Display Afterimage for Front Camera Autofocus in Dark
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Solution Overview
Problem
Capturing images with front cameras in dark environments is challenging due to the lack of lighting, as existing technologies using display lights often result in unnatural and incorrect focusing.
Innovation Solution
An electronic device and method that utilize a display with adjustable lighting parameters to generate an afterimage effect, allowing for optimal camera operation parameters to be determined and adjusted, enabling natural image capture in dark spaces by gradually increasing display brightness and using afterimages to enhance object visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If display brightness is increased to provide lighting for image capture in dark environments, then illumination intensity is improved, but focusing accuracy deteriorates due to unnatural and incorrect focusing caused by display lighting
Solution Approach 1:
The system performs preliminary actions by first capturing a reference image without display lighting, then capturing a second image with display lighting. It calculates the difference between these images to generate an afterimage map before the actual image capture, thereby preparing compensation data in advance to correct focusing accuracy issues
Solution Approach 2:
The system uses feedback by calculating the difference (afterimage) between the reference image and the image captured with display lighting. This afterimage information is fed back to adjust and optimize the image capture parameters, enabling the system to compensate for focusing errors caused by display lighting and achieve accurate focusing in dark environments
2Productivity
If camera operation parameters are adjusted before using display lighting, then image capture setup is completed, but image quality deteriorates due to unnatural focusing caused by inadequate environmental light detection
Solution Approach 1:
The system captures a reference image first, then uses the difference between the reference image and the image captured with display lighting as feedback (afterimage). This feedback is used to adjust camera operation parameters and achieve accurate focusing, thereby improving image quality while maintaining capture efficiency
Solution Approach 2:
The system performs preliminary image capture to obtain a reference image before adjusting camera parameters for display lighting capture. This preliminary action enables the system to calculate the afterimage and determine optimal camera operation parameters, ensuring both efficiency and reliability
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 users to easily compose and adjust images by changing display lighting output, extracting optimal camera operation parameters for improved image capture, resulting in clearer images in dark environments.
Implementation Method 1
controlling the display to operate using a first lighting parameter and a second lighting parameter to generate an afterimage effect for objects included in images
Data Source
AI summary
An electronic device for capturing an image by using a display is provided. The electronic device includes a display, a display controller configured to operate the display using a first lighting parameter and a second lighting parameter to generate an afterimage effect for objects included in images, a camera configured to capture an image to be displayed by the display, and a processor configured to determine a camera operation parameter corresponding to a final lighting parameter of the display for a capture operation of the camera. Therefore the electronic device according to various embodiments of the present disclosure can capture a high quality image in a dark environment.