Hi!
You can convert a satellite image to jpeg by importing in to ArcGIS ArcMap and implementing the following method: http://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/export-or-convert-raster-datasets.htm
It is also possible to use FME: https://www.safe.com/how-it-works/
For open-source you could also try performing the convertion using QGIS: (example 1): bhttps://gis.stackexchange.com/questions/170380/convert-a-tif-raster-in-img-format-in-qgis
(example 2): https://gis.stackexchange.com/questions/26249/how-to-convert-qgis-generated-tiff-images-into-jpg-jpeg-using-gdal-command-line
I hope this was helpful!
Best regards,
Karolina
the quick answer is to use, e.g., GDAL
gdal_translate image.img image.jpg
However, if you want to visualize your data easily, you will need to RESCALE your image first and SELECT the bands of interest. Indeed, a raw satellite image is usually stored in n*16 bit while you will want to store your jpeg in 3*8bit. With most satellite (not all of them) the bands are ordered by increasing wavelength (from blue to infrareds), so for this purpose you could use OTB (e.g. extract the first three bands then convert to jpg)
otbcli_BandMathX -il image.img -out image3bands.img -exp "{im1b3;im1b2;im1b1}"
otbcli_Rescale -in image3bands.img -out image.jpg uint8
OTB and gdal are both open source and available from, e.g., QGIS if you don't like command lines.
You just read it on Global mapper, or ather image data reading programs and export or save to jpg format. Ok
I recommend using GDAL utility "gdal_translate" http://www.gdal.org/gdal_translate.html
I recommend you to use 'import export' in erdas imagine. fast and easy
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