Head-Mounted OCR Feedback for Target Depth Positioning
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Solution Overview
Problem
Cameras in electronic devices, such as head-mounted devices, have a limited focus range, leading to blurry images and reduced accuracy in optical character recognition when objects are outside this range, making it difficult for users to recognize objects within the target depth range.
Innovation Solution
The electronic device provides feedback to the user when an object is outside the target depth range through visual and audio cues, adjusting the appearance of a visual indicator aligned with the object, displaying text instructions, or presenting a virtual object within the target depth range to guide the user in positioning the object correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera focuses on objects within a limited depth range, then image clarity is improved for objects in that range, but objects outside the range become blurry and unrecognizable
Solution Approach 1:
The system provides real-time feedback to the user through visual indicators and audio cues about the depth position of objects relative to the camera's target depth range. This feedback loop enables users to adjust object positioning dynamically, ensuring objects fall within the optimal focus range for clear imaging and accurate OCR recognition.
Solution Approach 2:
The patent introduces an intermediary feedback mechanism between the camera system and the user. This intermediary layer processes depth information and translates it into user-comprehensible visual and audio signals, mediating the interaction between the user and the camera's depth-of-field constraints.
2Ease of operation
If visual feedback is provided to guide object positioning, then user awareness of depth positioning is improved, but device complexity increases due to additional sensors and processing
Solution Approach 1:
The system leverages the existing camera and display components of the head-mounted device to provide feedback functionality. The camera serves both as the primary imaging sensor and as a depth-sensing mechanism, while the display serves both as the output interface and as the medium for presenting feedback information, eliminating the need for entirely separate feedback hardware.
Solution Approach 2:
The system uses the device's own existing resources (camera, display, processor) to generate and present feedback information. Rather than requiring external or dedicated feedback components, the device self-serves by repurposing its core components for the dual function of capturing images and providing depth-positioning feedback.
Data Source
AI summary
A head-mounted device may include a camera with a target depth range. The camera may capture images of physical objects that include text for optical character recognition (OCR). In one arrangement, no images from the camera are presented to the user during OCR. Accordingly, it may not be apparent to the user when the images captured by the camera are blurry, when the physical object is outside the target depth range, or when OCR is not able to be performed with a high accuracy. To allow the user to easily determine when the physical object is outside the target depth range, the head-mounted device may provide audio and/or visual feedback. Presenting visual feedback may include displaying text instructions, adjusting an appearance of a visual indicator that is aligned with the physical object, or displaying a virtual object at a depth that is within the target depth range.