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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
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chap1_1
直流电机调速系统仿真，建立模型，系统仿真，画出仿真曲线(DC motor speed control system simulation, modeling, system simulation, simulation curve drawn)
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Models
对于一个房间 用PID和DMC控制空调温度控制系统(For a room with air-conditioning temperature control PID and DMC control system)
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pulse-compression
研究压缩感知理论在脉冲雷达中的具体应用问题，同时对目标距离进行估计。(Research on the application of compressed sensing theory on pulse radar, and estimate the target distance.)
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lfm_jc
线性调频信号的模糊度图，模糊函数图，自相关函数，多普勒频移仿真(Ambiguity Figure chirp signal ambiguity function diagram, autocorrelation function, Doppler shift simulation)
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hist2d
2D Histrogram
Two Dimention Histogram function
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MMSE_detection_2x2
MMSE detection of frequency offset
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UKF
无迹卡尔曼滤波代码，matalb程序代码(Without the unscented Kalman filter code, matalb, program code)
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EM_CD
基于高斯混合模型和EM（Expectation Maximization）算法的SAR影像变化监测算法，并附带示例。总体思路是首先将两个时期的SAR影像做log和ratio运算，生成差分影像，然后通过EM算法估计高斯混合模型的参数，最后根据高斯混合模型最大概率，生成变化监测结果。(Unsupervised change detection method for SAR images using EM algorithms of Gaussian mixture model)
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101259328yiqun1
说明： 一个典型的蚁群算法示例,可以参考学习,讨论.一个很好的典型的蚁群算法示例,(A typical ant colony algorithm for example, can refer to learn, discuss. A very good example of a typical ant colony algorithm,)
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