【摘要】 图像去噪是指纹图像预处理中的重要内容,直接影响着指纹识别系统的准确率。结合中值滤波与小波去噪分别去除椒盐噪声和高斯噪声中的优势,提出了一种指纹图像混合去噪算法,并对其中的关键步骤进行了详细分析。仿真结果表明:相对于单一使用一种去噪方法,混合去噪算法能更有效地去除指纹图像中的椒盐和高斯混合噪声,获得了较好的峰值信噪比增益。更多还原

【Abstract】 Image denoising is the important content of fingerprint image preprocessing,, impacting to the accuracy rate of fingerprint identification system. Combining the advantages of median filtering and wavelet transform in denoising salt and pepper and gauss noise, bring up a sort of mixing denoise algorithm, and analyze the critical steps on detail. Simulation result indicates that mixing denoise algorithm is more effective than using a single denoising method , and acquire better peak value signal-noise-ratio gain.更多还原