Scanner Calibration Deck for Imaging Accuracy
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Solution Overview
Problem
Imaging equipment, such as scanners, experience inaccuracies in data collection due to camera profiling and bulb replacement, leading to a need for improved calibration methods to ensure precision and accuracy in batch-document scanning processes.
Innovation Solution
A calibration deck comprising sheets with reference marks, black and white filled bubbles, and grayscale bubbles is used to calibrate scanners by comparing scan results to an industry standard baseline, ensuring consistent image capture quality across all scanners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scanners are used to scan large volumes of documents continuously, then productivity is improved, but measurement precision deteriorates due to camera profiling errors, camera adjustments, and bulb replacement
Solution Approach 1:
The patent implements preliminary calibration actions by scanning a calibration deck before actual document scanning. The calibration deck includes reference marks and grayscale targets that establish baseline parameters for the scanning system. This preliminary calibration compensates for camera profiling errors, camera adjustments, and bulb replacement effects before they affect production scanning, thereby maintaining measurement precision while enabling continuous high-volume scanning.
2Measurement precision
If calibration is performed frequently to maintain accuracy, then measurement precision is improved, but loss of time increases due to calibration interruptions
Solution Approach 1:
The patent implements a streamlined calibration process using a specialized calibration deck that requires only partial scanning operations compared to full document scanning. The calibration deck contains essential reference elements (reference marks, grayscale targets) that can be scanned quickly to establish baseline parameters without requiring complete calibration sequences, thereby reducing calibration time while maintaining sufficient accuracy for continuous scanning operations.
Data Source
AI summary
Disclosed herein, among other things, are method and apparatus for calibrating imaging equipment. According to one embodiment of a method, a calibration deck of timing sheets is prepared. The calibration deck includes a sheet with a series of reference marks that help determine the amount of skew, a sheet with objective scoring bubbles that are all filled in with black ink, a grey scale bubble sheet having a predetermined number of shades between black and white, and a sheet with objective scoring bubbles that are all unfilled, or white. The timing sheets are scanned on a scanner, and results from scanning the calibration deck are compared to an industry standard baseline.