Flash Lamp Color Temperature Correction via Gray Point Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current flash lamp systems face significant correction errors in managing and controlling color temperature, limiting the accuracy of light compensation, especially when the environment light is insufficient, and existing methods to reduce these errors increase costs.
Innovation Solution
A method and device that calculate and correct the color temperature of a flash lamp by comparing the color temperature values of a gray point region in an image captured with the flash lamp closed to the same region in an image captured with the flash lamp open, adjusting parameters to align the flash lamp's color temperature with the environment light, and sharing the adjusted curve for consistent light compensation across multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bin region of a color temperature block is reduced to decrease correction error, then the correction precision is improved, but the device complexity and cost increase
Solution Approach 1:
The patent divides the color temperature correction process into two segments: environment light color temperature detection (using gray point region) and flash lamp color temperature detection (using corresponding image region). This segmentation allows each segment to be optimized independently, achieving high precision without requiring excessive subdivision of the entire color temperature range into small bins.
Solution Approach 2:
The patent introduces a color temperature difference value as an intermediary parameter that represents the relationship between environment light and flash lamp. This intermediary simplifies the correction process by focusing on the relative difference rather than absolute values, reducing the complexity of bin region management while maintaining correction precision.
2Measurement precision
If the range for managing and controlling color temperature of a single lamp is reduced, then the correction error is reduced, but the adaptability decreases
Solution Approach 1:
The patent implements dynamic color temperature correction by continuously detecting the color temperature difference between environment light and flash lamp, and adjusting the flash lamp's color temperature in real-time. This dynamic approach allows the system to adapt to different lighting conditions while maintaining small correction ranges, achieving both precision and adaptability.
Solution Approach 2:
The patent establishes a feedback loop where the detected color temperature difference is used to adjust the flash lamp's light compensation parameters. This feedback mechanism enables the system to maintain accurate color temperature control within a limited range by continuously correcting deviations, rather than requiring the flash lamp to directly manage the entire color temperature spectrum.
3Adaptability or versatility
If multiple flash lamps with different color temperatures are used, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent makes the single flash lamp universal by enabling it to adapt to different color temperature requirements through real-time parameter adjustment based on detected color temperature differences. Instead of requiring multiple specialized flash lamps for different color temperatures, one flash lamp can perform multiple color temperature functions dynamically, reducing device complexity while maintaining versatility.
Data Source
Figure 1~2
Figure 3~4
AI summary
The present disclosure relates to a method and a device for correcting color temperature of a flash lamp, belonging to a computer technology field. The method includes: obtaining (101) a first color temperature value of a gray point region in a first image; searching (102) for an image region corresponding to the gray point region in a second image; obtaining (103) a second color temperature value of the image region; and correcting (104, 206) the color temperature for light compensation of the flash lamp according to a difference obtained by subtracting the first color temperature value from the second color temperature value. With the present disclosure, the color temperature for light compensation of the flash lamp is consistent with the environment light, improving image quality. Moreover, a problem of increasing cost when the correction error is reduced by reducing the bin region is avoided, thus reducing the cost for correcting the color temperature.