Staggered Exposure Control for Parallel HDR Image Capture
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Solution Overview
Problem
Current high-dynamic range (HDR) image capture methods require sequential exposure of images, leading to longer total capture time and increased motion blur due to relative motion between the photosensitive array and the scene, which affects image quality and complexity in HDR image synthesis.
Innovation Solution
Configuring different exposure periods for photosensitive areas and determining staggered start exposure times, allowing parallel exposure to complete in the longest exposure period, thereby reducing offset and improving image quality and synthesis efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sequential exposure of multiple images is used for HDR capture, then image synthesis can be performed, but total capture time increases and motion blur increases
Solution Approach 1:
The photosensitive array is divided into multiple photosensitive areas, each capable of independent exposure control. This segmentation allows different regions to capture images with different exposure times simultaneously, enabling parallel processing of HDR capture while reducing total capture time and motion blur effects
Solution Approach 2:
The patent implements dynamic exposure time assignment where each photosensitive area can have a different exposure time length configured based on scene requirements. This dynamic control allows the system to optimize exposure parameters for different regions independently, maintaining image synthesis quality while reducing overall capture time
2Measurement precision
If sequential exposure of multiple images is used for HDR capture, then image synthesis can be performed, but motion blur increases due to relative motion
Solution Approach 1:
By segmenting the photosensitive array into multiple independently controllable areas, the system can capture multiple exposure frames simultaneously in parallel. This eliminates the time gap between frames that causes motion blur in sequential capture, while still providing the diverse exposure data needed for high-quality HDR synthesis
Solution Approach 2:
The patent configures different exposure times for different photosensitive areas in advance before capture begins. This preliminary configuration ensures that all required exposure data is collected simultaneously during a single exposure event, preventing motion blur from affecting the synthesis quality
3Productivity
If different exposure periods are configured for photosensitive areas, then exposure efficiency improves and capture time reduces, but exposure control complexity increases
Solution Approach 1:
The photosensitive array is segmented into multiple areas with independent exposure control, allowing each area to operate with optimized exposure parameters. This segmentation enables parallel exposure operations that improve efficiency while the modular structure makes the control complexity manageable through localized parameter settings
Solution Approach 2:
The system dynamically configures different exposure time parameters for different photosensitive areas based on the captured scene characteristics. This parameter differentiation allows the system to optimize exposure efficiency for various regions simultaneously, achieving high productivity while the parameter-based control approach keeps system complexity manageable
Data Source
AI summary
This application discloses an image capture control method and apparatus, and an image capture device, wherein the method comprises: configuring different exposure periods for at least two photosensitive areas of a photosensitive array; determining start exposure times of the photosensitive areas, wherein a start exposure time of a photosensitive area having a relatively long exposure period is earlier than a start exposure time of a photosensitive area having a relatively short exposure period, and exposure of the photosensitive areas is completed in a longest exposure period of the exposure periods; and controlling exposure of the corresponding photosensitive areas according to the determined exposure periods and the start exposure times of the exposure periods. This application can improve quality of an HDR image by using a total exposure time as short as possible.