Rapid Camera Exposure Using Cached Pre-Alarm Brightness
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Solution Overview
Problem
Low-power fast-start cameras face challenges in reducing power consumption, primarily through optimizing initial image effects, leading to inefficient power usage.
Innovation Solution
Adjust image acquisition frequency and resolution based on object distance and volume during the sleep state, cache pre-alarm images, determine brightness and exposure factors from cached images, and control exposure based on these factors after startup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image acquisition frequency and resolution are maintained at high levels during sleep state, then image quality is preserved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts image acquisition parameters (frequency and resolution) based on detected object characteristics such as distance and volume. The system transitions from static high-quality acquisition to adaptive acquisition, reducing power consumption while maintaining image quality when needed.
Solution Approach 2:
The system changes acquisition parameters (frequency and resolution) based on object characteristics. By adjusting these parameters dynamically rather than maintaining fixed high settings, the system reduces power consumption while preserving image quality for relevant targets.
2Measurement precision
If exposure time is extended to improve image brightness, then image quality improves, but power consumption increases
Solution Approach 1:
The system performs preliminary analysis of cached images during the sleep state to determine optimal exposure parameters before actual image capture. By pre-determining brightness and exposure factors from cached pre-alarm images, the system avoids extended exposure times during active capture, reducing power consumption while ensuring adequate image brightness.
Solution Approach 2:
The system uses its own cached images to determine exposure parameters, making the exposure optimization self-determined rather than requiring extended exposure or external calibration. This self-service approach reduces power consumption by using existing cached data for parameter determination.
3Use of energy by moving object
If image acquisition parameters are optimized for power saving, then power consumption reduces, but initial image effect deteriorates
Solution Approach 1:
The system uses feedback from cached pre-alarm images to determine optimal exposure parameters. By analyzing the brightness characteristics of cached images and using this feedback to set exposure factors, the system ensures that initial image quality is maintained while power consumption is reduced through optimized acquisition parameters.
4Use of energy by moving object
If camera remains in sleep state to save power, then power consumption reduces, but response time increases
Solution Approach 1:
The system performs preliminary image caching and parameter determination during the sleep state. By caching pre-alarm images and determining exposure parameters in advance, the system minimizes the processing time required after waking from sleep, thus reducing the overall response time while maintaining power-saving benefits.
Data Source
AI summary
The present disclosure relates to the technical field of cameras, and provides a camera rapid exposure method and apparatus, an electronic device, and a medium. The method comprises: when a camera is in a dormant state, adjusting an image acquisition frequency and an image acquisition resolution on the basis of currently measured object distance and object body volume; controlling a sensing unit in the camera, and acquiring and caching a pre-alarm image by using the adjusted image acquisition frequency and image acquisition resolution; on the basis of the brightness of a plurality frames of the pre-alarm image cached by the camera when in the dormant state, estimating the brightness and exposure factor of a first frame image after the camera has started up; and once the camera is controlled to start up, performing exposure according to the estimated brightness and exposure factor of the first frame image after the camera has started up.