Image Processing Device Luminance Region Segmentation
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Solution Overview
Problem
Converting image data exceeding 8 bits to 8-bit data results in a decrease in brightness resolution during image recognition.
Innovation Solution
An image processing device calculates pixel counts by region and selects regions based on pixel luminance to set luminance values within those regions to either the minimum or maximum value, maintaining high brightness resolution when reducing gradations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If image data exceeding 8 bits is simply converted to 8-bit image data, then processing load is reduced, but brightness resolution decreases
Solution Approach 1:
The patent divides the luminance range into multiple regions and calculates pixel counts for each region. By segmenting the luminance data and analyzing distribution characteristics, the system identifies appropriate regions for gradation mapping, thereby preserving brightness resolution in critical areas while enabling efficient 8-bit conversion.
Solution Approach 2:
The patent applies different gradation mapping strategies to different luminance regions based on their pixel count characteristics. Regions with specific pixel count ratios receive tailored gradation assignments, ensuring that important luminance ranges maintain high brightness resolution while less critical regions are compressed efficiently.
2Productivity
If the number of gradations in image data is reduced, then processing efficiency improves, but brightness resolution decreases
Solution Approach 1:
The patent changes the gradation parameter mapping by calculating pixel counts for different luminance regions and selecting optimal mapping strategies. This dynamic parameter adjustment ensures that the reduction in gradation number (from 10-bit to 8-bit) does not uniformly degrade brightness resolution, but instead maintains it in critical regions identified through pixel count analysis.
Data Source
AI summary
In image data having a first number of gradations, an image processing device calculates the number of pixels having luminance within a region, for each region obtained by dividing the range of luminance in the image data into a plurality of regions. The image processing device selects a region from the plurality of regions based on the number of pixels having luminance within the region. The image processing device sets the luminance of the pixels having luminance within the selected region to be within a second number of gradations that is less than the first number of gradations, and sets the luminance of pixels having luminance within a region that has not been selected to a minimum value or a maximum value.