Imaging System Medium Luminance Reference for Wide Dynamic Range
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Solution Overview
Problem
Conventional imaging systems for biological samples in culture media struggle with nonlinearity in sensitivity, leading to limited dynamic range and invalid gradation values when attempting to correct luminance, resulting in suboptimal image expression.
Innovation Solution
An imaging system that performs gradation correction by associating luminance values corresponding to the medium's luminance with the maximum gradation value, ensuring effective multi-gradation image data representation across a wide dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gradation correction technique is applied to imaging biological samples in medium, then luminance correction is achieved, but dynamic range is limited due to invalid gradation values
Solution Approach 1:
The patent changes the reference parameter for gradation correction from white paper luminance to medium luminance. By setting the medium's luminance value as the reference point (associating it with maximum gradation value), the correction curve is adjusted to match the actual luminance range present in biological sample images, thereby eliminating invalid gradation values and expanding the effective dynamic range.
2Measurement precision
If gradation correction focuses on intermediate gradations, then document reading accuracy is improved, but biological sample image expression deteriorates
Solution Approach 1:
Instead of using the conventional approach where white (maximum luminance) is the reference for gradation correction, the patent inverts the reference point to the medium luminance (minimum useful luminance in the image). This inversion allows the gradation correction to properly utilize the entire range of luminance values actually present in biological sample images, from the medium background through to the sample features.
Data Source
AI summary
An imaging system for imaging a sample in a medium carried in a container WP as an imaging object comprises: an imaging object includes an imager which obtains an original image by imaging the imaging object; and a data processor which generates multi-gradation image data by performing a gradation correction on the original image, wherein the data processor associates a luminance value corresponding to a luminance of the medium in the original image with a maximum gradation value in the gradation correction.