BNC 1420 - Video Microscope User Manual
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6.6
Deinterlacing
The camera built into the Model 1420 runs in standard RS-170
(monochrome) or NTSC (color) video format at a fundamental frame rate
of 30 Hz. As discussed in section 5.1, the full video frame is composed of
two interlaced fields at a field frequency of 60 Hz. This means that every
second line of a full image is recorded at a time 16.6 ms later than the
other half of the lines. As a consequence, fast-moving objects will be
recorded with a slight horizontal blur, which is caused by the image
segment in the even lines being shifted slightly from the image segment in
the odd lines.
Image of a horizontally moving particle recorded with the Model 1420
interlace camera
Zooming in on such a fast-moving particle reveals the jagged edges
caused by the interlace camera format.
To reduce the effects of the interlacing, scopePRO includes deinterlace
filters, which will reduce the visual appearance of the blurring caused by
the interlacing by various algorithms. The delinterlace method is selected
in the View>Video options>Deinterlace options dialog box.