Covert Dot Pattern Embedding in Print Rendering
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Solution Overview
Problem
Printing devices face performance issues when modifying print-ready RGB data to form covert markings, as it can adversely affect the page per minute rate and print rendering performance.
Innovation Solution
The system renders page description language and determines object type images to create covert dot patterns without modifying the RGB data, using a color conversion table to adjust pixel colors and embed these patterns into the print medium, allowing for covert markings without impacting printing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If print-ready RGB data is modified to form covert markings, then covert markings can be embedded in the print medium, but the page per minute rate and print rendering performance are adversely affected
Solution Approach 1:
The patent applies preliminary action by determining the object type image and identifying pixels for covert markings before the RGB data rendering process begins. This allows the covert marking information to be prepared in advance and passed to the printing device without requiring modifications during the rendering phase, thus avoiding delays in the printing process and maintaining page per minute rate.
Solution Approach 2:
The patent segments the image processing into distinct components: determining object type images, identifying pixels for covert markings, and rendering RGB data. By separating the covert marking identification from the RGB rendering process, the system can handle covert markings without interfering with the main rendering pipeline, thereby preserving printing speed and performance.
2Loss of information
If print-ready RGB data is modified to form covert markings, then covert markings can be embedded in the print medium, but the print rendering performance is adversely affected
Solution Approach 1:
The system performs preliminary determination of object type images and identification of pixels for covert markings before RGB data rendering starts. This advance preparation ensures that covert marking information is ready when needed, eliminating any potential delays during the rendering process and maintaining efficient print rendering performance.
Solution Approach 2:
The patent extracts the covert marking information determination and pixel identification processes from the main RGB data rendering workflow. By separating these functions, the system avoids adding computational overhead to the rendering process itself, thus preventing negative impacts on print rendering performance.
3Productivity
If covert dot patterns are formed without modifying RGB data, then printing speed is maintained, but additional processing steps are required
Solution Approach 1:
The patent merges the covert marking determination and pixel identification processes into the existing image processing pipeline before RGB rendering. By integrating these functions into the workflow that already exists, the system avoids adding significant complexity while maintaining printing speed, as the additional processing is performed on already-available image data.
Data Source
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AI summary
Examples described herein relate to a system consistent with the disclosure. For instance, the system may comprise a printing device including hardware to form markings on a print medium, a memory resource, and a controller to receive a print job to form the markings on the print medium, render a page description language of the print job to form the markings, determine an object type image of the print job, designate pixels of the determined object type image to form a covert dot pattern on the image, and adjust colors of the designated pixels to form the covert dot pattern on the markings.