Image Processing Apparatus HDR SDR Display Adaptability
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Solution Overview
Problem
Standard image reproduction software cannot accurately reproduce the original appearance of HDR and SDR capture images due to inability to read and control backlight emission brightness, leading to inconsistent display and comparison issues between HDR and SDR images, as well as variations in display appearance among HDR images captured in different dynamic ranges.
Innovation Solution
An image processing apparatus and method that allows setting of multiple processing modes for different brightness ranges, enabling the generation of frame image data in one state and capture image data in another, adjusted state to ensure consistent display and comparison of HDR and SDR images by adjusting pixel values based on calculated gain values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HDR images are captured and displayed with different display ranges, then the display adaptability is improved, but the consistency of appearance across different capture images deteriorates
Solution Approach 1:
The patent applies preliminary action by calculating and storing gain values before image capture based on the display range characteristics. These gain values are pre-computed to compensate for the display range differences, ensuring that when images are captured and displayed later, they maintain consistent appearance regardless of the original display range used during capture
Solution Approach 2:
The patent changes the parameter of pixel values by applying calculated gain values to adjust the brightness characteristics. This parameter transformation allows HDR capture images taken with different display ranges to be normalized to a consistent appearance, resolving the contradiction between display adaptability and appearance consistency
2Ease of operation
If standard image reproduction software is used, then the ease of operation is improved, but the measurement precision of light emission brightness deteriorates
Solution Approach 1:
The patent introduces an intermediary component that acts as a bridge between standard image reproduction software and the backlight unit. This intermediary translates standard software operations into precise backlight control commands, enabling standard software to achieve precise control over light emission brightness without requiring specialized software
3Adaptability or versatility
If capture images are taken in different display ranges, then the adaptability to different display devices is improved, but the comparability of capture images deteriorates
Solution Approach 1:
The system performs preliminary calculation of gain values based on the specific display range characteristics before capturing images. These pre-calculated gain values are stored and applied during image processing to ensure that capture images from different display ranges can be accurately compared, while still maintaining adaptability to different display devices
Solution Approach 2:
The patent transforms the pixel value parameters of capture images by applying gain values that compensate for display range differences. This parameter adjustment enables accurate comparison of capture images while preserving the ability to adapt to various display devices with different brightness capabilities
Data Source
AI summary
An image processing apparatus according to the present invention includes at least one memory and at least one processor Which function as: a setting unit configured to he capable of setting any of a plurality of processing modes which include a first processing mode to display an image having a first brightness range and a second processing mode to display an image having a second brightness range which is narrower than the first brightness range and a processing unit configured to generate frame image data, which is a display target, in a first state in which image processing in accordance with a currently set processing mode is performed, and generates a capture image data corresponding to the frame image data in a second state after changing the first state in accordance with the currently set processing mode.