Volume Renderer Virtual Light Tissue Representation
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Solution Overview
Problem
Current medical imaging technologies, such as X-ray and MRI, struggle to provide realistic representations of internal tissues due to limitations in black-and-white images, which restrict detailed and accurate visualization.
Innovation Solution
An imaging processing apparatus and method that generates volume data and applies translucent volume rendering using virtual light, determining pixel values based on distances between surface points visible from the user's viewpoint and virtual light positions, to produce a more realistic color image of internal tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If black-and-white images are used for medical imaging, then the imaging process is simple and fast, but the realistic representation of internal tissues is limited
Solution Approach 1:
The patent applies color mapping to black-and-white medical images by assigning colors similar to actual tissue colors, transforming grayscale images into color images that provide more realistic representation of internal tissues while maintaining the simplicity of the underlying imaging process
Solution Approach 2:
The patent transitions from 2D black-and-white images to 3D color volume images by performing volume rendering on 3D volume data, adding the dimension of depth and color to enhance realistic representation while managing computational complexity through efficient rendering techniques
2Reliability
If color mapping is applied to black-and-white images, then realistic expression is improved, but the complexity of image processing increases
Solution Approach 1:
The patent implements color mapping by selecting colors that match actual tissue appearances and applying them to corresponding regions in the medical images, achieving realistic expression through a systematic color assignment process that manages processing complexity
Solution Approach 2:
The patent transforms image parameters from grayscale intensity values to color values with multiple components (RGB or other color spaces), enhancing realistic expression while using efficient algorithms to manage the increased processing requirements of color parameter manipulation
3Reliability
If traditional volume rendering is used, then the processing speed is maintained, but the realistic representation of tissue structures is insufficient
Solution Approach 1:
The patent performs preliminary calculations of distances between surface points and virtual light positions before the main rendering process, preparing lighting and shading information in advance to enhance tissue structure representation without significantly impacting overall processing speed
Solution Approach 2:
The patent replaces traditional lighting models with a virtual light system that calculates illumination based on geometric relationships between surface points and light positions, providing more realistic tissue structure representation while maintaining computational efficiency through mathematical formulations
Data Source
AI summary
Disclosed herein are an imaging processing apparatus for representing an object realistically, and an imaging processing method thereof. The image processing apparatus includes: a volume data generator configured to generate volume data of an object; a volume renderer configured to project the volume data to a first plane with respect to a user's viewpoint, and to acquire a projection image, wherein the volume renderer determines a value of each pixel of the projection image based on respective distances between first surface points and second surface points, the first surface points being points that are shown from the user's viewpoint from among points constituting a surface of the volume data, the second surface points being points that are shown from a position of virtual light from among the points constituting the surface of the volume data.