Printing Device Brightness Region Segmentation for Dynamic Range
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Solution Overview
Problem
Existing printing technologies fail to effectively change basic colors in response to pixel brightness in original image data and do not achieve a wide dynamic range in printing materials, especially when using deep achromatic colors.
Innovation Solution
The solution involves producing first and second print data based on image data to control the printing of achromatic and chromatic color materials, where the brightness of the first print layer is adjusted relative to the second print layer, allowing for a wider dynamic range by defining specific brightness regions and using a look-up table to determine the appropriate color materials and their transmissivities for each pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If white ink is printed as the first print layer corresponding to dark pixels in original image data, then the dark pixel can be realized, but the dynamic range of the printing material is limited
Solution Approach 1:
The patent segments the brightness range of pixels into multiple brightness regions (first brightness region and second brightness region). By dividing the brightness range, the system can apply different achromatic color materials with different transmissivities to different regions, thereby expanding the overall dynamic range while maintaining accurate brightness reproduction for each region.
Solution Approach 2:
The patent changes the transmissivity parameter of achromatic color materials based on the brightness region. By selecting achromatic color materials with different transmissivities (e.g., first transmissivity for first brightness region, second transmissivity for second brightness region), the system can reproduce a wider dynamic range while maintaining manufacturing precision for brightness.
2Ease of manufacture
If a single achromatic color material is used for the first print layer, then the printing process is simple, but the brightness range and dynamic range are limited
Solution Approach 1:
The patent applies different achromatic color materials with different transmissivities to different brightness regions. This local differentiation allows the system to cover a wider brightness range and achieve better dynamic range, while still maintaining relatively simple printing processes by using a predetermined plurality of achromatic color materials.
Data Source
AI summary
A basic color to be printed in achromatic colors (a layer superimposed with another layer) is changed in response to the brightness of a pixel indicated by the original image data.