Ophthalmic OCT Front-Image Deformation for Simpler 3D Viewing
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Solution Overview
Problem
Existing methods for stereoscopically observing the front image of a subject's eye using optical coherence tomography (OCT) are complex and require complicated processing, making them inefficient.
Innovation Solution
An ophthalmic information processing apparatus that specifies the three-dimensional position of each pixel in a two-dimensional front image based on OCT data and deforms the two-dimensional image to generate a three-dimensional front image, simplifying the stereoscopic observation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing methods for stereoscopically observing the front image using OCT are used, then stereoscopic observation capability is achieved, but the processing complexity increases significantly
Solution Approach 1:
The patent creates a virtual three-dimensional front image by copying and transforming pixel information from the two-dimensional OCT image. Each pixel's position and intensity are copied and placed into corresponding positions in a three-dimensional coordinate system, generating a pseudo-3D representation that enables stereoscopic observation without requiring complex physical imaging systems.
Solution Approach 2:
The patent transforms the two-dimensional OCT image into a three-dimensional representation by adding depth information. Pixel positions in the original 2D image are mapped to three-dimensional coordinates (x, y, z) where the z-axis represents depth or axial position, creating a volumetric rendering that enables stereoscopic display and observation.
2Measurement precision
If complex processing is applied to achieve stereoscopic observation, then three-dimensional morphology is revealed, but processing time and efficiency decrease
Solution Approach 1:
The patent replaces complex mechanical or computational geometry processing with a direct pixel-based coordinate transformation system. Instead of using complex 3D modeling or iterative reconstruction algorithms, the method directly maps pixel positions from the 2D OCT image to 3D coordinates using established geometric relationships, significantly simplifying the computation while maintaining accuracy.
Solution Approach 2:
The patent performs preliminary coordinate transformation and image rendering in advance, creating the three-dimensional front image data structure before actual observation. By pre-computing the 3D pixel positions and intensities based on the 2D OCT image geometry, the system avoids time-consuming real-time processing during observation, improving overall efficiency.
Data Source
AI summary
An ophthalmic information processing apparatus includes a specifying unit and an image deforming unit. The specifying unit is configured to specify a three-dimensional position of each pixel in a two-dimensional front image depicting a predetermined site of a subject's eye, based on OCT data obtained by performing optical coherence tomography on the predetermined site. The image deforming unit is configured to deform the two-dimensional front image, by changing position of at least one pixel in the two-dimensional front image based on the three-dimensional position, to generate a three-dimensional front image.