User Manual - pancroma

21. Quick Start – Pan Sharpening an Image________________________________________________________________You can produce a pan sharpened image almost as easily as producing an RGBimage. To begin the process, Select ‘File’ | ‘Open’ as described in the ‘ImageSubsetting’ section above. Successively select the band images in the order:blue; green; red. In addition, open one additional file, namely the associatedpanchromatic image with the …nn80… (GeoTiff) or ‘…_B80.L1G’ suffix as well.It is recommended that you run your first panchromatic computation with asubsetted Landsat image set, prepared as described above. This will save a lotof computing time while you learn the method and iterate the process in order toachieve the best results.IMPORTANT NOTE: if you are processing Landsat images with the suffix ‘L1G’(raw binary format), it is necessary to obtain the metadata file and to have it inthe same directory as the band and panchromatic files. This file has the suffix‘…_MTL_L1G.mht’, for example: ‘L71002073_07319991106_MTL_L1G.mht’.Note: the metadata file is available in different formats. Be sure to select theHTML version with the file suffix .mht’. If the file is named something different,rename it to match the format above. If PANCROMA TM does not find this file ,you will be prompted to enter the row and column count data manually. Thesewill always be labeled ‘lines’ and ‘samples’ and will look something like this in themetadata files:IMPORTANT NOTE: Some browsers may add control characters when savingthe .mht file. These characters may prevent PANCROMA TM from successfullyreading the metadata. It is usually safest to save the .mht file as a text file (.txt)and then rename it as an .mht file.PRODUCT_SAMPLES_PAN = 15781PRODUCT_LINES_PAN = 13961PRODUCT_SAMPLES_REF = 7891PRODUCT_LINES_REF = 6981IMPORTANT NOTE: The exact number of SAMPLES and LINES variessomewhat from one Landsat file to the next. The first two entries are for the PANfile and the latter two are for the band files. You will not care about this at all forGeoTiff format as the metadata is embedded in the GeoTiff band and PAN filesthemselves. For L1G you will not care either as long as you download themetadata file into the same directory as the band and panchromatic file data asdescribed.When all four files are opened successfully, the relevant menu selections andcheck boxes will be enabled. If you do not wish to set any pre or post imageprocessing parameters, select ‘Pan Sharpen’ from the menu bar. You will be47