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图像预处理 字符识别实例(I&II) 有助于处理验证码(图像预处理——字符识别实例(I&II))

lam do an chuyen nganh vat va qua di

Abstract— We propose a simple speech compression algorithm using subband division and ADPCM (Adaptive Differential Pulse Code Modulation) algorithm. Although speech data are stored in a semiconductor memory device, its capacity and the available network capacity are limited. Therefore, it is necessary to compress the data as much as possible. The first is that the reconstructed datum must be understood correctly. Speech signal is compressed with a ratio of 1/4 using the proposed subband division and ADPCM (Adaptive Differential Pulse Code Modulation) algorithm.

PSO Simple algorithm for optimization

遗传算法在函数中的应用，它包括编码、交叉、变异、选择等详细的编程，对学习遗传算法很有帮助。(Genetic Algorithms in a function application, which includes coding, crossover and mutation, select details such as programming, genetic algorithm is useful for learning.)

词典编码LZW编解码的基本实现，包含LZW的编码和解码，实现了对lena图的编解码，用于数字图像处理。(The dictionary coding LZW the basic realization of the codec, including LZW encoding and decoding, the codec lena FIG for digital image processing.)

常用的上下行信道模型，写的很清晰，适合入门的人看。(Commonly used up and down the channel model, written in a very clear, people will look for entry.)

粒子群算法例子中的单目标发电调度粒子群算法的程序(Single target generation particle swarm optimization algorithm)

基于802.11ofdm仿真，主要针对信道同步，包括各种同步方法(802.11ofdm based on simulation, the main channel for synchronization, including synchronization method)

用模糊神经网络逼近二维非线性函数，Matlab文件，附有说明文件。(Using fuzzy neural network approximation of two-dimensional nonlinear function, Matlab files, accompanied by documentation.)