Nightshade Legacy

Fisheye landscape calibration

Asked by Balazs Bernath

Hello,

I would like to use my custom fisheye landscapes wiht Nightshades. Some of them are photos made with a Nikon FC-E9 fisheye objective, some others are generated textures. I am wondering how the program maps a given pixel to a given elevation and azimuth, so how should I tune my photos to see them without distortion. The look of the horizontal grid on the desktop implies that simply pixels should be taken as units of elevation angle. Unfortunately I could not find any detailed description. Are there descriptions or calibration curves available?

Many thanks in advance!
Balazs

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Rob Spearman (rob-digitaliseducation) said : 		#1

By default Nightshade uses a standard polar projection, which means the altitude angle is linear between the horizon and zenith on screen.

So unless you have a lot of lens distortion, you should not have to do anything to your photos. But if angles seem off compared to the Alt/Az grid, you could warp your image to change the radial distortion somehow.

Rob

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