Luminance Conversion for Display Adaptability
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Solution Overview
Problem
Existing image processing technologies face challenges in faithfully reproducing the intended image representation and maintaining detail in high-luminance areas due to limitations in display luminance range, leading to information loss and varying visibility across different display apparatuses.
Innovation Solution
An image processing apparatus that acquires image data, determines a conversion rule based on the display's linear luminance range, and adjusts tone mapping to ensure the luminance range of critical image elements falls within the display's capabilities, maintaining detail and stability across different display conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the luminance range is compressed in the high-luminance area to fit the display's luminance range, then the image can be displayed within the display's capabilities, but information is lost and details in bright locations may not be viewed
Solution Approach 1:
The patent applies preliminary action by performing luminance conversion before image display. The image processing apparatus converts the luminance range of the image data to match the display device's luminance range in advance, using a conversion rule determined from the display's characteristics. This preliminary conversion ensures that the image can be properly displayed while preserving as much information as possible through optimized tone mapping.
Solution Approach 2:
The patent applies parameter changes by modifying the luminance parameters of the image data. The luminance conversion section changes the luminance values according to a conversion rule that maps the original luminance range to the display's luminance range. This parameter transformation allows the image to adapt to different display capabilities while maintaining visual quality.
2Manufacturing precision
If the luminance of each pixel is adjusted based on display control methods and luminance distribution, then the image can be optimized for the specific display, but the ease of viewing changes depending on display conditions
Solution Approach 1:
The patent applies feedback by using the display device's luminance range information to determine the conversion rule. The image processing apparatus receives feedback about the display's capabilities and adjusts the luminance conversion accordingly. This feedback mechanism ensures that the converted image maintains consistent viewing quality across different display conditions.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the luminance conversion parameters based on the display's characteristics. The conversion rule is determined from the display's luminance range, and the luminance values are transformed according to this rule. This parameter adaptation ensures precise luminance control while maintaining viewing consistency across different displays.
3Adaptability or versatility
If a wide luminance space is used to implement dynamic image representation, then the image can represent a broader range of luminance values, but it is difficult to faithfully reproduce the original image world-view due to display limitations
Solution Approach 1:
The patent applies preliminary action by performing luminance conversion before image display. The image processing apparatus converts the luminance range of the image data to match the display device's luminance range in advance, using a conversion rule determined from the display's characteristics. This preliminary conversion ensures that the image can be properly displayed while preserving as much information as possible through optimized tone mapping.
Solution Approach 2:
The patent applies the intermediary principle by introducing a luminance conversion section as a mediator between the wide luminance space image data and the limited luminance range display. This intermediary component transforms the luminance values according to a conversion rule, enabling faithful reproduction of the original image world-view within the display's capabilities.
Data Source
AI summary
Disclosed herein is an image processing apparatus including: an image data acquisition section configured to acquire data of an image; a luminance conversion section configured to convert a luminance range composing a pixel value of the image so as to correspond to the luminance range capable of an output as a display image; and an output section configured to output the data of the image in which a luminance after the conversion is defined as the pixel value. The luminance conversion section acquires information regarding a linear luminance range capable of an output in the luminance that is proportional to a setting luminance in a display and determines a conversion rule at least on a basis of the information.