Multi-Exposure Image Capture for Single-Take HDR Video
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Solution Overview
Problem
Existing image capturing technologies face limitations in applying multi-frame composition techniques like HDR when capturing photos and videos simultaneously, and existing methods for extracting key frames from videos are resource-intensive and result in quality differences between photo and video captures.
Innovation Solution
An electronic device with a camera and sensor configures multiple exposure values based on the image capturing environment, alternately applies these values to acquire frames, and generates high-quality videos or images using HDR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single take mode is used to capture photos and videos simultaneously, then capturing operation is simplified, but exposure values cannot be adaptively changed and multi-frame composition technique cannot be applied
Solution Approach 1:
The patent applies dynamics by making the exposure value adjustable and variable during the capturing operation. The system dynamically changes exposure values based on the captured image content and user input, allowing adaptive adjustment while maintaining the simplicity of single take mode operation.
Solution Approach 2:
The patent changes the parameter of exposure value from fixed to variable. By allowing the exposure value to be adjusted based on image content analysis and user interaction, the system maintains ease of operation while gaining adaptability for different lighting conditions and composition requirements.
2Adaptability or versatility
If auto exposure bracketing (AEB) camera is used to obtain frames with plurality of different exposure values, then multi-frame composition technique can be applied, but the process is complex and requires multiple capturing operations
Solution Approach 1:
The patent merges the functions of multiple capturing operations into a single take mode operation. By combining photo and video capturing in one operation while dynamically adjusting exposure values, the system achieves multi-frame composition capability without requiring separate capturing steps for different exposure brackets.
Solution Approach 2:
The patent performs preliminary action by analyzing the captured image content before finalizing the exposure values. The system uses image content analysis to determine appropriate exposure adjustments in advance, enabling adaptive exposure control without complex manual intervention or multiple operations.
3Ease of operation
If key-frame extraction method is used to extract important moments from videos, then photo extraction is simplified, but resource consumption is high and quality difference exists between photo and video captures
Solution Approach 1:
The patent applies local quality by focusing the image content analysis on specific regions and features within the captured images. Instead of processing entire video frames uniformly, the system identifies and analyzes local areas of interest to determine exposure adjustments, reducing computational resources while maintaining photo quality.
Solution Approach 2:
The patent replaces the mechanical system of decoding entire video frames with a more efficient approach using image content analysis on captured frames. By substituting the heavy video decoding process with direct analysis of captured image data, the system reduces resource consumption while maintaining the ability to extract high-quality photos.
Data Source
AI summary
According to an embodiment of the present disclosure, disclosed is an electronic device comprising: a camera which can set a plurality of exposure values; a sensor for detecting an image capturing environment of the electronic device; and at least one processor electrically connected to the camera and the sensor, wherein the at least one processor is configured to: obtain information about the image capturing environment through the sensor; set two or more exposure values among the plurality of exposure values on the basis of the obtained information about the image capturing environment; obtain frames to which the two or more set exposure values are alternately applied; and generate a video file on the basis of the obtained frames.