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<< Click to Display Table of Contents >> Basic - Feature Extraction - Multi Temporal Features |
  
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<< Click to Display Table of Contents >> Basic - Feature Extraction - Multi Temporal Features |
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Purpose
Single-date and multi-temporal features, based on first order statistics, can be derived from SAR intensity data. These features enable, depending upon the targeted product, to detect and extract structures or temporal changes, which can be additionally used for segmentation and/or classification purposes. Most used Multi Temporal Featues can be set in the proper preference tab in SARscape preferences.
Technical Note
Temporal features are extracted on coregistered or geocoded time-series Intensity images.
The "Input file list" is automatically sorted in chronological order before generating the required products.
Input Files
Input file list
Input file list of the coregistered or geocoded (_geo) multi-temporal Intensity data (values have to be in linear scale). This file list is mandatory.
Parameters - Principal Parameters
| Mean |
By setting this flag the output pixel value represents the average calculated from all input data.
Std
By setting this flag the output pixel value represents the standard deviation calculated from all input data.
Median
By setting this flag the output pixel value represents the median value (the central value in the ordered series) calculated from all input data.
Gradient
By setting this flag the output pixel value represents the maximum absolute variation between consecutive acquisition dates. The sign of the variation (i.e. increment or decrement) is not taken into account. This file is not generated when the "dB" flag is checked.
Max
By setting this flag the output pixel represents the maximum value extracted from all input data.
Min
By setting this flag the output pixel represents the minimum value extracted from all input data.
Span Difference
By setting this flag the output pixel represents the difference between the maximum value and the minimum value of all input data. This file is not generated when the "dB" flag is checked.
Max Increment
By setting this flag the output pixel value represents the maximum increment between consecutive acquisition dates. This file is not generated when the "dB" flag is checked.
Max Decrement
By setting this flag the output pixel value represents the maximum decrement between consecutive acquisition dates. This file is not generated when the "dB" flag is checked.
Span Ratio
By setting this flag the output pixel represents the ratio calculated between the maximum value and the minimum value of all input data.
Max Ratio
By setting this flag the output pixel represents the maximum value (max backscatter increment) among all ratios calculated between consecutive acquisition dates.
Min Ratio
By setting this flag the output pixel represents the minimum value (max backscatter decrement) among all ratios calculated between consecutive acquisition dates.
MuSigma
By setting this flag the output pixel represents the mean/standard deviation ratio.
Coefficient of Variation
By setting this flag the output pixel represents the standard deviation/mean ratio.
Generate Dates
By setting this flag the dates corresponding to minimum and maximum values are provided (refer to the Technical Note for details).
Mode
By setting this flag the output pixel value represents the mode value (the value which appears more often in the input series) calculated from all input data.
Make cmg RGB
By setting this flag an RGB image containing the Coefficient of Variation, the Minimum and the Gradient will be generated.
Generate Shape
By setting this flag the output shape file/s, with the displacement temporal evolution, are generated.
Parameters - Global
It brings to the general section of the Preferences parameters. Any modified value will be used and stored for further processing sessions.
Parameters - Other Parameters
It brings to the general section of the Preferences parameters. Any modified value will be used and stored for further processing sessions.
Output Files
Output Root Name
Output root name of the selected feature(s). This root name is mandatory.
_spanD
Span difference and associated header files (.sml, .hdr).
_spanR
Span ratio and associated header files (.sml, .hdr).
_cov
Coefficient of variation and corresponding header files (.sml, .hdr).
_mea
Mean image and associated header files (.sml, .hdr).
_med
Median image and associated header files (.sml, .hdr).
_max
Maximum value and associated header files (.sml, .hdr).
_max_Date
For each Pixel, the date of the Maximum value is assigned. Associated header files (.sml, .hdr) are also created.
_min
Minimum value and associated header files (.sml, .hdr).
_min_Date
For each Pixel, the date of the Minimum value is assigned. Associated header files (.sml, .hdr) are also created.
muSigma
MuSigma value and associated header files (.sml, .hdr).
_grad
Gradient image and associated header files (.sml, .hdr).
_maxD
Maximum decrement and associated header files (.sml, .hdr).
_maxD_Date
For each Pixel, the date range of the Maximum Decrement value is assigned. Associated header files (.sml, .hdr) are also created.
_maxI
Maximum increment and associated header files (.sml, .hdr).
_maxI_Date
For each Pixel, the date range of the Maximum Increment value is assigned. Associated header files (.sml, .hdr) are also created.
_maxR
Maximum ratio and associated header files (.sml, .hdr).
_minR
Minimum ratio and associated header files (.sml, .hdr).
_std
Standard deviation and associated header files (.sml, .hdr).
_CovMin_grad_rgb.tif
TIFF image of the assembled RGB imageand associated header files (.hdr).
Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.
General Functions
Exec
The processing step is executed.
Store Batch
The processing step is stored in the batch list. The Batch Browser button allows to load the batch processing list.
Close
The window will be closed.
Help
Specific help document section.
Specific Function(s)
None.
References
None.