Dynamic Tone Mapping Preview for Electronic Cameras
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Solution Overview
Problem
Electronic devices face challenges in providing a real-time preview image with dynamic tone mapping applied during moving-image capture, leading to a difference in quality between stored and preview images, which inconveniences users.
Innovation Solution
An electronic device with a camera module, display, and processor that acquires original image frames, displays first preview frames, receives an input for dynamic-tone-mapping-based recording, and generates second preview frames by applying dynamic-tone-mapping processing to the first preview frames after the input is received, ensuring real-time display of the processed frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dynamic-tone-mapping processing is applied to generate preview image frames in real time, then the quality and accuracy of the preview image is improved, but the processing time and computational complexity increase
Solution Approach 1:
The system performs preliminary analysis of the original image frame to generate tone-mapping information before the preview is displayed. This allows the tone-mapping parameters to be pre-calculated based on the input image characteristics, enabling real-time preview generation without compromising image quality
Solution Approach 2:
The processing is divided into two stages: first, analyze the original image frame to generate tone-mapping information; second, apply the pre-generated tone-mapping information to create the preview image frame. This segmentation allows complex processing to be distributed over time, improving both quality and efficiency
2Manufacturing precision
If dynamic-tone-mapping processing is applied to each frame, then the realism and quality of the stored moving image is improved, but the difference between preview and stored image quality increases
Solution Approach 1:
The system uses the same tone-mapping information generated from the original image frame for both the preview display and the final stored moving image. This feedback mechanism ensures that the preview accurately represents the quality and characteristics of the stored image, eliminating the quality discrepancy between preview and final output
Solution Approach 2:
The tone-mapping information serves dual purposes: it is used to generate the preview image frame displayed in real time and also applied to the original image frame for storing the moving image. This multi-functionality ensures consistency between preview and stored quality while maintaining processing efficiency
Data Source
AI summary
A method for providing a preview and an electronic device for displaying a preview are provided. The electronic device includes a camera module, a display, a processor operatively connected to the camera module and the display, and a memory operatively connected to the processor, wherein the memory stores instructions which, when executed, cause the processor to acquire original image frames through the camera module, display, on the display, first preview image frames corresponding to the acquired original image frames, receive an input for requesting dynamic-tone-mapping-based recording, perform the dynamic-tone-mapping-based recording in response to the reception of the input, and while performing the dynamic-tone-mapping-based recording, generate second preview image frames by performing dynamic-tone-mapping processing to first preview image frames acquired after a time point at which the input is received, and display the generated second preview image frames on the display. Various other embodiments are possible.