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Description: 本文完成了对唇动身份识别技术几个基本问题的理论研究,并对整个系统加以实现.作为本文研究的实验基础,我们建立了唇动方式身份识别数据库(HITLUDB),
该库目前包含30个说话人每人20个汉语词的音视频语料.数据库的扩充与完善工作仍在不断的进行之中.在嘴唇检测方面,
我们对自适应色度过滤模型进行改进,提高了算法的鲁棒性,完成了对嘴唇的精确定位.结合DCT变换与K-L变换的各自特点,
我们提出了特征提取算法,使用较少维数的特征完成了对嘴唇区域主要信息的刻画.由于唇动信息同时包含了生理特征与行为特征,
我们使用静念动念混合建模的方式,完成了对说话人唇动个性特点的精确描述.在HMM训练时,我们提出了特征的归一化处理方法,提高了HMM在实际应用中的性能.
最后,我们分别对身份辨认系统与身份确认系统的基本理论进行了叙述,并完成了系统的实践工作.
关 键 词：身份识别 唇动 特征提取 隐马尔可夫模型 K-L变换 -paper completed the lip movements identification technology several basic issues of theoretical study, system as a whole be achieved. As this paper, the experimental basis, We have established a dynamic manner lip identification database (HITLUDB) The library currently contains 30 words each of 20 Chinese words, sound and video corpus. and the expansion of the database is still perfect keep going on. Detection of the lips, we adaptive color filter model improvements, improve the robustness of the algorithm, completed a pair of lips the precise positioning. DCT combined with the K-L transform their own characteristics, We have proposed a feature extraction algorithm, use less dimension of the lips completed the main message of regional characterization. As the lip movements of information,
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Size: 5222806 |
Author: 李岚熙 |
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Description: this si Arithmetic core,it contains FreeDCT-L and FreeDCT-M.FreeDCT-L is a low power architecture 1-Dimensional 8-point DCT/IDCT core.FreeDCT-M is a moderate speed 1-Dimensional IDCT core
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Size: 866848 |
Author: lilei |
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Description: 本文完成了对唇动身份识别技术几个基本问题的理论研究,并对整个系统加以实现.作为本文研究的实验基础,我们建立了唇动方式身份识别数据库(HITLUDB),
该库目前包含30个说话人每人20个汉语词的音视频语料.数据库的扩充与完善工作仍在不断的进行之中.在嘴唇检测方面,
我们对自适应色度过滤模型进行改进,提高了算法的鲁棒性,完成了对嘴唇的精确定位.结合DCT变换与K-L变换的各自特点,
我们提出了特征提取算法,使用较少维数的特征完成了对嘴唇区域主要信息的刻画.由于唇动信息同时包含了生理特征与行为特征,
我们使用静念动念混合建模的方式,完成了对说话人唇动个性特点的精确描述.在HMM训练时,我们提出了特征的归一化处理方法,提高了HMM在实际应用中的性能.
最后,我们分别对身份辨认系统与身份确认系统的基本理论进行了叙述,并完成了系统的实践工作.
关 键 词：身份识别 唇动 特征提取 隐马尔可夫模型 K-L变换 -paper completed the lip movements identification technology several basic issues of theoretical study, system as a whole be achieved. As this paper, the experimental basis, We have established a dynamic manner lip identification database (HITLUDB) The library currently contains 30 words each of 20 Chinese words, sound and video corpus. and the expansion of the database is still perfect keep going on. Detection of the lips, we adaptive color filter model improvements, improve the robustness of the algorithm, completed a pair of lips the precise positioning. DCT combined with the K-L transform their own characteristics, We have proposed a feature extraction algorithm, use less dimension of the lips completed the main message of regional characterization. As the lip movements of information,
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Size: 5222400 |
Author: QHLee |
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Description: 行程编码，JPEG压缩编码（基本系统）
命令行编译过程如下
vcvars32
rc bmp.rc
cl compress.c bmp.res user32.lib gdi32.lib-itinerary coding, JPEG coding (basic system) command line compiler process following vcvars32 mail c bmp.rc l compress.c bmp.res user32.lib gdi32.lib
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Size: 191488 |
Author: 李云 |
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Description: 数字图像压缩算法，基于MATLAB的数字图像压缩算法，DCT格式
-digital image compression algorithm based on MATLAB digital image compression algorithm, DCT format
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Size: 46080 |
Author: liupeng |
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Description: this si Arithmetic core,it contains FreeDCT-L and FreeDCT-M.FreeDCT-L is a low power architecture 1-Dimensional 8-point DCT/IDCT core.FreeDCT-M is a moderate speed 1-Dimensional IDCT core
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Size: 866304 |
Author: lilei |
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Description: Project 2D DCT core - specifications and codes-Project 2D DCT core- specifications and codes
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Size: 264192 |
Author: student |
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Description: 1.对一个256*256的图像进行DCT变换得到图像D，将D得斜下角数值置为零，然后进行DCT反变换.
2.对源图像进行K-L转换
1和2比较-1.Get a grey level image which size is N*N. (For example, 256*256, however,
N = ), and partition to 8*8 sub images.
2.. Apply DCT to these sub images, and get the transformed image D with DCT
coefficients for elements.
3. From D, keep the coefficient values for only upper left triangular region and set
zeros for lower right region to approximate the image. (That is, only half of data
is used.)
4.Take Inverse DCT to get the approximated image.
2 . Get the covariance matrix of image.
3 . Calculate the corresponding eigenvectors and eigenvalues.
4 . Represent the original image with Singular Value Decomposition.
5 . Approximate the image by taking off the 4 smallest eigenvalues. (That is, only
half of information is used.)
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Size: 1024 |
Author: zhengyan |
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Description: 包含几个小程序，包括基音周期提取，生物医学信号压缩：DCT变换，K-L变换等-Contains several procedures, including the pitch period extraction, biomedical signal compression: DCT transform, KL transform
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Size: 1024 |
Author: liyii |
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Description: 本实验为设计性实验，其目的是理解有损压缩的概念，特别是通过K-L变换或DCT变换，掌握压缩编码的基本原理、算法，并通过编程给予实现，对原始图像数据和解压后的图像数据进行失真估计，了解压缩性能及其重建效果的影响、作用，给出适当的理论分析。-Image compression coding program design
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Size: 12288 |
Author: oscar |
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Description: 研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散
余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的
K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角
阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这
反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特
性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。
虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。
-Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete
The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images
Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix
Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this
Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image
Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect.
Although from related to the performance of the sense, DCT is a kind o
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Size: 546816 |
Author: chen |
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Description: 基于DCT&DWT的数字水印算法包括水印的嵌入提取，常规的信号处理攻击及水印的评估标准-关闭翻译英语中文德语检测语言
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基于DCT&DWT的数字水印算法包括水印的嵌入提取，常规的信号处理攻击及水印的评估标准
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您是不是要找： 基于DCT DWT的数字水印算法包括水印的嵌入提取,常规的信号处理攻击及水印的评估标准DCT & DWT based digital watermarking algorithms include the watermark embedding extraction, evaluation criteria and conventional signal processing attacks watermark
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Size: 1376256 |
Author: 彭述 |
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Description: 用于现代信号分析与处理课程，作用是实现K-L变换和DCT变换。-For modern signal analysis and processing programs, the role is to achieve the KL transform and DCT.
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Size: 1024 |
Author: pcyan |
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Description: 用于现代信号分析与处理课程，作用是实现K-L变换和DCT变换。-For modern signal analysis and processing programs, the role is to achieve the KL transform and DCT.
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Size: 1024 |
Author: pcyan |
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Description: 基于DCT的jsteg图像隐写及分析算法，MATLAB实现。
JSteg的算法主要思想是将秘密消息嵌入在量化后的DCT系数的最低比特位上，但对原始值为O、1的DCT系数不进行嵌入。提取秘密消息时，只需将载密图像中不等于0、l的量化DcT系数的LSB取出即可。(The main idea of the JSteg algorithm is to embed secret messages in the lowest bit of the quantized DCT coefficients, but the DCT coefficients of the original values are O and 1 are not embedded. When extracting secret messages, only the LSB of the quantized DCT coefficients not equal to 0 and l in the encrypted image can be taken out.)
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Size: 812032 |
Author: 人气呆毛选手
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