Smart Zoom Centering on Selected Object in Mobile Terminal
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Solution Overview
Problem
Conventional mobile terminals struggle to provide a zoom function that centers on a selected subject, leading to difficulties in capturing desired images due to limitations in zooming capabilities, which only allow centering on the preview image's center and lack optimal magnification for the subject.
Innovation Solution
A terminal with a display unit and a controller that captures images, displays a preview, allows user input for selecting objects, determines smart zoom magnification for optimal display, and processes the zoom to center on the selected object, enabling variable speed zoom adjustments and optimal magnification for capturing images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If digital zoom is used to enlarge a portion of shot image data, then zoom function is provided without complicated lens mechanism, but the zoom can only center on the center of preview image making it difficult to capture desired subject
Solution Approach 1:
The preview image is divided into multiple regions including a center region and peripheral regions. The system selectively applies different zoom operations to different regions based on user input, allowing the zoom center to be positioned anywhere in the image rather than being fixed at the center. This segmentation enables flexible subject-centered zooming while maintaining digital zoom simplicity.
Solution Approach 2:
A region determination unit acts as an intermediary between the user input and the image processing system. This intermediary identifies the desired subject region in the preview image and translates user intent into appropriate zoom parameters, enabling the zoom function to center on any selected subject rather than being constrained to the image center.
2Manufacturing precision
If optical zoom with focal distance variation is used, then zoom quality is improved, but complicated lens mechanism is required
Solution Approach 1:
The patent replaces the mechanical lens movement system with digital image processing. By selecting and enlarging specific regions from the captured image data through digital zoom, the system achieves zoom functionality without requiring complex mechanical lens mechanisms, thereby reducing device complexity while maintaining acceptable zoom quality.
Solution Approach 2:
The system captures the complete scene at full resolution before performing zoom operations. By having the entire high-quality image data available in advance, the system can digitally enlarge any region without loss of quality, eliminating the need for mechanical lens adjustments during the zoom process.
3Ease of manufacture
If zoom is centered on preview image center only, then the zoom function is simple to implement, but user has difficulty capturing desired image
Solution Approach 1:
The zoom center position is made dynamic rather than fixed. The system allows the zoom center to move to any location in the preview image based on user selection, transforming the static center-point zoom into a dynamic subject-following zoom that adapts to the user's desired subject while remaining simple to implement through software control.
Data Source
AI summary
Disclosed are a terminal and controlling method thereof. The present invention includes displaying a preview image captured through a camera, obtaining an input for selecting an object from the displayed preview image, determining a smart zoom magnification for the selected object to be displayed in an optimal size, zoom-processing the preview image at the determined smart zoom magnification centering on the selected object, and displaying the zoom-processed preview image.