3D Image Interleaving for Motion Continuity
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Solution Overview
Problem
The conventional 24 frames per second standard in motion picture photography and projection results in significant loss of motion continuity, blurring, and strobing, particularly in stereoscopic 3D imagery, due to the double-shuttering mechanism, which limits screen brightness and the overall immersive experience.
Innovation Solution
A method and apparatus for photographing and projecting moving images at a higher frame rate, specifically 144 frames per second, by interleaving and alternating left and right eye images to maintain temporal continuity and reduce blurring and strobing, using dual digital cameras or a single camera with an alternating mirror shutter, allowing for increased screen brightness and clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional 24 fps standard with double-shuttering is used, then the projection system can operate with standard equipment, but motion continuity is significantly lost and strobing effects occur
Solution Approach 1:
The patent divides the stereoscopic image sequence into separate left-eye and right-eye image sequences, each photographed and projected at 24 fps independently. This segmentation allows each eye's images to maintain full motion continuity without the interleaving interruptions that cause strobing in conventional 3D systems.
Solution Approach 2:
The patent employs periodic shuttering at 48 Hz (double the standard 24 fps) for each eye's image sequence, creating non-overlapping time intervals for left and right eye projections. This periodic action eliminates motion continuity loss while maintaining compatibility with standard projection equipment.
2Object-affected harmful factors
If the screen brightness is limited to not more than 16 foot lamberts, then perceived flicker is reduced, but the immersive experience is diminished
Solution Approach 1:
The patent changes the temporal parameters of image projection by photographing and projecting each eye's images at 24 fps with 48 Hz shuttering, creating 12 distinct image flashes per second per eye. This parameter change allows the screen brightness to exceed 16 foot lamberts without reintroducing objectionable flicker, thereby enhancing the immersive experience.
3Speed
If frame-to-frame image displacement is increased to capture fast action, then more motion is captured, but blurring and strobing become objectionable
Solution Approach 1:
The patent ensures continuity of useful action by maintaining 24 fps photography and projection rates for each eye's image sequence, with the shutter open for 1/48th of a second during each frame exposure. This continuous action captures fast motion clearly without blurring or strobing, while the segmented approach preserves motion continuity across frame transitions.
Data Source
AI summary
A digital cinematographic and projection process that provides a means of 3D stereoscopic imagery that is not adversely affected by the standard frame rate of 24 frames per second, as is the convention in the motion picture industry worldwide. A method for photographing and projecting moving images in three dimensions includes recording a moving image with a first and a second camera simultaneously and interleaving a plurality of frames recorded by the first camera with a plurality of frames recorded by the second camera. The step of interleaving includes retaining odd numbered frames recorded by the first camera and deleting the even numbered frames, retaining even numbered frames recorded by the second camera and deleting the odd numbered frames, and creating an image sequence by alternating the retained images from the first and second camera.