图像预处理-图像去噪方面-滤波器-matlab的实现程序，非常清晰- ADJGAMMA- Adjusts image gamma. function g = adjgamma(im, g) Arguments: im - image to be processed. g - image gamma value. Values in the r

matlab的gscale函数功能是将强度图像等映射到别的值范围-Function of matlab gscale intensity image is mapped to a different range of values, etc.

用matlab实现的非线性动态范围调整算法，采用对数函数对图像进行增强，对低照度图像有一定效果-Nonlinear dynamic range adjustment algorithm matlab implementation, using a logarithmic function of image enhancement, image has a certain effect on the illumination

带通滤波器（Butterworth、椭圆、窗函数），采样率fs＝2000Hz, 通带范围为300 -600Hz，阶数自选, 画出频率响应并分析比较， 对cameraman.tif图像分别添加椒盐噪声（密度为0.03）和高斯白噪声（均值为0，方差为0.02）的图像，利用三种方法进行去噪，显示原始图像、加噪图像和去噪图像并对实验结果进行分析(Band pass filter (Butterworth, ellipse, window function), sampling rate FS = 20