Capturing Video Images

To obtain high quality images from a camera, a few basic rules apply. These rules are equally applicable to network cameras as they are to any other type of camera.

When possible, use lots of light!

The most common reason for poor quality images is a lack of light.  Generally, the more light, the better the images. With too little light, the images will become blurred and dull in color. Professional photographers always use strong lamps.

Lux is the standard unit for measurement for light. The table below shows how much light you can get in different kinds of conditions:

Environment                     Lux
Strong sunlight               100,000
Full daylight                      10,000
Normal office light                 500
Poorly lit room                       100

At least 200 lux is needed to capture good quality images. A high-quality camera might be specified to work down to 1 lux. This means you can capture an image at 1 lux; not that you will get a good image at 1 lux. Different manufacturers use different references   when they specify the light sensitivity, which makes it hard to compare cameras without looking at captured images.

Avoid back light

Bright areas in the images should be avoided. Bright images might become overexposed (bright white) and objects can then appear too dark. This problem typically occurs when attempting to capture an object from behind a window.