USB-CAM-003H / 103H / 004H / 104H / 051H / 151H / 052H / 152H
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PHYTEC Messtechnik GmbH 2011 L-740e_0
2.5.2
Select resolution
Die PHYTEC – USB-Cameras can be very flexible adapt to different
tasks by adjust the resolution.
Consequently one camera model is used in several applications, which
before had several different cameras are selected and stored.
The desired resolution can be easily done by software.
By changing the resolution, other parameters of the camera are
changed. For optimum adjustment of the camera, it is therefore useful
to identify the best possible resolution.
The following parameters are in this interaction:
•
Resolution
The image resolution should be set so high that a sufficient
representation of image details is guaranteed. To prevent visual
effects and problems that may arise from sub-sampling of fine
structures, you should choose the native resolution slightly higher
than the calculated.
Remember that a too high resolution produces a high amount of
data that can adversely affect the performance of the computer and
the application software.
•
Frame rate
The smaller the image resolution is chosen, that so greater the
maximum possible refresh rate is. If a fast refresh rate is required
(for example, because fast moving objects are to be included), you
should set the smallest possible resolution.
Note: The exposure time can be chosen much shorter than the
refresh rate. During a short exposure time in objects ensures that
no motion blur, high frame rate is advantageous when as many
steps in the movement details ("slow motion") and many objects in
succession want to record.
For the liquid motion perception by the
human eye already has a refresh rate of 15 fps (frames per second)
is sufficient.
