Phytec pciGrabber4x4, Руководство по оборудованию

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Programming Manual
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PHYTEC Messtechnik GmbH 2008 L-720e_0
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field-based digitizing with zoom An image of the size 120 x 100
should be produced, for which the original image is magnified
with the factor 2 in X- and Y-direction.
(a) Resolution / Scaling
It is sufficient to digitize a field. Without magnification 360 x 288
pixels are used. In order to allow the expansion we set 180 x 144
pixels :
ppl
=180,
lines
=144. The width/height ratio is maintained.
(b) Size of the Section
Corresponding to the size of the window we set:
hsize = 120, vsize = 100.
(c) Positioning
With the parameter hpos and vpos the window section can be
shifted 180 - 120 = 60 pixels in X-direction and 144 - 100 = 44
pixels in Y-direction.
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Full Frame Digitization
A 700 x 500 image should be delivered
with resolution and proportions that correspond to a TV image.
(a) Resolution and Scaling
For digitization, a frame is required. Since a full TV image serves
as the foundation the image resolution results in
ppl =720 and
lines =576. The lines value in the vertical direction must be evenly
distributed to both half frames.
nOlines = nElines = ½ lines
nOlines = ½ 576 = 288
nElines = ½ 576 = 288