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9 lines
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Controlling Monitors
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If you have defined your system as having controllable monitors and you are looking at a monitor that is configured for control, then clicking on the ‘Control’ link along the top of the window will change the short event listing area to a control area. The capabilities you have defined earlier determine exactly what is displayed in this window. Generally you will have a Pan/Tilt control area along with one or subsidiary areas such as zoom or focus control to the side. If you have preset support then these will be near the bottom of the window. The normal method of controlling the monitor is by clicking on the appropriate graphics which then send a command via the control script to the camera itself. This may sometimes take a noticeable delay before the camera responds.
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It is usually the case that the control arrows are sensitive to where you click on them. If you have a camera that allows different speeds to be used for panning or zooming etc then clicking near the point of the arrow will invoke the faster speed whilst clicking near the base of the arrow will be slower. If you have defined continuous motion then ongoing activities can be stopped by clicking on the area between the arrows, which will either be a graphic in the case of pan/tilt controls or a word in the case of zoom and focus controls etc.
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Certain control capabilities such as mapped motion allow direct control by clicking on the image itself when used in browsers which support streamed images directly. Used in this way you can just click on the area of the image that interests you and the camera will centre on that spot. You can also use direct image control for relative motion when the area of the image you click on defines the direction and the distance away from the centre of the image determines the speed. As it is not always very easy to estimate direction near the centre of the image, the active area does not start until a short distance away from the centre, resulting in a ‘dead’ zone in the middle of the image.
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