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Filtering and processing of panoramic images obtained using a camera and a wide-angle-imaging reflective surface
1Center for Visual Sciences, Research School of Biological Sciences, Australian National University, Australian Capital Territory 2601, USA. javaan.chahl@anu.edu.au
Summary
This study introduces a novel, fast filtering technique for panoramic images captured with wide-angle reflective surfaces. The method corrects for spatial distortions, enabling homogeneous image processing across all viewing directions.
Area of Science:
- Computer Vision
- Image Processing
- Optics
Background:
- Wide-angle imaging using curved reflective surfaces is gaining traction.
- Acquired panoramic images require specialized filtering due to inherent spatial distortions.
Purpose of the Study:
- To develop a technique for homogeneous and fast filtering of panoramic images.
- To address spatial distortions introduced by wide-angle imaging systems.
Main Methods:
- Digitally unwarping images into Cartesian coordinates (azimuth and elevation).
- Establishing mappings of image patches to the viewsphere.
- Determining local mappings of great circles along principal axes for 2-D convolution.
- Utilizing quasi-separable convolution for computational efficiency.
Main Results:
- A method for homogeneous filtering of distorted panoramic images is presented.
- The technique ensures consistent filtering across all viewing directions.
- Increased computational speed and efficiency are achieved through quasi-separable filtering.
Conclusions:
- The developed technique effectively handles spatial distortions in panoramic imaging.
- This approach enables efficient and homogeneous filtering for wide-angle reflective imaging systems.