Image Sensor Flicker Correction via Dynamic Frame Count Adjustment
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Solution Overview
Problem
Existing image correction methods struggle to accurately correct flicker components in images captured under fluorescent lighting due to abrupt changes in the driving state of image sensors, leading to inadequate or adverse effects on image quality.
Innovation Solution
An image processing apparatus that dynamically adjusts the driving state of the image sensor and includes a flicker correction unit, which detects flicker components from previous frames to generate correction values based on detected flicker components and control information, allowing for precise correction of flicker even when the driving state changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed number of past frames are used for flicker detection, then the detection process is simple, but the correction becomes inaccurate when driving state changes occur
Solution Approach 1:
The patent applies dynamics by making the number of past frames used for flicker detection variable rather than fixed. The flicker correction unit dynamically adjusts the number of frames to reference based on detection results, allowing the system to adapt to changing driving states while maintaining accurate flicker detection. This resolves the contradiction by enabling high measurement precision without requiring overly complex predetermined rules.
Solution Approach 2:
The patent implements feedback by using the detection results to iteratively adjust the flicker correction process. The flicker correction unit references a variable number of past frames based on detection outcomes, creating a feedback loop that continuously optimizes correction accuracy. This feedback mechanism enables precise flicker correction while keeping the detection process relatively simple.
2Measurement precision
If the number of past frames for flicker detection is increased, then flicker correction accuracy improves, but processing time increases
Solution Approach 1:
The patent applies dynamics by making the number of past frames variable rather than fixed. The system dynamically determines the appropriate number of frames to reference based on detection results, allowing it to use more frames when needed for higher accuracy while using fewer frames when processing speed is prioritized. This resolves the contradiction between measurement precision and time loss.
Solution Approach 2:
The patent changes the parameter of frame count dynamically during operation. By adjusting the number of past frames referenced based on detection results and driving state changes, the system can optimize the balance between correction accuracy and processing time. This parameter change approach enables flexible trade-offs between precision and speed.
3Stability of the object's composition
If flicker correction is applied using a fixed reference method, then the correction process is stable, but it cannot adapt to abrupt changes in driving state
Solution Approach 1:
The patent applies dynamics by making the flicker correction process adaptive rather than static. The system dynamically adjusts the number of past frames to reference based on detection results and driving state changes, enabling it to adapt to abrupt changes while maintaining overall process stability. This resolves the contradiction between stability and adaptability.
Solution Approach 2:
The patent implements feedback by continuously monitoring detection results and adjusting the correction process accordingly. When driving state changes are detected, the system modifies its correction approach by referencing an appropriate number of past frames, creating a feedback-driven adaptive system. This feedback mechanism maintains stability while enabling adaptability to changing conditions.
4Adaptability or versatility
If the driving state of the image sensor is changed rapidly, then the imaging flexibility increases, but the flicker component changes significantly making correction difficult
Solution Approach 1:
The patent applies dynamics by making the flicker detection and correction process adaptive to rapid driving state changes. The system dynamically adjusts the number of past frames to reference based on the current driving state and detection results, enabling it to maintain correction precision even when imaging flexibility requires rapid state changes. This resolves the contradiction between adaptability and measurement precision.
Solution Approach 2:
The patent changes parameters dynamically in response to driving state changes. By adjusting the number of reference frames and correction parameters based on current operating conditions, the system maintains measurement precision while allowing rapid driving state changes for imaging flexibility. This parameter adaptation resolves the contradiction between versatility and precision.
Data Source
AI summary
An image processing apparatus includes a change unit configured to change a driving state of an image sensor for capturing an image signal in response to an operation for changing the driving state of the image sensor, and a flicker correction unit configured to correct an image signal based on a flicker component detected from image signals of a frame captured a predetermined number of frames before the frame of the image signal to be corrected, wherein the flicker correction unit is configured to change the predetermined number when the driving state of the image sensor is changed by the change unit.