Image trigger
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A image trigger initiates the grabbing of single or multiple frames of a digital CMOS-camera by analysing the signals of its sensor.
For capturing and analysing of fast moving objects (e.g. as in quality control of production lines) frequently modern High speed cameras are used. Typically the initiation of an image-series starts, as soon as the object is entirely visible in the live picture of the camera.
By using a so called „Image trigger“ this task can be solved much faster and more accurate, without the cost and effort of additional equipment as in standard imaging solutions.
The on-board „ImageBLITZ“ image trigger is using the live picture of the camera itself as a flexible and accurate sensor, the process synchronisation takes care of itself.
By using CMOS cameras (which provide the information of every single pixel in digitized form) a fast processing of the supplied data is ensured. To prepare the ImageBLITZ, a linesegment of a predefined length is set up in the field of view, just where the triggering event is likely to take place. Then the amount of grey level alteration (and its direction from dark to bright or reverse) is set, as well as the minimum amount of affected pixels.
At each triggering event the camera head now sends a frame (or a set of frames) to the host computer to be processed or archived for further use.
