iHologram 3D App makes a sweet 3D image on iPhone/iPod Touch (Woops - FAKE!)

Seth Weintraub
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August 31, 2008
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Woops...FAKE!

iHologram - iPhone application from David OReilly

The application works by assuming a constant viewing angle (35-45 degrees), typical for when the device is placed on a tabletop. The 3d scene’s perspective is warped using anamorphosis, the same technique used in Hans Holbein’s painting The Ambassadors. This application does the exact same but updates dynamically.

 

Thanks ITP listserve

Comments (3)

Just Cause (not verified) | August 31, 2008 - 2:20pm

????

9to5Mac Noob (not verified) | August 31, 2008 - 2:34pm

Yep, this is FAKE. The person who made it admitted it was just an idea, see the link below:
http://www.macrumors.com/iphone/2008/08/22/ihologram-looks-remarkable-bu...

MacPredictions (not verified) | August 31, 2008 - 3:16pm

All credit to you for getting Holbein into this article, but it doesn't appear to me that this 3D effect uses anamorphosis as you describe. The viewing angle is important simply because this angle in necessary in order for the iPhone's accelerometer to pick up the rotation. The perspective of the image is then changed as if the camera is moving around the cat, to create the effect that the cat is a 3D object that rotates with the phone. The cat is rendered at a 45 degree perspective to complete the effect.

Andrea Pozzo's trompe l'oeil at Sant Iganzio's Church (referenced in that same Wikipedia article you linked to,) is a better example, I think, in the sense of tricking the eye with foreshortening from an assumed perspective, but the real trick is simply combining the 3D rotation with the rotation of the phone using the accelerometer.