Imaging Apparatus Noise Reduction via Dual Exposure Control
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Solution Overview
Problem
Imaging apparatuses face challenges in obtaining favorable composite images due to increased noise in high-sensitivity shooting operations, especially when photographing nightscape scenes, as existing techniques fail to appropriately set exposure conditions for flash emission and non-flash emission shooting operations.
Innovation Solution
An imaging apparatus that captures images using both light emission and non-light emission shooting operations, determining exposure control values based on object brightness through a preliminary light emission, and combines image data to reduce noise and camera shake effects, prioritizing light emission data for person areas and non-light emission composite data for background areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high sensitivity shooting operation is performed to suppress camera shakes, then camera shake suppression is improved, but noise in the image data increases
Solution Approach 1:
The imaging process is segmented into multiple shooting operations with different sensitivity settings. High sensitivity shooting is performed to capture shake-free images, while low sensitivity shooting is performed to capture low-noise images. The segmentation allows each operation to optimize for its specific purpose, and the results are combined through image composition to achieve both shake suppression and noise reduction.
Solution Approach 2:
Multiple image data sets from different shooting operations are merged through image composition. The high sensitivity image data (shake-free) and low sensitivity image data (low noise) are combined using pixel-by-pixel combining ratios, allowing the final composite image to benefit from both shake suppression and noise reduction simultaneously.
2Manufacturing precision
If exposure conditions are not appropriately set for flash emission and non-flash emission shooting, then image combining processing cannot be optimized, but the system remains simple
Solution Approach 1:
Exposure conditions for both flash emission and non-flash emission shooting operations are determined in advance based on preliminary light emission measurement. The control unit measures the reflected light amount from a preliminary light emission and uses this information to pre-determine appropriate exposure conditions before the actual shooting operations, ensuring optimal image combining quality without requiring complex real-time adjustments.
Solution Approach 2:
The system uses feedback from preliminary light emission measurement to adjust and determine exposure conditions. The control unit measures the reflected light amount and uses this feedback information to optimize the exposure settings for subsequent shooting operations, creating a closed-loop control system that improves image combining quality adaptively.
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
The solution effectively reduces noise and camera shake effects, enabling the creation of composite images with a bright background and person without significant noise or shake issues, by accurately determining exposure control values and combining image data from multiple shooting operations.
Implementation Method 1
a light emission shooting operation performed while causing a light emitting device to emit light
Data Source
AI summary
A determination unit determines exposure control values for a light emission shooting operation and a non-light emission shooting operation based on information acquired by an acquisition unit about a brightness of an object a preliminary light emission is performed by the light emitting device.