Light Field Depth Mapping in Scattering Scenes Using Refocusing Focal Stacks
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Solution Overview
Problem
The light field depth map reconstruction technology is ineffective in scattering scenes due to the absorption and scattering effects of media, limiting its application prospects.
Innovation Solution
A method and apparatus that utilize a 1-norm operator to identify offset pixels corresponding to the sharpest boundaries in a refocusing focal stack, transforming the image into a saturation domain, and converting these pixels into a depth map using light field data parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light field depth map reconstruction technology is applied to scattering scenes, then the depth map can be reconstructed, but the texture feature information cannot be identified due to absorption and scattering effects
Solution Approach 1:
The patent introduces a scattering compensation module that acts as an intermediary to process the scattered light field data before depth map reconstruction. This module estimates and compensates for the scattering effects, recovering the original light field information that would otherwise be lost, thereby enabling both depth reconstruction and texture feature preservation in scattering scenes
Solution Approach 2:
The patent transforms the light field data from spatial domain to frequency domain using Fourier transform, and applies scattering compensation in the frequency domain. By changing the domain of processing and adjusting key parameters like the scattering compensation factor, the method能够有效处理散射场景中的数据并重建深度图
2Ease of manufacture
If traditional light field depth map reconstruction is used, then the process is simple, but it cannot be effectively applied to scattering scenes
Solution Approach 1:
The scattering compensation module serves as an intermediary component that can be integrated into the existing light field depth map reconstruction pipeline. It processes the input light field data and outputs compensated data that maintains compatibility with subsequent reconstruction steps, thus preserving overall system simplicity while enhancing scattering scene effectiveness
Solution Approach 2:
The patent performs scattering compensation as a preliminary action before the main depth map reconstruction process. By pre-processing the light field data to remove scattering effects, the subsequent reconstruction steps can proceed as usual, maintaining simplicity while ensuring reliability in scattering scenes
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective reconstruction of depth maps in scattering scenes, enhancing accuracy and applicability of light field depth map reconstruction.
Implementation Method 1
the absorption and scattering effects of the media on light rays
Implementation Method 2
the absorption and scattering effects of the media on light rays
Data Source
AI summary
The present disclosure relates to the technical field of computer vision and digital image processing, and more particularly to a light field encoded imaging method and apparatus for a scattering scene. The method includes: obtaining scattering light field data, and extracting a refocusing focal stack corresponding to different offset pixels between views from the scattering light field data; transforming an image in the refocusing focal stack into a saturation domain to form a processed focal stack; comparing boundary sharpness degrees of each region in the processed focal stack when refocusing by different offset pixels, and extracting offset pixels corresponding to the sharpest boundary of each region by using a 1-norm operator; and converting the offset pixels into a depth map of a target based on data parameters of the light field.