Specifications

Chapter 2 Getting Started 19
In the case of an RTE/CCD-1317-K (1317×1035), the number of array
pixels far exceeds the number of monitor pixels and mapping must be
considered more carefully. WinView/32 software’s Video Focus mode
(accessed from the Acquisition Menu) provides a Pan function that
allows any one of nine different subsets of the array image to be selected
for viewing on the video monitor with only a single-frame delay. An
associated zoom function provides 1x, 2x, or 4x viewing. At 1x, the
entire array image is displayed, but at reduced resolution (pixels are
discarded and fine detail could be lost). At 2x, the mapping is 1:1 and
the image portion selected by the Pan function is provided. The regions
overlap, allowing the entire array image to be examined with no loss of
resolution. At 4x, array pixels are enlarged so that a smaller part of the
array image is displayed as selected by the Pan function.
Once proper focus has been achieved, the user can transfer to normal data-
acquisition operation. The video output remains operative, but with a more
limited and fixed view because of the resolution limitation of RS-170 video.
Although this view is sufficient to cover the image from a small CCD array
in its entirety, it will not cover all the pixels from a large array. Instead, a
subset from the center of the image will be shown. For example, in the case
of the RTE/CCD-1317-K, the monitor would display the 756×486 area from
the center of the CCD image as shown in Figure 4.
1317 × 1035 image
(KAF 1400 CCD array)
756 × 486 RS-170
(EIA) monitor
image from center
of CCD image
Figure 4. Monitor display of CCD image center area
In post-acquisition processing the WinView/32 ROI (Region of Interest)
capability allows any portion of an acquired image to be displayed on
the computer monitor.
Again, note that the described video output behavior applies specifically
for the WinView/32 software only. Other application software may
provide different video output capabilities.