Optical Sensor Correction for Recording Medium Type Determination
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Solution Overview
Problem
Conventional techniques for determining the type of a recording medium suffer from inaccuracies due to measurement errors and variations in measurement environments, leading to insufficient determination accuracy.
Innovation Solution
An information processing apparatus that measures diffused reflection and specular reflection characteristic values using an optical sensor, with a correction expression calculated to adjust for measurement discrepancies, allowing for accurate determination of the recording medium type by comparing these values against a common extraction range stored in an EEPROM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement techniques are used to determine recording medium type, then the determination process is simple, but the determination accuracy is insufficient due to measurement errors and environmental variations
Solution Approach 1:
The patent transforms the measurement parameters from raw reflection values to corrected values by applying correction expressions that account for individual apparatus characteristics. This parameter transformation compensates for measurement errors and environmental variations, thereby improving determination accuracy without requiring a complete redesign of the measurement system.
Solution Approach 2:
The system implements a feedback mechanism where correction expressions are calculated based on measured values from multiple recording media types, and these correction expressions are then applied to subsequent measurements. This closed-loop approach continuously improves measurement accuracy by compensating for apparatus-specific variations.
2Measurement precision
If multiple characteristic values are measured to improve determination accuracy, then the precision increases, but the measurement time and processing complexity increase
Solution Approach 1:
The patent performs preliminary measurements on multiple recording media types to calculate correction expressions before actual determination operations. These pre-calculated correction expressions are then applied to subsequent measurements, allowing for accurate determination without repeatedly performing time-consuming multi-parameter measurements for each new medium.
Solution Approach 2:
By transforming raw measurement parameters into corrected parameters using pre-calibrated correction expressions, the system achieves high determination accuracy with fewer actual measurements required, thereby reducing measurement time while maintaining precision.
3Ease of operation
If reference values are used for determination, then the process is straightforward, but individual differences in sensor placement and apparatuses lead to inaccurate determinations
Solution Approach 1:
The patent introduces apparatus-specific correction expressions that are tailored to each individual device's characteristics, including sensor placement variations. This localized correction approach maintains operational simplicity while compensating for individual differences, thereby improving determination accuracy without complicating the overall process.
Solution Approach 2:
Correction expressions serve as an intermediary between raw measurement values and final determination results. These intermediary correction factors account for apparatus-specific variations, allowing the system to maintain straightforward operation while achieving accurate determinations across different devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of recording medium type determination by correcting for measurement variations, ensuring accurate classification regardless of individual differences in sensor placement or apparatuses, thereby improving overall determination precision.
Implementation Method 1
measures diffused reflection and specular reflection characteristic values using an optical sensor
Implementation Method 2
measures diffused reflection and specular reflection characteristic values using an optical sensor
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
An information processing apparatus performs acquiring measurement results obtained by measuring a characteristic of a recording medium a plurality of times; inputting information corresponding to a type of the recording medium; acquiring an extraction range of the type indicated by the information, among extraction ranges set to respective types of recording media for determination of a type; setting, based on the measurement results and the type, a parameter for correcting the measurement results to reduce difference between the measurement results and the extraction range; correcting, by using the parameter, measurement results obtained by measuring a characteristic of a recording medium to be recorded; and extracting a candidate type of the recording media, the measurement results, based on the corrected measurement results and the extraction range.