Dynamic Capture Guide for Glare Reduction in Document Imaging
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Solution Overview
Problem
Digital image capture devices face challenges in reducing or eliminating glare and shadows from images of identification documents, which hinders authentication processes and increases the risk of identity theft due to the obscuration of document features.
Innovation Solution
The implementation of a system that modifies the graphical capture guide in a digital image preview window to guide users in adjusting the document's position and orientation to minimize glare and shadows, using techniques such as translating, skewing, or rotating the guide to align the document correctly, thereby reducing lighting artifacts and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a standard graphical capture guide is used in the image preview window, then the user interface is simple and easy to understand, but lighting artifacts such as glare and shadows cannot be reduced
Solution Approach 1:
The graphical capture guide is made dynamic by automatically modifying its characteristics (position, size, shape, orientation) in real-time based on detected lighting artifacts. The system continuously analyzes the preview image and adjusts the guide to prompt users to reposition the document, transforming a static interface element into an adaptive tool that responds to changing lighting conditions.
Solution Approach 2:
The system implements a feedback loop where the preview image is analyzed for lighting artifacts, and the graphical capture guide is modified accordingly to provide visual feedback to the user. This closed-loop control enables the system to guide users in adjusting document position to eliminate glare and shadows, with the guide's modification serving as the feedback mechanism.
2Manufacturing precision
If the graphical capture guide is modified to reduce lighting artifacts, then image quality improves, but the user interface complexity increases
Solution Approach 1:
The system performs self-service by automatically detecting lighting artifacts and autonomously modifying the graphical capture guide without requiring user intervention. The analysis of the preview image and the subsequent adjustment of the guide are automated processes that reduce the cognitive load on the user while maintaining interface simplicity.
Solution Approach 2:
The graphical capture guide serves as an intermediary between the system's lighting artifact detection capabilities and the user's document positioning actions. By modifying the guide's characteristics, the system translates complex image analysis results into simple visual cues that guide users to adjust the document position, bridging the gap between technical detection and user action.
3Object-affected harmful factors
If multiple modifications to the graphical capture guide are implemented, then glare and shadows are more effectively reduced, but the system complexity increases
Solution Approach 1:
The modification of the graphical capture guide is segmented into distinct characteristics (position, size, shape, orientation) that can be independently adjusted based on the type and location of detected lighting artifacts. This segmentation allows the system to apply targeted modifications rather than comprehensive changes, reducing overall system complexity while maintaining effectiveness.
Solution Approach 2:
The system employs a composite approach by combining multiple modification techniques (translation, scaling, rotation, skewing) into a unified graphical capture guide modification system. Rather than implementing separate systems for each modification type, the patent integrates these techniques into a single cohesive framework that adapts the guide based on real-time lighting conditions.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for obtaining, in real-time from an image capture device, a video stream comprising images of a document by a computing device. The computing device provides, for display in an image preview window, the video stream overlaid with a graphical capture guide. In response to detecting a lighting artifact in at least one image of the video stream, the computing device modifies the graphical capture guide within the image preview window. The computing device captures one or more of the images of the document from the video stream.