HDR on the cheap, using 'stereo cameras'...

J

j1clark@ucsd.edu

Veteran
Ok, a lightening bolt just struck me... can you use one of these 'stereo' cameras, to put an ND filter on one lens, open up the other, and then eventually 'blend' the two together to get a higher dynamic range than originally possible via the single lenses...

You'd have to maskoff on a 'pixel by pixel' basis any pixel that exceeded a given level (higher or lower depending), as well as 'reregister' the image, rather than using the stereoscopy 'feature'... (this may imply only 'distance' shots could be used...

I don't have such a camera to test this idea out... so, at the moment it is just an idea...
 
I'll have to go with no on that. To get a proper HDR your images have to match of perfectly, otherwise you get a big mess of artifacts. Being offset doesn't just pan over; if it did, stereoscopic cameras wouldn't be necessary. The slight offset gives you a different angle on everything, if only a slight one, which won't match up right when combined, even if you move the image.
 
You'd have to shoot through a beam splitter which is going to be a PITA and will lose light. Not to mention make for an unwieldy rig.
 
I'm still working on the checkered version of the portable hole. So I'm a bit preoccupied. However, go right on ahead.
 
The image would have to be through the same lens.

Because you're not making a stereoscopic image, both 'layers' that would be combined later would have to be the same. side by side images or a prism would offer slightly different images.

However, one lens, a prism and then two sensors of different sensitivities would work.
 
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