Fundus and 3D Eyeball Image Alignment for Precise Region Marking
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Solution Overview
Problem
Existing ophthalmic imaging systems struggle to accurately align and display tomographic images with two-dimensional fundus images, making it difficult to identify specific regions of interest on the eye.
Innovation Solution
The system integrates a processor to display both two-dimensional and three-dimensional images of the eye, allowing for the alignment of regions between these images using marks, enabling precise alignment and display of corresponding regions in both views.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tomographic images are displayed without alignment marks, then the display is simpler, but the precision of region identification deteriorates
Solution Approach 1:
The patent introduces alignment marks as intermediary elements that mediate between the tomographic image data and the two-dimensional fundus image. These marks serve as reference points that enable precise spatial correspondence without requiring complex transformation algorithms, thus improving region identification precision while maintaining display simplicity.
Solution Approach 2:
The patent creates a simplified two-dimensional representation (copy) of the three-dimensional tomographic image by projecting it onto the fundus image plane using alignment marks. This copying approach allows precise region identification without displaying the full complexity of the three-dimensional data structure.
2Measurement precision
If alignment marks are added to improve region correspondence, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent segments the image processing task into distinct components: placing alignment marks on the tomographic image, placing corresponding marks on the two-dimensional fundus image, and using these marks for region correspondence. This segmentation simplifies the overall processing complexity by breaking down the alignment problem into manageable discrete steps.
Solution Approach 2:
The patent performs preliminary action by pre-placing alignment marks on both the tomographic and two-dimensional images before the actual region correspondence analysis. This preliminary marking step establishes the spatial relationship in advance, eliminating the need for complex real-time calculation during region identification.
3Loss of information
If both two-dimensional and three-dimensional images are displayed together, then information completeness improves, but ease of operation deteriorates
Solution Approach 1:
The patent merges the two-dimensional fundus image and the three-dimensional tomographic image into a single integrated display by superimposing alignment marks from both images. This combining approach allows complete information display while maintaining ease of operation, as the aligned marks provide intuitive visual guidance for region correspondence without requiring the user to mentally register separate images.
Data Source
AI summary
An image display method executed by a processor comprises displaying a screen including a two-dimensional fundus image of an examined eye and a three-dimensional eyeball image of the examined eye, finding a second region in the three-dimensional eyeball image that corresponds to a first region specified in the two-dimensional fundus image, and displaying a mark indicating the second region in the three-dimensional eyeball image.