Text Color Modification in Digital Image Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Multi-Function Devices (MFDs) using N-layer Mixed Raster Content (MRC) compression techniques often result in jaggy text and undesired changes in text colors during image processing, leading to customer complaints due to the inability to accurately extract and maintain text colors in digital images.
Innovation Solution
A graphical user interface (GUI) is provided to facilitate the modification of text colors in digital images, allowing users to input and select the number of text colors, with an image processing module that generates a modified digital image with the specified text colors, and additional options for securing confidential data by hiding, masking, or eliminating sensitive information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If N-layer MRC compression technique is used to separate text and pictorial parts, then text quality and OCR accuracy are improved, but text color changes and jaggy text occur
Solution Approach 1:
The patent segments the image processing into multiple layers including a continuous tone background layer for pictorial content and multiple binary text layers for different text colors. This segmentation allows independent processing of text and background, preserving text color accuracy while maintaining OCR accuracy through separate layer compression using techniques like G4 or JBIG2.
Solution Approach 2:
The patent adds a color preservation dimension to the traditional binary text layer approach by creating multiple binary layers each representing a specific text color. This dimensional expansion allows the system to maintain both OCR accuracy (through binary separation) and text color accuracy (through dedicated color layers)
Solution Approach 3:
The patent changes the compression parameters differently for different layers: using lossless binary compression (G4/JBIG2) for text layers to preserve text quality and color, while using continuous tone compression (JPEG) for the background layer. This parameter differentiation resolves the contradiction between compression efficiency and text color fidelity.
2Measurement precision
If all text regions are extracted into binary layers to fix jaggy text, then OCR accuracy improves, but text color changes occur
Solution Approach 1:
The patent segments text extraction by color, creating separate binary layers for each text color present in the document. This color-based segmentation ensures that text is extracted into appropriate binary layers without color mixing, preventing both jaggy text and unwanted color changes while maintaining OCR accuracy.
Solution Approach 2:
The patent applies different processing qualities to different text regions based on their color characteristics. Each text color region is processed with appropriate binary layer extraction parameters, allowing local optimization of both text quality and color preservation for different parts of the document.
Data Source
AI summary
A Graphical User Interface (GUI) is provided for facilitating modification of text colors in a digital image. In an embodiment, the GUI includes a first user interface adapted to display a selectable first set of text colors to appear in a modified digital image. In another embodiment, the GUI includes a second user interface adapted to display a selectable first set of text colors to appear in a modified digital image. In yet another embodiment, the GUI includes various options to facilitate securing of confidential data in the digital image.