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What is image processing?
The Digital image processing is the use of computer algorithms to perform image processing on digital images. As a subcategory or field ofdigital signal processing, digital image processing has many advantages over analog image processing. It allows a much wider range of algorithms to be applied to the input data and can avoid problems such as the build-up of noise and signal distortion during processing. Since images are defined over two dimensions (perhaps more) digital image processing may be modeled in the form of multidimensional systems.
Basics of image processing

• importing image data to your RS processing/GIS software

• radiometric image correction

• geometric image correction (georeferencingand geo-coding)

• basic image enhancement

–contrast enhancement
–spatial enhancement

• single band image classification
–density slicing

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