Multi-view Image Display Depth Adjustment for Swim Effect Reduction
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Solution Overview
Problem
Glasses-free 3D display systems experience issues with 'swim effect' and visual fatigue due to drastic changes in disparity and pseudo stereo effects, particularly in cyclic mapping methods, which affect the viewing experience and lead to discomfort for users.
Innovation Solution
A multi-view image display apparatus and method that adjusts the depth of input images using a depth adjuster and controller to shift objects based on depth information and pixel size, minimizing the 'swim effect' by arranging views in specific patterns and adjusting depth values to align objects with the focal plane, thereby reducing pseudo stereo occurrences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclic mapping method is used to reduce drastic change in disparity, then swim effect occurs due to reverse order arrangement, but linear mapping method causes dead zone and severe crosstalk
Solution Approach 1:
The patent adjusts depth parameters of specific objects in the multi-view image to minimize swim effect. The controller identifies objects that cause swim effect in pseudo stereo sections and modifies their depth values to reduce the effect while maintaining the cyclic mapping arrangement pattern.
Solution Approach 2:
The patent performs preliminary depth adjustment on objects before displaying the multi-view image. The controller pre-identifies objects that will cause swim effect in reverse order sections and adjusts their depth values in advance, preventing the swim effect from occurring during viewing.
2Adaptability or versatility
If multiple multi-view images are generated for glasses-free system, then 3D viewing is enabled, but drastic change in disparity causes dead zone and crosstalk
Solution Approach 1:
The patent modifies depth parameters of objects in multi-view images to prevent drastic disparity changes. By adjusting depth values of specific objects, the system maintains viewing continuity across different view positions while preserving glasses-free 3D viewing capability.
Solution Approach 2:
The patent applies beforehand cushioning by pre-adjusting depth values of objects that would cause dead zones or crosstalk. The controller identifies potential problem areas in the view mapping and compensates for disparity changes in advance, ensuring smooth transitions between views.
3Reliability
If views are arranged in reverse order to reduce disparity change, then swim effect occurs in pseudo stereo section, but forward order causes dead zone
Solution Approach 1:
The patent selectively changes depth parameters of objects in pseudo stereo sections where reverse order arrangement causes swim effect. The controller modifies depth values of specific objects to minimize swim effect while maintaining the reverse order arrangement that provides disparity stability.
Solution Approach 2:
The patent applies local quality by treating objects in pseudo stereo sections differently from other sections. The controller identifies specific objects in reverse order sections and adjusts only their depth parameters, leaving other objects unchanged, thereby locally optimizing for swim effect reduction.
Data Source
AI summary
A multi-view image display apparatus is disclosed. The multi-view image display apparatus includes a depth adjuster configured to adjust depth of an input image, a rendering unit configured to perform rendering of a multi-view based on the depth-adjusted image, a display configured to arrange and display the multi-view image according to an arrangement pattern, and a controller configured to control the depth adjuster to shift depth of the input image so that an object satisfying a criterion has a depth value, based on depth information of at least one object included in the input image.