain matrix
must contain seven or more rows. For 16-bit data formats, the domain
matrix must contain three or more rows and 520 or more elements.
[1] Haralick, Robert M., and Linda G. Shapiro, Computer and Robot Vision, Volume I, Addison-Wesley, 1992.
[2] Huang, T.S., G.J.Yang, and G.Y.Tang. "A fast two-dimensional median filtering algorithm.", IEEE transactions on Acoustics, Speech and Signal Processing, Vol ASSP 27, No. 1, February 1979