| Title | Monocular Vision based Indoor Mobile Robot |
| Author | *Naoya Tada, Keisuke Murata, Takeshi Saitoh, Tomoyuki Osaki, Ryosuke Konishi (Tottori University, Japan) |
| Page | pp. 41 - 44 |
| Keyword | monocular vision, indoor mobile robot, boundary detection, obstacle detection |
| Abstract | This paper presents the indoor mobile robot that moves automatically without needing environment information beforehand while recognizing the frontal surrounding environment with only one general camera. Based on the frontal image, the robot detects two boundary lines, some obstacle regions, and a moving direction. When the obstacle is detected, the avoidance or stop movement is worked according to the size and the position of the obstacle, otherwise the robot moves at the center of the corridor. We developed two wheelchair based mobile robots, and carried out moving experiments. It was possible to pass each other without colliding by working the avoidance movement in face-to-face movement in the coexistence environment. |
| Title | A Scrambling Method for JPEG Coded Images Enabling Image Retrieval from Scrambled Images |
| Author | *Ryo Hosaka (Tokyo Metropolitan University, Japan), Fitri Arnia (Universitas Syiah Kuara, Indonesia), Masaaki Fujiyoshi, Hitoshi Kiya (Tokyo Metropolitan University, Japan) |
| Page | pp. 49 - 52 |
| Keyword | Image compression, Similarity measurement, Pseudo random numbers, Privacy |
| Abstract | This paper proposes a scrambling method for JPEG coded images and an image retrieval method for scrambled JPEG images. The proposed method scrambles JPEG images and retrieves a identical image or similar images from scrambled images. By utilizing the positive and negative signs of discrete cosine transformed coefficients as the characteristics, the method is able to retrieve the images which are compressed with the same and different ratios as the query image, without descrambling and JPEG decording. |
| Title | Fast Reprojection using Tree-Structured Filter Bank from Cone Beam Projections |
| Author | *Hiroaki Morimoto, Kazuhiro Ueda, Yoshitaka Morikawa (Okayama University, Japan) |
| Page | pp. 53 - 56 |
| Keyword | 3D X-ray CT, Cone Beam Projections, Tree-Structured Filter Bank, Reprojection |
| Abstract | Recently, 3D X-ray CT which reconstructs 3D image receives much attention. The strict method of 3D image reconstruction from cone beam projections was proposed by Grangeat. However it requires much computation time to reconstruct 3D distribution. In this paper, the authors proposes a method using Tree-Structured Filter Bank (TSFB) to reduce processing time of reprojection which requires many calculations in Grangeat's method. |
| Title | A Location Map-Free Reversible Data Hiding Method Inserting Data to Image Edges |
| Author | *Michihiko Ono, Masaaki Fujiyoshi, Hitoshi Kiya (Tokyo Metropolitan University, Japan) |
| Page | pp. 57 - 60 |
| Keyword | Watermarking, Lossless, Standard deviation, Sobel filter |
| Abstract | This paper proposes a reversible data hiding method that embeds data to image edges. The proposed method once distorts an original image to embed data, it restores the original image as well as extracts hidden data from the image conveying hidden data. To extract data and to recover the original image, this method memorizes only one parameter and does not require any location map that records the positions conveying hidden data. Differing from the conventional method having these features, the proposed method is able to hide data to only image edges. Simulation results show the effectiveness of the proposed method. |