Norihiko Kawai

Norihiko Kawai
Osaka Institute of Technology · Department of Information Media

Doctor of Engineering

About

34
Publications
2,734
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288
Citations

Publications

Publications (34)
Article
Full-text available
Vision-induced gustatory manipulation interfaces can help people with dietary restrictions feel as if they are eating what they want by modulating the appearance of the alternative foods they are eating in reality. However, it is still unclear whether vision-induced gustatory change persists beyond a single bite, how the sensation changes over time...
Article
Image completion is a technique to fill missing regions in a damaged or redacted image. A patch-based approach is one of major approaches, which solves an optimization problem that involves pixel values in missing regions and similar image patch search. One major problem of this approach is that it sometimes duplicates implausible texture in the im...
Conference Paper
We propose a new imaging method that achieves an ultra-shallow depth of field (DoF) to clearly visualize a particular depth in a 3-D scene. The key optical device consists of a pair of faced paraboloidal mirrors with holes around their vertexes. In the device, a lens-less image sensor is set at one side of their holes and an object is set at the op...
Article
Full-text available
Non-photorealistic rendering (NPR) creates images with artistic styles of paintings. In this field, a number of methods of converting photographed images into non-photorealistic ones have been developed, and can be categorized into filter-based and exemplar-based approaches. In this paper, we focus on the exemplar-based approach and propose a novel...
Article
Augmented reality (AR) marker hiding is a technique to visually remove AR markers in a real-time video stream. A conventional approach transforms a background image with a homography matrix calculated on the basis of a camera pose and overlays the transformed image on an AR marker region in a real-time frame, assuming that the AR marker is on a pla...
Article
Full-text available
Image inpainting has been widely investigated to remove undesired parts of images. One of the effective approaches is exemplar-based inpainting, which uses texture patterns in an image as exemplars for filling in missing regions. As one of exemplar-based methods, an inpainting method based on automatic perspective correction using vanishing points...
Article
Full-text available
This paper proposes a novel approach to generate stereo video in which the zoom magnification is not constant. Although this has been achieved mechanically in a conventional way, it is necessary for this approach to develop a mechanically complex system for each stereo camera system. Instead of a mechanical solution, we employ an approach from the...
Article
Full-text available
Augmented reality (AR) applications often require virtualized real objects, i.e., virtual objects that are built based on real objects and rendered from an arbitrary viewpoint. In this paper, we propose a method for real object virtualization and AR image generation based on view-dependent geometry modification and texture mapping. The proposed met...
Article
Diminished reality aims to remove real objects from video images and fill in the missing regions with plausible background textures in real time. Most conventional methods based on image inpainting achieve diminished reality by assuming that the background around a target object is almost planar. This paper proposes a new diminished reality method...
Conference Paper
Full-text available
Image inpainting, which removes undesired objects in a static image and fills in the missing regions with plausible textures, has been developed in the research fields of image processing. On the other hand, Diminished Reality (DR), which visually removes real objects from video images by filling in the missing regions with background textures in r...
Article
This paper proposes a background estimation method from a single omnidirectional image sequence for removing undesired regions such as moving objects, specular regions, and uncaptured regions caused by the camera's blind spot without manual specification. The proposed method aligns multiple frames using a reconstructed 3D model of the environm...
Conference Paper
This paper proposes a new diminished reality method for 3D scenes considering background structures. Most conventional methods using image inpainting assumes that the background around a target object is almost planar. In this study, approximating the background structure by the combination of local planes, perspective distortion of texture is corr...
Article
Full-text available
This paper proposes a new diminished reality technique which removes AR markers from a user's view image. In order to achieve natural marker hiding, three factors should be considered; (1) naturalness of texture generated on a marker area. (2) geometric consistency between consecutive frames, (3) photometric consistency between a marker area and it...
Conference Paper
Full-text available
This paper proposes a new method of diminished reality which removes AR markers from a user's view image in real time. To achieve natural marker hiding, assuming that an area around a marker is locally planar, the marker area in the first frame is inpainted using the rectified image to achieve high-quality inpainting. The unique inpainted texture i...
Conference Paper
This paper proposes a novel image inpainting method to remove undesired objects in an image. Conventionally, missing regions are filled in using similar textures in an image as exemplars. However, unnatural textures are often generated due to the paucity of available samples. In this study, we take into account symmetric transformation of texture p...
Conference Paper
In this paper, we propose a novel surface completion method to generate plausible shapes and textures for missing regions of 3D models. The missing regions are filled in by minimizing two energy functions for shape and texture, which are both based on similarities between the missing region and the rest of the object; in doing so, we take into acco...
Article
Full-text available
Omnidirectional multi-camera systems cannot capture entire fields of view because of their inability to view areas directly below them. Such invisible areas in omnidirectional video decrease the resulting realistic sensation experienced when using a telepresence system. In this study, we generate omnidirectional video without invisible areas using...
Article
Full-text available
3D mesh models generated with a range scanner or video images often have holes due to occlusions by other objects and the object itself. This paper proposes a novel method to fill in the missing regions in incomplete models. The missing regions are filled in by minimizing an energy function that is defined based on the similarity of local shapes be...
Conference Paper
Full-text available
Toward a really useful navigation system, utilizing spherical panoramic photos with maps like Google Street View is efficient. Users expect the system to be available in all areas they go. Conventional shooting methods obtain the shot position from GPS sensor. However, indoor areas are out of GPS range. Furthermore, most urban public indoor areas a...
Article
Omnidirectional multi-camera systems cannot capture entire fields of view because of their inability to view areas directly below them. Such invisible areas in omnidirectional video decrease the resulting realistic sensation experienced when using a telepresence system. In this study, we generate omnidirectional video without invisible areas using...
Conference Paper
Surface completion is a technique for filling missing regions in 3D models measured by range scanners and videos. Conventionally, although missing regions were filled with the similar shape in a model, the completion process was fairly inefficient because the whole region in the model was searched for the similar shape. In this paper, the completio...
Conference Paper
Omnidirectional cameras usually cannot capture the entire direction of view due to a blind side. Thus, such an invisible part decreases realistic sensation in a telepresence system. In this study, an omnidirectional video without invisible areas is generated by filling in the missing region using an image inpainting technique for highly realistic s...
Conference Paper
Full-text available
This paper describes a spatio-temporal super-resolution method using depth maps for static scenes. In the proposed method, the depth maps are used as the parameters to determine the corresponding pixels in multiple input images by assuming that intrinsic and extrinsic camera parameters are known. Because the proposed method can determine the corres...
Conference Paper
Full-text available
Image inpainting techniques have been widely investigated to remove undesired objects in an image. Conventionally, missing parts in an image are completed by optimizing the objective function using pattern similarity. However, unnatural textures are easily generated due to two factors: (1) available samples in the image are quite limited, and (2) p...
Conference Paper
Image inpainting techniques have been widely used to remove undesired visual objects in images such as damaged portions of photographs and people who have accidentally entered into pictures. Conventionally, the missing parts of an image are completed by optimizing the objective function which is defined based on the sum of SSD (sum of squared diffe...
Article
博士(Doctor) 工学(Engineering) 奈良先端科学技術大学院大学 博第902号

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