Image Capturing Device Flicker Suppression via Dynamic Frame Cycle Control
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Solution Overview
Problem
Video capturing mode for static image extraction is susceptible to the influence of light source flicker, leading to dark or tinted frames due to short exposure times, with existing techniques failing to effectively suppress flicker in this context.
Innovation Solution
An image capturing device with a processor that detects flicker and adjusts the frame cycle of video data capture, changing it to a shorter cycle when flicker is detected, and generates additional video data with adjusted frame cycles and phase information for improved flicker suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the exposure time for one frame is set short to capture momentary scenes in video capturing mode, then the ability to capture fast-moving subjects is improved, but the influence of light source flicker increases causing dark pictures or tint deterioration
Solution Approach 1:
The patent applies dynamics by making the frame cycle adjustable based on detection results. The system dynamically switches between a first frame cycle (longer) and a second frame cycle (shorter) depending on whether flicker is detected, allowing the capture system to adapt its timing characteristics to the lighting conditions rather than using a fixed cycle
Solution Approach 2:
The patent changes the frame cycle parameter from a fixed value to a variable that can take two different values. When flicker is detected, the system changes from using the first frame cycle to the second frame cycle, effectively using parameter variation to resolve the contradiction between short exposure needs and flicker suppression
2Productivity
If the frame cycle is shortened to capture more frames for static image extraction, then the number of available frames increases, but the probability of capturing frames with suppressed flicker influence decreases
Solution Approach 1:
The patent segments the frame capture process into two distinct modes with different frame cycles. Instead of using a single uniform frame cycle for all captures, the system divides the operation into captures using the first frame cycle and captures using the second frame cycle, selecting the appropriate segment based on flicker detection results
Solution Approach 2:
The patent implements feedback by detecting flicker from captured video data and using this detection result to control the frame cycle for subsequent captures. The detection section analyzes the video data to determine if flicker is present, and this information feeds back to the frame cycle control, which adjusts the capture timing accordingly
Data Source
AI summary
An image capturing device includes an image capturing section that captures first video data having a frame cycle of a first frame cycle and an exposure time for one frame shorter than the first frame cycle, an image acquisition section that acquires the first video data captured by the image capturing section, a detection section that detects a flicker of a light source in the first video data, and an image capturing frame cycle control section that controls the frame cycle of the image capturing in the image capturing section. The image capturing frame cycle control section changes the frame cycle of the first video data captured by the image capturing section from the first frame cycle to a second frame cycle, which is a frame cycle shorter than the first frame cycle, in a case where the detection section detects the flicker.