Image Processing Apparatus Brightness Distribution Visualization
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Solution Overview
Problem
Conventional color conversion functions in image processing fail to accurately represent absolute and relative brightness values, leading to difficulties in confirming the distribution of brightness values, especially when the maximum values of HDR images are not displayed or are outside the display range.
Innovation Solution
An image processing apparatus and method that includes a converting unit to convert image data colors based on specific correspondences between brightness levels and colors, and a setting unit to set gradation characteristics, allowing for the appropriate display of brightness distributions by selecting between different gradation characteristics and display ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional color conversion function is used to convert colors based on brightness gradation values, then color conversion can be performed, but the user cannot recognize absolute brightness values and brightness distribution
Solution Approach 1:
The patent applies color changes by converting brightness values to corresponding colors through the color conversion function. Different brightness ranges are mapped to distinct colors, allowing users to visually recognize brightness distribution and absolute brightness values through color cues in the converted image.
2Ease of operation
If HDR setting function sets display range to match display apparatus capabilities, then appropriate display is achieved, but brightness values exceeding the setting HDR range cannot be recognized
Solution Approach 1:
The patent applies local quality by treating different brightness ranges with different color mappings. Brightness values within the setting HDR range are converted according to the gradation characteristic, while exceeding brightness values are assigned distinct colors to indicate they are outside the normal display range, preserving information about these extreme values.
3Productivity
If color conversion function converts all brightness values uniformly, then simple processing is achieved, but distribution of different brightness ranges cannot be distinguished
Solution Approach 1:
The patent applies segmentation by dividing the brightness range into multiple segments and assigning different color conversion rules to each segment. The color conversion function processes different brightness ranges differently, creating distinct color representations for different brightness levels while maintaining efficient processing through structured segmentation.
Data Source
AI summary
An image processing apparatus includes: a converting unit configured to convert a color of input image data based on information representing a correspondence between a brightness level and a color, and generate converted image data; and a setting unit configured to set a gradation characteristic of the input image data, wherein the converting unit converts the color of the input image data based on information representing a first correspondence in a case where the gradation characteristic set by the setting unit is a first gradation characteristic, and converts the color of the input image data based on information representing a second correspondence in a case where the gradation characteristic set by the setting unit is a second gradation characteristic.