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Exporting ENVI display to reduced reslution JPEG [message #53210]

Thu, 29 March 2007 09:22

Matt[1]
Messages: 23
Registered: December 2006

Junior Member

I need to create over 300 reduced resolution JPEGS derived from
satellite data. Each JPEG contains between 100 and 5000 pixels with
values of 1 out of 35 million pixels with values of 0. When I create
the reduced resolution JPEG the 1 pixels are lost in the sea of 0
pixels.

So, I created a vector layer that has a point for each pixel with a
value of 1. I then overlay the vector on the image, and export the
result into a reduced resolution JPEG. I've gotten as far as creating
the vector layer, but haven't figured out if I can programmatically
export the 'scroll' display that I get. The help files haven't helped
me much.

I have figured out that you can get a display number from ENVI once a
display is opened, which leads me to beleive that you could use this
number to export the image, but haven't found anything explicitly
stating this.

Any suggestions on how I could go about exporting a reduced resolution
JPEG from a vector overlayed on a raster? Should I bypass ENVI all
together and work through IDL exclusively? Any input will be greatly
appreciated.

thanks,
Matt

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