IMCORR - Feature Tracking

Author: Magnus Bremer (c) 2012
Menu: Grid | Analysis

Description

The tool performs an image correlation based on two raster data sets. Additionally, two DTMs can be given and used to obtain 3D displacement vectors. This is a SAGA implementation of the standalone IMCORR software provided by the National Snow and Ice Data Center in Boulder, Colorado / US.

References

Fahnestock, M. A., Scambos, T. A., and Bindschadler, R. A. (1992): Semi-automated ice velocity determination from satellite imagery. Eos, 73, 493.
Fey, C., Rutzinger, M., Wichmann, V., Prager, C., Bremer, M., and Zangerl, C. (2015): Deriving 3D displacement vectors from multi-temporal airborne laser scanning data for landslide activity analyses. GIScience & Remote Sensing, 52(4), 437-461. DOI 10.1080/15481603.2015.1045278.
Scambos, T. A., Dutkiewicz, M. J., Wilson, J. C., and Bindschadler, R. A. (1992): Application of image cross-correlation to the measurement of glacier velocity using satellite image data. Remote Sensing Environ., 42(3), 177-186.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Grid 1	grid, input	`GRID_1`	The first grid to correlate	-
	Grid 2	grid, input	`GRID_2`	The second grid to correlate	-
	DTM 1	grid, input, optional	`DTM_1`	The first DTM used to assign height information to grid 1	-
	DTM 2	grid, input, optional	`DTM_2`	The second DTM used to assign height information to grid 2	-
Output	Correlated Points	shapes, output	`CORRPOINTS`	Correlated points with displacement and correlation information	-
Output	Displacement Vector	shapes, output	`CORRLINES`	Displacement vectors between correlated points	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Search Chip Size (Cells)	choice	`SEARCH_CHIPSIZE`	Chip size of search chip, used to find correlating reference chip	Available Choices: [0] 16x16 [1] 32x32 [2] 64x64 [3] 128x128 [4] 256x256 Default: 2
	Reference Chip Size (Cells)	choice	`REF_CHIPSIZE`	Chip size of reference chip to be found in search chip	Available Choices: [0] 16x16 [1] 32x32 [2] 64x64 [3] 128x128 Default: 1
	Grid Spacing (Map Units)	floating point number	`GRID_SPACING`	Grid spacing used for the construction of correlated points [map units]	Minimum: 0.100000 Maximum: 256.000000 Default: 10.000000

Command Line


Usage: saga_cmd grid_analysis 19 [-GRID_1 ] [-GRID_2 ] [-DTM_1 ] [-DTM_2 ] [-CORRPOINTS ] [-CORRLINES ] [-SEARCH_CHIPSIZE ] [-REF_CHIPSIZE ] [-GRID_SPACING ]
  -GRID_1:            Grid 1
	grid, input
  -GRID_2:            Grid 2
	grid, input
  -DTM_1:             DTM 1
	grid, input, optional
  -DTM_2:             DTM 2
	grid, input, optional
  -CORRPOINTS:        Correlated Points
	shapes, output
  -CORRLINES:         Displacement Vector
	shapes, output
  -SEARCH_CHIPSIZE:
                           Search Chip Size (Cells)
                           	choice
                           	Available Choices:
                           	[0] 16x16
                           	[1] 32x32
                           	[2] 64x64
                           	[3] 128x128
                           	[4] 256x256
                           	Default: 2
  -REF_CHIPSIZE:
                           Reference Chip Size (Cells)
                           	choice
                           	Available Choices:
                           	[0] 16x16
                           	[1] 32x32
                           	[2] 64x64
                           	[3] 128x128
                           	Default: 1
  -GRID_SPACING:
                           Grid Spacing (Map Units)
                           	floating point number
                           	Minimum: 0.100000
                           	Maximum: 256.000000
                           	Default: 10.000000