imagery_graphical(1grass) GRASS GIS User's Manual imagery_graphical(1grass)
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Graphical index of GRASS GIS modules
Go to imagery introduction | topics
Imagery modules:
• i.albedo Computes broad band albedo from surface reflectance.
• i.aster.toar Calculates Top of Atmosphere Radiance/Re-
flectance/Brightness Temperature from ASTER DN.
• i.atcorr Performs atmospheric correction using the 6S algo-
rithm.
• i.biomass Computes biomass growth, precursor of crop yield cal-
culation.
• i.cca Canonical components analysis (CCA) program for image
processing.
• i.cluster Generates spectral signatures for land cover types in
an image using a clustering algorithm.
• i.colors.enhance Performs auto-balancing of colors for RGB im-
ages.
• i.eb.eta Actual evapotranspiration for diurnal period (Basti-
aanssen, 1995).
• i.eb.evapfr Computes evaporative fraction and root zone soil
moisture.
• i.eb.hsebal01 Computes sensible heat flux iteration SEBAL 01.
• i.eb.netrad Net radiation approximation (Bastiaanssen, 1995).
• i.eb.soilheatflux Soil heat flux approximation (Bastiaanssen,
1995).
• i.emissivity Computes emissivity from NDVI, generic method for
sparse land.
• i.evapo.mh Computes evapotranspiration calculation modified or
original Hargreaves formulation, 2001.
• i.evapo.pm Computes potential evapotranspiration calculation
with hourly Penman-Monteith.
• i.evapo.pt Computes evapotranspiration calculation Priestley
and Taylor formulation, 1972.
• i.evapo.time Computes temporal integration of satellite ET ac-
tual (ETa) following the daily ET reference (ETo) from meteoro-
logical station(s).
• i.fft Fast Fourier Transform (FFT) for image processing.
• i.gensig Generates statistics for i.maxlik from raster map.
• i.gensigset Generates statistics for i.smap from raster map.
• i.group Creates, edits, and lists groups of imagery data.
• i.his.rgb Transforms raster maps from HIS (Hue-Intensity-Satu-
ration) color space to RGB (Red-Green-Blue) color space.
• i.ifft Inverse Fast Fourier Transform (IFFT) for image process-
ing.
• i.image.mosaic Mosaics several images and extends colormap.
• i.in.spotvgt Imports SPOT VGT NDVI data into a raster map.
• i.landsat.acca Performs Landsat TM/ETM+ Automatic Cloud Cover
Assessment (ACCA).
• i.landsat.toar Calculates top-of-atmosphere radiance or re-
flectance and temperature for Landsat MSS/TM/ETM+/OLI
• i.maxlik Classifies the cell spectral reflectances in imagery
data.
• i.modis.qc Extracts quality control parameters from MODIS QC
layers.
• i.oif Calculates Optimum-Index-Factor table for spectral bands
• i.ortho.camera Select and modify the imagery group camera ref-
erence file.
• i.ortho.elev Select or modify the target elevation model.
• i.ortho.init Interactively creates or modifies entries in a
camera initial exposure station file for imagery group refer-
enced by a sub-block.
• i.ortho.photo Menu driver for the photo imagery programs.
• i.ortho.rectify Orthorectifies an image by using the image to
photo coordinate transformation matrix.
• i.ortho.target Select or modify the imagery group target.
• i.ortho.transform Computes a coordinate transformation based on
the control points.
• i.pansharpen Image fusion algorithms to sharpen multispectral
with high-res panchromatic channels
• i.pca Principal components analysis (PCA) for image processing.
• i.rectify Rectifies an image by computing a coordinate trans-
formation for each pixel in the image based on the control
points.
• i.rgb.his Transforms raster maps from RGB (Red-Green-Blue)
color space to HIS (Hue-Intensity-Saturation) color space.
• i.segment Identifies segments (objects) from imagery data.
• i.smap Performs contextual image classification using sequen-
tial maximum a posteriori (SMAP) estimation.
• i.spectral Displays spectral response at user specified loca-
tions in group or images.
• i.target Targets an imagery group to a GRASS location and
mapset.
• i.tasscap Performs Tasseled Cap (Kauth Thomas) transformation.
• i.topo.corr Computes topographic correction of reflectance.
• i.vi Calculates different types of vegetation indices.
• i.zc Zero-crossing "edge detection" raster function for image
processing.
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© 2003-2022 GRASS Development Team, GRASS GIS 7.8.7 Reference Manual
GRASS 7.8.7 imagery_graphical(1grass)
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