Stable Shake Correction for Frame-Sequential RGB Images
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Solution Overview
Problem
Existing image processing technologies for frame-sequential moving images struggle with accurate shake correction across multiple color channels, leading to color shifts and inaccuracies in generating stable and synchronized RGB-format moving-image frames.
Innovation Solution
A frame-sequential-type image processing device and method that calculates movement amounts and shake correction amounts for each color channel, using a stable-shake-correction-amount calculating unit to combine shake correction data across channels, reducing positional differences and color shifts by weighting shake correction amounts from different channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shake correction processing is performed separately for each color channel based on individual movement amounts, then shake correction can be applied to each channel, but color shifts occur due to positional differences between channels
Solution Approach 1:
The patent combines shake correction amounts from multiple color channels (R, G, B) into a single integrated correction value. The stable shake correction amount calculation unit merges the shake correction amounts calculated for each channel, using weighted averaging or median selection to produce a unified correction value that is applied to all channels, thereby eliminating color shifts caused by independent channel corrections.
Solution Approach 2:
The stable shake correction amount calculation unit acts as an intermediary between the individual channel shake correction calculations and the final composite image generation. It receives shake correction amounts from each color channel, processes them to determine a stable correction value, and outputs this unified correction amount to be applied consistently across all channels, mediating the conflict between channel-specific correction and color alignment.
2Measurement precision
If movement amounts are calculated from latest frame and past frame in the same color channel, then accurate channel-specific motion detection is achieved, but synchronization errors occur between color channels
Solution Approach 1:
The patent implements a universal shake correction amount that serves all color channels simultaneously. Instead of maintaining separate correction amounts for each channel, the stable shake correction amount calculation unit produces a single correction value that is universally applied to R, G, and B frames, ensuring that the same correction is used across all channels to maintain synchronization while still benefiting from accurate per-channel movement detection.
3Device complexity
If shake correction amounts are calculated independently for each color channel, then processing can be simplified, but color shifts and instability increase
Solution Approach 1:
The patent performs preliminary calculation of shake correction amounts for each color channel before combining them. The movement amount calculation unit and shake correction amount calculation unit compute channel-specific values in advance, which are then fed to the stable shake correction amount calculation unit for integration. This preliminary per-channel processing maintains accuracy while the subsequent combination step ensures stability and reduces complexity.
Data Source
AI summary
An image processing device includes: a movement-amount calculating unit that calculates a movement amount of an object image between a latest frame and a past frame in the same color channel; a shake-correction-amount calculating unit that calculates a shake correction amount for the latest frame on the basis of the movement amount; a stable-shake-correction-amount calculating unit that calculates a stable shake-correction amount for the latest frame; a shake correcting unit that performs shake correction processing on the latest frame on the basis of the stable shake-correction amount; and a storage unit that stores the stable shake-correction amount, wherein the stable-shake-correction-amount calculating unit calculates the stable shake-correction amount for the latest frame on the basis of the shake correction amount for the latest frame and a stable shake-correction amount for a frame in a different color channel from the latest frame, stored in the storage unit.