方向滤波器 meaning in Chinese
anisotropic filter
direction filter equipment
optical directional filter
Examples
- In this paper , we firstly design orientation filters based on directional image of fingerprint and employ them to denoise gray - scale image . then , we binarize the gray - scale image with local self - adaptive binarization smoothness algorithm and eliminate the noises from the binary image with fast fourier transform algorithm
本文先基于指纹的方向图设计出方向滤波器对原图像进行滤波去噪，然后使用局部平滑阈值自适应二值化算法，将灰度图像进行二值化，并采用快速傅氏变换对所得到的二值化图像进行去噪处理。 - In light of highly dependence among steps of fingerprint preprocessing , we analyzed the whole process of fingerprint preprocessing , proposed new approaches for image preliminary filtering and the design of orientation filter , and got satisfactory results of preprocessing on the fingerprint containing gauss white noise
由于指纹预处理的各个环节之间具有很强的相关性，本文对其全过程作了系统的分析，对其中的图像初滤波和方向滤波器设计的问题提出了新的见解，并对含高斯白噪声的指纹图像取得了较好的预处理效果。 - Because the high resolution on high frequency of wavelet package meets the feature of fingerprint containing abundant high frequency , we filtered the fingerprint preliminarily by means of wavelet package . while designing orientation filter , we introduced the square - circle transform to rotate filter , thus we reduced computing complexity and avoided imported errors
具体地，结合指纹图像中高频丰富的特点，以及小波包高频分辨率高的分析特性，选用小波包对指纹图像进行初滤波；在设计方向滤波器时，对滤波器的旋转引入了方?圆变换的方法，进而减少了计算的复杂度，同时避免引入误差。