HOME      LEARN 3D-INVERTED Stereoscopic VISION    

                       Updated Jan 31th, 2000 

Introduction : 3D inverted vision is a simple technique which enables you to see in 3D from a set of two normal pictures taken with future 3D display on mind.

The photographer select an appropriate subject with different depth planes. He takes the first picture carefully centering the field on a particular detail, then translate the camera horizontally to the right (or left) and takes the second one also carefully centered on the previous detail. For good 3D effect the distance between the two shots is at least 5% of the distance of the main subject. The more distance, the more 3D effect ... but exaggeration turns out bad images. Minor problems can be fixed later while processing images. For display, the image to be seen with the left eye is put on the right and reciprocally.

The lesson : Some people learn this technique in an instant, some have incredible difficulties. This is why I made this illustrated lesson to help the formers. All the lesson is on the same page, so when it is entirely loaded, you may disconnect your computer from the phone line. As learning to ride a bicycle for the first time it is tiring and prone to failure. So please to avoid eye ache, limit your first tests to about 5 min, relax by closing your eyes a few seconds between trials. Don't be discouraged if you fail today ! You can retry tomorrow (you can print it !). After a while it becomes almost as easy as normal vision ... and as bicycle riding, you will never forget !

Then, you can also, for fun, look with a 3D-vision at your keyboard, some repetitive screen saver ...

FIRST IMAGE : your GOAL, a beautiful Alps scenery giving intense 3D sensation up to 30 Km !

               

Second IMAGE : This is the image you will train your eyes and brain on. The two red dots will help you. look at the next images and explanations below then come back to try by yourself. When you are satisfied you can gaze at the first image ... and all images - in any size - displayed for 3D-inverted vision.

       

 (For a new fast method I invented jump after step III)

The method in 5 steps :

I) If you wear glasses, please keep them. Put your finger almost against the screen showing the second image on the middle vertical grey stripe slightly under the level of the two red dots as shown on the picture below :

                                       

II) Move your finger backwards (not to fast) and look only at its tip. When it is about half way between you and the screen you should have something like the picture below in your field of view : two grey stripes and two more red spots (plus your finger somewhere in the middle, not shown in the picture):

                                               

III) When you get this kind of image, forget your finger, and look at the two new red spots in the middle. Take 10 sec now, don't quit them, while taking your finger away. Try to relax your eyes and shoulders. Now either by itself (relax more it could happen naturally) or with some eye movements, the two spots should move one towards the other as illustrated below with the two green arrows. Also tilt you head slightly and slowly rightward and leftward until the two red dots are seen on a perfectly horizontal line. If failure close your eyes for 15 sec and go back to step I

                                             

New fast alternative method   :))

Place yourself about 50cm in front of the screen, precisely in the vertical axis of the two pictures of the second image (with the two red spots). Just keep on looking at the pictures until I say the contrary and put your finger between you and the screen in the axis at 30 cm of your eyes. As you are focusing at the pictures your should see two dark transparent fingers, one on the right and one on the left of the axis ! Now move your finger  horizontally between you and the screen in order to see two fingertips (precisely placed, this is most important) .5 cm under each two red spots (make lateral moves for positioning and longitudinal ones for separation).        

Now without any other body movements just look rapidly and precisely at your fingertip !

Instantly you should see a red spot just above it ! Stare at that fused red spot while removing your finger.

IV) When the two red spots are fused into one, you see something as illustrated below with a beautiful 3D scenery in the middle !

                                   

V) As some people have told me that they could the now the 3D image, but it was out of focus !     In that case there is a magic word : RELAX ! Indeed, your brain does it alone ! Remember : shoulders ! What you can try  if you do not succeed rightaway is to get much closer or much farther from the screen without letting the 3D image go away. It may work better for you at one meter from the screen or at 25 cm from it (but in the former position it is more tiring).

Another point : You should know that generally the author was looking/aiming at a point near the center (or if nothing available on the middle vertical axis) of the image . Try to focus on a structure of the image located there at middle distance ! E.g. in the picture below at the foot of the tree. It is normal that as in the reality some objects in front will be defocused.

BRAVO ! 3D-Inverted vision has no more secrets for you !  Enjoy  (:-))

As a gift for your new success try this incredible 3D shot  in high resolution below

Reminder :

Texts and images of this web site all Copyright S. Weiller, 1999, 2000

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