Multiview Image Display Depth Adjustment and Cyclic Mapping
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Solution Overview
Problem
Glassless-type multiview image display systems experience distortion and visual fatigue due to dead zones and crosstalk issues, particularly in pseudo stereo sections where viewing positions switch abruptly, leading to a suboptimal 3D image rendering.
Innovation Solution
A multiview image display apparatus and method that adjusts the depth values of objects within a saliency region to a preset range, using a depth adjuster and controller to minimize distortion by aligning depth values with those of adjacent objects and the focal plane, and arranging multiview images in specific patterns to reduce sharp changes in disparity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If linear mapping method is used to display multiview images, then the mapping process is simple, but dead zones occur and sharp disparity changes cause crosstalk and visual fatigue
Solution Approach 1:
The patent applies parameter changes by transforming the mapping sequence from linear order to cyclic order, where views are arranged in a sequence that returns to the beginning (e.g., 1-2-3-4-5-6-1-2-3...). This parameter change in the mapping sequence eliminates dead zones and prevents sharp disparity changes at transition points, thereby resolving the crosstalk and visual fatigue issues while maintaining simplicity in the mapping process.
2Reliability
If cyclic mapping method is used to alleviate sharp disparity changes, then crosstalk is reduced, but images are displayed in inverted order causing distortion and viewing fatigue
Solution Approach 1:
The patent introduces asymmetry by selectively inverting only the second half of the view sequence while keeping the first half in normal order. For example, with 7 views, the sequence becomes 1-2-3-4-3-2-1, where views 1-4 are in normal order and views 4-1 are in inverted order. This asymmetric arrangement reduces crosstalk by avoiding sharp disparity changes while preventing the complete inversion that causes distortion and viewing fatigue.
3Manufacturing precision
If depth values of objects in saliency region are adjusted to preset range, then distortion is minimized, but processing complexity increases
Solution Approach 1:
The patent applies local quality by selectively adjusting depth values only for objects located in the saliency region (foreground objects that are most likely to cause distortion) while leaving background objects unchanged. The controller identifies the saliency region and applies depth adjustment algorithms only to objects within this region, thereby achieving precise distortion control with reduced processing complexity compared to adjusting all objects in the image.
Data Source
AI summary
A multiview image display apparatus is disclosed. A multiview image display apparatus includes: a depth adjuster configured to adjust a depth of an input image; a renderer configured to render a multiview image based on the image in which the depth is adjusted; a display configured to display the multiview image in a preset arrangement pattern; and a controller configured to control the depth adjuster in order to extract a saliency region of a user from the input image and adjust a depth value of an object included in the saliency region to a depth value of a preset range.