Circuit Apparatus for Display Error Detection via Reference Image Comparison
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Solution Overview
Problem
Existing display control technologies face limitations in error detection for icons or objects displayed on a screen, as they often require a predetermined display area, reducing design flexibility and failing to efficiently detect errors in image data due to communication errors.
Innovation Solution
A circuit apparatus and method that includes an image acquisition circuit, an error detection circuit, and a search circuit, which acquires and processes display images to determine the position and visibility of foreground images relative to background images using histogram analysis and correlation operations, allowing error detection without pre-defined display positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If error detection is performed on a display area specified in advance, then error detection accuracy is improved, but the flexibility of display design decreases
Solution Approach 1:
The patent applies preliminary action by pre-storing reference images in the storage unit that represent correct display states of icons and objects. When error detection is needed, the display controller compares the currently displayed image against these pre-stored reference images to identify errors, eliminating the need to pre-specify display areas while maintaining detection accuracy.
Solution Approach 2:
The patent uses copying by storing reference images (copies of correct display states) in the storage unit. These reference copies are then compared with the actual displayed image to detect errors, allowing flexible error detection without requiring predetermined display areas.
2Reliability
If CRC-based error detection is used on image data, then error detection capability is improved, but it cannot detect errors in displayed icons or objects
Solution Approach 1:
The patent introduces an intermediary approach by using reference images as a mediator between the transmitted image data and the displayed output. The display controller compares the displayed image against the reference image intermediary to detect errors in icons and objects, bridging the gap between data-level CRC detection and visual content verification.
Solution Approach 2:
The patent creates a copy of the expected correct display state (reference image) and compares it with the actual displayed image. This copying mechanism enables detection of errors in icons and objects by comparing the displayed content against its reference copy, going beyond simple CRC checks.
3Adaptability or versatility
If a search circuit is added to find display positions, then adaptability of error detection is improved, but device complexity increases
Solution Approach 1:
The patent achieves universality by designing the display controller to perform multiple functions: it controls display timing, processes image data, stores reference images, and performs error detection by comparing displayed images with references. This multi-functional design eliminates the need for separate dedicated error detection hardware, reducing overall system complexity while maintaining adaptability.
Solution Approach 2:
The patent merges the error detection function with the existing display control circuitry. The display controller integrates reference image storage, comparison logic, and error detection capabilities into a single unit, combining multiple functions that would traditionally require separate circuits, thereby reducing device complexity while enhancing adaptability.
Data Source
AI summary
A circuit apparatus includes an image acquisition circuit, an error detection circuit, and a search circuit. The error detection circuit determines an indicator representing the degree of dissimilarity between a foreground image and a background image out of a display image based on the result of correlation operation and performs error detection on the display image based on the indicator. The search circuit searches the display image for the display position of the foreground image based on the reference image, which serves as a reference for the foreground image. The error detection circuit performs the error detection based on the display position searched for by the search circuit.