Imaging Device White Balance Correction for Macro Shooting
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Solution Overview
Problem
Imaging devices struggle to maintain image quality when shooting subjects with high-intensity warm colors under low color temperature light sources, as current white balance correction methods often saturate colors, particularly in macro shooting and close-range photography, leading to undesirable image quality.
Innovation Solution
An imaging device with a macro shooting determination section and a low color temperature light source determination section, which calculates and switches between white balance correction coefficients to either add or remove the color of the light source based on the shooting environment and distance to the subject, allowing for automatic adjustment of white balance without complex operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If white balance correction is performed to leave the color of a low color temperature light source in the image, then the atmosphere of the shooting environment is preserved, but color saturation deteriorates when the subject includes high intensity warm colors
Solution Approach 1:
The patent applies local quality by making the white balance correction characteristic dependent on the shooting condition (macro or close-range). When macro or close-range shooting is detected, the system uses a white balance correction method that does not leave the light source color, while for other conditions it may leave the color. This localized adaptation resolves the contradiction by applying different correction strategies to different shooting scenarios.
Solution Approach 2:
The system dynamically switches between different white balance correction approaches based on the detected shooting condition. The white balance correction coefficient is adjusted in real-time based on whether macro or close-range shooting is detected, allowing the system to adapt its color correction behavior to prevent saturation when needed while preserving atmosphere when appropriate.
2Object-affected harmful factors
If a photographer manually determines whether to leave the color of the light source based on the subject color, then color reproducibility can be controlled, but the operation becomes complicated and difficult
Solution Approach 1:
The system performs self-service by automatically detecting whether macro or close-range shooting is occurring and autonomously selecting the appropriate white balance correction method. The camera's control unit detects the shooting condition and automatically adjusts the white balance correction coefficient without requiring the photographer to manually analyze the subject color or make decisions about color preservation, thus simplifying operation while maintaining color reproducibility.
Solution Approach 2:
The system uses feedback from the shooting condition detection (macro or close-range identification) to automatically adjust the white balance correction approach. This closed-loop control allows the system to respond to the actual shooting scenario and automatically prevent color saturation when high intensity warm color subjects are photographed, eliminating the need for complex manual determination.
3Reliability
If white balance correction is performed in macro shooting or close-range photography with low color temperature light sources, then the general white balance is improved, but the fresh look of food and raw fish deteriorates due to color saturation
Solution Approach 1:
The patent applies local quality by making the white balance correction characteristic dependent on the shooting condition (macro or close-range). When macro or close-range shooting is detected, the system uses a white balance correction method that does not leave the light source color, while for other conditions it may leave the color. This localized adaptation resolves the contradiction by applying different correction strategies to different shooting scenarios.
Solution Approach 2:
The system dynamically switches between different white balance correction approaches based on the detected shooting condition. The white balance correction coefficient is adjusted in real-time based on whether macro or close-range shooting is detected, allowing the system to adapt its color correction behavior to prevent saturation when needed while preserving atmosphere when appropriate.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables automatic white balance correction that maintains image quality by adjusting for low color temperature light sources during macro shooting and close-range photography, preventing color saturation and enhancing the freshness of images, especially for subjects like food and raw fish.
Implementation Method 1
an imaging element configured to convert light that has entered from an optical system into an electric signal, and to output the electric signal as an imaging signal
Data Source
AI summary
An imaging device includes an imaging element configured to convert light that has entered from an optical system into an electric signal, and to output the electric signal as an imaging signal, a macro shooting determination section configured to determine whether shooting is macro shooting or not, a low color temperature light source determination section configured to determine whether or not the shooting is performed in a lower color temperature light source based on color information, a first white balance correction coefficient calculator configured to calculate a white balance correction coefficient so as to obtain an image in which a color of the low color temperature light source is added, and a second white balance correction coefficient calculator configured to calculate a white balance correction coefficient so as to obtain an image in which the color of the low color temperature light source is not added in the lower color temperature light source and in the macro shooting.