Flash Brightness Variation Correction in Continuous Shooting
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Solution Overview
Problem
Continuous shooting with flash emission leads to variations in brightness between images due to missing or varying light emission, causing deterioration in the connection between consecutive images.
Innovation Solution
An image processing apparatus that acquires images shot during continuous shooting, detects light emission variations, sets parameters for a virtual light source to correct brightness variations, and applies relighting processing to maintain consistent image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous shooting with flash emission is performed, then productivity is improved, but brightness consistency deteriorates due to light emission variation
Solution Approach 1:
The system performs preliminary detection of flash light emission values before image processing, stores these values, and uses them to determine correction amounts. This preliminary action allows the system to pre-calculate compensation values for brightness variation, enabling continuous shooting to proceed at full speed while maintaining brightness consistency through subsequent correction based on the pre-detected flash emission data
Solution Approach 2:
The system detects actual flash light emission values for each shot, compares them against reference values, and uses the detected variation to dynamically determine correction amounts for the virtual light source parameters. This feedback mechanism ensures that brightness consistency is maintained by continuously adjusting the correction based on actual flash performance, resolving the contradiction between high-speed continuous shooting and brightness reliability
2Productivity
If flash emission is used for continuous shooting, then productivity is improved, but image quality uniformity deteriorates due to missing or varying light emission
Solution Approach 1:
The system changes the parameters of the virtual light source (position, intensity, angle) based on detected flash light emission variations. By dynamically adjusting these parameters according to the actual flash performance of each shot, the system compensates for brightness variations and maintains image quality uniformity across the continuous shooting sequence, resolving the contradiction between shooting speed and image quality consistency
Data Source
AI summary
An image processing apparatus comprises a first acquisition unit configured to acquire an image shot by continuous shooting while emitting a flash; a second acquisition unit configured to acquire light emission information of the flash in the continuous shooting; a detection unit configured to detect a light emission variation of the flash based on the light emission information; a setting unit configured to set a parameter of a virtual light source for correcting a variation of brightness of the image shot by the continuous shooting due to the light emission variation based on a result of detecting the light emission variation; and a correction unit configured to correct the image shot by the continuous shooting based on the set parameter of the virtual light source.