Viewfinder Focus Quality Indicator Using Color Mapping
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Solution Overview
Problem
In digital camera systems, especially those with small viewfinders like mobile phones, users face difficulties in determining the focus quality of objects or regions within an image due to limited display size and high processing demands, leading to inadequate information on focus levels before capture.
Innovation Solution
The system analyzes image portions and uses different colors to indicate focus quality, providing a comprehensive and easy-to-read indicator on the viewfinder, allowing users to assess focus levels for each part of the image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a small viewfinder is used in mobile devices, then the device portability is improved, but the user's ability to see fine details and determine focus quality deteriorates
Solution Approach 1:
The patent applies color changes to indicate focus quality levels. Different colors (e.g., red, yellow, green) are assigned to different focus quality ranges, allowing users to quickly assess focus status at a glance. This visual encoding transforms quantitative focus measurements into intuitive color indicators that are easily distinguishable on small viewfinder displays.
Solution Approach 2:
The patent adds a color dimension to the traditional grayscale or single-color viewfinder display. By mapping focus quality to the color dimension (hue, saturation, or brightness), the system encodes additional information without requiring increased display physical size, thus maintaining portability while improving information density.
2Device complexity
If conventional focus indicators (rectangles) are used, then the system complexity is reduced, but the information provided to users about focus quality is insufficient
Solution Approach 1:
The patent changes the parameter used for focus indication from simple geometric shapes to color parameters. By varying color attributes (hue, saturation, brightness) based on focus quality measurements, the system conveys nuanced focus information that goes beyond simple in-focus/out-of-focus binary states, providing richer information without proportionally increasing system complexity.
Solution Approach 2:
The patent introduces color as an intermediary between the focus measurement system and the user. Instead of directly displaying complex focus metrics or requiring users to interpret subtle image sharpness changes, the color intermediary translates focus quality into an intuitive visual language that is easily understood, effectively bridging the gap between technical measurements and user comprehension.
3Productivity
If real-time image processing is performed on mobile devices, then the processing capability is improved, but the display performance and focus determination accuracy are affected
Solution Approach 1:
The patent segments the image into multiple regions and processes each region independently for focus quality assessment. This segmentation approach allows the system to concentrate processing resources on extracting key focus features from each region rather than attempting to analyze the entire image uniformly, improving both processing efficiency and focus measurement accuracy by focusing computational effort where it is most needed.
Data Source
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AI summary
An improved system and method for providing information concerning the level of focus of objects appearing on a viewfinder for a digital camera system. The present invention analyzes a plurality of objects or regions of an image that is being shown to a user through a viewfinder of an electronic device. The system creates an overview map that matches the objects within the image, and colors are applied to objects within the overview map, representing the focus quality levels of the respective objects. The overview map is superimposed over the image, providing the user with information concerning the relative focus quality of the respective objects.