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Transparent Shape from Single Polarization Images [article]

Mingqi Shao, Chongkun Xia, Zhendong Yang, Junnan Huang, Xueqian Wang
2022 arXiv   pre-print
This paper presents a data-driven approach for transparent shape from polarization.  ...  Due to the inherent high transmittance, the previous shape from polarization(SfP) methods based on specular reflection model have difficulty in estimating transparent shape, and the lack of datasets for  ...  To address this issue, we propose the first dataset and deep learning model for transparent shape from polarization.  ... 
arXiv:2204.06331v3 fatcat:yqegwmbsjndtxfydbqeqswar7m

Enhanced Boundary Learning for Glass-like Object Segmentation [article]

Hao He, Xiangtai Li, Guangliang Cheng, Jianping Shi, Yunhai Tong, Gaofeng Meng, Véronique Prinet, Lubin Weng
2021 arXiv   pre-print
In particular, we first propose a novel refined differential module that outputs finer boundary cues.  ...  However, this task is very challenging due to the arbitrary scenes behind glass-like objects. This paper aims to solve the glass-like object segmentation problem via enhanced boundary learning.  ...  Deep polarization cues for transparent object [7] Liang-Chieh Chen, George Papandreou, Florian Schroff, and segmentation. In CVPR, 2020. 2 Hartwig Adam.  ... 
arXiv:2103.15734v2 fatcat:icamf6wbzzbx7nwnbc4da3tqdy

Towards urban scenes understanding through polarization cues [article]

Marc Blanchon, Désiré Sidibé, Olivier Morel, Ralph Seulin, Fabrice Meriaudeau
2021 arXiv   pre-print
We demonstrate in this paper that the contribution of polarization measurement increases both the performances of segmentation and the quality of depth estimation.  ...  In addition to the conventional photometric characteristics, we propose to include polarization sensing.  ...  We gratefully acknowledge the support of NVIDIA Corporation with the donation of GPUs used for this research. Conflict of interest The authors declare that they have no conflict of interest.  ... 
arXiv:2106.01717v1 fatcat:253vlpftingezahxmrxwkpq7iy

Page 1225 of Psychological Abstracts Vol. 66, Issue 6 [page]

1981 Psychological Abstracts  
—Constructed an adult visual cliff with a floor of heavy transparent plastic. A pilot study observed whether 238 college students stepped on the shallow side, on the deep side, or in the middle.  ...  (Syracuse U, Inst for Sensory Research) Absolute estimation of line length as a function of orientation and contrast polarity. Sensory Pro- cesses, 197%Sep), Vol 3(3), 261-274.  ... 

Polarization Sensitivity in Amphibians [chapter]

Victor Benno Meyer-Rochow
2014 Polarized Light and Polarization Vision in Animal Sciences  
An ordered array of light-absorbing visual molecules is paramount for PS, but an ordered array of radical pairs generated through photo-induced electron transfer is also essential for magnetoreception,  ...  Polarization sensitivity (PS) in amphibians has been examined in some species of anurans and urodelans.  ...  Hong Yang Yan (Taiwan National Academy of Science) for valuable hints on relevant literature and President James Jin Kyung Kim of Pyongyang University of Science and Technology for his support and for  ... 
doi:10.1007/978-3-642-54718-8_10 fatcat:kwczt5hdmngztjn2iffi2x4jb4

Salient Object Detection: A Survey [article]

Ali Borji, Ming-Ming Cheng, Qibin Hou, Huaizu Jiang, Jia Li
2018 arXiv   pre-print
Detecting and segmenting salient objects in natural scenes, often referred to as salient object detection, has attracted a lot of interest in computer vision.  ...  generation, and saliency for fixation prediction.  ...  The "optimal" closed contour for salient object around the fixation point is then segmented in polar space. Li et al.  ... 
arXiv:1411.5878v5 fatcat:aw7pqd554zdfblokxy2zgp35z4

Salient object detection: A survey

Ali Borji, Ming-Ming Cheng, Qibin Hou, Huaizu Jiang, Jia Li
2019 Computational Visual Media  
Detecting and segmenting salient objects from natural scenes, often referred to as salient object detection, has attracted great interest in computer vision.  ...  We aim to provide a comprehensive review of recent progress in salient object detection and situate this field among other closely related areas such as generic scene segmentation, object proposal generation  ...  The "optimal" closed contour for the salient object around the fixation point is then segmented in polar space. Li et al.  ... 
doi:10.1007/s41095-019-0149-9 fatcat:rwh3mzauinfj7na5ewo6wfp26e

P2D: a self-supervised method for depth estimation from polarimetry [article]

Marc Blanchon, Désiré Sidibé, Olivier Morel, Ralph Seulin, Daniel Braun, Fabrice Meriaudeau
2020 arXiv   pre-print
Therefore, we propose exploiting polarization cues to encourage accurate reconstruction of scenes.  ...  Consequently, robustness to events to which the modality is not sensitive to, like specularity or transparency, is neglected.  ...  We gratefully acknowledge the support of NVIDIA Corporation with the donation of GPUs used for this research.  ... 
arXiv:2007.07567v1 fatcat:3naxom7swfgrdaina4mpvhm5d4

Prioritising guidance cues: Directional migration induced by substratum contours and electrical gradients is controlled by a rho/cdc42 switch

Ann M. Rajnicek, Louise E. Foubister, Colin D. McCaig
2007 Developmental Biology  
Consistent for the cues in isolation, when an EF (150 mV/mm) and NGs were superimposed orthogonally, rac activity was not essential for either contact guidance or electrotaxis.  ...  tested the hypothesis that vectoral migration was controlled by selective activation of rac, cdc42 or rho in response to a 150 mV/mm EF or to a series of parallel substratum nanogrooves (NGs) 130 nm deep  ...  (B) Polar plots of migration for the cells in panel A. Radius is 50 μm/h. The numbers represent the % cells in each segment.  ... 
doi:10.1016/j.ydbio.2007.09.051 pmid:17976566 fatcat:ufa4qkksynhhzi2ehfsxtulmr4

Feature-Driven Ambient Occlusion for Direct Volume Rendering [article]

Alexandre Ancel, Jean-Michel Dischler, Catherine Mongenet
2010 International Workshop on Volume Graphics, Proceedings of the  
This allows us to neglect inter-occlusions between features without losing the auto-occlusions that give cues on the shape of the considered features.  ...  Results show that our approach not only improves the visual quality of images compared to classical ambient occlusion, but it is also less parametersensitive, thus furthermore improving usability for every-day  ...  Phong shading is not always able to restitute the visual cues needed for good data interpretation, especially concerning the relative positions of objects.  ... 
doi:10.2312/vg/vg10/085-092 fatcat:tbvhwaxzvrfvzlcx26zcysuoga

Segmentation and classification of colon glands with deep convolutional neural networks and total variation regularization

Philipp Kainz, Michael Pfeiffer, Martin Urschler
2017 PeerJ  
Here we present our deep neural network-based approach for segmentation and classification of glands in tissue of benign and malignant colorectal cancer, which was developed to participate in the GlaS@  ...  Segmentation of histopathology sections is a necessary preprocessing step for digital pathology.  ...  ACKNOWLEDGEMENTS The authors are grateful to the organizers of the GlaS@MICCAI2015 challenge for providing (i) the Warwick-QU image dataset, and (ii) the MATLAB evaluation scripts for computing performance  ... 
doi:10.7717/peerj.3874 pmid:29018612 pmcid:PMC5629961 fatcat:riresjj6h5hd3hubccao57kgii

Physics vs. Learned Priors: Rethinking Camera and Algorithm Design for Task-Specific Imaging [article]

Tzofi Klinghoffer, Siddharth Somasundaram, Kushagra Tiwary, Ramesh Raskar
2022 arXiv   pre-print
Polarization filters can also be used for measuring shape of objects, using known models of Fresnel reflection [38] , [39] , [59] .  ...  The light transport of specular vs. diffuse light [41] and real vs. virtual images (caused by transparent materials) [42] can be decomposed using polarization filters.  ... 
arXiv:2204.09871v1 fatcat:niqi6uh7rjhd3i5o2wir2ihwty

Part-Based Representations of Visual Shape and Implications for Visual Cognition [chapter]

Manish Singh, Donald D. Hoffman
2001 Advances in Psychology  
shapes, visual search for shapes, the perception of transparency, and the allocation of visual attention to objects.  ...  From Fragments to Objects: Segmentation and Grouping in Vision 2  ...  One source of evidence for object-based attention comes from the attentional-cueing paradigm.  ... 
doi:10.1016/s0166-4115(01)80033-9 fatcat:6s6oiv3scja6pnpzrpatu2k5ra

Deep convolutional networks do not classify based on global object shape

Nicholas Baker, Hongjing Lu, Gennady Erlikhman, Philip J. Kellman, Wolfgang Einhäuser
2018 PLoS Computational Biology  
In biological vision, shape is arguably the most important cue for recognition. We tested the role of shape information in DCNNs trained to recognize objects.  ...  Shape cues appeared to play some role in the classification of artifacts, but little or none for animals.  ...  Most of the top-choice responses seem bizarre for human perceivers, such as "web site" for goose, "oxygen mask" for otter, "can opener" for polar bear, and "chain" for fox.  ... 
doi:10.1371/journal.pcbi.1006613 pmid:30532273 pmcid:PMC6306249 fatcat:gbtatv52vzfxfhpusv5wgtt6oe

Vision: Brain Mechanisms [chapter]

Robert Shapley, Nava Rubin
2002 Encyclopedia of the Human Brain  
MT AND MOTION Two of the strongest stimulus cues for segmentation are motion and color.  ...  Thus, in macaque monkey MT there is evidence that individual neuron activity is determined by segmentation (or combination) of motion signals contingent on cues for transparency.  ... 
doi:10.1016/b0-12-227210-2/00361-7 fatcat:nxy66r2oavhtndbsxpyw42yeya
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