Dual-Camera Image Processing for Extra-Large Aperture Clarity
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Solution Overview
Problem
Existing lens designs for portable devices face challenges in achieving an extra-large aperture (FNO < 1.6) due to increased aberration and manufacturing complexities, leading to high costs and low yield rates, making it difficult to integrate such lenses into devices like mobile phones or tablets.
Innovation Solution
Implementing a photographing module with two cameras, each with an F-number less than 1.6 and parallel optical axes, where each camera captures high-definition sub-images within specific field-of-view ranges, which are then fused to produce a high-definition image across the entire field-of-view using modulation transfer function thresholds and splicing algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture is increased to achieve extra-large aperture (FNO < 1.6), then the amount of admitted light and resolution are improved, but the aberration of imaging beam increases and manufacturing complexity increases exponentially
Solution Approach 1:
The patent divides the imaging task into multiple lenses, each responsible for a specific field-of-view range. By segmenting the optical system, each lens can be optimized for its specific range, reducing the overall complexity while achieving large aperture效果 across the entire field of view.
Solution Approach 2:
Each lens is designed with specific optical parameters optimized for its designated field-of-view range. This local optimization allows each lens to achieve high imaging quality in its specific range while maintaining manageable complexity for individual lens manufacturing.
2Manufacturing precision
If the quantity of lenses is increased to correct aberration and achieve clear imaging, then the imaging quality is improved, but the assembly difficulty increases and the optical system becomes more sensitive
Solution Approach 1:
Instead of using many lenses in a single complex assembly, the patent segments the imaging task across multiple simpler lens assemblies. Each lens assembly is independently optimized for a specific field-of-view range, reducing assembly complexity and sensitivity while maintaining high imaging quality.
3Illumination intensity
If a single lens is designed to achieve large aperture with clear imaging across entire field of view, then the aperture is enlarged, but the quantity of lenses is limited to 6 or fewer due to production process constraints
Solution Approach 1:
The patent divides the field of view into multiple ranges, with each lens responsible for a specific segment. This segmentation allows the use of simpler lens designs with fewer elements (6 or fewer per lens), improving manufacturing yield rate while collectively achieving large aperture效果 across the entire field of view through the combination of multiple lenses.
Data Source
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AI summary
The present invention discloses an image processing method, an apparatus, and a device. The method is applied to a terminal having two specially manufactured cameras, where a first camera and a second camera are specially customized to implement an extra-large aperture in an existing process at the expense of sacrificing definition of an image obtained in a local field-of-view range, so that an image photographed in some regions satisfies a quality requirement of an extra-large aperture. A first sub-image that is of a to-be-photographed object and that is photographed by the first camera is obtained, where a corresponding field-of-view range is [0, θ1]; a second sub-image that is of the to-be-photographed object and that is photographed by the second camera is obtained, where a corresponding field-of-view range is [θ2, θ3], and quality of the first sub-image and the second sub-image satisfies a definition requirement of an extra-large aperture; and the first sub-image and the second sub-image are spliced and fused to obtain a target image that has a larger field-of-view range and satisfies the extra-large aperture.