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I am a new user of QGIS please suggest how to perform image enhancement operations on an satellite imagery like ratioing, contrast stretching, edge engancement, filtering etc. in QGIS?

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2 Answers

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in qgis for contrast stretching:

  • Right click your layer > Properties > Style , at the lower right Contrast Enhancement to Stretch To MinMax

    and in Raster menu you have lots of thing for imagery as Raster to vector,contour, clipper, proximity...

i hope it helps you...

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Thank you for your Suggestions. – Nikita Gehlot Jan 4 at 7:03
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Please check this & try to search on google regarding QGIS tutorials for raster data.

Tutorial : http://qgis.spatialthoughts.com/2012/10/tutorial-basic-raster-analysis-and.html#more

Also check this http://hub.qgis.org/projects/quantum-gis/wiki/How_do_I_do_that_in_QGIS

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Thank you for your Suggestions – Nikita Gehlot Jan 4 at 7:03

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