-
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
-
qixiang
气象色谱波峰波谷检测，比较简单的方法，欢迎大家下载(Meteorological chromatographic peaks and valleys detection)
- 2013-11-15 14:12:21下载
- 积分：1
-
惯导解算函数
说明： 用于SINS导航解算与姿态速度位置更新的matlab程序(Matlab program for SINS navigation solution and attitude velocity position update.)
- 2020-03-21 10:41:30下载
- 积分：1
-
costas
用MATLAB的simulink实现costas环的.mhl文件(Using MATLAB-simulink realization costas Central. Mhl document)
- 2008-04-26 18:34:59下载
- 积分：1
-
zhichixiangliangji1
基于MATLAB利用Particle-in-cell模型,对梯形管内壁等离子体离子注入过程,进行了二维数值模拟.计算结果表明在中心电极附近出现了“阳极鞘层”,该鞘层内部不存在离子,而且在鞘层边缘离子密度最高.在上下管壁上的离子注入剂量呈现“m”形分布.通过对注入过程中等离子体密度分布和不同时间段管壁不同位置离子注入剂量的跟踪,发现“阳极鞘层”扩展行为是导致“m”形分布的原因.由于梯形管形状的不对称性,“阳极鞘层”的边缘向梯形长底方向扩展较快.在注入初始时刻离子注入的能量很低,随着时间延长离子能量逐渐升高,这是由离子初始位置决定的.可见梯形管自身形状决定了鞘层形状和最终的离子注入能量和剂量分布.(Based on MATLAB use Particle-in-cell model, the trapezoidal pipe wall plasma ion implantation process, the numerical simulation of two-dimensional calculation results show that in the vicinity of the center electrode to a "anode sheath," which does not exist inside the plasma sheath, and the highest in the sheath edge ion density ion implantation dose showing the upper and lower walls of the "m"-shaped distribution through the process of injecting the plasma density distribution and the wall at different locations in different time periods ion implantation dose tracking, found that "anode sheath "extension behavior is leading to" m "-shaped distribution of the reasons due to the asymmetry of the trapezoidal shape of the tube," Edge anode sheath "extension to the end of a long trapezoid direction quickly in the initial moment of implantation energy ion implantation is low ion energy with time gradually increased, which is determined by the initial position of the ion. visible trapezoida)
- 2014-01-09 14:08:57下载
- 积分：1
-
Sliding-Mode-Control
系统论述了滑模变结构控制的基本理论、基本方法和应用技术，并全部给出了MATLAB仿真分析。全书内容涵盖了滑模变结构控制发展综述、连续系统滑模控制、自适应鲁棒滑模控制、欠驱动系统滑模控制、反演及动态面滑模控制、基于滤波器及观测器的滑模控制、离散系统滑模控制、模糊滑模控制、神经滑模控制和机械手滑模控制等。(The basic theory, basic method and application technology of sliding mode variable structure control are discussed systematically, and all MATLAB simulation analysis is given. The book covers the development of sliding mode variable structure control, continuous system sliding mode control, adaptive robust sliding mode control, underactuated system sliding mode control, inversion and dynamic surface sliding mode control, based on the filter and observer sliding Mode control, sliding mode control of discrete systems, fuzzy sliding mode control, neural sliding mode control and manipulator sliding mode control.)
- 2016-12-27 16:26:52下载
- 积分：1
-
lab1
傅里叶变换与逆变换, Matlab程序。The main focus of this lab lab is converting between the frequency and time domain.
(Fourier Transform Forward and inverse)
- 2013-11-13 21:01:09下载
- 积分：1
-
Neural-Networks
Neural Networks（神经网络）在Matlab中的应用(Neural Networks (neural networks) applications in Matlab)
- 2014-02-25 16:43:07下载
- 积分：1
-
EMS Microgrid
说明： 含风力发电、光伏、微型燃气轮机、储能的微电网能量管理，采用粒子群算法优化。(Particle swarm optimization (PSO) is used to optimize the energy management of microgrid including wind power generation, photovoltaic, micro gas turbine and energy storage.)
- 2021-04-12 21:08:57下载
- 积分：1
-
CA-MOEA_PlatEMO
说明： 基于聚类的不规则Pareto前沿多目标优化的自适应进化算法(A clustering based adaptive evolutionary algorithm for multi-objective optimization with irregular Pareto fronts)
- 2020-07-16 21:28:22下载
- 积分：1
