Parallax Detection Using Point Spread Function Approximation
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Solution Overview
Problem
Stereo distance measurement using cameras with low pixel lens resolution results in significant parallax detection errors due to differences in aberration distributions between cameras.
Innovation Solution
A parallax detecting apparatus that modifies images to approximate the point spread functions of different optical systems, reducing aberration distribution differences and enhancing distance measurement accuracy by calculating parallax using modified images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cameras with low pixel lens resolution are used, then device cost and height are reduced, but parallax detection error increases significantly
Solution Approach 1:
The patent applies parameter changes by modifying the point spread function parameters of at least one camera to match a reference point spread function. This is achieved by calculating modification data that adjusts the optical characteristics of cameras with low-resolution lenses, thereby resolving the contradiction between using cost-effective low-resolution cameras and maintaining accurate parallax detection by standardizing their optical parameters.
2Length of stationary object
If cameras with low pixel lens resolution are used, then device height is reduced, but parallax detection error increases significantly
Solution Approach 1:
The patent applies parameter changes by modifying the point spread function parameters of at least one camera to match a reference point spread function. This is achieved by calculating modification data that adjusts the optical characteristics of cameras with low-resolution lenses, thereby resolving the contradiction between using compact low-resolution cameras and maintaining accurate parallax detection by standardizing their optical parameters.
3Device complexity
If point spread functions of different optical systems are not approximated, then processing complexity is reduced, but parallax detection accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating modification data that approximates the point spread function of at least one camera to match a reference point spread function before parallax detection. This preprocessing step ensures that subsequent parallax calculations are performed on standardized images, improving accuracy without significantly increasing overall system complexity.
Data Source
AI summary
The present invention aims to provide a parallax detecting apparatus (3) and the like which is capable of suppressing the degree of parallax detection error even in the case of using cameras each having a lens whose resolution is low for the pitch of the pixels of the imaging devices. The parallax detecting apparatus (3) which calculates a parallax that occurs between optical systems includes: a PSF approximating unit (5) configured to modify at least one of images obtained from the respective optical systems such that point spread functions of the optical systems are made to sufficiently approximate a point spread function of a predetermined optical system; and a parallax calculating unit (9) configured to calculate the parallax that occurs between the optical systems, using the image modified by the PSF approximating unit (5).