Dual Digital Image Stabilization for Preview and Stored Images
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Solution Overview
Problem
Existing image stabilization methods in electronic devices, such as digital cameras and smartphones, face challenges in effectively compensating for camera shake during image capture, particularly in distinguishing between intentional and unintentional device movements, leading to suboptimal image quality in both preview and stored images.
Innovation Solution
The implementation of a dual Digital Image Stabilization (DIS) approach, where a first-type DIS (DIS1) provides real-time shake compensation for preview images based on previous and current frames, and a second-type DIS (DIS2) offers stronger compensation for stored images by using previous, current, and next frames, distinguishing between preview and storage image processing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single Digital Image Stabilization (DIS) method is used for both preview and stored images, then the processing is simplified, but the image stability and quality are suboptimal because the same compensation cannot effectively address both real-time preview requirements and final storage quality requirements
Solution Approach 1:
The patent divides the image stabilization processing into two distinct types: first-type DIS for preview images and second-type DIS for stored images. This segmentation allows each processing path to be optimized independently - the first-type DIS provides real-time stabilization for preview while the second-type DIS provides enhanced stabilization for final storage, resolving the contradiction between image quality and processing complexity by treating them as separate functions rather than a single unified process
2Manufacturing precision
If stronger shake compensation is applied to all images, then image stability is improved, but processing time and computational load increase, affecting real-time preview performance
Solution Approach 1:
The patent implements dynamic processing strategies where the first-type DIS uses a lighter computational approach suitable for real-time preview with faster processing speed, while the second-type DIS applies more intensive shake compensation algorithms for stored images where processing time is less critical. This dynamic adaptation of processing intensity to different operational contexts resolves the contradiction between strong compensation and processing time
3Speed
If real-time processing is prioritized for preview images, then preview responsiveness is improved, but the compensation accuracy is reduced compared to post-processing stored images
Solution Approach 1:
The patent applies partial action by implementing two levels of DIS processing - the first-type DIS provides sufficient stabilization for real-time preview where speed is prioritized, while the second-type DIS provides excessive (enhanced) stabilization for stored images where accuracy is prioritized. This partial application of different processing intensities to different output requirements resolves the contradiction between speed and accuracy
Data Source
AI summary
According to aspects of the disclosure, a method is provided for use in an electronic device, comprising: capturing one or more image frames by using at least one image sensor of the electronic device; displaying, on a display, a first image that is generated by performing a first-type Digital Image Stabilization (DIS1) based on at least some of the image frames; and storing, in a memory, a second image generated by performing a second-type Digital Image Stabilization (DIS2) based on at least some of the image frames.