In this paper, a 3-D video encoding scheme suitable for digital TV/HDTV (high definition television) is studied through computer simulation. The encoding scheme is designed to provide a good match to human vision. Bas...In this paper, a 3-D video encoding scheme suitable for digital TV/HDTV (high definition television) is studied through computer simulation. The encoding scheme is designed to provide a good match to human vision. Basically, this involves transmission of low frequency luminance information at full frame rate for good motion rendition and transmission of high frequency luminance signal at reduced frame rate for good detail in static images.展开更多
The paper describes a texture-based fast text location scheme which operates directly in the Discrete Wavelet Transform (DWT) domain. By the distinguishing texture characteristics encoded in wavelet transform domain, ...The paper describes a texture-based fast text location scheme which operates directly in the Discrete Wavelet Transform (DWT) domain. By the distinguishing texture characteristics encoded in wavelet transform domain, the text is fast detected from complex background images stored in the compressed format such as JPEG2000 without full decompress. Compared with some traditional character location methods, the proposed scheme has the advantages of low computational cost, robust to size and font of characters and high accuracy. Preliminary experimental results show that the proposed scheme is efficient and effective.展开更多
The most common noises in ECG （electrocardiogram） signal processing are BW （baseline wandering） and the 50 or 60 Hz PLI （power line interferences）. In order to remove these two major source of noises, we have us...The most common noises in ECG （electrocardiogram） signal processing are BW （baseline wandering） and the 50 or 60 Hz PLI （power line interferences）. In order to remove these two major source of noises, we have used the recent powerful DWT （discrete wavelet transform） signal processing in ECG signals which are obtained from MIT-BIH Arrhythmia Database. The results indicate that DWT is a good method for filtering noises without changing the morphology of ECG, and can be applied to all types of ECG signals, whether normal or presenting arrhythmias.展开更多
SPIE-Vol.3817 01195121999年 SPIE 会议录,卷3817:图象处理用并行和分布式方法=1999 proceedings of SPIE,Vol.3817:Paralleland distributed methods for image processing[会,英]/SPIE-The International Society for Optical Engine...SPIE-Vol.3817 01195121999年 SPIE 会议录,卷3817:图象处理用并行和分布式方法=1999 proceedings of SPIE,Vol.3817:Paralleland distributed methods for image processing[会,英]/SPIE-The International Society for Optical Engineer-ing.—1999.—168P.(EC)本会议录收集了于1999年7月22日在科罗拉多州 Denver 召开的图象处理并行与分布式方法会议上发表的15篇论文,内容涉及离散子波变换的并行结构,MPEG-4运动估计结构,软件环境与工具,算法与应用,自适应相邻对比度增强技术,图象压缩中优化滤波因子的多代理系统,实时人脸识别系统,陆地矿物探测用普遍计算环境。展开更多
文摘In this paper, a 3-D video encoding scheme suitable for digital TV/HDTV (high definition television) is studied through computer simulation. The encoding scheme is designed to provide a good match to human vision. Basically, this involves transmission of low frequency luminance information at full frame rate for good motion rendition and transmission of high frequency luminance signal at reduced frame rate for good detail in static images.
文摘O438 98053095基于子波变换的数字图象压缩算法=Study of anefficient compression algorithm for digital im—ages[刊,中]/祁大勇,韩月秋(北京理工大学电子工程系。北京(100081))∥北京理工大学学报。—1997,17(1)。
基金Supported by the National Natural Science Foundation of China(No.60402036)the Natural Science Foundation of Beijing(No.4042008).
文摘The paper describes a texture-based fast text location scheme which operates directly in the Discrete Wavelet Transform (DWT) domain. By the distinguishing texture characteristics encoded in wavelet transform domain, the text is fast detected from complex background images stored in the compressed format such as JPEG2000 without full decompress. Compared with some traditional character location methods, the proposed scheme has the advantages of low computational cost, robust to size and font of characters and high accuracy. Preliminary experimental results show that the proposed scheme is efficient and effective.
文摘The most common noises in ECG （electrocardiogram） signal processing are BW （baseline wandering） and the 50 or 60 Hz PLI （power line interferences）. In order to remove these two major source of noises, we have used the recent powerful DWT （discrete wavelet transform） signal processing in ECG signals which are obtained from MIT-BIH Arrhythmia Database. The results indicate that DWT is a good method for filtering noises without changing the morphology of ECG, and can be applied to all types of ECG signals, whether normal or presenting arrhythmias.
文摘SPIE-Vol.3817 01195121999年 SPIE 会议录,卷3817:图象处理用并行和分布式方法=1999 proceedings of SPIE,Vol.3817:Paralleland distributed methods for image processing[会,英]/SPIE-The International Society for Optical Engineer-ing.—1999.—168P.(EC)本会议录收集了于1999年7月22日在科罗拉多州 Denver 召开的图象处理并行与分布式方法会议上发表的15篇论文,内容涉及离散子波变换的并行结构,MPEG-4运动估计结构,软件环境与工具,算法与应用,自适应相邻对比度增强技术,图象压缩中优化滤波因子的多代理系统,实时人脸识别系统,陆地矿物探测用普遍计算环境。
