Maybe if you add the 3 color fields (passing them to data with the Mark module and then using the compute module and finally the unmark) you will get a final color field that is what you want: [1 0 0] + [0 1 0] + [0 0 1] = white
Jose' Chambel Leitao ------------------------------------- [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of José Luis Gómez Dans Sent: terça-feira, 8 de Maio de 2001 18:25 To: [email protected] Subject: [opendx-users] Colour composites? Hi, I was just trying to visualise some data, and came to the conclusion that it would be nice if I could visualise 3 data sets simultaneously. Say I have 3 images that correspond to the same scene, each with different imaging parameters (this is very normal in remote sensing: you have views of the same scene at, say differentfrequencies). Since the data is overlapping, I can assign each image a basic colour and blend them: -image 1 has red -image 2 has green -image 3 has blue Areas that in the three images have a large value are then seen as white, whereas areas with low values in the three images are mostly black. Basically, you blend the colours. I can do this by working out RGB values and then importing that into DX, but I was wondering whether there's a way to do this automagically. My problem is that I am not sure of this technique's name either. Any help appreciated, José -- José L Gómez Dans PhD student Tel: +44 114 222 5582 Radar & Communications Group FAX; +44 870 132 2990 Department of Electronic Engineering University of Sheffield UK
