-
JPEGimageCompressiontechniquesimplementationandopt
摘 要
文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。
简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。
介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。
JPEG标准的特点是离散余弦变换。
比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
(Abstract
Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results.
Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method.
JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding.
JPEG standard is characterized by discrete )
- 2009-03-29 08:39:04下载
- 积分：1
-
从0开始移植UCOS II到野火STM32开发板.pdf
从0开始移植UCOS II到STM32开发板，十分详细的资料，讲的很清楚。手把手教学(From 0 to the UCOS II to STM32 development board, very detailed information, very clear. Hand handle teaching)
- 2018-02-03 10:33:57下载
- 积分：1
-
ch6
用MATLAB实现哈夫曼编码的例程（以子函数形式给出）
NORM2HUFF 哈夫曼编码器
对于输入向量，NORM2HUFF(X) 返回向量的哈夫曼编码后的码串()
- 2007-08-29 20:00:35下载
- 积分：1
-
CHAP5_4
此代码为基于遗传算法摩擦模型参数辨识的PID控制MATLAB仿真代码(This code is based on genetic algorithm for parameter identification of friction model simulation of PID control of MATLAB code)
- 2009-11-03 14:25:00下载
- 积分：1
-
Structuralparameteroptimizationofbinocular
研 究了双目视觉测量系统的结构参数优化问题.对双目视觉测量的有效视场约束条件进行了数学
描述，建立了双目视觉坐标测量系统的数学模型.在考虑像点提取误差的条件下，利用误差理论建立了测量
误差模型，并基于待测量的视场范围要求，定义了测量系统结构参数的优化指标。最后，通过枚举法进行了
优化求解.(Studied binocular vision measurement system to optimize the structural parameters of the problem. For the effective measurement of binocular vision bound by the terms of field of view of mathematical description of the establishment of binocular vision coordinate measuring system mathematical model. In considering the error as the point of extraction conditions the use of error theory the establishment of measurement error model and measurement based on the field of view to be the scope of the requirements of the definition of the measurement system parameters to optimize the structure of indicators. Finally, the optimized enumeration method for solving.)
- 2009-04-20 15:52:14下载
- 积分：1
-
fig4
Program of publication
"Fast Channel Shortening with Polynomial Weighting Functions"
- 2010-12-08 02:58:27下载
- 积分：1
-
zishiyin
1.设计自适应信号分离器，用以从白噪声中提取周期信号。其中选取正弦信号s=sin(2*pi*t/10)为周期信号，宽带噪声信号为高斯白噪声，设置参考通道延迟为50。
2.宽带信号中的窄带干扰抑制实际上是自适应信号分离的一种应用，借助自适应信号分离器可以方便的实现窄带干扰的对消。(1. Design of adaptive signal separator, used to extract from the white noise periodic signal. The extraction of sinusoidal signals s = sin (2* pi* t/10) for periodic signals, broadband noise signal is Gaussian white noise, set the reference channel delay of 50.
2. Wideband signals in the narrow-band interference suppression is actually an application of adaptive signal separation, using adaptive signal separator can be easily achieved narrowband interference cancellation.)
- 2010-01-13 18:38:32下载
- 积分：1
-
mmse_diedai08
最佳权向量自适应迭代更新MSE对比波形，内有详细说明，供大家参考。(optimal weight vector adaptive waveform update MSE contrast, with detailed notes for reference.)
- 2007-06-05 01:30:31下载
- 积分：1
-
EC
说明： 遗传算法matlab代码，经过检测无错，希望对大家有用(Genetic algorithm matlab code, error detection)
- 2013-12-29 19:46:57下载
- 积分：1
-
pfsr92
opracowanie wykresów i obliczeń do przesuwnia fazy
- 2010-06-23 23:53:37下载
- 积分：1
