"Polling" colors on an inserted image

[abain.117305]

I want to insert color aerial photos in AutoCAD (either .sid or .tif files) and then create a grid based on state plane coordinates. I need a lisp routine to evaluate the "pixels" within each grid block and determine the "average" color. Is there any way to poll the image once it has been inserted to determine the pixel color values?

[RobertB]

Not that I'm aware.

[dgorsman]

Not directly, anyways. You could use a pick coordinate relative to the image frame to determine the pixel coordinates in the original image file. You would need a means of reading the image file as data to pull off the rest.

[irneb]

If you can insert the image using the older methods (which converts the image into a series of 2d Solids) it "might" be possible to get a guesstimate using lisp.

I'd think though it would be easier using some image editing app to get this type of data.