| i.atcorr | Performs atmospheric correction using the 6S algorithm.
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| i.cca | Canonical components analysis (cca) program for image processing. |
| i.class | Generates spectral signatures for an image by allowing the user to outline regions of interest.
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| i.cluster | Generates spectral signatures for land cover types in an image using a clustering algorithm.
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| i.fft | Fast Fourier Transform (FFT) for image processing. |
| i.fusion.brovey | Brovey transform to merge multispectral and high-res panchromatic channels |
| i.gensig | Generates statistics for i.maxlik from raster map layer. |
| i.gensigset | Generate statistics for i.smap from raster map layer. |
| i.group | Creates, edits, and lists groups and subgroups of imagery files. |
| i.his.rgb | Hue-intensity-saturation (his) to red-green-blue (rgb) raster map color transformation function. |
| i.ifft | Inverse Fast Fourier Transform (IFFT) for image processing. |
| i.image.mosaic | Mosaics up to 4 images and extends colormap; creates map *.mosaic |
| i.in.spotvgt | Import of SPOT VGT NDVI file into a raster map |
| i.landsat.rgb | Auto-balancing of colors for LANDSAT images |
| i.maxlik | Classifies the cell spectral reflectances in imagery data.
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| i.oif | Calculates Optimum-Index-Factor table for LANDSAT TM bands 1-5, & 7 |
| i.ortho.photo | Menu driver for the photo imagery programs. |
| i.pca | Principal components analysis (pca) program for image processing. |
| i.points | Mark ground control points on image to be rectified. |
| i.rectify | Rectifies an image by computing a coordinate transformation for each pixel in the image based on the control points |
| i.rgb.his | Red-green-blue (rgb) to hue-intensity-saturation (his) raster map color transformation function |
| i.smap | Performs contextual image classification using sequential maximum a posteriori (SMAP) estimation. |
| i.spectral | displays spectral response at user specified locations in group or images |
| i.target | Targets an imagery group to a GRASS location and mapset. |
| i.tasscap | Tasseled Cap (Kauth Thomas) transformation for LANDSAT-TM data |
| i.vpoints | Set registration points for an imagery group from a vector map or keyboard entry. |
| i.zc | Zero-crossing "edge detection" raster function for image processing. |
