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Depth tolerance of simple interpolation methods for 3D camera used for natural 3D display 深度公差的简单插值方法用于三维相机的自然三维显示
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.530124
H. Yoshikawa, Y. Takaki
{"title":"Depth tolerance of simple interpolation methods for 3D camera used for natural 3D display","authors":"H. Yoshikawa, Y. Takaki","doi":"10.1117/12.530124","DOIUrl":"https://doi.org/10.1117/12.530124","url":null,"abstract":"Natural 3D images can be generated by displaying high-density directional images. In order to display real 3D scenes, a 3D camera technique which generates high-density directional images of real 3D scenes is required. The most promising method is to generate them by using an interpolation algorithm from multiple images captured by horizontally aligned multiple cameras. In this study we examined four different simple interpolation algorithms. The algorithm that utilizes one representative object distance as a priori was found to be the most effective one. This technique offers the fast interpolation. However, there is a tradeoff between the number of cameras and the depth of 3D objects. The allowable depth for 3D objects is reported.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125740886","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: 3
Interactive view synthesis from integral photography using estimated depth information 使用估计深度信息的积分摄影的交互式视图合成
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.511022
S. Mitsuda, Tomoyuki Yamamoto, Keita Takahashi, T. Naemura, H. Harashima
{"title":"Interactive view synthesis from integral photography using estimated depth information","authors":"S. Mitsuda, Tomoyuki Yamamoto, Keita Takahashi, T. Naemura, H. Harashima","doi":"10.1117/12.511022","DOIUrl":"https://doi.org/10.1117/12.511022","url":null,"abstract":"In the field of 3-D imaging technology, Integral Photography (IP) is one of the promising approaches, and a combination of an HDTV camera and an optical fiber array has been investigated to display 3-D live video sequences. The authors have applied this system to a computer graphics method for synthesizing arbitrary views from IP images: a method of interactively displaying free-viewpoint images without physical lens array. This paper proposes a real-time method of estimating depth data corresponding to each element image on an IP image. Experimental results show that the proposed method is very useful for improving the quality of the free-viewpoint image synthesis.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125626731","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: 5
Stereoscopic video telephony: naturalness and sense of presence 立体视频电话:自然和存在感
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.510787
W. J. Tam, R. Renaud, A. Vincent, Taali Martin, P. Blanchfield
{"title":"Stereoscopic video telephony: naturalness and sense of presence","authors":"W. J. Tam, R. Renaud, A. Vincent, Taali Martin, P. Blanchfield","doi":"10.1117/12.510787","DOIUrl":"https://doi.org/10.1117/12.510787","url":null,"abstract":"Previous research from our laboratory indicated that sense of presence is enhanced for stereoscopic images with scenes typical of video telephone (VT) systems, compared to non-stereoscopic 2-D images. However, this enhancement was not found for all sequences. In the present study we report results obtained with a new set of stereoscopic sequences containing depth scenes that were created through manipulation of camera focal length, background scene, and camera convergence point. Viewers were asked to rate both stereoscopic and non-stereoscopic versions of the sequences on naturalness and sense of presence. The methodology of double-stimulus, continuous quality scale (ITU-R Recommendation 500) was used in the subjective assessment. Images in the video sequences were common image format (CIF, 352 x 240 pixels) with a display size of 15.5 cm x 11.6 cm. The results confirmed our previous findings that sense of presence is enhanced for certain stereoscopic video sequences, compared to non-stereoscopic sequences. The results also indicate a high correlation between ratings of naturalness and sense of presence (r2 = 0.75), although ratings tended to be lower for naturalness than for presence. Both ratings tended to improve slightly with camera focal length, except for sequences with a natural background. For the range studied, no effect of camera convergence point was found.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123308040","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: 2
Combined nonuniform quantization and lossless coding of digital holograms of three-dimensional objects 三维物体数字全息图的非均匀量化与无损编码相结合
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.511645
A. Shortt, T. Naughton, B. Javidi
{"title":"Combined nonuniform quantization and lossless coding of digital holograms of three-dimensional objects","authors":"A. Shortt, T. Naughton, B. Javidi","doi":"10.1117/12.511645","DOIUrl":"https://doi.org/10.1117/12.511645","url":null,"abstract":"Digital holograms are capable of encoding three-dimensional (3D) information of a scene or object. Uniform quantization has been used in the past to compress digital holograms with some success. We have developed nonuniform quantization techniques that operate on the complex-valued hologram data for increased performance. Our digital holograms of 3D objects are captured using phase-shift digital interferometry. The quantized holographic pixels are coded using lossless techniques to achieve compression rates in excess of 40.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124707843","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: 2
Acquisition and display systems of FTV (free-viewpoint television) 自由视点电视采集与显示系统
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.510812
T. Fujii, M. Tanimoto
{"title":"Acquisition and display systems of FTV (free-viewpoint television)","authors":"T. Fujii, M. Tanimoto","doi":"10.1117/12.510812","DOIUrl":"https://doi.org/10.1117/12.510812","url":null,"abstract":"Free-viewpoint TeleVision (FTV) is a next generation television where users can move their viewpoints freely. In the previous paper, we reported an FTV system based on the Ray-Space representation. In this paper, we focus on acquisition and display system for the FTV. As an acquisition system, we investigated two configurations: (1) multiple cameras with interpolation, and (2) a single high-speed camera with optical scanning system. As a display system, we developed a display with head tracking, where the position of a user is detected by image processing.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132786705","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: 8
High-beamforming power-code-multiplexed optical scanner for three-dimensional displays 用于三维显示器的高波束形成功率码复用光学扫描仪
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.508160
M. Arain, N. Riza
{"title":"High-beamforming power-code-multiplexed optical scanner for three-dimensional displays","authors":"M. Arain, N. Riza","doi":"10.1117/12.508160","DOIUrl":"https://doi.org/10.1117/12.508160","url":null,"abstract":"Three dimensional (3-D) displays play an important role in the field of entertainment. Today, research is being conducted to produce 3-D displays to meet the complex needs of high-functionality full motion 3D displays at reasonable cost, but without glasses, complicated viewing arrangements or restricted fields of view. Other applications for 3-D displays include but are not limited to CAD/Design simulation, advanced data representation, displaying complex 3-D information for automotive design, medical imaging, advanced navigation displays, scientific visualization, and advertising. The key element in all these applications is an optical beam scanner that can display 3-D images for large viewing angles. Our proposed Code Multiplexed Optical Scanner (C-MOS) can fulfill all these requirements with its high beamforming power capabilities. Our proposed experiment demonstrates three dimensional (3-D) beam scanning with large angles (e.g., > 160°), large centimeter size aperture, and scanning speed of <300 μsec. The robust construction and simple operation of the C-MOS makes it very useful and attractive for deployment in the field of entertainment, defense and medical imaging. Here we report the application of the C-MOS for three dimensional (3-D) displays.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134039094","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: 2
Three-dimensional object feature extraction and classification using computational holographic imaging 基于计算全息成像的三维目标特征提取与分类
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.511205
Sekwon Yeom, B. Javidi
{"title":"Three-dimensional object feature extraction and classification using computational holographic imaging","authors":"Sekwon Yeom, B. Javidi","doi":"10.1117/12.511205","DOIUrl":"https://doi.org/10.1117/12.511205","url":null,"abstract":"This paper deals with 3D object classification using computational holographic imaging. A 3D object can be reconstructed at different planes using a single hologram. We apply Principal Component Analysis (PCA) and Fisher Linear Discriminant (FLD) analysis based on Gabor-wavelet feature vectors to classify 3D objects measured by digital interferometry. Experimental and simulation results are presented for regional filtering concentrated at specific positions, and for overall grid filtering. The proposed technique substantially reduces the dimensionality of the 3D classification problem.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132920212","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: 0
Arbitrary viewpoint 3D display system 任意视点三维显示系统
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.512484
Hideya Takahashi, Kenji Yamada, E. Shimizu
{"title":"Arbitrary viewpoint 3D display system","authors":"Hideya Takahashi, Kenji Yamada, E. Shimizu","doi":"10.1117/12.512484","DOIUrl":"https://doi.org/10.1117/12.512484","url":null,"abstract":"This paper describes an arbitrary viewpoint 3D display system that is a new concep of a 3D display. This system consists of a multivie camera system for 3D data capturing and a real-time color autostereoscopic display system to show an arbitrary viewpoint 3D image. This 3D display system is based on the reconstruction of parallax rays, and it is one of real-time integral imaging systems. To reconstruct a 3D image, the ray-space method is used. By using similarities between the reference plane in the ray-space representation and the screen of the 3D display system, the ray data to display a real 3D object can be obtained with multiview images. Moreover, an arbitrary ray data can be synthesized from captured multiview images. Therefore, an arbitrary viewpoint 3D image can be reconstructed by the 3D display system. This paper describes the principle of an arbitrary viewpoint 3D display system, and also describes the experimental results.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"40 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120853155","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: 4
Web-based real-time multiview 3D display system 基于web的实时多视图三维显示系统
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.511607
Young-Gyoo Park, Kyung-Hoon Bae, Sang-Tae Lee, Eun-Soo Kim
{"title":"Web-based real-time multiview 3D display system","authors":"Young-Gyoo Park, Kyung-Hoon Bae, Sang-Tae Lee, Eun-Soo Kim","doi":"10.1117/12.511607","DOIUrl":"https://doi.org/10.1117/12.511607","url":null,"abstract":"In this paper, a new web-based multi-view 3D display system through the intermediate views synthesis using an adaptive disparity estimation algorithm is proposed and its performance is analyzed by comparison to those of the conventional disparity estimation algorithms. First, the feature value indicating the local image complexity is extracted from the input stereo sequences by using the edge detection and disparity estimation. Then, the matching window size for disparity estimation is adaptively selected depending on the magnitude of this feature value. This new approach is not only able to reduce the disparity vector mismatch encountered in the conventional dense disparity estimation with small matching window size, but is also able to reduce the blocking effect associated with the disparity estimation using a large matching window size. With some experimental results on a sequence of stereo image captured by the web-cameras, it is found that the adaptive algorithm improves PSNRs on the average in comparison with those of the conventional algorithms and multi-view images can be generated through the process of real-time IVS. Finally it is suggested that this approach can be applied to the web-based real-time 3D video communication system.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127174529","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: 0
Extended Hough methodology for 3D feature detection 三维特征检测的扩展霍夫方法
SPIE ITCom Pub Date : 2003-11-18 DOI: 10.1117/12.511256
R. Cofer, S. Kozaitis, J. Cha
{"title":"Extended Hough methodology for 3D feature detection","authors":"R. Cofer, S. Kozaitis, J. Cha","doi":"10.1117/12.511256","DOIUrl":"https://doi.org/10.1117/12.511256","url":null,"abstract":"In an effort to make automatically detect image features for pattern recognition, we described a 3-dimesional (3-D) Hough transform. We describe two interlocking theoretical extensions to greatly enhance the Hough transform's ability to handle finite lineal features and allow directed search for various features while balancing memory and computational complexity. We computed the 2-D Hough transform of 1-D slices of an image which results in a 2-D to 3-D transform. Features such as line segments will cluster in a particular location so that both line orientation and spatial extent can be determined. This approach allows the Hough transform to be more widely applied in pattern recognition including 3-D features.","PeriodicalId":282161,"journal":{"name":"SPIE ITCom","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134258833","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: 1
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