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Effects of disparity distribution on visual comfort for multiple objects of stereoscopic images

High technology Letters 2019年第1期25卷 42-47页

作者： Su Zhibin Li Dongrui Zou Fangju Ren Hui Key Laboratory of Acoustic Visual Technology and Intelligent Control System & China Beijing Key Laboratory of Modern Entertainment Technology Communication University of China

With the development of stereoscopic technology, more attention is attracted on the stereoscopic three-dimensional(S3 D) content and service, and researches on images and videos have emerged in large numbers. This paper focuses mainly on visual comfort affected by characteristics of disparity for multiple objects. To find the relationship between disparity distribution and visual comfort perception, several subject evaluation experiments are done. The study contains two spatial distribution types of disparity: 1) only one of the foreground objects has zero disparity; 2) one of the foreground objects has positive disparity, while the other one has negative disparity. The experimental results and relative regression analysis provide appropriate relationship between disparity distribution and visual comfort for both conditions, which is significant to meet the applicant field in S3 D content acquisition, display adjustment and quality evaluation.

关键词： disparity distribution disparity magnitude stereoscopic images visual comfort regression analyses

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Research on communication method of OPC UA client based on ARM 18

Research on communication method of OPC UA client based on A...

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18th IEEE/ACIS International Conference on Computer and Information Science, ICIS 2019

作者： Ren, Hui Liu, Yang Wang, Huiqin Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture Communication University of China Beijing China

ISBN: (纸本)9781728108018

The OPC UA standard overcomes many disadvantages of the traditional OPC, and has significant advantages in platform independence, communication security and model construction, thus completing the information exchange under different platforms and interfaces. At present, the automation system equipment has the problems of complex protocols and interfaces and poor portability of industrial computer. To solve this problem, this paper develops the ARM embedded OPC UA client to complete the data communication with the automation system device server by porting the open62541 open source library on the ARM embedded device equipped with the FreeRTOS system. In this research, by building the OPC UA client on the embedded system, the connection and communication with the server are realized, which is also cheap and flexible to use. Experiments show that the system can be used in equipment debugging, field operation and emergency control, and has a wide range of application prospects and practical value. © 2019 IEEE.

关键词： Ethernet

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Analysis of visual Effects Configuration Scheme for Small Cultural Complex

Analysis of Visual Effects Configuration Scheme for Small Cu...

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Information technology,Big Data and Artificial Intelligence (ICIBA), International Conference on IEEE International Conference on

作者： Chang Sun Zhibin Su Wei Liu Hui Ren School of Information and Communication Engineering Communication University of China Beijing China Key Laboratory of Acoustic Visual Technology and Intelligent Control Ministry of Culture and Tourism School of Information and Communication Engineering Beijing China

ISBN: (纸本)9781665428781

Stage lighting design is an important step in the visual effect configuration scheme of small cultural complex. This paper mainly discusses the lighting configuration of small space with multi-functional art services under different modes such as performance, conference, exhibition, reading and folk customs. Focusing on the analysis of lighting layout methods in drama and artistic performances, this paper takes the drama performing environment as the representative. Through the corresponding subjective evaluation experiments, research and data analysis are carried out on the lamps and lighting methods adopted in the performance. Furthermore, the optimal configuration effect of front light and top light under given constraints is selected. The research provides an effective reference for the lighting configuration of small cultural complexes, which has certain application value and practical significance.

关键词： Layout Lighting Focusing visual effects Software Planning Cultural differences

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Research on Emotion Classification of Film and Television Scene Images Based on Different Salient Region

Research on Emotion Classification of Film and Television Sc...

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culture-oriented Science & technology (ICCST), International Conference on

作者： Zhi-bin Su Bing Liu Li-jing Zhang Hui Ren School of Information and Communication Engineering Communication University of China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism Beijing China

ISBN: (数字)9781728181387

ISBN: (纸本)9781728181394

With the rapid development of intelligent image processing and computer vision, interpreting and extracting emotion information from images have become a hot research topic, especially the studies on film and television scene images with rich expressions and certain feelings from the aspect of audience. To investigate the distribution of emotions and its affect on the result of machine learning, this paper established the emotion classification models with different salient and non-salient regions based on self-built dataset from film and television works. Three salient extraction algorithms were used to the regional segmentation, and the color and texture features of each region were extracted. Emotion classification models were established based on SVM and RF algorithms respectively. Since features of the salient region could not cover all the information of the original image, the prediction accuracy of the unprocessed image was the highest. Nevertheless, when models made an error in the emotion prediction of the original image, the experimental results of salient region could get the correct answer under the certain circumstances. Through the analysis, the areas of interest can be used for emotion prediction to reduce the redundancy; however, to make it more accurate, the appropriate salient region extraction algorithm should be selected for different types of images and features. Our study provides data and theoretical guidance for image understanding and retrieval, and it has practical significance for more detailed classification based on the affective sensation.

关键词： Feature extraction Image color analysis TV Classification algorithms Support vector machines Motion pictures visualization

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A visual Comfort Assessment Approach of Stereoscopic Images based on Random Forest Regressor

A Visual Comfort Assessment Approach of Stereoscopic Images ...

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IEEE Information technology, Networking, Electronic and Automation control Conference

作者： Zhibin Su Dongrui Li Bing Liu Weiwei Li Hui Ren Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism CITVC KEHUA CO. LTD. Technology Service Branch Beijing China

ISBN: (数字)9781728143903

ISBN: (纸本)9781728143910

visual comfort is an important component for stereoscopic image quality and viewing experience. In recent years, it has been widely investigated through feature analysis and different kinds of subjective experiments. In this paper, according to the existing works for objective evaluation model, we have screened and extracted thirteen disparity-based and content-based features through the stereoscopic image. To find the relationship between these features and the given mean opinion score(MOS) of each image, the method of Random Forest (RF) Regressor was used for simulation on the NBU S3D-VCA and IVY database. Compared with other state-of-the-art methods, the experimental results of two benchmarks data have confirmed the superior performance of our proposed approach.

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Stage actor positioning method based on realsense point cloud

Stage actor positioning method based on realsense point clou...

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2019 International Joint Conference on Information, Media, and Engineering, IJCIME 2019

作者： Lv, Chaohui Yang, Lexuan Li, Min Yin, Jun School of Information and Communication Engineering Communication University of China China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism Beijing China

ISBN: (纸本)9781728155869

A novel and convenient method for human positioning based on computer vision is proposed. The new camera Realsense D435 from Intel is used to provide richer and more effective visual information. The positioning problem can be simplified to the conversion problem between point cloud and space coordinate system. Experimental results indicated that only several test points were needed to establish the conversion relationship between the two coordinate systems, thereby obtaining the position of the person. The accuracy meets the demand of the stage performance. © 2019 IEEE.

关键词： Computer vision

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The Perception Effect of Color S3D Images for Multiple Display Modes

The Perception Effect of Color S3D Images for Multiple Displ...

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Artificial Intelligence and Information systems (ICAIIS), 2020 IEEE International Conference on

作者： Zhibin Su Yuan Wang Bing Liu Yunfang Zhang Dongrui Li School of Information and Engineering Communication University of China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism Beijing Key Laboratory of Modern Entertainment Technology Beijing China

ISBN: (数字)9781728165905

ISBN: (纸本)9781728165912

Nowadays, visual comfort and stereo viewing experience are both important indicators for the assessment of Stereoscopic 3D (S3D) image. This paper mainly uses subjective evaluation method to study the perception experience for multiple display devices under varied modes and sizes: time-division 3D screen and 3D projector. A computer-generated object is set as the 3D target, with different parallax magnitude and color. The evaluating indicators include visual comfort, space perception and volume perception. The experimental results proved that in different display modes, the parallax magnitude and color have different effects on the perceived effect. Overall, the time-division screen showed better display performance than the projection. This data and analysis will provide foundational research for the related study of objective assessment of S3D images, and is helpful for the further development of display technology.

关键词： Three-dimensional displays visualization Image color analysis Color Stereo image processing Standards Fitting

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Vehicle object detection based on rgb-camera and radar sensor fusion

Vehicle object detection based on rgb-camera and radar senso...

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2019 International Joint Conference on Information, Media, and Engineering, IJCIME 2019

作者： Li, ZhongTong Yan, Ming Jiang, Wei Xu, Pin School of Information and Communication Engineering Communication University of China Beijing China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism Beijing China

ISBN: (纸本)9781728155869

Object detection has always played a major role in the field of computer vision. With the development of faster region-based convolutional neural network (faster-RCNN), single shot multi-box detector (SSD), You Only Look Once (Yolo) and other deep learning networks, 2D object detection has been developed well developed. However, in some key areas, such as driverless vehicles and artificial intelligence robots, cannot meet the requirements of tasks just by detecting two dimensional (2D) objects. So we need to get the three dimensional (3D) position of the object. In 3D object detection, it is difficult to obtain object position information only by red-green-blue (RGB) image. There are some methods to get the 3D position of the target through the point cloud data set. Therefore, this paper proposes a deep learning network, which can combine both color image information and point cloud geometry information, while using MobileNet V3 as the backbone network greatly enhances the operation speed. The region proposal networks (RPN) layer in faster-RCNN is migrated to the network. After testing, the method proposed by us improves obviously in speed and recognition accuracy compared with the previous methods. © 2019 IEEE.

关键词： Object detection

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Point Cloud Denoising Algorithm Based on Noise Classification

Point Cloud Denoising Algorithm Based on Noise Classificatio...

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culture-oriented Science & technology (ICCST), International Conference on

作者： Chaohui Lv Min Li School of Information and Communication Engineering Communication University of China Beijing China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism Beijing China

ISBN: (数字)9781728181387

ISBN: (纸本)9781728181394

Aiming at the problem of different kinds of noise in 3D point cloud data, we propose a point cloud denoising method based on noise classification. This algorithm first divides noise in point cloud data into inner points and outer points, and uses radius filtering and statistical filtering to remove the outer points. Then, normal and curvature information of point cloud are estimated by the principal component analysis. At the same time, curvature information is introduced into the bilateral filtering factor to improve the existing algorithm. Ultimately, we smooth inner points mixed in point cloud by utilizing the modified algorithm. Comparing the improved algorithm with the bilateral filtering algorithm on the bunny, horse and dragon model, experimental results indicate that the maximum error and the average error are reduced. The algorithm in this paper makes models' features maintained better while models are smoothed.

关键词： Three-dimensional displays Filtering Filtering algorithms Classification algorithms Solid modeling Noise reduction Smoothing methods

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Study on the classification of beatbox sounds based on timbre features

Study on the classification of beatbox sounds based on timbr...

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culture-oriented Science & technology (ICCST), International Conference on

作者： Jiaxing Zhu Junping Wang Jingyu Liu Xiaoyi Zhang Conservatory of Music Key Laboratory of Acoustic Visual Technology and Intelligent Control System (Communication University of China) Ministry of Culture and Tourism Beijing Key Laboratory of Modern Entertainment Technology Communication University of China School of Information and Communication Engineering Communication University of China Beijing China

ISBN: (数字)9781728181387

ISBN: (纸本)9781728181394

Beatbox is a performance form of vocal percussion, which is gradually favored by people with continuous development in recent years. With the abundance of Beatbox content on the Internet, the research on its automatic classification becomes very significant. In this article, we mainly using machine learning methods, to identify the beatbox timbre. First of all, we collected 900 Beatbox audio materials and constructed a database. Secondly, 14 acoustic parameters of audio material are extracted by the signal processing method. Finally, we used MultilayerPerceptron, SMO, BayesNet, RandomForest in current machine learning to build a training model for BB timbre classification. The Experimental results showed that the model could classify BB timbre well.

关键词： Timbre Classification algorithms Machine learning algorithms acoustics Music Training Signal processing algorithms

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