Image Processing Apparatus Gradation Conversion for Enlarged HDR Regions
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Solution Overview
Problem
Non-HDR display apparatuses, commonly used due to restrictions on power sources and portability, struggle to accurately display HDR image data, leading to entirely dark images during enlargement displays, which hinders focus confirmation for users.
Innovation Solution
An image processing apparatus that switches between two display modes: a first mode for general HDR assist display and a second mode for enhanced gradation conversion during enlargement displays, improving luminance in critical areas to facilitate focus confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If HDR assist display mode is used on non-HDR display apparatus, then gradation can be confirmed, but display luminance becomes too low for easy focus confirmation
Solution Approach 1:
The patent applies local quality by differentiating display processing between the enlargement region and non-enlargement region. When enlargement display is detected, the system applies enhanced gradation conversion specifically to the enlargement region, while maintaining normal conversion for other regions. This localized approach ensures high luminance and improved gradation in the critical enlargement area where focus confirmation occurs, without affecting the overall display characteristics.
Solution Approach 2:
The patent implements dynamics by switching between different display modes (first display mode for normal HDR assist display, second display mode for enhanced enlargement display). The system dynamically adjusts gradation conversion parameters based on the detected display scenario, transitioning from standard conversion to enhanced conversion when enlargement display is activated, thereby adapting luminance and gradation characteristics to the specific operational context.
2Adaptability or versatility
If linear gradation conversion is applied for HDR assist display, then display luminance range is maximized, but gradation detail is lost in dark regions
Solution Approach 1:
The patent applies local quality by implementing region-specific gradation conversion. For the enlargement region, it applies enhanced conversion that prioritizes gradation detail and luminance in dark regions, while for non-enlargement regions, it maintains standard HDR assist conversion that maximizes overall luminance range. This localized differentiation resolves the contradiction by optimizing for different goals in different spatial locations.
Solution Approach 2:
The patent implements parameter changes by switching between different gradation conversion parameters based on display mode. In the first display mode, linear conversion parameters are used to maximize luminance range. In the second display mode (enlargement), the system changes to enhanced conversion parameters that improve gradation detail and luminance in critical dark regions, thereby adapting the conversion characteristics to the specific display requirements.
3Area of stationary object
If enlargement display is performed with standard HDR assist mode, then display coverage is maintained, but focus confirmation becomes difficult due to low luminance
Solution Approach 1:
The patent applies local quality by implementing region-specific gradation conversion. For the enlargement region, it applies enhanced conversion that prioritizes gradation detail and luminance in dark regions, while maintaining normal conversion for other regions. This localized approach ensures high luminance and improved gradation in the critical enlargement area where focus confirmation occurs, without affecting the overall display characteristics.
Solution Approach 2:
The patent implements dynamics by switching between different display modes (first display mode for normal HDR assist display, second display mode for enhanced enlargement display). The system dynamically adjusts gradation conversion parameters based on the detected display scenario, transitioning from standard conversion to enhanced conversion when enlargement display is activated, thereby adapting luminance and gradation characteristics to the specific operational context.
Data Source
AI summary
An image processing apparatus includes a setting unit configured to set at least one of a plurality of display modes including a first display mode and a second display mode, and a processing unit configured to perform first gradation conversion processing on input image data when the first display mode is set, and to perform second gradation conversion processing on the input image data when the second display mode is set, wherein the second gradation conversion processing improves a gradation of a part of a gradation range of the input image data to a further extent than the first gradation conversion processing. Upon reception of an instruction for displaying an enlarged image of a part of an image region of the input image data in a state where the first display mode is set, the first display mode is canceled and the second display mode is set.