Real-Time HDR Image Preview and Exposure Adjustment
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Solution Overview
Problem
Electronic devices do not provide a preview for high dynamic range (HDR) images captured through cameras, making it difficult for users to adjust exposure settings in real-time and ensuring the captured HDR images meet their needs.
Innovation Solution
An electronic device with a camera, display, and processor that obtains multiple images with varying exposure values, displays a preview of both the original and HDR images, and allows users to adjust exposure settings in real-time through a user interface, enabling the capture of HDR images based on desired exposure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If HDR image capture is implemented using multiple images with different exposure values, then image quality and dynamic range are improved, but the complexity of the capture process and real-time preview capability deteriorate
Solution Approach 1:
The system performs preliminary actions by capturing multiple images with different exposure values before final HDR image generation. The processor captures a first image at a first exposure value and a second image at a second exposure value, then synthesizes these pre-captured images into an HDR image. This allows the complex HDR capture process to be broken down into manageable preliminary steps that can be performed in advance.
Solution Approach 2:
The HDR capture process is segmented into distinct components: capturing a first image at a first exposure value, capturing a second image at a second exposure value, and then synthesizing these separate images into a final HDR image. This segmentation allows each component to be optimized independently and simplifies the overall process by dividing the complex task into smaller, manageable segments.
2Ease of operation
If real-time preview of HDR images is provided, then user satisfaction and ease of operation are improved, but processing time and computational resources are increased
Solution Approach 1:
The system performs preliminary actions by pre-capturing multiple images with different exposure values before the user needs to view or edit them. The processor captures the first and second images at different exposure values in advance, then synthesizes them into an HDR image that can be displayed as a preview. This allows real-time preview capability without requiring complex real-time processing during the actual capture moment.
Solution Approach 2:
The system creates a copy of the HDR image as a preview that can be displayed without requiring the full complex processing to be performed in real-time. The preview is generated from the pre-captured images and their synthesized HDR version, allowing users to view and adjust exposure settings without immediate computational overhead.
3Manufacturing precision
If multiple images with different exposure values are captured and synthesized, then dynamic range is improved, but the number of images to process and storage requirements increase
Solution Approach 1:
The image capture process is segmented into capturing a first image at a first exposure value and a second image at a second exposure value. By segmenting the capture process into these two distinct images with different exposure values, the system achieves improved dynamic range while limiting the quantity of images to process to just these two segments rather than requiring multiple additional images.
Solution Approach 2:
The system changes the exposure value parameter between the first and second images to create the necessary dynamic range. The first image is captured at a first exposure value and the second image is captured at a second exposure value, creating the parameter variation needed for HDR synthesis. This parameter change approach allows dynamic range improvement without requiring an excessive number of images.
Data Source
AI summary
Disclosed is an electronic device including a camera apparatus, a display, at least one processor, and memory storing instructions, that, when executed by the at least one processor, cause the electronic device to obtain, through the camera apparatus, a first image and at least one image in which a parameter for a high dynamic range (HDR) is changed with respect to the first image, obtain a first HDR image using the first image and the at least one image, display, on the display, a first preview image corresponding to the first image and a second preview image corresponding to the first HDR image, display a user interface for changing the parameter for the first HDR image, and in response to a user input to the user interface, display the second preview image in which the first HDR image is changed to a second HDR image based on the changed parameter.