Venus Full Disk -mariner 10 Options

[Malmer]

Hi!

I have just finished compositing this large Venus panorama from Mariner 10.

I have tried to generate natural colors for the planet using orange and UV filters.

Raw frames: FDS 58870-59038
I used 78 frames in that range and then picked out a few other frames to fill in the gaps. There where about 5% missing data.

I did dark subtraction and flatfielding. for flatfields i used the venus images that looked flat enough.

Does anyone have any information on camera linearity and stuff?
I cant seem to find the calibration report; "MVM 73 TV Subsystem Calibration Report". if anyone has it, please let me have a look!

The full panorama is 4000*4000 pixels.

All processing is done in either floats or 16bit.

Take a look!
/mattias


Venus realistic colors

Venus enhanced colors

Venus in UV

[Malmer]

Im not sure on what to do with the picture named "VENUS_HQ_MOSAIC.jpg"
I want it to be as natural in color as possible. Does anyone have any telescopic pictures that i can use as reference? (did hubble ever picture venus in visible light?)


I searched trough the mariner edrs and found this "minusUV" filtered image of the southern pole. it clearly shows some kind of markings/bandings.

The minus uv filter reaches from about 400 to 670nm and is centered on 511nm. So it basically covers the visible spectra. (missing out some in the reds) so whatever brightness variations that shows up in this picture should be visible to the eye. and remember that these pictures only contain 256 levels and that the screen on your computer is extremly low in dynamic range. so whatever detail shows up here would be easy to see in real life. im also not sure about the linearity of the videocons. Usually cameras are slightly logaritmic. So in reality the scene is probably more contrasty.

I also found an orange image showing the same area. they are very much alike. But since they where photographed by different cameras with unknown properties* its hard to know what colors would actually be there.

*unknown to me at least, I sure would like to find the calibration report... anyone?

Mattias

Attached thumbnail(s)

 

[tedstryk]

Every telescopic photo I have seen has been basically white. That is the result that I get too.