new THEMIS color releases, Images showing color variations. Options

[DDAVIS]

First of a new series:

http://themis.asu.edu/zoom-20060622a

[climber]

If I read it correctly, these are true colours. Details and the whole picture are just magnificent. True artistic work.

[DDAVIS]

If I read it correctly, these are true colours. Details and the whole picture are just magnificent. True artistic work.

Thanks! I have actually done less 'editorial' colour adjustment in this series than with the Meles Chasma image, the goal being to try to show what the camera was seeing while removing the distracting light leak stripes. When the judgement has to be made on supressing bright or dark discontinuities in an image, the direction this would bring the color balance toward or away from the known range of Martian colors recieves consideration. There are some images where the 'purple' cast common to RGV images shows in dark parts of the image, and others where the scene may have a haze overlay giving a blueish to violet 'wash' over much of the scene, but not all. Anything that looks like it's not an obvious camera related artifact is left in. Seeing subtle color variations within a frame are among the strengths of the THEMIS camera, and images showing such are paramount among the ones I look for.

A slightly dated page on color filters and color images can be seen here:
http://www.donaldedavis.com/2003NEW/CLRWORK/CLRTEST.html

The examples suggest something of the color fidelity of various spacecraft cameras, including the R(green faked from clear)B New Horizons imaging system.

Don