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| Content Provider | IET Digital Library |
|---|---|
| Author | Jiang, Wei Yi, Dingrong Kong, Linghua |
| Abstract | There exists few reports in the literature aimed at estimating depth from the spectrally-varying-amount-of-defocus contained in a single image generally captured by a commercial colour camera. However, the colour camera can adversely affect the depth measurement accuracy, due to the cross-talk between its wide and overlapping red/green/blue channels. In this study, the authors propose an improved method to estimate depth from non-overlapping and narrow-band spectral images captured by a snapshot narrow-band multispectral imaging (SNB-MSI) sensor. An optical lens with visible longitudinal chromatic aberration is placed in front of the SNB-MSI sensor to enlarge the spectrally-varying-focal-depth so that spectral images corresponding to different narrow bands are focused on apparently different planes. This setting not only differentiates depth ambiguity on both sides of the focal plane, that is caused by two different depths lead to the same blurred image, but also prevents cross talks between different spectral channels. Preliminary experimental data show that the central wavelength of best focused spectral band shifts with increasing depth of the target. This suggests that it is feasible to dynamically measure the depth of the scene using the combination of a longitudinal chromatic aberration optical lens with a SNB-MSI sensor. |
| Starting Page | 8591 |
| Ending Page | 8594 |
| Page Count | 4 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 23, Dec (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/23 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.9062 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2019-03-25 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
| Subject Keyword | Aberrations Apparently Different Planes Blurred Image Camera Commercial Colour Camera Computer Vision And Image Processing Technique Cross Talks Cross-talk Depth Ambiguity Depth Measurement Accuracy Different Narrow Band Different Spectral Channel Estimating Depth Focal Plane Focused Spectral Band Shift Image Colour Analysis Image Resolution Image Restoration Image Sonsor Increasing Depth Infrared Imaging Lenses Longitudinal Chromatic Aberration Optical Lens Narrow-band Spectral Image Optical Coatings And Filter Optical Filter Optical Image Optical Lenses And Mirrors Optical, Image And Video Signal Processing Single Image Snapshot Multispectral Imaging Sensor Snapshot Narrow Band Multispectral Imaging Sensor Snapshot Narrow-band MSI Sensor SNM-MSI Sensor Spectrally-varying Depth Spectrally-varying-amount-of-defocus Spectrally-varying-focal-depth Visible Longitudinal Chromatic Aberration |
| Content Type | Text |
| Resource Type | Article |
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