Dynamic Range Conversion for Print Sheet and Viewing Environment
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Solution Overview
Problem
Existing image processing methods fail to achieve optimal printing quality by not considering the dynamic range of the print sheet and viewing environment, leading to issues with brightness and contrast in printed images.
Innovation Solution
An image processing apparatus and method that obtain and determine the dynamic range of a captured image, perform conversion processing to match the print sheet characteristics and viewing environment, ensuring appropriate brightness and contrast in the printed product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional image processing methods are used without considering print sheet characteristics and viewing environment, then processing simplicity is maintained, but printing quality and image brightness appropriateness deteriorate
Solution Approach 1:
The system performs preliminary determination of the output dynamic range based on print sheet characteristics and viewing environment before executing the conversion processing. This allows the conversion unit to pre-calculate appropriate mapping curves and processing parameters, ensuring optimal printing quality without adding complexity to the actual conversion operation.
Solution Approach 2:
The invention introduces an intermediate determination step that acts as a mediator between the input image data and the conversion processing. The determination unit calculates the output dynamic range as an intermediary parameter, which then guides the conversion unit to perform appropriate luminance conversion, bridging the gap between generic processing and customized quality optimization.
2Manufacturing precision
If dynamic range conversion is performed without considering viewing environment, then processing speed is maintained, but image brightness and contrast quality deteriorate
Solution Approach 1:
The system applies local quality by determining different output dynamic ranges for different viewing environments (e.g., illuminated vs. non-illuminated displays). The conversion processing is customized according to the specific viewing conditions, ensuring appropriate brightness and contrast for each scenario without requiring complete reprocessing for different conditions.
Solution Approach 2:
The invention changes the processing parameters (output dynamic range values) based on viewing environment characteristics. By adjusting the luminance and black level parameters according to whether the display is illuminated or not, the system maintains processing efficiency while achieving accurate brightness reproduction for different viewing conditions.
3Manufacturing precision
If print sheet characteristics are not considered in processing, then device simplicity is maintained, but dynamic range reproduction capability deteriorates
Solution Approach 1:
The determination unit performs preliminary analysis of print sheet characteristics (glossy vs. mat) before conversion processing. Based on this preliminary determination, the system selects appropriate output dynamic range parameters that match the sheet characteristics, enabling accurate dynamic range reproduction without adding complex real-time adjustments during conversion.
Data Source
AI summary
An image processing apparatus comprises: an obtaining unit configured to obtain a dynamic range of a captured image on captured image data; a determination unit configured to determine a dynamic range of a printed product when viewed obtained by printing the captured image based on the captured image data, based on printing information on viewing of the printed product; and a conversion unit configured to perform conversion processing for luminance of the captured image data to the dynamic range determined by the determination unit from the dynamic range obtained by the obtaining unit.