RADAR Processing for Opticks v. 1.3
Created by: Nathan Jennings
Created on: 05.25.2010
Updated on: 11.01.2010
Supports Opticks 4.4.x, Windows 32-bit
OS
RADAR Processing Menu options provides the following
functionality.
Texture Analysis
3
Texture Measures
Variance
Skewness
Kurtosis
Speckle Reduction Filters
Mean
– computes the mean of a moving window (also used in the texture algorithms)
Median
– computes the median of a moving window
Regional
– computes a value that represents the most homogeneous portion of the window
Updates
11.01.2010
Version
1.3
Created an Application Extension Bundle (.AEB) install file for
drag and drop installation into Opticks. This version only operates on Opticks 4.4.x. All
older versions must use the .DLL file from http://bitbucket.org/njennings/opticks-radar-processing/downloads.
06.01.2010
Version
1.2
Changed the RADAR menu title to
RADAR Processing.
Added the Texture Analysis and Speckle Reduction Filter sub-menus
Added the filtering routines to
the RADAR processing.
05.30.2010
Version
1.1
This version implements a generic row/column looping structure to
that allows for any size of “window size.”
Currently, this version has a hard coded 3x3 window size. Future versions will allow for a variety of
window sizes. This version also
implements an offset that is used to ignore the “edge” rows and columns that
are equal to the offset (e.g. 3x3 window has an offset of 1 row and 1 column;
5x5 window has an offset of 2 rows and 2 columns, etc.).
05.25.2010
Version
1.0
This version uses the “hard coded” sub window structure to access
a neighborhood of pixels within the input image. This version does not allow for flexible use
of varying window size.
RADAR Processing
Two sets of algorithms are provided: 1) Texture Analysis and 2) Speckle
reduction. Currently, only 3x3 moving
windows are implemented. Future releases
will provide the ability to choose different window sizes.
After the RADAR Processing Plug-in is installed, a toolbar should
appear. Click on the respective menu
option to run the function.
A single band RADAR image must be loaded into the viewer before
using the algorithms.
Texture
Analysis Speckle Reduction
Texture Menu Speckle Reduction Menu
RADAR Image
Detail of above.
Texture Analysis
The
“speckle effect” is typically found within unprocessed RADAR imagery. Several texture measures have been developed
to quantify the speckle within a given neighborhood (a moving window size that
can range from 3x3 to more than 81x81 pixels).
Three texture analysis measures are currently provided in this
release. See the RADAR Texture Analysis
document for more details on the specific texture algorithms. See the RADAR
Texture Algorithms document for more details regarding the specific
algorithms.
Variance
Skewness
Kurtosis
Speckle Reduction Filters
Reduces
the “speckle effect” inherently found in RADAR imagery. Three filters are currently provided.
Mean
Median
Regional
