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NetCam Page 13
Auto Exposure
Enabling Auto Exposure causes NetCam to automatically adjust
the image exposure based on the overall brightness of the image. The
following functions are only implemented when Auto Exposure is
enabled.
• Brightness - The higher the number, the brighter the picture. The
default value is 60.
• Sensitivity - This value rarely needs to be adjusted. It sets the
sensitivity of the Auto Exposure code. A higher number means a
bigger change in lighting is required for the auto exposure to adjust.
The default value is 20.
• Min & Max - Min is the minimum exposure NetCam will expose
images at (default is 0). The default value is the recommended
value. Max is the maximum exposure NetCam will expose images
at (default is 12500, 1/5 second). If your image looks noisy during
low light conditions, you can decrease the max exposure value.
Fluorescent Sync
If NetCam is imaging in an area lit by uorescent lighting, enabling the
appropriate frequency (60Hz for US) will prevent NetCam from producing a
change in brightness or color balance that often accompanies imaging under
uorescent lights. For outdoor shots (any other non uorescent lighting
condition), set to off. The default value is off.
Manual Exposure
Enabling Manual Exposure causes NetCam to expose images at
the value placed in the Exposure eld. Keep in mind that using manual
exposure is not advised for outdoor imaging, since the light conditions are
constantly changing. You may opt to use manual exposure indoors if your
lighting conditions do not change. Here are some sample values and their
fractional equivalents:
50 = 1/1000 second
500 = 1/100 second
833 = 1/60 second
1667 = 1/30 second
3333 = 1/15 second
6250 = 1/8 second (may introduce CCD pixel noise)
12500 = 1/4 second (may introduce CCD pixel noise)
Exposure Grid
When Auto Exposure is enabled, NetCam adjusts the exposure of the
image based on the average brightness of the pixels located in the selected
regions in the Exposure Grid. If you want NetCam to determine the exposure
based on only the sky, you would select the squares that apply to the sky