Dynamic PCS Determination for Paper Documents
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for testing print contrast signal (PCS) compliance in paper documents are inefficient due to subjective selection of background samples, leading to inconsistent results and increased costs, as designs may pass testing but fail when processed by other equipment.
Innovation Solution
A system and method that determine a plurality of PCS values across a document's surface, using an input module for reflectance value acquisition, a memory for storing threshold values, a calculation module for determining PCS values based on target and adjacent region reflectance, and a comparison module to assess compliance with specified thresholds, ensuring the background image is suitable for digital image capturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a static background image sample is used for PCS testing, then the testing process is simple, but the results are subjective and inconsistent
Solution Approach 1:
The patent divides the document surface into multiple discrete target portions, each with its own defined region. Instead of using a single static background sample, the system segments the background into multiple regions corresponding to different locations on the document surface. This allows objective measurement of PCS at each specific location, eliminating subjectivity while maintaining operational simplicity through automated processing of each segment.
Solution Approach 2:
The patent creates a digital copy of the document image and processes this copy to determine reflectance values and PCS metrics. By working with a digital representation rather than physical measurement, the system achieves consistent, repeatable results. The digital copy can be processed multiple times by different equipment without variation, resolving the inconsistency problem while maintaining ease of operation through software-based analysis.
2Device complexity
If manual testing with static background samples is used, then equipment requirements are minimal, but time and cost efficiency are reduced
Solution Approach 1:
The patent replaces manual mechanical measurement processes with automated digital image processing. Instead of physical measurement tools and manual evaluation, the system uses software algorithms to analyze digital images, calculate reflectance values, and determine PCS compliance. This substitution dramatically improves productivity and cost efficiency while requiring only standard digital imaging equipment rather than specialized measurement devices.
Solution Approach 2:
The system performs self-service by automatically analyzing its own output images to determine PCS values and compliance status. The digital image processing system independently calculates reflectance, determines contrast ratios, and assesses compliance without requiring external manual evaluation. This automation significantly increases testing efficiency and reduces costs while maintaining minimal equipment requirements beyond standard digital imaging capabilities.
3Reliability
If check designs pass PCS testing with one equipment, then initial testing is successful, but they may fail when processed by other equipment
Solution Approach 1:
The patent establishes standardized PCS parameters and threshold values that can be consistently applied across different equipment systems. By defining specific reflectance requirements and contrast ratio thresholds for each target portion location, the system creates equipment-independent criteria. This standardization ensures that designs passing the test with one equipment will consistently pass with other equipment, as all measurements are based on the same objective parameters rather than equipment-specific characteristics.
Solution Approach 2:
The patent creates a universal PCS testing methodology that can be applied across multiple different image processing equipment systems. The digital image processing approach uses standardized algorithms and parameters that function identically on different devices. This universal approach allows a single testing protocol to serve multiple equipment types and manufacturers, ensuring consistent results and compatibility while maintaining reliability of initial testing success.
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 provides a more objective and efficient assessment of PCS compliance, reducing the likelihood of designs failing when processed by different equipment and minimizing costs associated with manual testing.
Implementation Method 1
an input module configured for obtaining a plurality of reflectance values distributed across the surface of the document
Data Source
AI summary
A plurality of PCS values are determined for a document having an area of interest containing critical data and a background image. Reflectance values distributed across the document are obtained and PCS threshold values corresponding to a plurality of locations on the document are stored in memory. Respective PCS values of a plurality of target portions of the surface are determined, each respective PCS value based on a reflectance value of the corresponding target portion and a reflectance value of a corresponding region located adjacent to the target portion, each of the regions being different for each target portion, each PCS value assigned a location representative of the location of the target portion, the size of the region being greater than the size of the target portion. The stored PCS threshold values are compared with the calculated PCS values to determine the acceptability of the background image.