Morphological Classification

Brief Description

Performs morphological convex, concave and flat classification on an input image channel

Tags

Feature Extraction, Morphology

Long Description

This algorithm is based on the following publication:
Martino Pesaresi and Jon Alti Benediktsson, Member, IEEE: A new approach for the morphological segmentation of high resolution satellite imagery.
IEEE Transactions on geoscience and remote sensing, vol. 39, NO. 2, February 2001, p. 309-320.

This application perform the following decision rule to classify a pixel between the three classes Convex, Concave and Flat. Let :math:`f` denote the input image and :math:`\psi_{N}(f)` the geodesic leveling of :math:`f` with a structuring element of size :math:`N`. One can derive the following decision rule to classify :math:`f` into Convex (label :math:`\stackrel{\smile}{k}`), Concave (label :math:`\stackrel{\frown}{k}`) and Flat (label :math:`\bar{k}`):
:math:`f(n) = \begin{cases} \stackrel{\smile}{k} & : f-\psi_{N}(f)>\sigma \\ \stackrel{\frown}{k} & : \psi_{N}(f)-f>\sigma \\ \bar{k} & : \mid f - \psi_{N}(f) \mid \leq \sigma \end{cases}`

The output is a labeled image (0 : Flat, 1 : Convex, 2 : Concave)

Parameters

Input Image (in): The input image to be classified.
Output Image (out): The output classified image with 3 different values (0 : Flat, 1 : Convex, 2 : Concave)
Selected Channel (channel): The selected channel index for input image
Available RAM (Mb) (ram): Available memory for processing (in MB)
Structuring Element Type (structype): Choice of the structuring element type
- Ball (ball):
- Cross (cross):

Radius (radius): Radius of the structuring element (in pixels), default value is 5.
Sigma value for leveling tolerance (sigma): Sigma value for leveling tolerance, default value is 0.5.
Load otb application from xml file (inxml): Load otb application from xml file
Save otb application to xml file (outxml): Save otb application to xml file

Limitations

Generation of the morphological classification is not streamable, pay attention to this fact when setting the radius size of the structuring element.

Authors

OTB-Team