Color Parameter Generation with Flare Degree Correction
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Solution Overview
Problem
The existing color parameter generation apparatuses face challenges in accurately generating color parameters due to differences in flare influence between sample images and chart images used for scanner profile generation, leading to potential errors in printed colors, especially when the flare effect is significant.
Innovation Solution
A color parameter generation apparatus that determines the flare degree at specific positions of a read image and executes processing to correct the color parameters based on this determination, allowing users to select whether to apply corrections, thereby ensuring accurate color parameter generation and minimizing flare-induced errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a scanner profile is generated based on a chart image with patches arranged in a predetermined order, then the degree of influence of flare can be equalized in each color, but the flare influence at corresponding positions may still differ between the chart image and the sample image, leading to inaccurate color parameters
Solution Approach 1:
The patent applies local quality by determining the flare degree separately at each predetermined position in the read image and applying position-specific correction processing. Instead of using a uniform correction approach, the system adjusts color parameters locally at each position based on its specific flare characteristics, thereby achieving accurate color parameters while accounting for position-dependent flare variations between different images
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting color parameters based on the determined flare degree at each position. The system modifies the color values in the read image according to the calculated flare influence, transforming the parameters to compensate for flare effects and achieve accurate color representation despite differences between chart and sample images
2Adaptability or versatility
If color conversion is performed using a predetermined color conversion table (device profile), then color values can be converted between different devices, but the color value of the read information may not match the color value output by the image forming apparatus due to device-specific color characteristics
Solution Approach 1:
The patent applies feedback by using the read image from the sample image as a reference to determine and correct color parameters. The system reads the actual printed sample image, determines the flare degree at each position, and uses this feedback information to adjust the color parameters, thereby achieving accurate color representation that accounts for both device characteristics and actual printing conditions
Solution Approach 2:
The patent implements preliminary action by generating a scanner profile beforehand that can be used for color conversion, and then further refining the color parameters based on the actual sample image reading. The system prepares the color conversion infrastructure in advance while maintaining the flexibility to adjust parameters based on actual measurements, ensuring both adaptability and precision
Data Source
AI summary
A color parameter generation apparatus includes a hardware processor that generates color parameters to be used for printing a sample image based on a read image, in which the hardware processor determines a flare degree at a predetermined position of the read image, and executes predetermined processing for correcting the color parameters in the predetermined position based on the determined flare degree.