IEEE International Conference on Computational Photography (ICCP)最新文献

High-rank coded aperture projection for extended depth of field 用于扩展景深的高阶编码孔径投影

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528303

Chenguang Ma, J. Suo, Qionghai Dai, R. Raskar, Gordon Wetzstein

引用次数: 7

Image enhancement in projectors via optical pixel shift and overlay 通过光学像素移位和覆盖的投影仪图像增强

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528304

B. Sajadi, Duy-Quoc Lai, A. Ihler, M. Gopi, A. Majumder

{"title":"Image enhancement in projectors via optical pixel shift and overlay","authors":"B. Sajadi, Duy-Quoc Lai, A. Ihler, M. Gopi, A. Majumder","doi":"10.1109/ICCPhot.2013.6528304","DOIUrl":"https://doi.org/10.1109/ICCPhot.2013.6528304","url":null,"abstract":"Earlier work has explored enhancing the perceived resolution of a display by shifting multiple different low-resolution images by fractions of a pixel and overlaying them in a temporally multiplexed fashion. This increases the manufacturing cost and also sacrifices the temporal resolution that can compromise other capabilities like 3D active stereo. In this paper we propose a method to achieve the same goal in projectors by performing the pixel shift and superposition optically by introducing a simple and inexpensive optical ensemble of a set of lenses on the projector light path. This does not sacrifice the temporal resolution and is extremely easy to implement in practice. However, instead of overlaying different images, we overlay an image with one or more sub-pixel shifted copies of itself. Therefore, we seek a single n×n image which when shifted and overlaid with itself creates a perceptually closer to a higher resolution 2n × 2n target image. This changes the optimization formulation significantly and requires solving a system of sparse linear equations. We take advantage of this sparsity and design a parallel implementation of this optimization in GPUs for real-time computation of the input image critical for its practical implementation. But, since this system is more constrained that using multiple overlaid images, the enhancement of resolution is compromised. However, since the optical design is very simple and inexpensive, it can be deployed on a variety of low-cost projectors and still offer a significant image quality benefit.","PeriodicalId":289563,"journal":{"name":"IEEE International Conference on Computational Photography (ICCP)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130097387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Super-resolution with randomly shaped pixels and sparse regularization 具有随机形状像素和稀疏正则化的超分辨率

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528310

Tomoki Sasao, S. Hiura, Kosuke Sato

引用次数: 11

Triangulation in random refractive distortions 随机折射畸变中的三角剖分

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528314

Marina Alterman, Y. Schechner, Y. Swirski

引用次数: 32

Edge-based blur kernel estimation using patch priors 基于补丁先验的边缘模糊核估计

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528301

Libin Sun, Sunghyun Cho, Jue Wang, James Hays

引用次数: 423

3Deflicker from motion 从运动中闪避

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528294

Y. Swirski, Y. Schechner

{"title":"3Deflicker from motion","authors":"Y. Swirski, Y. Schechner","doi":"10.1109/ICCPhot.2013.6528294","DOIUrl":"https://doi.org/10.1109/ICCPhot.2013.6528294","url":null,"abstract":"Spatio-temporal irradiance variations are created by some structured light setups. They also occur naturally underwater, where they are termed flicker. Underwater, visibility is also affected by water scattering. Methods for overcoming or exploiting flicker or scatter exist, when the imaging geometry is static or quasi-static. This work removes the need for quasi-static scene-object geometry under flickering illumination. A scene is observed from a free moving platform that carries standard frame-rate stereo cameras. The 3D scene structure is illumination invariant. Thus, as a reference for motion estimation, we use projections of stereoscopic range maps, rather than object radiance. Consequently, each object point can be tracked and then filtered in time, yielding deflickered videos. Moreover, since objects are viewed from different distances as the stereo rig moves, scattering effects on the images are modulated. This modulation, the recovered camera poses, 3D structure and de-flickered images yield inversion of scattering and recovery of the water attenuation coefficient. Thus, coupled difficult problems are solved in a single framework. This is demonstrated in underwater field experiments and in a lab.","PeriodicalId":289563,"journal":{"name":"IEEE International Conference on Computational Photography (ICCP)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117201478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Random coded sampling for high-speed HDR video 高速HDR视频的随机编码采样

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528308

Travis Portz, Li Zhang, Hongrui Jiang

引用次数: 18

Post-processing approach for radiometric self-calibration of video 视频辐射自校正的后处理方法

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528307

Matthias Grundmann, C. McClanahan, S. B. Kang, Irfan Essa

{"title":"Post-processing approach for radiometric self-calibration of video","authors":"Matthias Grundmann, C. McClanahan, S. B. Kang, Irfan Essa","doi":"10.1109/ICCPhot.2013.6528307","DOIUrl":"https://doi.org/10.1109/ICCPhot.2013.6528307","url":null,"abstract":"We present a novel data-driven technique for radiometric self-calibration of video from an unknown camera. Our approach self-calibrates radiometric variations in video, and is applied as a post-process; there is no need to access the camera, and in particular it is applicable to internet videos. This technique builds on empirical evidence that in video the camera response function (CRF) should be regarded time variant, as it changes with scene content and exposure, instead of relying on a single camera response function. We show that a time-varying mixture of responses produces better accuracy and consistently reduces the error in mapping intensity to irradiance when compared to a single response model. Furthermore, our mixture model counteracts the effects of possible nonlinear exposure-dependent intensity perturbations and white-balance changes caused by proprietary camera firmware. We further show how radiometrically calibrated video improves the performance of other video analysis algorithms, enabling a video segmentation algorithm to be invariant to exposure and gain variations over the sequence. We validate our data-driven technique on videos from a variety of cameras and demonstrate the generality of our approach by applying it to internet video.","PeriodicalId":289563,"journal":{"name":"IEEE International Conference on Computational Photography (ICCP)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133434173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Multi-modality depth map fusion using primal-dual optimization 基于原始-对偶优化的多模态深度图融合

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528305

David Ferstl, René Ranftl, M. Rüther, H. Bischof

引用次数: 7

Coded focal stack photography 编码焦叠摄影

IEEE International Conference on Computational Photography (ICCP) Pub Date : 2013-04-19 DOI: 10.1109/ICCPhot.2013.6528297

Xing Lin, J. Suo, Gordon Wetzstein, Qionghai Dai, R. Raskar

引用次数: 41