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Project page: http://nma.web.nitech.ac.jp/fukushima/research/depthmap_postfilter.html Poster file of ICME2013. N. Fukushima, T. Inoue, and Y. Ishibashi, "Removing depth map coding distortion by using post filter set," in Proc. IEEE International Conference on Multimedia and Expo (ICME), July 2013.
Citation preview
Min filtered
Max filtered
Input signalKernel
Nearest value outputComparingdifference max
min
3. output
1. Input
2. max/min
#Limitation: Only one edge in a Kernel window
Removing Depth Map Coding Distortion by Using Post Filter Set
Norishige Fukushima*, Tomohiko Inoue, Yutaka IshibashiGraduate School of Engineering, Nagoya Institute of Technology
Introduction and Overview Experimental Results
Proposed Method
Various codec, JPEG, JPEG2000, JPEG-LS, H.264/AVC, can encode depth map and these codecs have coding distortion. Objective of this paper is removing distortions by using post filter set.
Problem and OverviewBackground
Median Filter
R-D curve of various image codecs
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 0
1 1 1 0 0
1 1 0 0 0
Box Filter
Binary Weighted Range Filter (BWRF)
Box Filter
BWRFInput
Profile curve position
Min-max Blur Remove Filter
Binary Weighted Range Filter
3D scene
2cm 8cm
Source view
Virtual views
RAW ImageRAW depth map
RAW ImageCoded/filtered depth map
comparecompare
Experimental Setup
Depth map and image captured from Kinect. Depth maps are coded by various codecs.#Image is not compressed.
[1]K. Lai, L .Bo, X. Ren, and D. Fox, “A large-scale hierarchical multi-view rgb-d object dataset.,” in Proc. ICRA, pp. 1817–1824, May 2011.[2] K.-J. Oh, A. Vetro, and Y.-S. Ho, “Depth coding using a boundary reconstruction filter for 3-d video systems,” IEEE Trans. CSVT, vol. 21, no. 3, pp. 350 –359, Mar. 2011.
TransmissionEncode Decode Post
filteringView
synthesisDepth Map
Image
MedianFilter
Min-MaxBlur Remove
Filter
Weighted Range Filter
Over quantizationis recovered
Boundary bluris removed
Spike noiseis removed
GaussianFilter
Gaussian noiseis removed
Project site/Source code: http://nma.web.nitech.ac.jp/fukushima/research/depthmap_postfilter.html
Reference
Computational Time 15 ms
Intel Core i7 2.93GHz (4core HT)Parallelization: SSE4, Intel TBBLanguage:C++
IEEE International Conference on Multimedia & Expo (ICME), July 2013