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Grid-Based Retargeting with Transformation Consistency Smoothing [chapter]

Bing Li, Ling-Yu Duan, Jinqiao Wang, Jie Chen, Rongrong Ji, Wen Gao
2011 Lecture Notes in Computer Science  
In addition, taking into account the data noise in importance maps, we also propose a grid-based retargeting model, which is robust and effective to data noise in real time retargeting function learning  ...  Finally, using different mapping functions, our framework is generalized for explaining previous works, such as seam carving [9,13] and mesh based methods [3, 18] .  ...  We further propose a grid-based retargeting model to ensures transformation consistency in model learning. This grid-based model is optimized by solving a nonlinear programming problem.  ... 
doi:10.1007/978-3-642-17829-0_2 fatcat:inbxenrttfefdjgkdb2pcis4yi

Context-Aware Video Retargeting via Graph Model

Zhan Qu, Jinqiao Wang, Min Xu, Hanqing Lu
2013 IEEE transactions on multimedia  
First, we employ a grid-based warping framework to preserve the spatial structure and temporal motion trend at the unit of grid cell.  ...  Existing retargeting techniques deal with these spatial-temporal requirements individually, which preserve the spatial geometry and temporal coherence for each region.  ...  Lang for providing the retargeted video clips for comparison.  ... 
doi:10.1109/tmm.2013.2267727 fatcat:xopemzkobrawvlu6vm7dippdmm

SmartGrid: Video Retargeting with Spatiotemporal Grid Optimization

Ho Sub Lee, Gyujin Bae, Sung In Cho, Young Hwan Kim, Seokhyeong Kang
2019 IEEE Access  
However, these methods do not explicitly adjust the sizes of the grids corresponding to the salient objects and the static background regions.  ...  The basic idea of SmartGrid is to maintain the consistency of the contents in consecutive frames by analyzing the degree of the spatiotemporal consistency.  ...  transforms the RGB image to a complex number with four components (quaternion), and then transforms them to frequency space by using the quaternion Fourier Transform.  ... 
doi:10.1109/access.2019.2938865 fatcat:utai7qlwifhu5khvp6u66st72i

Robust Image Retargeting via Axis-Aligned Deformation

Daniele Panozzo, Ofir Weber, Olga Sorkine
2012 Computer graphics forum (Print)  
, smooth and robust retargeting results.  ...  We propose the space of axis-aligned deformations as the meaningful space for content-aware image retargeting.  ...  This work focuses on continuous (warp-based) retargeting, which readily allows controlling the smoothness of the retargeting operator.  ... 
doi:10.1111/j.1467-8659.2012.03001.x fatcat:gthlrw732vf6jnrwdvviy4nbhi

Depth Trajectory-Aware Stereoscopic Video Retargeting

Xuejin Wang, Pengfei Li, Feng Shao
2021 IEEE Access  
Compared with traditional image/video retargeting, stereoscopic video retargeting poses new challenges that should preserve shape and depth of salient objects with temporal coherence.  ...  As a result, our solution can preserve shape, depth and temporal fidelity of salient objects simultaneously with comfortable visual experience.  ...  Since we design a spatial depth distortion energy to enforce disparity consistency with the target images by maintaining the widths of matched grids, as shown in Fig. 9 , compared with US method that  ... 
doi:10.1109/access.2021.3059477 fatcat:42yhkpcgyvhlpjoyi622z65p2u

Consumer video retargeting

Liang Shi, Jinqiao Wang, Lingyu Duan, Hanqing Lu
2009 Proceedings of the seventeen ACM international conference on Multimedia - MM '09  
In this paper, we present a context assisted spatialtemporal grid scheme for consumer video retargeting.  ...  Then, a semantic importance map is built up representing the spatial importance and temporal continuity, which is incorporated with a 3D rectilinear grid scaleplate to map frames to the target display,  ...  Combined with Temporal Consistency Map, we developed a 3D spatial-temporal grid framework for non-homogeneous and smooth video retargeting, which is optimized by incorporating both spatial deformation  ... 
doi:10.1145/1631272.1631315 dblp:conf/mm/ShiWDL09 fatcat:ktbcscbvabhtvevdwgbrayktk4

Image retargeting with protection of object arrangement

Kazu Mishiba, Takeshi Yoshitome
2014 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
Our proposed retargeting method is based on a warping method which finds an optimal transformation by solving an energy minimization problem.  ...  To achieve protection of object arrangement, we introduce an energy that enforces all the objects and the relative positions among these objects to be transformed by the same transformation in the retargeting  ...  To achieve smooth transformation, the transformation of a face should be as similar as possible to the transformation of its adjacent faces.  ... 
doi:10.1109/icassp.2014.6854718 dblp:conf/icassp/MishibaY14 fatcat:wmmrmum5sbfbdkjs2day3ettjq

Motion-aware temporal coherence for video resizing

Yu-Shuen Wang, Hongbo Fu, Olga Sorkine, Tong-Yee Lee, Hans-Peter Seidel
2009 ACM Transactions on Graphics  
We achieve spatially and temporally coherent resizing of the aligned frames by preserving the relative positions of corresponding components within a grid-based optimization framework.  ...  The final resized video is reconstructed by transforming every video frame back to the original coordinate system. Abstract Temporal coherence is crucial in content-aware video retargeting.  ...  The cropping-based retargeting methods achieve temporally coherent results by searching for a smooth cropping sequence.  ... 
doi:10.1145/1618452.1618473 fatcat:fnnyhgny5jalnhlb33t3j43lwe

Image Retargeting with Protection of Object Arrangement

Kazu MISHIBA, Takeshi YOSHITOME
2014 IEICE transactions on information and systems  
Our proposed retargeting method is based on a warping method which finds an optimal transformation by solving an energy minimization problem.  ...  To achieve protection of object arrangement, we introduce an energy that enforces all the objects and the relative positions among these objects to be transformed by the same transformation in the retargeting  ...  To achieve smooth transformation, the transformation of a face should be as similar as possible to the transformation of its adjacent faces.  ... 
doi:10.1587/transinf.e97.d.1583 fatcat:clgd7i4bdrg2dm4afgovjiqqgy

Motion-aware temporal coherence for video resizing

Yu-Shuen Wang, Hongbo Fu, Olga Sorkine, Tong-Yee Lee, Hans-Peter Seidel
2009 ACM SIGGRAPH Asia 2009 papers on - SIGGRAPH Asia '09  
We achieve spatially and temporally coherent resizing of the aligned frames by preserving the relative positions of corresponding components within a grid-based optimization framework.  ...  The final resized video is reconstructed by transforming every video frame back to the original coordinate system. Abstract Temporal coherence is crucial in content-aware video retargeting.  ...  The cropping-based retargeting methods achieve temporally coherent results by searching for a smooth cropping sequence.  ... 
doi:10.1145/1661412.1618473 fatcat:wrqqt7cgd5bs5juc7rxcrv3n4a

Auto-directed video stabilization with robust L1 optimal camera paths

Matthias Grundmann, Vivek Kwatra, Irfan Essa
2011 CVPR 2011  
We incorporate additional constraints on the path of the camera directly in our algorithm, allowing for stabilized and retargeted videos.  ...  To this end, our algorithm is based on a linear programming framework to minimize the first, second, and third derivatives of the resulting camera path.  ...  However, we use the grid-based approach for all our results, as it is approximately 40% faster.  ... 
doi:10.1109/cvpr.2011.5995525 dblp:conf/cvpr/GrundmannKE11 fatcat:x3gjbjzt7rga5oy3bbqkvrd3le

Object-Coherence Warping for Stereoscopic Image Retargeting

Shih-Syun Lin, Chao-Hung Lin, Shu-Huai Chang, Tong-Yee Lee
2014 IEEE transactions on circuits and systems for video technology (Print)  
The key to this topic is consistently adapting a stereoscopic image to fit displays with various aspect ratios and sizes while preserving visually salient content.  ...  This strategy enables our method to consistently preserve both the disparities and shapes of visually salient objects, leading to good content-aware retargeting.  ...  With the aid of the object-based significance map, the grids occupied by an object have the same significance value.  ... 
doi:10.1109/tcsvt.2013.2291282 fatcat:jtmhyfvcwzeifnbyef6tquiqle

Patch-Based Image Warping for Content-Aware Retargeting

Shih-Syun Lin, I-Cheng Yeh, Chao-Hung Lin, Tong-Yee Lee
2013 IEEE transactions on multimedia  
In this paper, a patch-based retargeting scheme with an extended significance measurement is introduced to preserve shapes of both visually salient objects and structure lines while minimizing visual distortions  ...  Image retargeting is the process of adapting images to fit displays with various aspect ratios and sizes.  ...  With the aid of patch-based significance map and warping technique, the proposed approach can consistently preserve visually salient content ( Fig. 1(b) ).  ... 
doi:10.1109/tmm.2012.2228475 fatcat:a3aaqvtgrfdudhj6ur4nzwqbmi

Motion-based video retargeting with optimized crop-and-warp

Yu-Shuen Wang, Hui-Chih Lin, Olga Sorkine, Tong-Yee Lee
2010 ACM Transactions on Graphics  
Our method compares favorably with state-of-the-art retargeting systems, as demonstrated in the examples and widely supported by the conducted user study.  ...  Variational optimization allows to find the best balance between the two operations, enabling retargeting of challenging videos with complex motions, numerous prominent objects and arbitrary depth variability  ...  We are grateful to Alexander Hornung and Manuel Lang for insightful discussions and for helping us with the comparisons.  ... 
doi:10.1145/1778765.1778827 fatcat:odpodezm5vey5i2wl5oe6oxzei

Motion-based video retargeting with optimized crop-and-warp

Yu-Shuen Wang, Hui-Chih Lin, Olga Sorkine, Tong-Yee Lee
2010 ACM Transactions on Graphics  
Our method compares favorably with state-of-the-art retargeting systems, as demonstrated in the examples and widely supported by the conducted user study.  ...  Variational optimization allows to find the best balance between the two operations, enabling retargeting of challenging videos with complex motions, numerous prominent objects and arbitrary depth variability  ...  We are grateful to Alexander Hornung and Manuel Lang for insightful discussions and for helping us with the comparisons.  ... 
doi:10.1145/1833351.1778827 fatcat:zrga2zd6ebbibb6ajhcdvy5gye
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