Stereoscopic Reconstruction "In the Round".

Written by Charles Douglas Wehner

The reconstruction of a stereoscopic pair of images from a single "flattie" requires some thought. You cannot go back in time and make a second image.

If we assume that we have a right-eye image, and want to create a left-eye picture, we have to bear in mind that if that left-eye view had been created inrepparttar past, it would have "sneaked" pastrepparttar 113259 object being photographed or painted and have captured slivers of background invisible fromrepparttar 113260 right.

So a human figure in front of a pastoral scene would have pieces of countryside fringing its left.

As wheatstone -repparttar 113261 INVENTOR of stereoscopic imaging - pointed out in his classic 1838 lecture ( ),repparttar 113262 perspective difference betweenrepparttar 113263 eyes is NEGLIGIBLE for distant scenes.

So we would keeprepparttar 113264 scene intact forrepparttar 113265 right eye, and over-paintrepparttar 113266 human figure with some imaginary background untilrepparttar 113267 pastoral scene has been reinvented - at least alongrepparttar 113268 left fringe ofrepparttar 113269 figure.

We would croprepparttar 113270 left-hand edge ofrepparttar 113271 left eye image andrepparttar 113272 right-hand edge ofrepparttar 113273 right-eye image, so that when superimposed upon each other, such as by projection with polarized light,repparttar 113274 left image lands uponrepparttar 113275 screen about two-and-a-quarter inches (62.8 to 64.8 millimetres) torepparttar 113276 left ofrepparttar 113277 right.

The eyes, viewing perhaps through polarized spectacles, will now be obliged to view in parallel if STEREOPSIS (the lack of double-vision) is to be attained. This tellsrepparttar 113278 brain thatrepparttar 113279 background is at infinity.

But what ofrepparttar 113280 human figure?

Perhaps we want to position that figure at six feet distance - about two metres. This would suggest thatrepparttar 113281 reconstructed right-eye view must be offset eighty, eighty-one or eighty-two printer's POINTS torepparttar 113282 right of where it originally was. We can see at once thatrepparttar 113283 specification forrepparttar 113284 landscape reconstruction is a sliver of image torepparttar 113285 figure's left that is eighty, eighty-one or eighty-two points wide.

Andrepparttar 113286 specification forrepparttar 113287 figure itself will be that each point of image-shifting will represent about an inch of backward/forward movement - about two-and-a-half centimetres.

Why Aren't Your Groceries Free?

Written by Sarah Delaporte

I have received many free groceries overrepparttar past several years and many people have come to me to ask why and how I was able to achieve this. Perhaps you are wonderingrepparttar 113258 same thing? I have discovered a technique to receiving free groceries that is very legitimate and actually helpsrepparttar 113259 food manufacturers that offer yourepparttar 113260 free groceries.

By providing consumer feedback, you will not only benefitrepparttar 113261 food companies but may be rewarded yourself.

There are special techniques I have learned overrepparttar 113262 past 5 years to do this however including where and who to write in order to efficiently

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