Imaging Device Flicker Detection Region Adjustment
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Solution Overview
Problem
Existing imaging devices face difficulties in easily detecting and canceling flicker caused by light sources with high-frequency flicker, making it challenging for users to synchronize shutter speed with flicker frequency, especially with LED light sources.
Innovation Solution
An imaging device with an image sensor and a processor that divides the imaging range into regions, performs photometry, and detects flicker streaks, adjusting the region size to detect flicker streaks effectively, allowing for determination of flicker frequency and cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the imaging device uses a synchroscan function to inhibit flicker streaks, then flicker cancellation is achieved, but the operation becomes difficult and time-consuming as users must manually find fine streak patterns and adjust shutter speed
Solution Approach 1:
The imaging device automatically detects flicker streaks and determines flicker frequency without user intervention. The processor autonomously analyzes pixel signals, divides imaging ranges into regions, and identifies flicker patterns, eliminating the need for users to manually find streak patterns or adjust shutter speeds.
Solution Approach 2:
The device performs preliminary flicker detection by analyzing pixel signals and dividing the imaging range into multiple regions before capturing the final image. This preliminary analysis allows the system to identify flicker streaks and determine appropriate shutter speeds in advance, so users can directly use the determined settings without manual adjustment.
2Measurement precision
If the device divides the imaging range into multiple regions for photometry, then flicker detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The imaging range is divided into multiple regions for photometry to improve flicker detection accuracy. By segmenting the imaging area, the processor can analyze brightness variations in each region independently, making it easier to detect flicker streaks and determine their characteristics with higher precision.
Solution Approach 2:
The processor performs photometry on multiple divided regions, which may be more divisions than strictly necessary for basic detection. This excessive division ensures that even subtle or localized flicker patterns are captured, improving detection reliability while the systematic approach keeps processing manageable.
3Measurement precision
If the device reduces the area of divided regions when flicker streaks are not detected, then detection sensitivity is improved, but the processing time and complexity increase
Solution Approach 1:
The area of divided regions is dynamically adjusted based on detection results. When flicker streaks are not detected in the current configuration, the processor automatically reduces the area of divided regions and re-detects. This dynamic adaptation continues until flicker is detected or a minimum threshold is reached, optimizing detection sensitivity while managing processing time through iterative refinement.
Data Source
AI summary
An imaging device, comprising: an image sensor that forms a subject image by means of an optical system, and a processor that comprises a flicker streak detection section and a determination section, wherein the flicker streak detection section divides an imaging range of the image sensor into a plurality of regions, performs photometry of the regions that have been divided based on an pixel signal output by the image sensor, and detects divided regions in which it is expected that flicker streaks exist, and the determination section determines whether or not it was possible to detect flicker streaks using the flicker streak detection section, wherein the flicker streak detection section, in a case where it has been determined by the determination section that it was not possible to detect flicker streaks, reduces area of the divided regions and detects divided regions in which it is expected that flicker streaks will exist.