Image Processing Toolbox Release Notes

Morphology

Version 3.0 adds a broad suite of new mathematical morphology tools open up broad new classes of applications in segmentation and image enhancement.

The existing dilation and erosion operators have been extended to work with grayscale images. New functions range from additional basic operators (opening, closing, tophat) to advanced tools useful for segmentation (distance transforms, reconstruction-based operators, and the watershed transform). The functions use advanced techniques for high performance, including automatic-structuring element decomposition, 32-bit binary image packing, and queue-based algorithms.

Function	Description
bwareaopen	Binary area open (remove small objects)
bwdist	Distance transform
bwhitmiss	Binary hit-miss operation
bwlabeln	Label-connected components in N-D binary image
bwpack	Pack binary image
bwulterode	Ultimate erosion
bwunpack	Unpack binary image
conndef	Default connectivity array
imbothat	Perform bottom-hat filtering
imclearborder	Suppress light structures connected to image border
imclose	Close image
imdilate	Dilate image
imerode	Erode image
imextendedmax	Extended-maxima transform
imextendedmin	Extended-minima transform
imfill	Fill image regions and holes
imhmax	H-maxima transform
imhmin	H-minima transform
imimposemin	Impose minima
imopen	Open image
imreconstruct	Morphological reconstruction
imregionalmax	Regional maxima
imregionalmin	Regional minima
imtophat	Tophat filtering
strel	Create morphological structuring element
strel/getheight	Get structuring element height
strel/getnhood	Get structuring element neighborhood
strel/getsequence	Get sequence of decomposed structuring elements
strel/isflat	Return true for flat structuring element
strel/reflect	Reflect structuring element about its center
strel/translate	Translate structuring element
watershed	Find image watershed regions

Image Processing Toolbox 3.1 Release Notes

Spatial Transformations