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Last Post 09 Mar 2009 09:10 AM by  anon
Extract part of image of an idlgrimage
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anon



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09 Mar 2009 09:10 AM
    Hi everybody I would like to know what is the best way to extract a small portion of an image in an array of an IDgrImage without using IDLgrImage->Getproperty , data = data. For example my image (5000*7000) has been loaded in my idlgrimage, ans i would like to extract for example a 50*50 portion of this image in an array[50,50]. I know i can use IDLgrImage ->GetProperty, data = data & data = data[*,50,50] But, because of memory troubles caused by the size of my image, i would like to know if it is possible to extract directly the portion of my image directly from the idlgrimage... thank very much for your answer ! aurelien boulben  

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    12 Mar 2009 08:34 AM
       This topic comes up often on comp.lang.idl-pvwave in Google Groups. It does take some programming work to get it to work. I found Mike Galloy's tiling demo with IDLgrImage a big help with understanding how this all works. http://michaelgalloy.com/...iling-in-idl-62.html ITTVIS covers this in their Advance IDL classes as well. Check out their ftp site for the tiler code samples. Kelly
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