用matlab编写一段代码,能够实现图像复原、图像增强、图像压缩、图像滤波、彩色图像处理、图像分割
时间: 2023-09-26 22:07:56 浏览: 138
以下是一些基于 MATLAB 的示例代码,用于实现图像处理中的各种任务:
1. 图像复原:
a. 基于 Wiener 滤波的图像复原:
```matlab
im = imread('input_image.jpg');
h = fspecial('motion', 20, 45); % motion blur filter
noise_var = 0.0001;
noise_mean = 0;
noise_im = imnoise(im, 'gaussian', noise_mean, noise_var);
im_restore = deconvwnr(noise_im, h, noise_var);
imshowpair(noise_im, im_restore, 'montage');
```
b. 基于逆滤波的图像复原:
```matlab
im = imread('input_image.jpg');
h = fspecial('gaussian', [11 11], 10);
noise_var = 0.0001;
noise_mean = 0;
noise_im = imnoise(im, 'gaussian', noise_mean, noise_var);
im_restore = deconvreg(noise_im, h);
imshowpair(noise_im, im_restore, 'montage');
```
2. 图像增强:
a. 基于直方图均衡化的图像增强:
```matlab
im = imread('input_image.jpg');
im_eq = histeq(im);
imshowpair(im, im_eq, 'montage');
```
b. 基于对比度增强的图像增强:
```matlab
im = imread('input_image.jpg');
im_adj = imadjust(im, [0.2 0.8], []);
imshowpair(im, im_adj, 'montage');
```
3. 图像压缩:
a. 基于小波变换的图像压缩:
```matlab
im = imread('input_image.jpg');
[c, s] = wavedec2(im, 2, 'haar');
thr = 20;
c(abs(c) < thr) = 0;
im_comp = waverec2(c, s, 'haar');
imshowpair(im, im_comp, 'montage');
```
b. 基于 JPEG 压缩的图像压缩:
```matlab
im = imread('input_image.jpg');
imwrite(im, 'input_image.jpg', 'Quality', 50);
im_comp = imread('input_image.jpg');
imshowpair(im, im_comp, 'montage');
```
4. 图像滤波:
a. 基于高斯滤波的图像滤波:
```matlab
im = imread('input_image.jpg');
h = fspecial('gaussian', [11 11], 2);
im_filt = imfilter(im, h);
imshowpair(im, im_filt, 'montage');
```
b. 基于中值滤波的图像滤波:
```matlab
im = imread('input_image.jpg');
im_filt = medfilt2(im, [3 3]);
imshowpair(im, im_filt, 'montage');
```
5. 彩色图像处理:
a. RGB 到灰度图像转换:
```matlab
im = imread('input_image.jpg');
im_gray = rgb2gray(im);
imshowpair(im, im_gray, 'montage');
```
b. RGB 到 HSV 图像转换:
```matlab
im = imread('input_image.jpg');
im_hsv = rgb2hsv(im);
imshow(im_hsv(:, :, 1)); % 显示色调通道
```
6. 图像分割:
a. 基于阈值分割的图像分割:
```matlab
im = imread('input_image.jpg');
im_gray = rgb2gray(im);
thresh = graythresh(im_gray);
im_bw = imbinarize(im_gray, thresh);
imshowpair(im_gray, im_bw, 'montage');
```
b. 基于区域生长的图像分割:
```matlab
im = imread('input_image.jpg');
im_gray = rgb2gray(im);
seed = [100, 100]; % 种子点坐标
reg = regiongrowing(im_gray, seed);
imshowpair(im_gray, reg, 'montage');
```
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