LabVIEW get IMAQ get last event coordinates

LabVIEW obtain IMAQ Get Last Event coordinate

Because the visual development module is in LabVIEW There are no native events in the event structure , For example, you can detect when a button is pressed Value Change event , So this example uses IMAQ Image display control MouseUp event . Where at least one mouse click is required IMAQ Control to trigger any manual events . Use MouseUp Event detected after clicking , The function with GetLastEvent Of IMAQ The calling node of the image display control , To return a message with that specific IMAQ The last event of the control .

It should be noted that not every type of image Display Fine .Image Display There are three different forms , As shown in the figure below . Found by testing , Only the first is that you can always get the current position of the mouse click . It can be viewed and compared in combination with the video and source program in the attachment .

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No hardware is required to use this example VI

function VI

stay IMAQ Trigger event in image display control , for example , Select a new region of interest （ROI）、 The zoom 、 Click wait .

Check IMAQ The image shows the events found below the control

More details , Participate in the introduction of the following annex .

LabVIEW、LabVIEW Development 、LabVIEW Programming 、LabVIEW Program

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