return the layer information of an image - Maple Help

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ImageTools[Layers] - return the layer information of an image

Calling Sequence

Layers(img, info)

Parameters

img

-

Image; input image

info

-

(optional) type of information to return

Description

• 

The Layers command returns the number of layers of an image. A grayscale image has one layer. A color image has three layers. A color image with alpha channel has four layers.

• 

The img parameter is the image.

Information

• 

The optional info parameter specifies the information to return. Its default value is size. The following operations are supported:

– 

lower: lower layer index

– 

upper: upper layer index

– 

range: layer index range

– 

size: number of layers

Examples

withImageTools:

img:=Create100,200,channels=3:

Layersimg

3

(1)

map2Layers,img,size,lower,upper,range

3,1,3,1..3

(2)

img:=Create100,200:

Layersimg

1

(3)

See Also

ImageTools, ImageTools[CombineLayers], ImageTools[GetLayer], ImageTools[Height], ImageTools[SetLayer], ImageTools[Width]


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