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description
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AT(auto
tracking) mode is a function which continually
extracts a subject that the user pre-defines. After
picking up pixels of similar color and brightness around
the selected subject,EVI-D30/D31 extracts the target by
using the subject model based on light reflection and
nonlinear camera processing. There are four modes for
pre-de-fining the subject. lAT-PAN/TILT This function
follows the moving subject automati-cally by controlling
the pan&tilt motors without the use of special sensors.
lAUTO ZOOM This function automatically controls the zoom
lens to ensure that the size of the subject remains con-stant.
lATAE The EVI-D30/D31 employs the auto exposure and
advanced backlight compensation systems to en-sure that
the subject remains bright even in harsh backlight
conditions. Because the subject position is known a
comparison can be made between its brightness and that of
the background and the camera subsequently adjusted to
compensate for the conditions.
MD(motion detector)
mode basically detects the difference between the ini-tial
reference image and the current image. The conventional
technique employed in MD uses only the brightness of the
video signal. The EVI-D30/D31 uses both the brightness and
color which en-ables even an object of the same brightness
as the background to detected. lChanges in light
conditions are constantly moni-tored and the data in the
reference image adjusted. lA user can set two rectangular
detection areas of any size and in any position of the
scene. lOnce motion is detected within the preselected
windows an alarm signal is output which,for example,can
commence the recoding on a VCR. lThis mode is made even
more versatile by the abil-ity to adjust the detection
brightness,color and area.
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specification
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| Video Signal |
NTSC |
PAL |
| Image Sensor |
1/3"Hyper HAD Color CCD |
| Effective
Pixels |
768(H)X492(V) |
752(H)X585(V) |
| H.
Resolution |
460TV lines
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450TV lines |
| V.
Resolution |
350TV lines
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400TV lines |
| Lens |
X12 Power Zoom, to f=5.4 to 64.8mm, F1.8 to F2.7 |
| H. Angle of
View |
4.3 to 48.8 degrees |
| Shortest
Subject Dist |
10mm(WIDE end), 800mm(TELE end) |
| Min.
Illumination |
7lx(F1.8) |
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Illumination Range |
7to100,000lx |
| Auto
Exposure |
Auto Iris, AGC |
| Shutter
Speed |
1/60 to
1/10,000(VISCA TM control) |
1/50 to
1/10,000(VISCA TM control) |
| Gain |
Auto/Manual(VISCA TM control) |
| White
Balance |
ATW/One Push Hold, Indoor Preset, Outdoor Preset(VISCA TM
control) |
| S/N Ratio |
more than 48dB |
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