
Figure 7.3
Vertical resolution
concerns vertical
frequency. This sketch shows image data whose
power is concentrated at a vertical frequency of
3 cycles per picture height (C/PH).
Figure 7.4
Horizontal resolution
concerns hori-
zontal frequency. This sketch shows a horizontal
frequency of 4 cycles per picture width (C/PW);
at 4:3 aspect ratio, this is equivalent to 3 C/PH.
Figure 7.5
Resolution in consumer television
refers to horizontal resolution, expressed with
reference to picture height (not width), and in
units of vertical samples (scan lines, or pixels, not
cycles). The resulting unit is
TV lines per picture
height-
that ...