type: presentations

label: url

en: Underwater Object Detection through Analysis and Data Augmentation of Underwater Datasets

en: Lecture Notes in Networks and Systems

ja: Lecture Notes in Networks and Systems


en: Context Similarity-enabled CU Partitioning Algorithm in VVC

en: 2023 5th International Conference on Communications, Information System and Computer Engineering (CISCE)

en: Guangzhou, China

ja: Guangzhou, China


en: Depth Estimation with Sonar-based Correction for Low-cost Underwater Drone

en: OCEANS2022 Hampton Roads

ja: OCEANS2022 Hampton Roads

en: Hampton Roads

ja: Hampton Roads


en: Object Recognition based Self-Position Estimation for Underwater Robots


en: YOLOX based Underwater Object Detection for Inshore Aquaculture


en: Domain Adaptive Semantic Segmentation Through Photorealistic Enhancement of Video Game

en: Proceedings of IEEE International Conference on Consumer Electronics(ICCE)


en: Low-Complexity Intra Coding Algorithm Based on Convolutional Neural Network for HEVC

en: Proceedings of 2018 International Conference on Information and Computer Technologies (ICICT2018)

en: IEEE

ja: IEEE

en: DeKalb, USA

ja: DeKalb, USA

en: 本論文は，HEVCにおけるCNNを用いた低演算量画面内符号化アルゴリズムを提案した．従来，画面内符号化モード決定手法において周辺の画素をCNNに入力する方法があったが，本論文は4つ並列に入力する構造を提案した．提案手法を実装しシミュレーションした結果，従来手法に比べ画質の劣化がほとんどなく，平均67%の高速処理を実現した．


en: Spatial Locality Based Supplemental Modes for Intra Prediction of HEVC

en: Proceedings of IEEE International Conference on Consumer Electronics(ICCE-Taiwan 2015)

en: Taipei

ja: Taipei

en: 本論文は，HEVCの画面内符号化において画素間の空間相関性を利用した新規符号化方式を提案した．符号化対象CUの画素に対し隣接4画素を4ブロックに分け，符号化済ブロックの情報を用いて残りのブロックを符号化する手法を提案し，使用する効率的なフィルタを提案した．提案手法を参照ソフトウェアJM12.1に実装しシミュレーションした結果，従来手法に比べ平均8.4%の符号化効率向上を実現した．


en: Merge Prediction Algorithm for Adaptive Parallel Improvement of High Efficiency Video Coding

ja: Proceedings of IEEE International Conference on Consumer Electronics(ICCE-Taiwan 2015)

en: 本論文は，GPUなど並列処理性能が高く要求される環境においてHEVCを実装する場合に，マージモードのアルゴリズムを改良することにより，並列処理性能を高めるアルゴリズムを提案した．処理単位CTUに対し，PUの動きベクトルをCTU周辺の動きベクトルより予測し，PU間の相関性を無くし，符号化効率への影響を最小限にする手法を提案した．提案手法を参照ソフトウェアHM12.0に実装しシミュレーションした結果，従来手法に比べわずか0.1%未満の符号化効率低下まで抑え，並列処理を可能にした．


en: Computational Complexity Reduction Algorithm of Sub-Pixel Motion Estimation for HEVC

en: The 27th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2012)

en: Sapporo

ja: Sapporo

en: The emerging standard of HEVC (High Efficiency Video Coding) is on the last stage for recommendation. However, the computational complexity of motion estimation is still the bottleneck for the implementation of HEVC. In this paper, we propose a complexity reduction algorithm for the fractional-pixel motion estimation. The proposed algorithm designs several original search patterns for 1/2 pixel and 1/4 pixel motion estimation. These proposed patterns are on the basis of the probability of each search point and its surrounding integer search points. Simulation results show that the proposed algorithm succeed in reduction of search point for up to 35% with almost no coding efficiency loss.


en: Motion Estimation Algorithm for Spatial Scalability in H.264/SVC

en: Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11)

en: The Research Institute of Signal Processing Japan

en: Tianjin, China

ja: Tianjin, China

en: In this paper, we propose an improved low complexity algorithm for spatial scalability of H.264/SVC on the basis of the motions in the sequences. First, verification is performed to confirm the redundancy of the previous motion estimation process of H.264/SVC. Then, based on the evaluation results we propose an improved algorithm for our previous work in which only focuses on the complexity reduction of enhancement layer. The proposed algorithm can decrease the computation complexity of the enhancement layer using the inter layer motion prediction. The simulation results show that the proposed algorithm can achieve over 95% complexity reduction comparing to the original JSVM. When it is compared with our previous works, 12% complexity reduction has been achieved.


en: Improved Inter-layer Intra Prediction for Scalable Video Coding

ja: Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11)

ja: The Research Institute of Signal Processing Japan

en: In this paper, a method based on the two dimensional Wiener filter is proposed in addition to inter-layer intra prediction in H.264/SVC. The performance of inter-layer intra prediction is limited due to the up-sampling operation and the coding noise of base layer. The Wiener filter can be used as an optimizing filter to enhance the prediction of enhancement. However, prediction errors of some pixels are increased by this filter operation. The proposed method applies the filter for each block of different size adaptively. Experimental results show that the reduction of bit rate and PSNR improvement for QCIF-CIF Akiyo sequences are 3.74% and 1.15dB without considering the bit cost of filter operation.


en: Novel Variable Search Range Selection Algorithm for H.264/SVC

en: In this paper, a novel variable search range selection algorithm is proposed for the H.264/SVC. The scalable extension of H.264/AVC achieves high scalability as well as high coding efficiency. However, the exhausted computation complexity becomes the implementation difficulty. In variable block size motion estimation, we find that motion estimation process has much redundancy. On the basis of this feature, we propose a novel variable search range algorithm that can significantly reduce the redundant search range. Simulation results show that the proposed method can achieve high computation complexity reduction with very slight PSNR loss.


en: Fast Parallel Algorithm of Motion Estimation for GPU Implementation

en: Due to the rapid growth of the processing capability of graphics processing unit (GPU), using GPU as a coprocessor to assist the CPU in computing massive data becomes essential. In this work, we propose a fast parallel algorithm for motion estimation (ME) process in H.264/AVC on a computer unified device architecture (CUDA) platform. The proposed algorithm performs the parallel calculation of the residuals and SAD. Simulation results show that with the assistance of GPU the processing time is about 2 times faster than that of using CPU only.


en: Fast Spiral Motion Estimation Algorithm for H.264/AVC

en: Variable block size and multiple reference frames are introduced in H.264/AVC. However, these new features induce significant implementation complexity increases. In this paper, fast spiral motion estimation (FSME) is proposed based on our previous spiral motion estimation (SME) algorithm and its architecture. When the sum of absolute differences (SAD) closes to the best search position, a convergent value of SAD is available. The proposed FSME reduces the search point candidates with the characteristic of SAD. Simulation results show that about 63% search points in motion estimation is realized by negligible video quality degradation.


en: Adaptive Search Range Motion Estimation Algorithm for H.264/AVC

en: 2007 IEEE International Symposium on Circuits and Systems(ISCAS'07)

en: IEEE

en: New Orleans

ja: New Orleans

en: In this paper, a novel variable search range algorithm is proposed for the H.264/AVC. From simulation results we find that how much the search range could be reduced to achieve an optimum search range have strong relation with the average of the frame motion vectors. Based on these simulation results an adaptive search range algorithm which estimate the most efficient search range from the previous frames with a adaptively search range adjustment method is proposed. Simulation results show that proposed algorithm could achieve the motion estimation by average 45% computation complexity compare with the reference software with equivalent PSNR and the bitrate results.


en: 顕著性マップに基づく再学習用データセット厳選アルゴリズム

ja: 顕著性マップに基づく再学習用データセット厳選アルゴリズム

en: Journal of Shikoku-Section Joint Convention of the Institutes of Electrical and Related Engineers

ja: 電気関係学会四国支部連合大会講演論文集

en: Tokushima

ja: 徳島


en: ドローン映像における高精度小数画素精度動き補償フィルタ

ja: ドローン映像における高精度小数画素精度動き補償フィルタ

ja: 電気関係学会四国支部連合大会講演論文集


en: 樹木型直線スタイナー配線の近似解法

ja: 樹木型直線スタイナー配線の近似解法

ja: 電気関係学会四国支部連合大会講演論文集

en: Matsuyama

ja: 松山


en: H.264/AVCにおける動き探索範囲に関する研究

ja: H.264/AVCにおける動き探索範囲に関する研究

en: Proceedings of IEICE Society Conference

ja: 電子情報通信学会ソサイエティ大会講演論文集


en: H.264/AVCデコーダにおける低演算量デブロッキングフィルタ実装手法

ja: H.264/AVCデコーダにおける低演算量デブロッキングフィルタ実装手法

en: IEICE Technical Report

ja: 電子情報通信学会技術研究報告

en: Institute of Electronics, Information and Communication Engineers

ja: 電子情報通信学会


en: H.264/AVCにおけるフレームメモリアクセス手法

ja: H.264/AVCにおけるフレームメモリアクセス手法

ja: 電子情報通信学会技術研究報告