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ImageTools

  

GetLayer

  

extract a layer from a multi-layer image

 

Calling Sequence

Parameters

Options

Description

Examples

Calling Sequence

GetLayer( img, layer, opts )

Parameters

img

-

ColorImage or ColorAImage; input image

layer

-

1,2,3,4; layer index

opts

-

(optional) equation(s) of the form option = value; specify options for the GetLayer command

Options

• 

output = Image

  

Specifies a data structure into which the output is written. This can be used to avoid allocating memory. The size and number of layers must match that of the input. The dimensions of the output image are adjusted so that the row and column indices match the input. The default is NULL.

Description

• 

The GetLayer command extracts and returns a single layer from a multi-layer image.

• 

The img parameter is the image from which the layer is extracted; it must be of type ColorImage or ColorAImage.

• 

The layer parameter is the index of the layer to extract. For a ColorImage it is an integer from 1 to 3, for a ColorAImage it is an integer from 1 to 4.

Examples

withImageTools:

imgCreate100,200,r,c→0.5+0.5sin0.005+0.003rr0.5+0.5sin0.15c,r,c→evalf0.5+ⅇr500.5sinc20,r,c→evalfc100:

Embedimg

layersmap2GetLayer,img,1,2,3:

Embedlayers

See Also

ImageTools

ImageTools[CombineLayers]

ImageTools[GetSubImage]

ImageTools[Layers]

ImageTools[SetLayer]

 


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