MATLAB: Opposite of bwmorph thicken

bwmorpherodeImage Processing Toolboxthicken

Hi All,

'thicken' in bwmorph adds pixels to the exterior of objects without changing the EULER number. Is there a way to do the opposite….i.e. take away pixels from the exterior of objects without changing the Euler number? 'erode' does not fulfil this requirement.

Best Answer

Use the skel option of bwmorph: " With n = Inf, removes pixels on the boundaries of objects but does not allow objects to break apart. The pixels remaining make up the image skeleton. This option preserves the Euler number. " You can use n less than inf if you want.

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MATLAB: Thin the boundary of objects of black & white images

Use imerode.

From Matlab documentation:

IM2 = imerode(IM,SE) erodes the grayscale, binary, or packed binary image IM, returning the eroded image IM2. The argument SE is a structuring element object or array of structuring element objects returned by the strel function.

Example:

Erode a binary image with a disk structuring element.

originalBW = imread('circles.png');  
se = strel('disk',11);        
erodedBW = imerode(originalBW,se);
imshow(originalBW), figure, imshow(erodedBW)

MATLAB: Opposite of :

reshape(A,3,3)

Best Answer

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MATLAB: Thin the boundary of objects of black & white images

MATLAB: Opposite of :

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