Two-Dimensional Misregistration Visualization for Color Plates
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Solution Overview
Problem
Existing image evaluating methods only represent misregistration as a one-dimensional shift, making it difficult for operators to intuitively understand which color plate is shifted and to what extent, especially when only part of the color plates are tilted, leading to incomplete understanding of two-dimensional misregistration.
Innovation Solution
An image evaluating apparatus and method that calculates two-dimensional relative positions between color plates using registration marks and generates a position expressing image with vectors, frames, and graduated images to visually represent the extent of misregistration, allowing operators to grasp the shifts intuitively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If one-dimensional shift representation is used, then the measurement method is simple, but the operator cannot intuitively understand which color plate is shifted along which direction to what extent
Solution Approach 1:
The patent transforms the misregistration representation from one-dimensional (single direction) to two-dimensional by introducing vectors that display both the direction and magnitude of shifts for each color plate. This dimensional expansion allows operators to intuitively understand which color plate is shifted along which direction to what extent, directly resolving the contradiction between simplicity and intuitive understanding.
2Measurement precision
If graph representation is used, then the shift data is displayed, but the operator cannot grasp the extent of misregistration at first glance
Solution Approach 1:
The patent employs color-coded vectors where each vector's color corresponds to a specific color plate (e.g., cyan, magenta, yellow, black). This color coding allows operators to immediately identify which color plate has misregistration and the extent of the shift, enabling grasping of misregistration extent at first glance without requiring time to interpret monochrome graph data.
Solution Approach 2:
By representing misregistration as two-dimensional vectors with both direction and magnitude components, the system provides immediate visual feedback on the extent of misregistration. The vector length directly indicates the magnitude of shift, allowing operators to assess misregistration extent instantly rather than requiring time to analyze one-dimensional graph data.
3Manufacturing precision
If only part of the color plates are tilted, then the misregistration varies from position to position on the recording medium, but one-dimensional measurement cannot capture this variation
Solution Approach 1:
The patent implements two-dimensional vector representation that can capture misregistration variations across different positions on the recording medium. When only part of the color plates are tilted, the system can display position-specific vectors showing the local misregistration characteristics, enabling detection of two-dimensional misregistration patterns that one-dimensional measurement cannot capture.
Data Source
AI summary
The present invention relates to an image evaluating apparatus, an image evaluating method, and a non-transitory storage medium. In the present invention, two-dimensional relative positions between the image formation position of one color plate of a plurality of color plates and the image formation positions of other color plates are calculated based on known positional information of registration marks formed by the color plates and positional information of the registration marks that are actually formed as images on a recording medium. A position expressing image is generated which represents the calculated relative positions by way of two-dimensional positional coordinates.