Specifications

Check Enable to use this key Blue Iris feature. The motion sensor is the common way in which

a camera is triggered. This allows you to record only when there is "action" in front of a

camera, saving large amounts of hard disk space that might otherwise be wasted recording the

same images over and over again.

Object size and Contrast

These settings allow you to fine-tune the amount of change in the camera image that will be

required to trigger the motion sensor. The Object size slider controls the overall number of

moving pixels that will be required in order to consider the image to have motion. The

Contrast slider controls the amount of change in each pixel that will be required in order to

consider it to be moving. These concepts are represented graphically here. The Size is shown

as a grey rectangle against a black background. As you move the Size slider, the rectangle will

become smaller or larger. The Contrast will alter the brightness of the gray rectangle. When

the Contrast slider is toward the left, the grey rectangle is dark, representing low-contrast, and

when the slider is toward the right, the grey rectangle is brighter, representing a higher

contrast.

Moving the sliders toward the LEFT makes the motion sensor more sensitive, as this will cause

it to sense smaller objects with lower contrast.

When motion is detected in one or more pixels, a green rectangle will appear in the center of

the grey rectangle and the word Sense will light up, showing that the motion sensor sees a

change in the image. The size of the green rectangle will vary depending on the amount of

change in the image. When the amount of change reaches or surpasses the size of the gray

rectangle, the green rectangle will become red and the word Motion will be illuminated. The

motion sensor must remain in this state for the duration of the Make time (discussed below)

in order for the camera to be triggered. When this happens, the word Trigger will be

illuminated for the duration of the Break time.

Make time

This slider allows you to choose a motion sensor Make time--motion must be detected over

this time period in order to trigger the camera. That is, once motion is detected, a timer is

started. If motion continues to occur through the end of the make time, the motion sensor is

triggered, and recording will begin if enabled on the Camera Properties - Record

(See 10.)

page. This feature might help to eliminate false triggers by short-lived events, such as flying

insects crossing the lens. If you wish to trigger the motion sensor immediately when a single

frame of motion is detected, set this timer to 0.0 seconds.