Image Processing Apparatus for High-Luminance Soft-Proofing
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Solution Overview
Problem
Current color management systems using ICC profiles fail to accurately soft-proof high-dynamic-range images intended for exhibition in high-luminance lighting environments, as they do not account for changes in luminance, leading to inadequate representation on monitors set to standard lighting conditions.
Innovation Solution
An image processing apparatus that adjusts the luminance of a display device to match the observation environment's lighting conditions, performing dynamic-range compression and converting image data to ensure accurate representation of high-luminance images on both printers and monitors, allowing for soft-proofing of images intended for high-luminance exhibition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ICC profiles are used for color conversion in standard lighting conditions, then color accuracy for normal lighting is improved, but soft-proofing accuracy for high-luminance exhibition environments deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing luminance as an additional parameter to the traditional color conversion process. Instead of using only ICC profiles for color space conversion, the system modifies the conversion parameters to include luminance adaptation based on the observation environment, enabling accurate soft-proofing for both standard and high-luminance conditions
Solution Approach 2:
The patent implements dynamics by making the color conversion process adaptive to different observation environments. The system dynamically adjusts the conversion based on whether the target environment is standard lighting or high-luminance exhibition lighting, rather than using a fixed conversion profile
2Adaptability or versatility
If D-range compression is performed into normal lighting luminance (100 cd/m2), then compatibility with standard monitors is improved, but representation accuracy for high-luminance exhibition environments deteriorates
Solution Approach 1:
The patent applies local quality by providing different D-range compression strategies for different observation environments. Instead of uniformly compressing all images to 100 cd/m2, the system selectively applies compression based on the target environment, preserving high-luminance characteristics when exhibition lighting is the intended observation condition
3Illumination intensity
If printed products are created for high-luminance lighting exhibition, then printing effect in exhibition environment is improved, but appearance in normal lighting deteriorates
Solution Approach 1:
The patent applies preliminary action by performing soft-proofing with high-luminance simulation before actual printing. This allows the observer to preview how the printed product will appear in the exhibition environment, enabling adjustments to be made before production, thus ensuring the printing effect meets the desired high-luminance exhibition requirements
Data Source
AI summary
An image processing apparatus for displaying on a display device an image corresponding to a printed product observed in a predetermined observation environment. The apparatus includes one or more memories storing instructions, and one or more processors executing the instructions to obtain image data, to obtain a lighting luminance in the predetermined observation environment, to set a maximum luminance to be displayed in the display device according to the obtained lighting luminance, to convert the obtained image data according to the obtained lighting luminance, and to output the converted image data to the display device whose maximum luminance to be displayed has been set according to the obtained lighting luminance.