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Description: 图象处理中常用的一些经典图片，这里提供的都是tif格式的，包括lena，goldhill，cameraman
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Size: 2765019 |
Author: 焦斌星 |
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Description: 用于图像处理与分析-for image processing and analysis
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Size: 53248 |
Author: 魏建明 |
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Description: 图象处理中常用的一些经典图片，这里提供的都是tif格式的，包括lena，goldhill，cameraman-Image processing used in some of the classic picture, here are tif format, including the lena, goldhill, cameraman
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Size: 2764800 |
Author: 焦斌星 |
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Description: I = imread( rice.png ) I2 = imread( cameraman.tif ) K = imdivide(imadd(I,I2), 2)
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Size: 3072 |
Author: 孙强 |
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Description: Gabor滤波器经常被用于形状检测和特征提取，比如增强指纹图像。本代码用matlab实现了一个二维Gabor滤波器。
代码使用如下：
function [G,gabout] = gaborfilter1(I,Sx,Sy,f,theta)
from gaborfilter1 with different f(Frequency) and theta(Angle).
for example
f:0,2,4,8,16,32
theta = 0,pi/3,pi/6,pi/2,3pi/4
then for any input image like(eg. stereo.jpg)
you have 6x5 = 30 filtered images.
You can choose your desired angles or frequencies.
You can put nominaly Sx & Sy = 2,4 or some one else.
For instance I tested above example on ( cameraman.tif )(in MATLAB pictures)
I = imread( cameraman.tif )
[G,gabout] = gaborfilter1(I,2,4,16,pi/3)
figure,imshow(uint8(gabout)) -Gabor filters are often used for shape detection and feature extraction, such as the enhanced fingerprint image. Matlab implementation of the code is a two-dimensional Gabor filter. Use the following code: function [G, gabout] = gaborfilter1 (I, Sx, Sy, f, theta) from ' gaborfilter1' with different f (Frequency) and theta (Angle). For example f: 0,2,4, 8,16,32 theta = 0, pi/3, pi/6, pi/2,3 pi/4 then for any input image like (eg. stereo.jpg) you have 6x5 = 30 filtered images. You can choose your desired angles or frequencies. You can put nominaly Sx & Sy = 2,4 or some one else. For instance I tested above example on (' cameraman.tif' ) (in MATLAB pictures) I = imread (' cameraman.tif' ) [G, gabout] = gaborfilter1 (I, 2,4,16, pi/3) figure, imshow (uint8 (gabout))
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Size: 1024 |
Author: 郑碧波 |
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Description: 参考国外网站资料，自己实现的海宁窗滤波函数。滤波测试图像为matlab自带的cameraman.tif图片。-Hanning filter program in Matlab
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Size: 51200 |
Author: gjf281 |
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Description: 应用db5小波和 bior4.4小波, 对图象cameraman.tif分别进行2层小波分解和重构-The application db5 wavelet bior4.4 of wavelet image cameraman.tif 2-layer wavelet decomposition and reconstruction
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Size: 53248 |
Author: 甘德英 |
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Description: 利用图像类间方差阀值分割进行图像分割，原始图像为cameraman.tif。-Image between-class variance threshold segmentation for image segmentation.
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Size: 5120 |
Author: 王占武 |
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Description: 利用·图像类间方差阀值分割进行图像分割，原始图像为cameraman.tif-Image between-class variance threshold segmentation image segmentation, the original image is cameraman.tif
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Size: 1024 |
Author: 王占武 |
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Description: 图像分割阀值自动化确定，通过迭代，达到最优分割点。tif-Image between-class variance threshold segmentation image segmentation, the original image is cameraman.tif
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Size: 1024 |
Author: 王占武 |
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Description: The image "cameraman.tif" will be binarize with the classic OTSU algortithm. At the same time, the histogram will be shown
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Size: 1024 |
Author: bkbiet |
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Description: 倒转图像，图像的倒转，得到的图像为cameraman.tif的翻个图像-Inverted images, image inversion, the resulting image is the turn images cameraman.tif
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Size: 101376 |
Author: 耿朝晖 |
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Description: 此文件一共包含3个m文件。第一个文件的功能是绘制一个二值图像，并显示其傅立叶幅度谱。文件2功能是设计频域理想低通滤波器，并加以验证：读入一个二值图像(cameraman.tif)加噪声后在频域进行低通滤波观察滤波后的图像效果。文件3的功能是对图像eight.tif加入椒盐噪声后，实现Butterworth低通滤波.-This file contains 3 m documents. Functions of first file is to draw a binary image, and displays its Fourier amplitude spectrum. Document 2 is designed to function a frequency domain ideal low-pass filter , and verified it: reading a binary image (cameraman.tif) plus noise on it and smoothing it in the frequency domain using low-pass filtering.The filtered effect will be observed by displaying image.Document 3 is designed to read a binary image(eight.tif) and add salt and pepper noise on it, realized frequence domain Butterworth low-pass filter.
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Size: 1024 |
Author: 唐欢 |
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Description: 采用四种算子对cameraman.tif进行边缘检测-Using the MATLAB software development platform, four kinds of operators are used to detect the edge of cameraman.tif.
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Size: 1024 |
Author: luo |
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Description: 对cameraman.tif图像进行DCT变换，分别选取最大的1/4、1/8、1/16个变换系数(其余置为0)，进行反DCT得到重构图像，显示原图像和各重构图像并分别计算重构图像的峰值信噪比。-Cameraman.tif DCT transform of the image, were selected maximum 1/4,1/8,1/16 transform coefficients (the remainder is set to 0), inverse DCT to obtain the reconstructed image, the original image and displaying a reconstructed image of each and calculate the peak signal to noise ratio of the reconstructed image.
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Size: 1024 |
Author: 王丽 |
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Description: 对cameraman.tif图像进行DCT变换，分别选取最大的1/4、1/8、1/16个变换系数(其余置为0)，进行反DCT得到重构图像，显示原图像和各重构图像并分别计算重构图像的峰值信噪比。-Cameraman.tif DCT transform of the image, were selected maximum 1/4,1/8,1/16 transform coefficients (the remainder is set to 0), inverse DCT to obtain the reconstructed image, the original image in a reconstructed image and various and calculate the peak signal to noise ratio of the reconstructed image.
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Size: 10240 |
Author: zy |
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Description:
1、图像中值滤波实验
①用imnoise函数在图像’lena.bmp’中值添加椒盐噪声，观测结果
②用medfilt2函数对含噪声图像中值滤波。
2、使用fspecial函数生成均值、Prewitt、Sobel、Laplacian滤波模板，再用filter2函数对‘cameraman.tif’图像进行空域滤波，显示滤波结果。
3、设计高斯低通和高通频域滤波器，对‘phantom.bmp’图像进行频域滤波，显示滤波结果。然后改变滤波器截止频率，观察对结果的影响。
4、用imdilate, imerode, imopen, imclose函数对‘326.bmp’进行膨胀，腐蚀，开启，闭合运算。（结构单元均取3*3矩形模板）。-1, image filtering experiment ① with imnoise function adds salt and pepper noise image ' lena.bmp' in value, with observations ② medfilt2 function noisy image filtering. 2, using the function generation fspecial mean, Prewitt, Sobel, Laplacian filter template, and then filter2 function ' cameraman.tif' image spatial filtering, display filtering results. 3, the design of Gaussian low-pass and high-pass filter in the frequency domain, for ' phantom.bmp' image frequency domain filtering, filtering results show. Then change the filter cutoff frequency, observe the effect on the results. 4, with imdilate, imerode, imopen, imclose function ' 326.bmp' is expanded, erosion, opening and closing operations. (Structural units were taken 3* 3 rectangle template).
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Size: 116736 |
Author: 郭亚周 |
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Description:
1.编写程序，完成灰度分段线性变换。如下图所示，输入两个点的坐标完成对图像的分段线性对比度拉伸。
2. 学习使用histeq函数，完成
①对’lena.bmp‘的直方图均衡化；
②以’cameraman.tif’的直方图为模板，将’lena.bmp’做直方图匹配。
3. 不使用histeq函数，自己编写程序完成直方图均衡化，并显示直方图均衡化前后的图像以及其直方图。
4. 不使用histeq函数，自己编写程序完成直方图匹配，显示匹配前后的图像、模板直方图和匹配过的直方图。
-1. Write a program to complete the gray piecewise linear transformation. As shown below, enter the coordinates of two points to complete the piecewise linear contrast of the image stretched. 2. Learn to use histeq function, complete ① on ' lena.bmp' histogram equalization ② to ' cameraman.tif' histogram as a template, the ' lena.bmp' do histogram matching. 3. Do not use histeq function, write your own program to complete histogram equalization, and display the image and its histogram before and after histogram equalization. 4. Do not use histeq function, write your own program to complete histogram matching, display images before and after the match, the template histogram and histogram matching too.
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Size: 1024 |
Author: 郭亚周 |
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Description: 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 = 2000Hz, passband range of 300 -600Hz, order optional, draw frequency response, and analysis and comparison,
Respectively, add salt and pepper noise of the cameraman.tif image (density of 0.03) and Gauss white noise (mean 0 and variance 0.02) image denoising using three methods, shows the original image, noise image and image denoising and analysis of experimental results)
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Size: 1024 |
Author: 潇潇暮雨
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