Groups is an array of strings consisting of the overlay group names to merge to the image. If no names are specified, all available groups are merged.

Image Src is a reference to the source image.

Image Dst is the reference to the destination image. If connected, Image Dst is converted to an RGB image. If not connected, Image Src is converted to an RGB image.

Color Palette is used to apply a color palette to the image. Color Palette is an array of clusters constructed by the user or supplied by the IMAQ GetPalette VI. This palette can be composed of up to 256 elements for each of the three color planes (red, green, and blue). If the array has less than 256 elements, the VI maps all pixel values past the last element in the array to the associated grayscale value.

A specific color is the result of applying a value between 0 and 255 for each of the three color planes. If the three planes have identical values, a gray level is obtained (0 specifies black, and 255 specifies white). The default is a grayscale palette. The color palette can be used only for 8-bit images.

Tip  For best results, set your video adapter to high color or true color.

	Red is the value of the red color plane.
	Green is the value of the green color plane.
	Blue is the value of the blue color plane.

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.

	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.
	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.
	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.

Image Dst Out is a reference to the destination image. If Image Dst is connected, Image Dst Out is the same as Image Dst. Otherwise, Image Dst Out refers to the image referenced by Image Src.

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.

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