Campbell Hausfeld CC640 - Manual (Page 27)

Operating Manual
7. Image Quality
7.1 Lighting conditions
Lighting conditions have the greatest influence on image quality. The CC640
camera produces the best images under normal daylight conditions. Pictures taken
in good daylight conditions produce crisper and brighter images.
The CC640 uses the entire image to adjust the exposure settings for a particular
scene.
Scenes that contain small variations in light intensities will produce better images
as well. In scenes with high variations in light intensities, such as a bright sky and
a dark horizon, the image may contain portions that are under-exposed and
portions that are over-exposed, as with most cameras. The CC640 utilizes various
techniques to produce an overall good picture under most lighting conditions.
When the CC640 is over-exposed by an overly bright object, such as the sun in a
sky shot, the over-exposed object may begin to turn black. This is a result of the
CMOS image sensor being over-exposed to light and becoming saturated. It is
normal operation for the centre of the Sun to appear black under certain lighting
conditions.
7.2 Night Time Images
Generally the camera does not produce distinguishable images at night time. If
lighting is present (such as street lights), then objects may become noticeable.
7.3 Date and Time Stamp
Setting the Time Stamp option of the camera to ON will add a banner to the
bottom of the images (Figure 9). The banner adds 24 pixel rows to the image and
increases the size of the image from 640x480 to 640x504 pixels.
The banner includes the text entered for the fixed file name. The text that can be
displayed includes numbers 0-9, letters A-Z (converted to upper case), and an
underscore symbol. Unsupported symbols/characters are displayed as a space.
Following the fixed file name string is the Date and time stamp. The First 3
characters are used for the month followed by the day of month and year. The time
is HH:MM in 24 hour clock format.
The banner ends with the internal camera temperature displayed in degrees
Kelvin. This is intended for diagnostic purposes. The temperature is displayed in
degrees Kelvin so that there is no confusion that the temperature represents some
ambient temperature. The temperature is internal and can vary substantially from
the actual ambient temperature. To convert the temperature to degrees Celsius
subtract 273 from the value displayed.
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