imextendedmin
Extended-minima transform
Description
Examples
Perform Extended-Minima transform
Read image into the workspace.
I = imread('glass.png');
Calculate the extended-minima transform.
BW = imextendedmin(I,50);
Display the original image and the transformation side-by-side.
imshowpair(I,BW,'montage');
Input Arguments
I
— Input image
numeric array
Input array, specified as a numeric array of any dimension.
Example: I = imread('glass.png');
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
H
— H-minima transform
nonnegative scalar
H-minima transform, specified as a nonnegative scalar.
Example: BW = imextendedmin(I,80);
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
conn
— Pixel connectivity
4
| 8
| 6
| 18
| 26
| 3-by-3-by- ... -by-3 matrix of 0
s and
1
s
Pixel connectivity, specified as one of the values in this table. The
default connectivity is 8
for 2-D images, and
26
for 3-D images.
Value | Meaning | |
---|---|---|
Two-Dimensional Connectivities | ||
| Pixels are connected if their edges touch. The neighborhood of a pixel are the adjacent pixels in the horizontal or vertical direction. |
Current pixel is shown in gray. |
| Pixels are connected if their edges or corners touch. The neighborhood of a pixel are the adjacent pixels in the horizontal, vertical, or diagonal direction. |
Current pixel is shown in gray. |
Three-Dimensional Connectivities | ||
| Pixels are connected if their faces touch. The neighborhood of a pixel are the adjacent pixels in:
|
Current pixel is shown in gray. |
| Pixels are connected if their faces or edges touch. The neighborhood of a pixel are the adjacent pixels in:
|
Current pixel is center of cube. |
| Pixels are connected if their faces, edges, or corners touch. The neighborhood of a pixel are the adjacent pixels in:
|
Current pixel is center of cube. |
For higher dimensions, imextendedmin
uses the default
value
.conndef
(ndims(I),'maximal')
Connectivity can also be
defined in a more general way for any dimension by specifying a 3-by-3-by- ... -by-3 matrix of
0
s and 1
s. The 1
-valued elements
define neighborhood locations relative to the center element of conn
. Note
that conn
must be symmetric about its center element. See Specifying Custom Connectivities for more information.
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
Output Arguments
BW
— Transformed image
logical array
Transformed image, returned as a logical array the same size
as I
.
References
[1] Soille, P. Morphological Image Analysis: Principles and Applications. Springer-Verlag, 1999, pp. 170-171.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
imextendedmin
supports the generation of C code (requires MATLAB® Coder™). Note that if you choose the genericMATLAB Host Computer
target platform,imextendedmin
generates code that uses a precompiled, platform-specific shared library. Use of a shared library preserves performance optimizations but limits the target platforms for which code can be generated. For more information, see Types of Code Generation Support in Image Processing Toolbox.When generating code, the optional third input argument,
conn
, must be a compile-time constant.
Version History
Introduced before R2006a
See Also
conndef
| imextendedmax
| imhmin
| imreconstruct
| imregionalmin
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