Holographic Camera Depth Measurement via Interference Pattern Analysis
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Solution Overview
Problem
Current technologies lack an effective method for measuring the depth of a stereoscopic image, particularly in three-dimensional spaces where multiple depths are present.
Innovation Solution
A system comprising a display device, a holographic camera, and a control unit that calculates the depth of field by generating an interference pattern image, modulating image data based on light wavelength and phase, and determining edge detection values to create a modulated signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a holographic camera is used to record stereoscopic images with amplitude and phase information, then measurement precision of depth is improved, but device complexity increases
Solution Approach 1:
The patent introduces a control unit as an intermediary component that processes the complex interference pattern data captured by the holographic camera. This control unit performs Fourier transform and depth calculation operations, acting as a mediator between the holographic camera's raw data output and the final depth measurement result, thereby managing the complexity while maintaining high measurement precision
Solution Approach 2:
The patent replaces traditional mechanical depth measurement methods with optical interference-based holographic recording. Instead of using physical measurement instruments, the system uses the interference of light waves to encode depth information, substituting mechanical measurement systems with optical field-based measurement that achieves higher precision
2Measurement precision
If interference pattern image processing is performed to calculate depth, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing the relationship between interference patterns and depth information through Fourier transform operations. The control unit is pre-programmed with the algorithms needed to process interference patterns, so when actual depth measurement is needed, the processing can be executed efficiently without requiring complex real-time calculations
Solution Approach 2:
The patent employs periodic action through the use of Fourier transform, which decomposes the complex interference pattern into periodic frequency components. This allows the depth information to be extracted through systematic analysis of these periodic components, making the processing more efficient and manageable
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 accurate calculation of the depth of field for objects displayed in stereoscopic images, allowing for precise measurement and representation of depth in three-dimensional spaces.
Implementation Method 1
the holographic camera generates an interference pattern image by sensing a wavelength and a phase of light of the stereoscopic image
Data Source
AI summary
A system for measuring a depth of a stereoscopic image includes a display device displaying a stereoscopic image at a predetermined depth of field; a holographic camera generating an interference pattern image by sensing a wavelength and a phase of light of the stereoscopic image; and a control unit calculating a plurality of modulated image data having image information of the stereoscopic image at each depth of the plurality of depths based on the wavelength and the phase of the light, calculating edges of a field in each of the plurality of modulated image data to obtain edge detection values, calculating a modulated signal by arranging the edge detection values according to a depth in the each of the plurality of modulated image data, calculating a first maximum value of the modulated signal, and calculating a first depth corresponding to the first maximum value as the depth of field.