wavelet transform

First, apply wavelet transform on a vehicle_license_plate image to denoise it, then threshold the image on condition of keeping the intensity moment invariable.

首先，对车牌图像进行小波去噪，然后利用亮度矩对去噪后的车牌图像进行阈值分割。

The enhancement algorithm based on wavelet transform could extrude mass by adding the plus factor.

再引入增益因子,采用基于小波变换的增强算法突出肿块阴影.

Dual-Tree Complex Wavelet Transform ( DT-CWT ) can provide shift invariance and directional selectivity.

对偶树复小波变换具有良好的方向选择性和平移不变性.

The selection of threshold function and determination of decomposition level are two key steps in threshold-based nonlinear filtering by wavelet transform.

阈值函数选择和分解尺度确定是基于阈值的小波域非线性滤波的两个关键步骤。

Digital Watermarking Technique of Image Based on Visibility Threshold Model in Wavelet Transform Domain

基于小波域中视觉门限模型的数字水印技术

The dyadic wavelet transform utilizes local modulus maximum a wavelet transform to obtain multiscale edges information.

二进小波变换利用模局部极大值来提取图像的多尺度边缘信息.

Via the threshold operation on wavelet packet transform of images, Gauss color noise can be better filtered, yet there is usually many impulse noise in the images.

通过对图像的子波包变换进行阈值操作，可以较好地滤除高斯白噪声，但图像中往往还含有脉冲噪声，运用中值滤波可以有效地滤除脉冲噪声。

However, it performs a little worse compared to the conventional Discrete Wavelet Transform ( DWT ) for lossy compression.

而在有损压缩方面, 其效果通常稍逊于传统的离散小波变换(DWT ).

A New Threshold Function De-Noising Method Based on Wavelet Transform

基于小波变换的新阈值函数去噪方法

A rotation invariant texture classification algorithm based on log-polar and Dual-Tree Complex Wavelet Transform ( DT-CWT ) is proposed.

提出了一种基于对数 - 极坐标变换(Log-Polar )和双树复数小波变换 ( DT-CWT ) 的旋转不变纹理分类算法.