Stereoscopic Camera System for Head-Tilt Parallax Correction

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Solution Overview

Problem

Current methods for capturing and displaying stereoscopic images in virtual reality fail to maintain a realistic stereoscopic view when the viewer tilts their head, leading to distortion and loss of parallax experience due to the lack of proper left and right eye views accounting for vertical parallax effects.

Innovation Solution

An apparatus and method that capture stereoscopic image data for both horizontal and off-horizontal orientations, using multiple pairs of camera lenses oriented relative to the horizon line, and process the data to blend pixel views proportionate to the tilt angle of the head-mounted display unit, ensuring accurate parallax representation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If only horizontal stereoscopic views are captured, then the system complexity is reduced, but the viewing experience deteriorates when the head is tilted

Engineering Contradiction:
Improvecamera system complexityVSAvoidstereoscopic view quality when head is tilted
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The camera system is segmented into multiple pairs of lenses (first pair for horizontal views, second pair for off-horizontal views), each capturing stereoscopic images from different orientations. This segmentation allows the system to provide comprehensive coverage for various head tilt angles without requiring an overly complex single-system solution.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The camera apparatus is designed with multi-functionality by incorporating both horizontal and off-horizontal viewing pairs, enabling it to serve multiple viewing conditions (upright and tilted head positions) simultaneously. This universal design ensures reliable stereoscopic viewing experience across different head orientations.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If multiple pairs of camera lenses are used to capture both horizontal and off-horizontal views, then the stereoscopic viewing experience when head is tilted is improved, but the device complexity increases

Engineering Contradiction:
Improvestereoscopic view quality when head is tiltedVSAvoidcamera system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The camera system is segmented into multiple pairs of lenses (first pair for horizontal views, second pair for off-horizontal views), each capturing stereoscopic images from different orientations. This segmentation allows the system to provide comprehensive coverage for various head tilt angles without requiring an overly complex single-system solution.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system extends from a single horizontal dimension to multiple dimensional orientations by adding off-horizontal viewing pairs. This dimensional expansion captures vertical parallax effects, enabling accurate stereoscopic rendering for tilted head positions while maintaining manageable system complexity through structured multi-pair architecture.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Device complexity

If pixel blending is not performed, then the processing complexity is reduced, but the image quality deteriorates when the head is tilted

Engineering Contradiction:
Improveprocessing system complexityVSAvoidimage quality and realism
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The system performs preliminary pixel blending operations during the image processing stage, combining pixels from horizontal and off-horizontal views according to the detected head tilt angle. This preliminary action ensures that the final rendered image maintains high quality and realism for tilted head positions without requiring complex real-time adjustments during display.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The processing system dynamically changes blending parameters based on the detected head tilt angle, adjusting the proportion of horizontal and off-horizontal pixels mixed together. This parameter adaptation maintains optimal image quality across different viewing conditions while using computationally efficient blending algorithms.

Inventive Principle:
Principle #35Parameter changes

4Manufacturing precision

If pixel blending and morphing are performed, then the image quality and realism are improved, but the processing time and complexity increase

Engineering Contradiction:
Improveimage quality and realismVSAvoidprocessing time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The system performs preliminary pixel blending operations during the image processing stage, combining pixels from horizontal and off-horizontal views according to the detected head tilt angle. This preliminary action ensures that the final rendered image maintains high quality and realism for tilted head positions without requiring complex real-time adjustments during display.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The processing system dynamically changes blending parameters based on the detected head tilt angle, adjusting the proportion of horizontal and off-horizontal pixels mixed together. This parameter adaptation maintains optimal image quality across different viewing conditions while using computationally efficient blending algorithms.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS10742950B2Collecting and processing stereoscopic digital image data to produce a parallax corrected tilted head view
Publication Date: 2020.08.11 NVIDIA CORP
  • US10742950B2 patent drawing
  • US10742950B2 patent drawing
  • US10742950B2 patent drawing

AI summary

An apparatus for capturing digital stereoscopic images of a scene. The apparatus comprises a first pair of separated camera lens oriented such that a first imaginary line between the first pair of lens is substantially parallel with a horizon line a scene, wherein digital image data is capturable through the first pair of camera lens and storable in two separate digital image data bases corresponding to a left-eye horizontal view and a right-eye horizontal view respectively. The apparatus comprises a second pair of separated camera lens oriented such that a second imaginary line between the second pair of lens is substantially non-parallel with the horizon line, wherein digital image data is capturable through the second pair of camera lens and storable in two separate digital image data bases corresponding to a left-eye off-horizontal view and a right-eye off-horizontal view respectively.