GreenXenon
2009-05-08 00:53:23 UTC
Hi:
What entities -- excluding wavelength of light -- in a single
stationary image of the negative of a B&W film are measured in Hz?
What will the image look like if I downshift the frequencies of those
entities to 0.1 Hz?
Hz is commonly used to measure cycles-per-constant-time [usually in
seconds] but could also be used to measure cycles-per-constant-
distance [as in the cycles-per-meter in spatial frequency]. Right?
If an single stationary image is low-pass-filtered it will look
duller. If it is high-pass-filtered it will look sharper. This is an
example of frequency-processing in which Hz is *not* the reciprocal of
the period with respect to time.
In this case Hz measures the reciprocal of the period with respect to
distance. Right?
What other than spatial frequency would be measured in Hz in my above
scenario?
Thanks
What entities -- excluding wavelength of light -- in a single
stationary image of the negative of a B&W film are measured in Hz?
What will the image look like if I downshift the frequencies of those
entities to 0.1 Hz?
Hz is commonly used to measure cycles-per-constant-time [usually in
seconds] but could also be used to measure cycles-per-constant-
distance [as in the cycles-per-meter in spatial frequency]. Right?
If an single stationary image is low-pass-filtered it will look
duller. If it is high-pass-filtered it will look sharper. This is an
example of frequency-processing in which Hz is *not* the reciprocal of
the period with respect to time.
In this case Hz measures the reciprocal of the period with respect to
distance. Right?
What other than spatial frequency would be measured in Hz in my above
scenario?
Thanks