 next unit will be on basics of image processing which is very important in fact this the unit 5th will be basics of image processing 1 and 6th will be image processing 2 this is very important where nowadays we do major input to your GIS analysis under gene informatics is remote sensing data or image what do you mean by image basically satellite image exactly because satellite images are very frequent very I mean time to time ever 10 days 50 days 20 days we are getting those satellite data are the major input to your GIS that's why the image processing is very important so under this image processing one should know what is this image how to read the image what components we have what is which color indicating what which pattern indicating what which texture indicating what that we should know like if you wish to read the English we should know ABCD first without knowing alphabets we cannot read English the similar way if you want to read the satellite image we should know first what is what indicating how to read the satellite image we should know under this image processing so there are two kinds of image processing the one is the manually you can interpret the satellite image second one is digital image interpretation probably we have the second unit digital image interpretation where system there are softwares put your input as a satellite image system calculates everything then it will give by in your area this much land under agriculture this much land under water body this much land under fellow this much land under settlement that thematically quantified by the system in digital image processing the software will do but just you should do in there are two techniques again one technique is you have to guide what is what second technique is no I don't know anything the entire image please classify into five classes based on your pixels I think you know no image will be made with the pixels pixel means very good pixel means picture elementary this is the raster data your satellite data like your photograph software photograph or your TV right all is the raster form which made with the pixels right this is the pixel pixel means picture element picture bantai pixel side right picture element right based on the size of the pixel we know that we call spatial resolution spatial resolution means how the size of the pixel is in your satellite image if the pixel size is small then clarity will be high go to home and see your TV closely there is a grid form which called raster format right the satellite image also comes in the raster format so your image processing the digital image processing specifically based on this pixels only if it is agricultural land is also agricultural land this will have same pixel value if it is water body it will have same pixel value this pixel having value by default it may come zero zero then it will be calculated with your own GIS when you want to convert as a GIS map for taking latitude longitude no no I don't want that I want only this pixel values where I have the different types of land use patron land cover patron means agriculture fellow and all then you see the pixel value what are all having similar pixel value that will be generated by the system by this is agricultural land this is fellow land this is water body XYZ based on the pixel values in raster format so we will see what are all having on the basics of image processing in the unit tree