Zebra Pattern Positioning in Electronic Apparatus Displays
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Solution Overview
Problem
In electronic devices like digital cameras, displaying a zebra pattern for brightness adjustment during image capturing is inaccurate when outputting full-range signals to displays that only support video range, leading to the zebra being displayed at an unintended position.
Innovation Solution
An electronic apparatus with an operation member to specify a brightness range percentage, a combining unit to generate an image with a pattern corresponding to the specified range, and an output unit to display this image, ensuring the zebra pattern is shown at the intended position even when signals are converted from full range to video range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If zebra pattern is displayed using fixed brightness signal values for full-range signals, then the zebra pattern is displayed correctly on full-range displays, but the zebra pattern is displayed at incorrect position on video-range displays
Solution Approach 1:
The patent applies dynamics by making the zebra pattern display range adjustable and adaptable. Instead of using fixed brightness signal values, the system allows dynamic specification of the brightness range through percentage values (first and second set values), enabling the zebra pattern to be correctly displayed on both full-range and video-range displays by adapting to different display capabilities
Solution Approach 2:
The patent changes the parameter representation from fixed brightness signal values to percentage-based range specification. By defining the zebra display range as a percentage of the overall brightness range (using first and second set values), the system can accurately map the zebra pattern to the appropriate brightness levels regardless of whether the display supports full-range or video-range signals
2Ease of operation
If brightness range is specified using fixed signal values, then the specification is simple, but the specification becomes inaccurate when signal conversion occurs
Solution Approach 1:
The patent transforms the brightness range specification from fixed signal values to percentage-based parameters. This allows users to specify the brightness range in a simple and intuitive manner (using percentages of the overall range) while ensuring accurate mapping to the actual brightness levels, regardless of signal conversion between full-range and video-range displays
Data Source
AI summary
An electronic apparatus includes an operation member configured to receive user operation to specify at least a part of a brightness range of a first image using a percentage; a combining unit configured to generate a second image by combining a pattern image with a region of the first image, the region corresponding to the part of the brightness range specified by the user operation; and an output unit configured to output the second image to a display unit.