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Category‐Specific Salient View Selection via Deep Convolutional Neural Networks
Author(s) -
Kim Seongheum,
Tai YuWing,
Lee JoonYoung,
Park Jaesik,
Kweon In So
Publication year - 2017
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/cgf.13082
Subject(s) - salient , computer science , artificial intelligence , convolutional neural network , orientation (vector space) , pattern recognition (psychology) , projection (relational algebra) , thumbnail , computer vision , feature (linguistics) , image (mathematics) , mathematics , philosophy , geometry , algorithm , linguistics
Abstract In this paper, we present a new framework to determine up front orientations and detect salient views of 3D models. The salient viewpoint to human preferences is the most informative projection with correct upright orientation. Our method utilizes two Convolutional Neural Network (CNN) architectures to encode category‐specific information learnt from a large number of 3D shapes and 2D images on the web. Using the first CNN model with 3D voxel data, we generate a CNN shape feature to decide natural upright orientation of 3D objects. Once a 3D model is upright‐aligned, the front projection and salient views are scored by category recognition using the second CNN model. The second CNN is trained over popular photo collections from internet users. In order to model comfortable viewing angles of 3D models, a category‐dependent prior is also learnt from the users. Our approach effectively combines category‐specific scores and classical evaluations to produce a data‐driven viewpoint saliency map. The best viewpoints from the method are quantitatively and qualitatively validated with more than 100 objects from 20 categories. Our thumbnail images of 3D models are the most favoured among those from different approaches.