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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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z
说明： 用matlab做数字滤波器
对滤波因子加窗函数fir滤波因子的设计(Add to the filter window function fir filter design)
- 2009-04-01 22:12:19下载
- 积分：1
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11912888matlab
Very low cost, low component count charger/adapter – replaces linear transformer based solutions
• Extremely simple circuit configuration designed for high volume, low cost manufacturing
- 2009-03-01 10:59:59下载
- 积分：1
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MATLAB_programming_source_image_low_pass_filter
MATLAB编程图像低通滤波源码MATLAB programming source image low-pass filter(MATLAB programming image low-pass filter source MATLAB programming source image low-pass filter)
- 2010-08-03 12:18:26下载
- 积分：1
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Regularity_Rythm
After we calculate the R peaks of the ecg signal, we identify different
criteria :
a) Heart rate.
b) Regularity of the R-R peaks (Look at the R-R distances).
1. Regular (are they equidistant apart).
2. Irregular.
c) Rhythm
1. Tachycardia ==> Fast.
2. Bradychardia ==> Slow.
3. Normal.
- 2010-10-05 18:03:45下载
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MIMO
说明： 详细的讲述了mimo 的原理 应用背景 适用范围
是英文版的(Described in detail the background mimo application of the principle of application is in English)
- 2011-04-06 09:51:52下载
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shuzhi-fenxi
此为北京航空航天大学数值分析教材当中的2-5章所涉及问题的MATLAB源程序，程序附有详细的解释，值得学习。(This is the Beijing University of Aeronautics numerical analysis of materials in which the issues involved in Chapter 2-5 of the MATLAB source code, the program with a detailed explanation, it is worth learning.)
- 2011-11-28 10:42:23下载
- 积分：1
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radar-zabo-fenbu-process
雷达信号处理杂波分布仿真matlab代码，包含瑞利杂波，韦伯杂波等(radar signal process)
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multiple-unicast
code run output for multiple paths for aodv only
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func_rayforward
射线追踪正演程序，给定发射接收点位置和介质衰减系数。(Ray tracing forward procedure, given transmitter and receiver positions and medium attenuation coefficient.)
- 2013-05-28 17:07:43下载
- 积分：1
