OPTIMIZED SAMPLING FOR VIEW INTERPOLATION IN LIGHT FIELDS WITH OVERLAPPING PATCHES
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1 OPTIMIZED SAMPLING FOR VIEW INTERPOLATION IN LIGHT FIELDS WITH OVERLAPPING PATCHES D. C. Schedl 1 and O. Bimber 1 1 Institute of Computer Graphics, david.schedl@jku.at and oliver.bimber@jku.at
2 MOTIVATION dense (225 samples) uniform sparse (64 samples) [ours] coded sparse (225 from 64 samples) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 2
3 RELATED WORK Coded sampling with local dictionaries [Schedl et al., ICCP 2015] [Schedl et al., CVIU 2017] D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 3
4 RELATED WORK Coded sampling with local dictionaries Compressed Sensing [Marwah et al., TOG 2013] [Cao et al., Opt. Express 2014] D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 4
5 RELATED WORK Coded sampling with local dictionaries Compressed Sensing Depth-based view interpolation Learning-based methods [Kalantari et al., TOG 2016] D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 5
6 RELATED WORK Coded sampling with local dictionaries Compressed Sensing Depth-based view interpolation Learning-based methods Other [Shi et al., TOG 2014] [Vagharshakyan et al., PAMI 2015] D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 6
7 CONTRIBUTIONS New sampling quality metric A reduced search space for sampling mask estimation An enhanced upsampling technique supporting maximal patch overlaps D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 7
8 minimum distance SAMPLING QUALITY METRIC D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 8
9 minimum distance SAMPLING QUALITY METRIC interpolation extrap. D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 9
10 ours SAMPLING QUALITY METRIC interpolation extrap. D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 10
11 SAMPLING QUALITY METRIC D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 11
12 SAMPLING QUALITY METRIC sampling mask D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 12
13 SAMPLING PATTERN ESTIMATION Constraints: regular symmetric sampling mask (64 samples; 15x15 grid) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 13
14 SAMPLING PATTERN ESTIMATION basis grid permutations sampling mask (only guidance) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 14
15 SAMPLING PATTERN ESTIMATION E: basis grid permutations D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 15
16 SAMPLING PATTERN ESTIMATION E: basis grid permutations final sampling mask D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 16
17 RECONSTRUCTION sampling mask dictionary D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 17
18 RECONSTRUCTION sub-sampled light-field sampling mask reconstructed light-field D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 18
19 RECONSTRUCTION sampling mask D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 19
20 RECONSTRUCTION reconstructed light-field D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 20
21 Schedl 15 Schedl 17 Ours RESULTS: SAMPLING MASKS high (bad) low (good) unsupported unsupported unsupported D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 21
22 RESULTS Scenes (N) Marwah '13 Shi '14 Schedl '15 Kalantari '16 Schedl '17 Ours Table Amethyst (64) 37.77dB dB 41.86dB 42.08dB Lego (64) 28.79dB dB 35.63dB 37.26dB Lego (48) dB 35.75dB Cave (64) 26.51dB dB 38.57dB 41.08dB Alley (64) 36.58dB dB 43.83dB 44.35dB Amethyst (72) dB dB 42.55dB Tarot (72) dB dB 39.20dB Amethyst (69) dB dB 42.43dB Tarot (69) dB dB 39.04dB Tarot (48) dB 37.54dB Cave (69) dB dB 41.41dB Alley (69) dB dB 45.20dB D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 22
23 Lego: Schedl 17 (64) Ours (64) Reference (225) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 23
24 Cave: Kalantari 16 (64) Ours (64) Reference (225) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 24
25 Tarot: Schedl 15 (69) Ours (69) Reference (225) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 25
26 Amethyst: Shi '14 (72) Ours (72) Reference (225) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 26
27 Alley: Marwah 13 (64) Ours (64) Reference (225) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 27
28 LIMITATIONS / FUTURE WORK Time: 40h 5 days on NVIDIA Tesla V100 GPU D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 29
29 LIMITATIONS / FUTURE WORK Time: 40h 5 days on NVIDIA Tesla V100 GPU Other light-field camera designs D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 30
30 LIMITATIONS / FUTURE WORK Time: 40h 5 days on NVIDIA Tesla V100 GPU Other light-field camera designs Other fields (e.g. image-based relighting) D. C. Schedl & O. Bimber / Optimized Sampling for View Interpolation in Light Fields with Overlapping Patches 31
31 Schedl 17 (64) Ours (64) Reference (225) Kalantari 16 (64) Ours (64) Reference (225) More information: Contact: and This project was funded by FWF (P N33) JOHANNES KEPLER UNIVERSITY LINZ Altenberger Str Linz, Austria
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