Stereo View Alignment via Screen Space Transform
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Solution Overview
Problem
Current 3-D viewing technologies using stereography often cause viewer discomfort such as headaches and nausea due to misalignment issues between left and right eye images, which can affect both viewers and production teams.
Innovation Solution
Implementing a screen space transform method that aligns stereographic images by selecting a master camera and an aligned camera, and applying transformations such as translation, scaling, and rotation to ensure vertical location, scale, and rotational alignment between the two images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stereographic images are captured without alignment transformation, then the production process is simpler and faster, but the viewer experience deteriorates due to misalignment causing headaches and nausea
Solution Approach 1:
The patent applies alignment transformations (translation, rotation, scaling) to the stereographic images during post-production processing. This preliminary action corrects the misalignment between left and right eye images before they are presented to viewers, preventing discomfort while maintaining relatively simple production workflows.
2Object-affected harmful factors
If alignment transformations are applied to correct misalignment, then viewer comfort is improved, but the production time and processing complexity increase
Solution Approach 1:
The patent systematically adjusts key geometric parameters of the stereographic images including translation (shifting image position), rotation (adjusting image orientation), and scaling (modifying image size). By changing these parameters during processing, the alignment between left and right images is corrected to eliminate viewer discomfort while maintaining efficient production timelines.
3Reliability
If strict alignment is enforced between stereo images, then viewing comfort improves, but the flexibility in camera positioning and shot composition decreases
Solution Approach 1:
The patent applies dynamic transformation parameters that can be adjusted for each stereo pair independently. The translation, rotation, and scaling values are calculated based on the specific misalignment detected in each image pair, allowing flexible adaptation to different camera positions and shot compositions while ensuring proper alignment for viewer comfort.
Data Source
AI summary
Systems and methods according to principles disclosed here provide a screen space transform, e.g., implemented as a node, that may be employed to correct alignment issues between left and right eyes of a native stereo plate. The transformations may be in a number of homographic ways, including via translation, rotation, and scaling. By properly aligning stereographic images, subsequent images are properly aligned throughout the animation pipeline. In addition, the viewer experience is significantly improved.