Client Apparatus Exposure Correction for Monitoring Camera
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Solution Overview
Problem
Existing image capturing systems face challenges in performing appropriate exposure control when the evaluation regions for exposure determination differ between the monitoring camera and the client apparatus, leading to potential overcorrection and loss of highlight detail.
Innovation Solution
The system includes a client apparatus with a first acquisition unit to acquire images, a second acquisition unit for exposure information, a determination unit to calculate exposure correction based on luminance differences, and an output unit to transmit correction information to the monitoring camera, enabling exposure control through a combination of coarse and fine adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If exposure control is performed based on luminance difference between first and second regions, then exposure accuracy is improved, but device complexity increases due to multiple acquisition units and determination units
Solution Approach 1:
The patent divides the image into multiple evaluation regions (first region for initial exposure determination and second region for correction determination). This segmentation allows different parts of the image to be used for different exposure control purposes, improving accuracy while managing complexity through functional division
Solution Approach 2:
The patent introduces correction information as an intermediary element that bridges the difference between exposure determination at the monitoring camera and exposure determination at the client apparatus. This intermediary enables accurate exposure control without requiring complete system redesign
2Measurement precision
If exposure correction is applied to match evaluation regions, then exposure accuracy is improved, but loss of highlight detail occurs due to overcorrection
Solution Approach 1:
The patent applies partial correction by using only the luminance difference from the second region (rather than full correction based on first region), avoiding overcorrection that would cause highlight loss while still achieving sufficient exposure accuracy
Solution Approach 2:
The system uses feedback from luminance measurements in both regions to adjust exposure correction dynamically, allowing the system to achieve accurate exposure while preventing overcorrection through continuous monitoring and adjustment
Data Source
AI summary
An apparatus capable of communicating with a capturing apparatus includes a first acquisition unit configured to acquire an image captured by the capturing apparatus, a second acquisition unit configured to acquire first exposure information determined by the capturing apparatus based on a luminance of a first region in the image, a first determination unit configured to determine second exposure information based on a luminance of a second region, a second determination unit configured to determine correction information based on a difference between the first exposure information and the second exposure information, and an output unit configured to output the correction information to the capturing apparatus.