Area-Dependent Exposure Control for Camera Shake Blur Reduction
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Solution Overview
Problem
Conventional imaging apparatuses fail to uniformly control exposure time across an image frame, leading to potential blur in areas with significant camera shake, especially in scenes with wide dynamic range, as they do not account for camera shake when adjusting exposure times.
Innovation Solution
An imaging apparatus that divides the image sensor into areas and calculates camera shake for each area, allowing for independent control of exposure time and pixel summing methods based on detected camera shake, using angular velocity and acceleration data or pixel variance to determine optimal settings for each area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If exposure time is increased for dark areas to improve brightness, then brightness is improved, but camera shake blur increases
Solution Approach 1:
The image sensor is divided into multiple areas, and exposure time is controlled independently for each area based on its brightness characteristics and camera shake amount. This allows dark areas to receive longer exposure for brightness improvement while bright areas use shorter exposure to avoid saturation and blur.
Solution Approach 2:
Different exposure times are applied to different areas of the image sensor based on local brightness requirements. Dark areas receive longer exposure times to improve brightness, while bright areas receive shorter exposure times to prevent saturation, achieving local optimization of image quality.
2Reliability
If pixel summing is applied to reduce camera shake blur, then image stability is improved, but resolution decreases
Solution Approach 1:
The image sensor is divided into multiple areas, and pixel summing is applied selectively to areas with significant camera shake while leaving areas with minimal shake at full resolution. This segmentation allows stability improvement where needed without sacrificing resolution where possible.
Solution Approach 2:
Pixel summing operation is applied locally to specific areas based on detected camera shake amounts. Areas with high shake undergo pixel summing to reduce blur, while areas with low shake maintain original pixel resolution, achieving local optimization of both stability and resolution.
3Ease of operation
If uniform exposure control is applied to the entire frame, then control simplicity is maintained, but image quality in varying shake areas deteriorates
Solution Approach 1:
The image sensor is divided into multiple areas for independent exposure control. Although this increases control complexity, it enables precise adaptation to different camera shake conditions in different areas, significantly improving overall image quality compared to uniform control.
Solution Approach 2:
Exposure time and pixel summing parameters are dynamically adjusted for each area based on real-time camera shake detection. This dynamic control adapts to varying shake conditions across the frame, improving image quality while maintaining reasonable operational complexity through automated detection and adjustment.
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
This approach enables precise exposure control and pixel readout for each area, reducing blur and ensuring high-resolution images by adapting to varying camera shake levels across the frame, thereby improving image quality and reducing noise.
Implementation Method 1
an image sensor unit for generating pixel data of a pixel constituting a frame by photoelectric conversion
Data Source
AI summary
The present disclosure relates to an imaging apparatus, an imaging method and a program, and a reproduction apparatus according to which an image sensor is divided into a plurality of areas and exposure control may be performed for each area according to the amount of camera shake. An imaging apparatus which is an aspect of the present disclosure includes an image sensor unit for generating pixel data of a pixel constituting a frame by photoelectric conversion, a calculation unit for calculating an amount of camera shake in each of areas obtained by dividing the frame, and a control unit for controlling exposure time of the image sensor for each of the areas according to the amount of camera shake calculated for each of the areas. The present disclosure is applicable to an electronic device such as a camera including an area ADC type image sensor, for example.