Holographic Image Quality Measurement Using Superimposed Focus
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Solution Overview
Problem
Current technologies lack effective methods for objectively measuring the quality of holographic images, which express multiple depth planes and viewpoints, making it difficult to evaluate their quality compared to traditional 2D images.
Innovation Solution
An apparatus and method that reconstructs hologram images, generates a superimposed focus image by collecting in-focus areas from multiple depth planes, and evaluates the quality, sense of depth, and view angle of the hologram image, allowing for both objective and subjective assessments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional 2D image quality measurement methods are used for holographic images, then the measurement process is simple, but the measurement precision is insufficient because holographic images have multiple depth planes and viewpoints that cannot be evaluated by conventional metrics
Solution Approach 1:
The patent segments the holographic image evaluation into multiple depth planes, reconstructing and analyzing each depth layer separately. This allows precise quality measurement of specific focal planes while maintaining the overall complexity manageable through systematic processing of individual segments.
Solution Approach 2:
The patent introduces depth as an additional dimension for quality assessment by reconstructing holographic images at multiple focal distances. This transforms the traditional 2D image quality metric into a 3D-aware evaluation system that accounts for depth-of-field characteristics specific to holographic content.
2Reliability
If holographic images are reconstructed for all depth planes, then the comprehensive quality evaluation is improved, but the processing time and computational resources increase significantly
Solution Approach 1:
The patent applies partial action by selectively evaluating representative depth planes rather than processing every possible focal distance. This approach achieves sufficient quality assessment reliability by focusing on key depth layers that characterize the holographic image quality without the excessive time cost of complete depth-plane analysis.
Solution Approach 2:
The patent performs preliminary analysis to identify representative depth planes before conducting full quality evaluation. This preliminary step allows the system to focus computational resources on the most informative depth layers, reducing overall processing time while maintaining evaluation comprehensiveness.
3Measurement precision
If intensity correction is applied to all reconstructed images, then the measurement precision is improved, but the processing complexity and time increase
Solution Approach 1:
The patent applies local quality correction by performing intensity normalization only on specific regions or representative depth planes rather than uniformly processing all reconstructed images. This maintains measurement precision in critical areas while improving processing efficiency by limiting correction operations to where they are most needed.
Data Source
AI summary
Provided is an apparatus for measuring a quality of a holographic image. The apparatus includes: a hologram image reconstruction unit configured to perform a hologram image; a superimposed focus image generation unit configured to collect an area that is in focus from reconstructed images and superimpose into a single image; and a hologram image quality measurement unit configured to perform an image quality evaluation for the superimposed focus image.