Tagged Outlined Text Metadata for PDF Search and Preflighting

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Solution Overview

Problem

Outlined text in PDF files is not searchable and is not amenable to optical character recognition (OCR), making it difficult to identify and modify text elements, especially in printing workflows where font size and color requirements need to be checked for preflighting and compliance with branding and regulatory standards.

Innovation Solution

A method and system for identifying and tagging graphics objects representing text characters in a file, incorporating metadata that includes font, size, style, language, fill color, and location, allowing for searching, preflighting, and replacing text elements, thereby enhancing text recognition and compliance checking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If text is converted to outlines in PDF files, then font rendering consistency and design protection are improved, but text searchability and OCR capability are lost

Engineering Contradiction:

Improvefont rendering consistencyVSAvoidtext searchability

Core Design Contradiction:

ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent segments the text information from the graphical outline representation by introducing a separate metadata layer. The text is converted to outlines for visual rendering, while simultaneously extracting text content, font properties, and positional information into structured metadata tags that remain machine-readable and searchable independently of the outline graphics.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces metadata tags as an intermediary layer between the outlined text graphics and the search/OCR systems. These tags contain the original text content and font information, acting as a mediator that enables text processing without requiring reversal of the outline conversion, thus preserving both rendering consistency and searchability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If text is converted to outlines in PDF files, then design protection against unauthorized modification is improved, but text modification and compliance checking become difficult

Engineering Contradiction:

Improvedesign protectionVSAvoidtext modification

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent separates text data into two independent representations: outlined graphics for final rendering and protected design elements, and structured metadata tags for text content, font properties, and positional information. This segmentation allows modification operations to target the metadata layer without affecting the outline graphics, enabling easy text editing while maintaining design protection.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The metadata tags serve as an intermediary layer that facilitates text modification and compliance checking. By storing text content and font information in this separate layer, the system enables operations such as text replacement, font verification, and branding compliance checks without requiring modification of the protected outline graphics, thus maintaining design integrity while enabling operational flexibility.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Difficulty of detecting and measuring

If conventional OCR is applied to outlined text by rendering to raster format, then text recognition is achieved, but processing speed decreases and accuracy is reduced

Engineering Contradiction:

Improvetext recognition capabilityVSAvoidprocessing speed

Core Design Contradiction:

Difficulty of detecting and measuringVSProductivity

Solution Approach 1:

The patent performs preliminary extraction of text content, font properties, and positional information during the outline conversion process itself. By capturing this information in structured metadata tags before any OCR or rendering operations are needed, the system eliminates the need for time-consuming raster rendering and subsequent OCR processing, achieving instant text recognition at the source.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces the mechanical OCR process (which requires rendering outlined text to raster format and then analyzing pixel patterns) with a direct data extraction approach. By storing text content and font information in structured metadata during the vector outline creation process, the system substitutes the complex mechanical OCR workflow with simple metadata parsing, dramatically improving processing speed and accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11797750B2Methods and systems for identifying and tagging outlined or converted text

Publication Date: 2023.10.24 GLOBAL GRAPHICS SOFTWARE

AI summary

A method for modifying a printable file includes receiving the printable file; identifying an element representing one or more text characters in the printable file; tagging the element; and incorporating metadata in the printable file, wherein the metadata is associated in the printable file with the tagged element and includes the one or more text characters. A method for using a printable file including at least one tagged graphics object that represents one or more characters and associated metadata includes receiving the printable file; and performing an activity using the printable file and the metadata within the printable file.