PRIMEWIN: Processing of Images on Windows

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## Regional Remote Sensing Centre-Central, NAGPUR

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# VIEWER: Satellite Data Loading and Display

VIEWER is a common module for satellite data loading from CD to Disk and data loading from Disk to display. It supports loading of IRS series of data viz. LISS-I, LISS-II, LISS-III, LISS-IV, PAN, LISS-IV mono, WiFS, AWiFS, OCM, Cartosat etc.

It encompasses large suite of functionalities required by display handler viz. full resolution display, numeric dump, contrast enhancements-linear, nonlinear, custom, sub-image extraction, zoom, pan, pseudo-color rendering, data profile, image statistics etc. It also facilitates vector (Shape file format) display coupled with limited suite of vector handling.

Satellite Data Loading | Data Display | Ancillary Display tools | Pixel Grabber

Contrast enhancements | Sub-Image extraction | Vector Display | Image Statistics

· Satellite Data Loading:

This utility facilitates loading of all IRS series of satellite data from CD (in format supplied by NDC, NRSA, Hyderabad) to desired location on DISK.

Important Note:

· Satellite Data supplied in GeoTiff format

· If the satellite data on CD has been supplied in GeoTiff format (e.g. for Cartosat-1 or Cartosat-2), Geotiff file can be simply copied to desired location on disk. It can be viewed in Viewer and processed in PRIMEWIN package.

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· Load the Geotiff file through Viewer and save it on the disk using through File - > Save As. Enter the path and filename for saving the image. If any enhancement has been applied on the image, enhanced image will be saved on the disk.

· Satellite Data supplied in Multiple CDs

· If the satellite data has been supplied on multiple CDs (e.g. for AWiFS), Copy contents of multiple CDs into a single folder on disk and use Viewer interface for loading the data on the display or disk.

Follow sequence of steps shown in the following figure to load the data from CD to disk.

Data will be loaded at the desired location with the filename entered by the user. To load saved file on the display, see help on Data display.

· Data Display: Follow sequence of steps shown in the following figures for loading the data from disk to display handler.

Full resolution window can be resized as desired. After resizing the window press load button to reload the image to fit the resized window.

· Ancillary Display Tools: Following figure depicts various ancillary tools available in display handler

· Contrast Enhancements Tools: Following figure depicts steps for contrast enhancements.

· Pseudocolor Rendering: Following figure depicts steps for pseudocolor rendering for classified or spectral indices images.

· Data Profile:

· Sub-Image Extraction: Follow sequence of steps shown in the following figure to extract the desired sub-area of image.

· Vector Display and Tools: Follow sequence of steps shown in the following figures to display the vector layer (Shape file format), manipulate rendering properties of vectors and perform limited query on the displayed vector layer.

· Manipulation of Vector rendering properties: See following figures for handling vector properties viz. displaying vectors with different colors, flood fill using lookup table, annotation, identification, query etc.

· Pixel Grabber: This utility facilitates capturing of DN values to generate seed file (cluster centers - Optional) for K-means or ISODATA clustering and Tasseled Cap Transformation. See the following figure for sequence of steps.

To activate Pixel grabber, first load the desired image in full resolution in Veiwer and invoke pixel grabber from Tools - > Pixel grabber. Following interface will appear.

§ Image Statistics: This utility facilitates calculation of image statistics viz. minimum, maximum, mean, mode, standard deviation, histogram and scatter plot. First display the image in the viewer either in overview window or full resolution and press icon on either overview window or full resolution window. Image statistics is calculated for the entire image. See the following figure for help;