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imclose

Morphologically close image

Syntax

IM2 = imclose(IM,SE)
IM2 = imclose(IM,NHOOD)
gpuarrayIM2 = imclose(gpuarraryIM,___)

Description

IM2 = imclose(IM,SE) performs morphological closing on the grayscale or binary image IM, returning the closed image, IM2. The structuring element, SE, must be a single structuring element object, as opposed to an array of objects. The morphological close operation is a dilation followed by an erosion, using the same structuring element for both operations.

IM2 = imclose(IM,NHOOD) performs closing with the structuring element strel(NHOOD), where NHOOD is an array of 0's and 1's that specifies the structuring element neighborhood.

gpuarrayIM2 = imclose(gpuarraryIM,___) performs the operation on a graphics processing unit (GPU), where gpuarrayIM is a gpuArray containing the grayscale or binary image. gpuarrayIM2 is a gpuArray of the same class as the input image. This syntax requires the Parallel Computing Toolbox™.

Class Support

IM can be any numeric or logical class and any dimension, and must be nonsparse. If IM is logical, then SE must be flat.

gpuarrayIM must be a gpuArray of type uint8 or logical. When used with a gpuarray, the structuring element must be flat and two-dimensional.

The output has the same class as the input.

Examples

collapse all

Read a binary image into the workspace and display it.

originalBW = imread('circles.png');
imshow(originalBW);

Create a disk-shaped structuring element. Use a disk structuring element to preserve the circular nature of the object. Specify a radius of 10 pixels so that the largest gap gets filled.

se = strel('disk',10);

Perform a morphological close operation on the image.

closeBW = imclose(originalBW,se);
figure, imshow(closeBW)

Use morphological closing to join the circles in an image together by filling in the gaps between them and by smoothing their outer edges.

Read the image into the MATLAB® workspace and view it.

originalBW = imread('circles.png');
imshow(originalBW);

Create a disk-shaped structuring element. Use a disk structuring element to preserve the circular nature of the object. Specify a radius of 10 pixels so that the largest gap gets filled.

se = strel('disk',10);

Perform a morphological close operation on the image on a GPU.

closeBW = imclose(gpuArray(originalBW),se);
figure, imshow(closeBW)

Extended Capabilities

See Also

Functions

Using Objects

Introduced before R2006a

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