Edge Enhancement Mechanism With Compensation Inversion
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Solution Overview
Problem
Edge enhancement processes in high-speed production printers can negate the results of uniformity and jet-out compensations, leading to undesirable density variations in printed output.
Innovation Solution
An edge enhancement mechanism that maintains uniformity and jet-out compensation by using edge enhancement inverse transfer functions to modify halftone thresholds while disabling defective nozzles, ensuring that edge enhancement does not interfere with existing compensation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If edge enhancement processing is applied to improve edge contrast, then edge definition is improved, but uniformity compensation results are negated causing density variations
Solution Approach 1:
The processing is segmented into two distinct paths: edge enhancement processing for edge pels and compensation processing for non-edge pels. The system determines whether each pel is an edge pel and applies different processing accordingly, allowing edge definition improvement without compromising uniformity compensation in non-edge regions.
Solution Approach 2:
Different processing quality is applied to different regions: edge enhancement is applied locally to edge pels to improve edge contrast, while compensation processing is applied to non-edge pels to maintain uniformity. This local differentiation resolves the contradiction by allowing both improvements in their respective domains.
2Manufacturing precision
If edge enhancement processing is applied to enhance edge contrast, then edge visibility is improved, but jet-out compensation results are negated causing density variations
Solution Approach 1:
The system segments the processing based on pel type, applying edge enhancement only to edge pels and compensation processing to non-edge pels. This segmentation allows jet-out compensation to remain effective for non-edge regions while edge enhancement improves edge contrast where needed.
Solution Approach 2:
Local quality enhancement is applied selectively to edge regions without affecting the compensation results in non-edge regions. The system applies different processing qualities locally: edge enhancement for edge pels and compensation processing for non-edge pels, preserving jet-out compensation effectiveness.
3Reliability
If uniformity compensation is applied to maintain consistent density, then density uniformity is improved, but edge contrast is reduced
Solution Approach 1:
The processing is divided into two segments: compensation processing for non-edge pels that maintains density uniformity, and edge enhancement processing for edge pels that improves edge contrast. This segmentation allows both objectives to be achieved in their respective domains without conflict.
Data Source
AI summary
A system is disclosed. The system includes at least one physical memory device to store edge enhancement logic and one or more processors coupled with the at least one physical memory device to execute the edge enhancement logic to receive a plurality of pels in a continuous tone image (CTI), receive a first halftone design associated with each of the plurality of pels, receive compensation data for pel forming elements associated with each of the plurality of pels, receive edge enhancement inverse transfer functions, determine whether each of the plurality of pels is an edge pel, perform edge enhancement processing for each of the determined edge pels, including generating a final halftone design for the pel based on the first halftone design associated with the pel, the edge enhancement inverse transfer function associated with the pel, and the compensation data associated with the pel and perform compensation processing for each of the determined not edge pels, including generating a final halftone design for the pel based on the first halftone design associated with the pel, and the compensation data associated with the pel.