1imagery_graphical(1) GRASS GIS User's Manual imagery_graphical(1)
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14 Go to imagery introduction | topics
15 Imagery modules:
17 • i.albedo Computes broad band albedo from surface reflectance.
18 • i.aster.toar Calculates Top of Atmosphere Radiance/Re‐
20 flectance/Brightness Temperature from ASTER DN.
21 • i.atcorr Performs atmospheric correction using the 6S algo‐
23 rithm.
24 • i.band.library Prints available semantic label information used
27 for multispectral data.
28 • i.biomass Computes biomass growth, precursor of crop yield cal‐
30 culation.
31 • i.cca Canonical components analysis (CCA) program for image
33 processing.
34 • i.cluster Generates spectral signatures for land cover types in
36 an image using a clustering algorithm.
37 • i.colors.enhance Performs auto-balancing of colors for RGB im‐
40 ages.
41 • i.eb.eta Actual evapotranspiration for diurnal period (Basti‐
43 aanssen, 1995).
44 • i.eb.evapfr Computes evaporative fraction and root zone soil
46 moisture.
47 • i.eb.hsebal01 Computes sensible heat flux iteration SEBAL 01.
49 • i.eb.netrad Net radiation approximation (Bastiaanssen, 1995).
51 • i.eb.soilheatflux Soil heat flux approximation (Bastiaanssen,
53 1995).
54 • i.emissivity Computes emissivity from NDVI, generic method for
56 sparse land.
57 • i.evapo.mh Computes evapotranspiration calculation modified or
59 original Hargreaves formulation, 2001.
60 • i.evapo.pm Computes potential evapotranspiration calculation
62 with hourly Penman-Monteith.
63 • i.evapo.pt Computes evapotranspiration calculation Priestley
65 and Taylor formulation, 1972.
66 • i.evapo.time Computes temporal integration of satellite ET ac‐
68 tual (ETa) following the daily ET reference (ETo) from meteoro‐
69 logical station(s).
70 • i.fft Fast Fourier Transform (FFT) for image processing.
72 • i.gensig Generates statistics for i.maxlik from raster map.
74 • i.gensigset Generates statistics for i.smap from raster map.
76 • i.group Creates, edits, and lists groups of imagery data.
78 • i.his.rgb Transforms raster maps from HIS (Hue-Intensity-Satu‐
80 ration) color space to RGB (Red-Green-Blue) color space.
81 • i.ifft Inverse Fast Fourier Transform (IFFT) for image process‐
83 ing.
84 • i.image.mosaic Mosaics several images and extends colormap.
86 • i.in.spotvgt Imports SPOT VGT NDVI data into a raster map.
88 • i.landsat.acca Performs Landsat TM/ETM+ Automatic Cloud Cover
90 Assessment (ACCA).
91 • i.landsat.toar Calculates top-of-atmosphere radiance or re‐
93 flectance and temperature for Landsat MSS/TM/ETM+/OLI
94 • i.maxlik Classifies the cell spectral reflectances in imagery
96 data.
97 • i.modis.qc Extracts quality control parameters from MODIS QC
100 layers.
101 • i.oif Calculates Optimum-Index-Factor table for spectral bands
103 • i.ortho.camera Select and modify the imagery group camera ref‐
105 erence file.
106 • i.ortho.elev Select or modify the target elevation model.
108 • i.ortho.init Interactively creates or modifies entries in a
110 camera initial exposure station file for imagery group refer‐
111 enced by a sub-block.
112 • i.ortho.photo Menu driver for the photo imagery programs.
114 • i.ortho.rectify Orthorectifies an image by using the image to
116 photo coordinate transformation matrix.
117 • i.ortho.target Select or modify the imagery group target.
119 • i.ortho.transform Computes a coordinate transformation based on
121 the control points.
122 • i.pansharpen Image fusion algorithms to sharpen multispectral
124 with high-res panchromatic channels
125 • i.pca Principal components analysis (PCA) for image processing.
127 • i.rectify Rectifies an image by computing a coordinate trans‐
129 formation for each pixel in the image based on the control
130 points.
131 • i.rgb.his Transforms raster maps from RGB (Red-Green-Blue)
133 color space to HIS (Hue-Intensity-Saturation) color space.
134 • i.segment Identifies segments (objects) from imagery data.
136 • i.smap Performs contextual image classification using sequen‐
138 tial maximum a posteriori (SMAP) estimation.
139 • i.spectral Displays spectral response at user specified loca‐
141 tions in group or images.
142 • i.target Targets an imagery group to a GRASS location and
144 mapset.
145 • i.tasscap Performs Tasseled Cap (Kauth Thomas) transformation.
147 • i.topo.corr Computes topographic correction of reflectance.
149 • i.vi Calculates different types of vegetation indices.
151 • i.zc Zero-crossing "edge detection" raster function for image
154 processing.
155 Main index | Topics index | Keywords index | Graphical index | Full in‐
157 dex
158 © 2003-2023 GRASS Development Team, GRASS GIS 8.3.1 Reference Manual
160GRASS 8.3.1 imagery_graphical(1)