Skip to content

Topic: imagery

Tool Description
i.band.library Prints available semantic label information used for multispectral data.
r.semantic.label Manages semantic label information assigned to a single raster map or to a list of raster maps.

See also the corresponding keyword for additional references:

imagery

  • Interactive scatter plot - wxGUI Interactive Scatter Plot Tool
  • g.gui.iclass - wxGUI Supervised Classification Tool
  • g.gui.iclass - wxGUI Supervised Classification Tool
  • g.gui.image2target - wxGUI GCP Manager
  • g.gui.photo2image - wxGUI GCP Manager for photo to image registration
  • i.albedo - Computes broad band albedo from surface reflectance.
  • i.aster.toar - Calculates Top of Atmosphere Radiance/Reflectance/Brightness Temperature from ASTER DN.
  • i.atcorr - Performs atmospheric correction using the 6S algorithm. 6S - Second Simulation of Satellite Signal in the Solar Spectrum.
  • i.band.library - Prints available semantic label information used for multispectral data.
  • i.biomass - Computes biomass growth, precursor of crop yield calculation.
  • 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. The resulting signature file is used as input for i.maxlik, to generate an unsupervised image classification.
  • i.colors.enhance - Performs auto-balancing of colors for RGB images.
  • i.cutlines - Creates semantically meaningful tile borders
  • i.cva - Performs Change Vector Analysis (CVA) in two dimensions.
  • i.destripe - Destripes regularly, about vertical, striped image using Fourier.
  • i.eb.deltat - Computes the difference of temperature between surface skin temperature and air temperature at 2m as part of sensible heat flux calculations.
  • i.eb.eta - Actual evapotranspiration for diurnal period (Bastiaanssen, 1995).
  • i.eb.evapfr - Computes evaporative fraction and root zone soil moisture.
  • i.eb.hsebal01 - Computes sensible heat flux iteration SEBAL 01.
  • i.eb.hsebal95 - Performs sensible heat flux iteration (SEBAL 95).
  • i.eb.netrad - Net radiation approximation (Bastiaanssen, 1995).
  • i.eb.soilheatflux - Soil heat flux approximation (Bastiaanssen, 1995).
  • i.eb.z0m - Computes momentum roughness length (z0m) and surface roughness for heat transport (z0h) after Bastiaanssen (2004).
  • i.eb.z0m0 - Computes momentum roughness length (z0m) and surface roughness for heat transport (z0h) after Bastiaanssen (2004).
  • i.emissivity - Computes emissivity from NDVI, generic method for sparse land.
  • i.eodag - Downloads imagery scenes from various providers through the EODAG API.
  • 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 actual (ETa) following the daily ET reference (ETo) from meteorological station(s).
  • i.evapo.zk - Computes global evapotranspiration calculation after Zhang, Kimball, Nemani and Running formulation, 2010.
  • i.feotio2 - Calculates the FeO or TiO2 contents from the Clementine project Moon data.
  • i.fft - Fast Fourier Transform (FFT) for image processing.
  • i.fusion.hpf - Fusing high resolution panchromatic and low resolution multi-spectral data based on the High-Pass Filter Addition technique (Gangkofner, 2008).
  • i.gabor - Creates Gabor filter bank for a 2-dimensional image
  • i.gcp - Manages Ground Control Points (GCPs) non-interactively.
  • i.gensig - Generates statistics for i.maxlik from raster map.
  • i.gensigset - Generates statistics for i.smap from raster map.
  • i.gravity - Bouguer gravity anomaly computation (full slab).
  • i.group - Creates, edits, and lists groups of imagery data.
  • i.his.rgb - Transforms raster maps from HIS (Hue-Intensity-Saturation) color space to RGB (Red-Green-Blue) color space.
  • i.histo.match - Calculate histogram matching of several images.
  • i.hyper.composite - Create RGB/CIR/SWIR and custom false color composites from a hyperspectral 3D raster map.
  • i.hyper.import - Hyperspectral imagery import.
  • i.ifft - Inverse Fast Fourier Transform (IFFT) for image processing.
  • i.image.bathymetry - Estimates Satellite Derived Bathymetry (SDB) from multispectral images.
  • i.image.mosaic - Mosaics several images and extends colormap.
  • i.in.probav - Imports PROBA-V NDVI data in netCDF format into a raster map with real NDVI data range.
  • 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.import - Imports Landsat satellite data downloaded using i.landsat.download.
  • i.landsat.qa - Reclassifies Landsat QA band according to acceptable pixel quality as defined by the user.
  • i.landsat.toar - Calculates top-of-atmosphere radiance or reflectance and temperature for Landsat MSS/TM/ETM+/OLI
  • i.landsat8.swlst - Practical split-window algorithm estimating Land Surface Temperature from Landsat 8 OLI/TIRS imagery (Du, Chen; Ren, Huazhong; Qin, Qiming; Meng, Jinjie; Zhao, Shaohua. 2015)
  • i.lmf - Performs Temporal Local Maximum Fitting of vegetation indices, works also for surface reflectance data.
  • i.lswt - Computes Lake Surface Water Temperatures (inland water bodies) from TOA Brightness Temperatures.
  • i.maxlik - Classifies the cell spectral reflectances in imagery data. Classification is based on the spectral signature information generated by either i.cluster, g.gui.iclass, or i.gensig.
  • i.modis.qc - Extracts quality control parameters from MODIS QC layers.
  • i.nightlights.intercalibration - Performs inter-satellite calibration on DMSP-OLS Nighttime Lights Time Series
  • i.oif - Calculates Optimum-Index-Factor table for spectral bands
  • i.ortho.camera - Select and modify the imagery group camera reference file.
  • i.ortho.corr - Corrects orthophoto taking part of the adjacent orthophotos using a camera angle map.
  • 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 referenced 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.points.auto - Generate ground control points for image group to be rectified.
  • i.pysptools.unmix - Extract endmembers from imagery group and perform spectral unmixing using pysptools
  • i.rectify - Rectifies an image by computing a coordinate transformation 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.rotate - Rotates the image around the centre of the computational window
  • i.sam2 - Integrates SAMGeo model with text prompt for segmentation in GRASS GIS.
  • i.sar.speckle - Remove speckle from SAR image
  • i.segment - Identifies segments (objects) from imagery data.
  • i.segment.gsoc - Outputs a single segmented map (raster) based on input values in an image group.
  • i.segment.hierarchical - Hierarchical segmentation
  • i.segment.stats - Calculates statistics describing raster areas.
  • i.segment.uspo - Unsupervised segmentation parameter optimization
  • i.sentinel.coverage - Checks the area coverage of Sentinel-1 or Sentinel-2 scenes selected by filters.
  • i.sentinel.download - Downloads Sentinel satellite data from Copernicus Open Access Hub, USGS Earth Explorer, or Google Cloud Storage.
  • i.sentinel.import - Imports Sentinel satellite data downloaded from Copernicus Open Access Hub using i.sentinel.download.
  • i.sentinel.mask - Creates clouds and shadows masks for Sentinel-2 images.
  • i.sentinel.parallel.download - Downloads Sentinel-2 images in parallel using i.sentinel.download.
  • i.sentinel.preproc - Imports and performs atmospheric correction of Sentinel-2 images.
  • i.signature.copy - Copies signature file from a group/subgroup to another group/subgroup.
  • i.signature.list - Lists signature file of a group/subgroup.
  • i.signatures - Manage imagery classification signature files
  • i.smap - Performs contextual image classification using sequential maximum a posteriori (SMAP) estimation.
  • i.spec.sam - Performs Spectral angle mapping on satellite/aerial images
  • i.spec.unmix - Performs Spectral mixture analysis of satellite/aerial images
  • i.spectral - Displays spectral response at user specified locations in group or images.
  • i.superpixels.slic - Perform image segmentation using the SLIC segmentation method.
  • i.svm.predict - Predict with a SVM Predict with a Support Vector Machine
  • i.svm.train - Train a SVM Train a Support Vector Machine
  • i.target - Targets an imagery group to a GRASS location and mapset.
  • i.tasscap - Performs Tasseled Cap (Kauth Thomas) transformation.
  • i.theilsen - Computes Theil-Sen estimator from spectrum.
  • i.topo.corr - Computes topographic correction of reflectance.
  • i.variance - Analyses variation of variance with variation of resolution
  • i.vi - Calculates different types of vegetation indices. Uses red and nir bands mostly, and some indices require additional bands.
  • i.water - Water detection from satellite data derived indices, 1 if found, 0 if not
  • i.wavelet - Decompostion/Recomposition in temporal dimension using wavelets
  • i.wi - Calculates different types of water indices.
  • i.zc - Zero-crossing "edge detection" raster function for image processing.
  • i.zero2null - Replaces zero values with null at edges, otherwise replaces zero values with appropriate neighboring values.
  • r.colors.contrastbrightness - Change the contrast/brightness of a raster.
  • r.flip - Flips an image. Flips an image.
  • r.fusion - image fusion, generalized pan-sharpening
  • r.houghtransform - Performs Hough transformation and extracts line segments from image. Region shall be set to input map. Can work only on small images since map is loaded into memory.
  • r.in.aster - Georeference, rectify, and import Terra-ASTER imagery and relative DEMs using gdalwarp.
  • r.semantic.label - Manages semantic label information assigned to a single raster map or to a list of raster maps.
  • r.smooth.seg - Generates a piece-wise smooth approximation of the input raster and a discontinuity map.
  • r3.to.group - Convert a 3D raster map to imagery group