Stereoscopic Display Rendering via Angular Direction Computation
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Solution Overview
Problem
Stereoscopic display apparatuses suffer from intensity modulation issues, such as 'dark bands,' and jagged edges due to the way light is directed to different viewing angles, affecting the perceived three-dimensional image quality.
Innovation Solution
The method involves determining multiple intermediate values based on different angular directions and coordinates of picture elements, combining these values to create a display value that accounts for depth disparity, using low-pass filtering to reduce jagged edges and intensity modulation, and optimizing the alignment of picture elements and optical directory elements to minimize artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple intermediate values based on different angular directions are used to compute display values, then jagged edges are reduced, but computational complexity increases
Solution Approach 1:
The patent applies low-pass filtering to the 3-D representation before rendering to pre-reduce high-frequency components that cause jagged edges. This preliminary processing step prepares the data in advance, reducing the need for complex post-processing and lowering overall computational complexity while maintaining image quality
Solution Approach 2:
The patent computes intermediate values for multiple angular directions (excessive action) rather than just the single required direction. By calculating values for several angles and combining them with appropriate weighting, the method achieves smoother rendering with reduced jagged edges, accepting increased computation as a trade-off for superior image quality
2Adaptability or versatility
If optical directory means direct light to multiple angular directions for stereoscopic viewing, then three-dimensional image is created, but intensity modulation and dark bands occur
Solution Approach 1:
The patent applies different filtering strengths to different regions of the 3-D representation based on their depth disparity. Objects with larger disparity (further from the reference plane) receive stronger low-pass filtering to reduce jagged edges, while objects closer to the reference plane receive minimal filtering. This localized adaptation maintains intensity uniformity across different viewing angles while preserving image quality
Solution Approach 2:
The patent modifies the rendering parameters by computing display values based on multiple angular directions and combining them with weighted averaging. This parameter change in the computation process smooths intensity variations and reduces dark bands across different viewing angles, achieving more uniform illumination while maintaining stereoscopic capability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces jagged edges and intensity modulation, enhancing the sharpness and clarity of three-dimensional images by aligning the display values with the angular directions and depth of objects, improving the overall image quality.
Implementation Method 1
optical directory means comprising a group of optical directory elements each of which is associated with a respective group of picture elements, the optical directory means overlying the picture elements in the first plane for directing the outputs of the picture elements in mutually different angular directions
Data Source
AI summary
A method of computing a display value to be provided to a stereoscopic display apparatus (150) is described. The method includes: determining a first intermediate value (811) from a 3-D representation on basis of a first one of the angular directions and coordinates of a first one of the picture elements (102); determining a second intermediate value (810) from the 3-D representation on basis of a further angular direction relative to the first plane and the coordinates of the first one of the picture elements; and combining the first intermediate value (811) and the second intermediate value (810) to the display value, the display value related to the particular output of a first one of the picture elements of the stereoscopic display apparatus (102).