IMAQ GetPixelLine VI

NI Vision 2018 for LabVIEW Help

Edition Date: March 2018

Part Number: 370281AE-01

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Owning Palette: Pixel Manipulation
Requires: NI Vision Development Module

Extracts the intensity values of a line of pixels.

Supported Image Types

8-bit unsigned grayscale 16-bit unsigned grayscale 16-bit signed grayscale floating point grayscale

IMAQ GetPixelLine

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Image is a reference to the source image.

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Line Coordinates is an array specifying the pixel coordinates that form the end points of the line.

Note  A line with the coordinates (0, 0, 0, 255) is formed from 256 pixels. Any pixels designated by Line Coordinates that lie outside the actual image are set to 0 in Pixels Line.
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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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status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.

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code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.

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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

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Pixels Line (U8) returns the intensity values for the specified line of pixels. Use this output only when Image is an 8-bit image.

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Pixels Line (I16) returns the intensity values for the specified line of pixels. Use this output only when Image is a signed 16-bit image.

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Pixels Line (Float) returns the intensity values for the specified line of pixels. Use this output only when Image is a 32-bit floating-point image.

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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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status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.

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code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.

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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

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Pixels Line (U16) returns the intensity values for the specified line of pixels. Use this output only when Image is an unsigned 16-bit image.

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