Image Processing Method for Motion Track Capture in Bright Environments
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Solution Overview
Problem
Conventional electronic devices struggle to capture motion tracks of objects in bright environments without reducing aperture value or adjusting photosensitivity, leading to potential overexposure and limitations in depth of field.
Innovation Solution
An image processing method and electronic apparatus that perform photometry to determine a unit shutter speed, allowing for sequential capture and synthesis of images using specified photosensitivity and aperture values, thereby simulating slow shutter speeds without adjusting aperture or photosensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a slow shutter speed is used to capture motion tracks, then the motion track effect is improved, but overexposure occurs in bright environments
Solution Approach 1:
The patent divides the slow shutter speed exposure into multiple short exposure images captured sequentially. Instead of using a single long exposure that causes overexposure, the system captures multiple frames at shorter intervals and synthesizes them to achieve the desired motion track effect while controlling total exposure.
Solution Approach 2:
The patent uses periodic capture of multiple images at regular intervals to simulate slow shutter speed. By capturing images periodically and synthesizing them, the system achieves motion track effects without the continuous overexposure problem of traditional slow shutter speed in bright conditions.
2Illumination intensity
If aperture value is reduced to control exposure, then overexposure is avoided, but depth of field becomes too large
Solution Approach 1:
The patent maintains a fixed aperture value throughout the capture process to preserve shallow depth of field effect. Instead of adjusting aperture to control exposure, the system segments the exposure control into temporal multiple frames, allowing the aperture to remain optimized for depth of field requirements.
3Illumination intensity
If photosensitivity is reduced to control exposure, then overexposure is avoided, but the minimum photosensitivity limit is reached
Solution Approach 1:
The patent avoids adjusting photosensitivity by segmenting the exposure control into multiple frames. The total exposure is controlled by the number and timing of captured frames rather than changing the sensor's photosensitivity, allowing flexible exposure control without hitting minimum ISO limits.
4Illumination intensity
If a gray mirror is used to reduce exposure, then overexposure is avoided, but the device complexity and operation convenience are reduced
Solution Approach 1:
The patent replaces the mechanical gray mirror system with a digital image processing approach. Instead of physically blocking light with adjustable density mirrors, the system captures multiple images and uses computational synthesis to achieve the desired exposure effect, eliminating the need for complex optical components.
Solution Approach 2:
The patent creates multiple copies of the scene at different times and synthesizes them to achieve the desired exposure effect. Rather than using a gray mirror to physically reduce light, the system captures multiple copies and processes them digitally to simulate the desired exposure characteristics.
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
Enables the capture of motion tracks in bright environments without overexposure, maintaining aperture value and photosensitivity settings, while achieving the effect of slow shutter speeds.
Implementation Method 1
performing a photometry to current environment; determining a unit shutter speed according to a result of the photometry
Data Source
AI summary
An image processing method and an electronic apparatus are described. The image processing method is applied to an electronic apparatus and includes performing a photometry to current environment; determining a unit shutter speed according to a result of the photometry, a specified photosensitivity and a specified aperture value; and capturing, when a first operation is detected, a plurality of images sequentially by using the specified photosensitivity, the specified aperture value and the unit shutter speed and synthesizing the plurality of images until a second operation is detected.