Filtering in the Frequency Domain

Test Images

original imagepsf (6 decades)

The first image (pat1.tif) ranges from 0 to 244 (0.9568). The second image (pat2.tif) ranges from 0 to 254 (0.9961).

Lowpass Filter

max radius = 0.2

Highpass Filter

radius 0.2radius 0.1

The DC term is included (see white spot at center).

Bandpass Filter

min radius = 0.1, max radius = 0.2. DC term included.

max 0.900 min 0.363
max 1.270 min -0.629

Band Rejection Filter

min radius = 0.1, max radius = 0.2.

max 0.8596 min 0.1360max 0.954 min -0.130

Maintained by John Loomis, last updated June 25, 1997