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Updated: Feb 13, 2026
13:44
Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
Published on: August 30, 2013
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Deferred slanted-edge analysis: a unified approach to spatial frequency response measurement on distorted images and
Summary
This study extends the slanted-edge method for spatial frequency response (SFR) measurement to handle images with geometric distortion and directly analyze Bayer-mosaicked images, improving accuracy.
Area of Science:
- Image processing and optical metrology.
- Development of novel algorithms for image quality assessment.
Background:
- The standard slanted-edge method for spatial frequency response (SFR) measurement assumes minimal image distortion.
- Geometric distortions, common in fisheye lenses, and Bayer mosaicking complicate accurate SFR analysis.
Purpose of the Study:
- To adapt the slanted-edge method for accurate SFR measurement in images with significant geometric distortion.
- To enable direct SFR measurement on Bayer-mosaicked images, bypassing demosaicking artifacts.
Main Methods:
- Decoupling edge orientation/position estimation from edge spread function construction.
- Developing a deferred slanted-edge method applicable to distorted and mosaicked images.
Main Results:
- The proposed method successfully measures SFR in images with significant geometric distortion (e.g., fisheye lenses).
- Direct SFR measurement on Bayer-mosaicked images is achieved without demosaicking influence.
- Numerical simulations validate the deferred slanted-edge method's efficacy over existing techniques.
Conclusions:
- The deferred slanted-edge method offers a robust solution for SFR measurement in challenging imaging conditions.
- This advancement improves the accuracy and applicability of image quality assessment for diverse optical systems.
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