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International Workshop on Projector-Camera Systems最新文献

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Real world dynamic appearance enhancement with procam feedback 真实世界动态外观增强与程序反馈
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394629
Toshiyuki Amano, H. Kato
{"title":"Real world dynamic appearance enhancement with procam feedback","authors":"Toshiyuki Amano, H. Kato","doi":"10.1145/1394622.1394629","DOIUrl":"https://doi.org/10.1145/1394622.1394629","url":null,"abstract":"In this paper, a dynamic appearance enhancement method for the less saturated object is proposed. The appearance enhancement method proposed in this paper is realized with a projector camera dynamic feed back system. Therefore, the proposed method has an ability of the rapid and continuous appearance enhancement and it is useful for the human visual perception assistance. Also, the system not requires a pre-captured appearance of the target.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125110669","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
A geometric correction method for projected images using SIFT feature points 基于SIFT特征点的投影图像几何校正方法
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394628
Toru Takahashi, Norihito Numa, T. Aoki, S. Kondo
{"title":"A geometric correction method for projected images using SIFT feature points","authors":"Toru Takahashi, Norihito Numa, T. Aoki, S. Kondo","doi":"10.1145/1394622.1394628","DOIUrl":"https://doi.org/10.1145/1394622.1394628","url":null,"abstract":"This paper proposes a geometric correction method for projected images using SIFT feature points. A projected image correction method based on projector-camera system needs to obtain the correspondence between projector and camera images, which is obtained by projecting the special patterns on a screen. The special patterns must be re-projected when changing the environment, e.g., the projector or screen is moved. On the other hand, this paper proposes a geometric correction method using SIFT feature points on a projected image which does not employ any special patterns to obtain the correspondence between projector and camera images. Experimental result shows that the use of our proposed method makes it possible to correct distortion of projected images with only one snapshot.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123908173","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: 10
Software-based distortion compensation for a scanned beam display 基于软件的扫描波束显示失真补偿
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394640
M. Liao, Zhengyou Zhang, John R. Lewis
{"title":"Software-based distortion compensation for a scanned beam display","authors":"M. Liao, Zhengyou Zhang, John R. Lewis","doi":"10.1145/1394622.1394640","DOIUrl":"https://doi.org/10.1145/1394622.1394640","url":null,"abstract":"We developed a software-based approach to compensate for distortion in a scanned beam display (SBD) system. A scanned beam display has advantages of being small in device size, low in energy consumption, and capable of producing high-resolution and variable images. However, it suffers from two main problems: the non-uniform power spreading within a single light spot and the non-uniform light spot distribution in trajectory. While most work has been done to solve these problems from the hardware design perspective, we address these issues by minimizing the difference between input and output images on a software level. We also implemented our algorithm on Graphics Processing Unit (GPU) to achieve near real-time performance which is required by video display. Finally, the output light source control value is applied to a scanned beam display simulator, showing improved display images.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128669552","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
Free form projection display and application 自由形式投影显示和应用
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394633
Daisuke Kondo, Y. Shiwaku, R. Kijima
{"title":"Free form projection display and application","authors":"Daisuke Kondo, Y. Shiwaku, R. Kijima","doi":"10.1145/1394622.1394633","DOIUrl":"https://doi.org/10.1145/1394622.1394633","url":null,"abstract":"Free Form Projection Display is a novel display technology to superimpose a virtual object onto real object by image projection. The method is based on the distortion cancellation algorithm to project an image onto curved screen without distortion. The virtual objects are represented as if it is located inside the screen. This system allows the user to handle the screen object directly, and gives the user a feel of motion parallax. This system gives the user the ease of perception of positional relationship between the surface of screen and the internal virtual object.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124528066","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
Mesostructure from specularity using gradient illumination 利用梯度照明从镜面观察细观结构
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394637
Yannick Francken, Tom Cuypers, P. Bekaert
{"title":"Mesostructure from specularity using gradient illumination","authors":"Yannick Francken, Tom Cuypers, P. Bekaert","doi":"10.1145/1394622.1394637","DOIUrl":"https://doi.org/10.1145/1394622.1394637","url":null,"abstract":"We present a method to efficiently acquire specular mesostructure normal maps, only making use of off-the-shelf components, such as a digital still camera, an LCD screen and a linear polarizing filter. Where current methods require a specialized setup, or a considerable number of input images, we only need a cheap setup to maintain a similar level of quality. We verify the presented theory on real world examples, and provide a ground truth evaluation on photorealistic synthetic data.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127169972","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
A new system to acquire and restore document shape and content 一个获取和恢复文档形状和内容的新系统
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394638
George V. Landon, W. Seales, D. Clarke
{"title":"A new system to acquire and restore document shape and content","authors":"George V. Landon, W. Seales, D. Clarke","doi":"10.1145/1394622.1394638","DOIUrl":"https://doi.org/10.1145/1394622.1394638","url":null,"abstract":"We have developed a system that can acquire and restore not only a distorted single-page document, but also more complicated multilayer film negatives. In this work, we demonstrate a new image-based document acquisition system, based on single-scatter diffuse transmission, that captures the intrinsic intensity information and shape distortion of documents. Using a simple to build and costeffective camera and LCD system, the data is acquired to allow for automatic photometric and geometric correction of most documents. We show the results of our system with single sheet nonplanar documents. Furthermore, to show the robustness of this system, we demonstrate the restoration on safety acetate film negatives over 70 years old that have been damaged due to shrinkage and other forms of deterioration.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123311529","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
Calibrating multi-projector cylindrically curved displays for "wallpaper" projection 校准多投影仪圆柱弯曲显示“壁纸”投影
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394624
Wei Sun, I. Sobel, W. Culbertson, Dan Gelb, Ian N. Robinson
{"title":"Calibrating multi-projector cylindrically curved displays for \"wallpaper\" projection","authors":"Wei Sun, I. Sobel, W. Culbertson, Dan Gelb, Ian N. Robinson","doi":"10.1145/1394622.1394624","DOIUrl":"https://doi.org/10.1145/1394622.1394624","url":null,"abstract":"This paper presents a novel algorithm for calibrating multiple casually placed projectors, via a single uncalibrated camera, to produce a \"wallpaper\" projection, which is equivalent to printing a single image onto a flat sheet of paper and pasting it to the screen. Based on a piecewise planar model, the method described here combines the advantages of global surface fitting and homographies to generate high accuracy geometric correction independent of the camera position and viewing angle. Experimental results validate the approach, achieving seamless displays with various multi-projector arrangements. The proposed calibration mechanism is applicable to both curved and planar screen surfaces and to single as well as multiple projector displays.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133223788","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: 30
Reducing resolution loss in two-pass rendering by optimal view directions and display-surface partitioning 通过优化视图方向和显示面划分来减少两遍渲染的分辨率损失
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394642
R. M. Steele, C. Jaynes, Ruigang Yang
{"title":"Reducing resolution loss in two-pass rendering by optimal view directions and display-surface partitioning","authors":"R. M. Steele, C. Jaynes, Ruigang Yang","doi":"10.1145/1394622.1394642","DOIUrl":"https://doi.org/10.1145/1394622.1394642","url":null,"abstract":"We describe a method for reducing the amount of aliasing or resolution loss in two-pass rendering for distortion and alignment correction of a projector-based display. Resolution loss is caused by the fact that the second rendering pass must resample the result of the first rendering pass, and the two procedures in general have sampling rates that vary differently. We show that for a flat display surface, it is possible to choose a viewing direction for the first-pass render so that its sampling-rate variations cancel with variations of the second-pass sampling rate. This means that the first-pass effectively samples the projector frame-buffer evenly, so an appropriate resolution for the first-pass render will provide uniformly low aliasing over the entire framebuffer. We also show that, for flat display surfaces, this choice of view direction can be combined with an appropriate first-pass intrinsics matrix to eliminate the need for a second pass. The resulting single-pass rendering algorithm is very similar to existing single-pass techniques, but has a few advantages that we discuss.\u0000 For a non-flat display surface, relative sampling cannot be made perfectly uniform, but the optimal view direction for a best-fit plane provides an approximate solution when the display surface is almost flat. Although the approximation is poor when the display surface differs radically from a plane, we describe a technique for those cases, which automatically subdivides the display surface into partitions that are approximately planar. In common display-surface configurations, great improvements in rendering quality are obtained by using two or three partitions, which causes only modest rendering overhead.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131259882","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
Projector camera system for realtime 3D scanning 投影仪摄像系统实时3D扫描
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394634
Hiroshi Kawasaki, K. Inose, Toshihiro Kawasaki, Furukawa Ryo, R. Sagawa, Y. Yagi
{"title":"Projector camera system for realtime 3D scanning","authors":"Hiroshi Kawasaki, K. Inose, Toshihiro Kawasaki, Furukawa Ryo, R. Sagawa, Y. Yagi","doi":"10.1145/1394622.1394634","DOIUrl":"https://doi.org/10.1145/1394622.1394634","url":null,"abstract":"An active 3D scanning device which can capture a sequential motion in realtime is strongly demanded for 3D display and other VR systems. Since most previous and commercial products basically recover the shape with a point or a line for each scan, fast motion can not be captured in principle. One solution for the purpose is to use a single pattern (one shot scan). However, they often have stability problems and their result tend to have low resolution. In our recent study, we have developed a system which achieved dense and accurate 3D reconstruction from only a single image. The proposed system also had the advantage of being robust in terms of image processing. In this presentation, we introduce outline of our system, several applications and results.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133958357","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
Shadow multiplexing for single camera visual hull reconstruction 用于单摄像机视觉船体重建的阴影多路复用
International Workshop on Projector-Camera Systems Pub Date : 2008-08-10 DOI: 10.1145/1394622.1394630
Tom Cuypers, Yannick Francken, P. Bekaert
{"title":"Shadow multiplexing for single camera visual hull reconstruction","authors":"Tom Cuypers, Yannick Francken, P. Bekaert","doi":"10.1145/1394622.1394630","DOIUrl":"https://doi.org/10.1145/1394622.1394630","url":null,"abstract":"In this work we propose a technique for efficient extraction of multiviewpoint silhouettes using a single camera. To achieve this, we replace the cameras of a typical multi-camera setup with light sources and capture the multiplexed cast shadows. Because we only use a single camera, our setup is much cheaper than a classical setup, no camera synchronization is required, and less data has to be captured and processed. In addition, silhouette extraction is easy and robust, as we are segmenting the cast shadows instead of the background and objects' texture information. We evaluate our method on both a real and a virtual setup, and show that our technique works for a large variety of objects and materials.","PeriodicalId":433468,"journal":{"name":"International Workshop on Projector-Camera Systems","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127375003","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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