Spot Color Ink Data Conversion Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When using spot colors for printing, color value shifts in image data can lead to a reduction in printing effect due to the spot color, especially after lossy compression processes like JPEG.
Innovation Solution
A processing apparatus and method that generates ink data using conversion information to convert color values in a color space, allowing for the preservation of printing effects by associating ink colors with coordinates and separating ink data into subtractive color mixture and spot color data, even when color values shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spot color is used for printing image data, then printing effect is enhanced, but color value shift reduces the printing effect
Solution Approach 1:
The patent applies preliminary action by detecting spot color regions in the image data before the printing process, and pre-processing these regions to prevent color value shifts. The image processing apparatus identifies coordinates corresponding to spot colors and applies specific processing to these coordinates prior to printing, ensuring that the spot color printing effect is maintained even when color values shift during processing.
2Reliability
If color conversion is performed to maintain spot color, then printing effect is preserved, but processing complexity increases
Solution Approach 1:
The patent applies local quality by performing color conversion and processing only on specific coordinates corresponding to spot color regions, rather than processing the entire image. The image processing apparatus identifies and processes only the necessary coordinates where spot colors are present, leaving other areas unchanged. This localized approach maintains printing effect while minimizing processing complexity.
Data Source
AI summary
The first conversion information is information for converting a color value of a first coordinate in a color space corresponding to the image data into ink data corresponding to ink of subtractive color mixture, and converting a color value of a second coordinate in the color space into ink data corresponding to ink of spot color which is different from a color of the ink of the subtractive color mixture. At least one of a plurality of coordinates adjacent to the second coordinate is the second coordinate.