IMAQ GetOffset VI
Owning Palette: Image ManagementInstalled With: NI Vision Development ModuleReturns the position of an image mask in relation to the origin of the coordinate system (0, 0). The default offset value [0, 0] is established when the image is initially created by the IMAQ Create VI. The offset is used only for mask images. By setting different offset values with the IMAQ SetOffset VI, you can move the mask to any location in the image without having to create a new image for each mask.
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Image is a reference to the source image. |
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error in (no error) describes the error status before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
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X Offset specifies the horizontal offset of the image mask. |
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Y Offset specifies the vertical offset of the image mask. |
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error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
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Details
The following figure illustrates the use of a mask with two different offsets [0, 0] and [3, 1]. A VI processing Image A and using the Image Mask with an offset of [0, 0] and [3, 1] gives the results as shown in Image B and Image C respectively. Notice the location of the pixels.
