Imaging Element Adaptive Reading Method for Power and Motion Trade-off
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Solution Overview
Problem
Existing imaging technologies face challenges in reducing power consumption while maintaining high accuracy in subject motion detection and image quality, particularly when switching between different frame rates and reading methods.
Innovation Solution
The implementation of an imaging element with a reading portion that switches between a first and second reading method based on subject motion detection, using a storage portion to store captured image data from a photoelectric conversion element, and outputting image data at a variable frame rate, with the second reading method involving thinned image frames to reduce data and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the frame rate of reading out image data is reduced to lower power consumption, then power consumption is reduced, but motion detection accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by making the reading method switchable between full-resolution and thinned modes based on detected motion levels. The system dynamically adjusts the reading strategy: when motion is detected, it uses thinned reading to save power; when no motion is detected, it switches to full-resolution reading to maintain detection accuracy. This dynamic adaptation resolves the contradiction between power consumption and motion detection accuracy.
Solution Approach 2:
The patent changes the reading parameter (resolution/thinning ratio) based on motion detection results. By adjusting the reading method parameter between full-resolution and thinned modes, the system optimizes power consumption while maintaining sufficient motion detection capability. This parameter change allows the system to operate efficiently without permanently sacrificing detection accuracy.
2Use of energy by moving object
If thinned image frames are used to reduce data amount and power consumption, then power consumption and data transmission are reduced, but image quality deteriorates
Solution Approach 1:
The system dynamically switches between thinned and full-resolution reading modes based on motion detection. When motion is present, thinned reading suffices for detection purposes; when no motion is detected, full-resolution reading ensures high image quality for output. This dynamic approach allows the system to use lower quality data only when necessary for motion detection, maintaining high quality when needed.
Solution Approach 2:
The patent applies partial action by using thinned reading (partial data acquisition) for motion detection purposes, which only requires sufficient quality for detection rather than full image quality. When full image quality is needed for output, the system switches to complete reading. This partial action approach reduces power consumption while maintaining adequate quality for the specific purpose of motion detection.
3Measurement precision
If the reading portion reads out all captured image data at high frame rate, then motion detection accuracy is improved, but power consumption increases
Solution Approach 1:
The system uses dynamic switching between full-resolution and thinned reading modes based on motion detection results. When motion is detected in thinned data, the system switches to full-resolution reading to ensure accurate motion analysis. When no motion is detected, it maintains thinned reading to save power. This dynamic adaptation allows the system to use high-data-mode only when necessary for accurate motion detection.
Solution Approach 2:
The patent implements feedback by using motion detection results from thinned reading to control the switching to full-resolution reading. The system continuously monitors motion in thinned data and uses this feedback to determine when full-resolution reading is necessary. This feedback mechanism ensures full-resolution reading is performed only when motion detection accuracy requires it, optimizing power consumption.
4Use of energy by moving object
If frame rate is reduced to save power, then power consumption is reduced, but processing time increases
Solution Approach 1:
The system dynamically adjusts the reading frame rate and method based on motion detection needs. By switching between thinned and full-resolution modes, the system maintains adequate processing throughput while reducing power consumption during static scenes. The dynamic adjustment ensures that processing time is only increased when necessary for power savings, rather than continuously.
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 reduces power consumption and stabilizes processing time while enabling high accuracy subject motion detection and improved image quality by adaptively switching between reading methods and frame rates.
Implementation Method 1
a reading portion that reads out, from a photoelectric conversion element, captured image data obtained by imaging a subject by the photoelectric conversion element
Data Source
AI summary
An imaging element includes a reading circuit, a memory that is capable of storing read captured image data, and an output circuit that outputs output image data based on the captured image data to an outside, in which the reading circuit reads out the captured image data using a first reading method or a second reading method having a smaller read data amount than the first reading method, in a case of the first reading method, a first frame rate corresponds to a second frame rate, in a case of the second reading method, the first frame rate is a frame rate lower than in the case of the first reading method, and the first and second reading methods are switched in accordance with a motion of a subject.