Description: Rotates an image by the angle degrees in the % CCW direction. Degrees may be any number. % The function will put degrees in the range 0 % to 360 degrees and then into a range of -45 to 45 % degrees after performing elementary 90 degree rotations. Platform: |
Size: 3236 |
Author:Hawking |
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Description: Rotates an image by the angle degrees in the % CCW direction. Degrees may be any number. % The function will put degrees in the range 0 % to 360 degrees and then into a range of -45 to 45 % degrees after performing elementary 90 degree rotations.-Rotates an image by the angle degrees in the % CCW direction. Degrees may be any number. % The function will put degrees in the range 0 % to 360 degrees and then into a range of-45 to 45 % degrees after performing elementary 90 degree rotations. Platform: |
Size: 3072 |
Author: |
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Description: 图像集群（Image Clustering）
(1)图像读入，显示图像所在路径；
(2)采用imgcluster函数进行图像集群，选择集群个数后进行图像集群；
(3)运行后，在原图像上显示集群灰度图；
(4)若要显示各个集群情况，可打开【Show Clustering Image】新窗体，显示各集群类的基于原图的彩绘区域。其中非当前集群范围，则显示灰度为255的黑色。用户可点击按纽上下查看所有集群图。-image cluster (Image Clustering) (1) read into the images, Images show host path; (2) use of imgcluster function for image clusters, After the number of clusters chosen for image clusters; (3) After the operation, in the original image displayed on the gray level clusters; (4) To show that the various clusters, [Show Open Clustering Image-- new windows, showed that the cluster type based on the maximum of regional painting. Clusters of non-current range, it shows that the intensity of 255 black. Users can click on View All button next cluster map. Platform: |
Size: 113664 |
Author:mecal |
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Description: 基于DCT域的数字图像水印的处理，经测试可以达到对水印检测的功能。这是一个完成各种数字图像水印的算法的程序，里面也实现了dct以及水印的改进算法，程序移植性好 -Based on the DCT-domain watermarking digital image processing, can be achieved by testing the function of the watermark detection. This is a complete range of digital image watermarking algorithm procedure, which also realize the DCT and watermark algorithm transplantation procedures and good Platform: |
Size: 521216 |
Author:xudangshi |
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Description: 摘要:为了提高图像复原算法的性能 ,提出了一种改进的奇异值分解法估计图像的点扩散函数。从图像的退化离散模型
出发 ,对图像进行逐层分块奇异值分解 ,并自动选取奇异值重组阶数以减少噪声对估计的影响。利用理想图像奇异值向
量平均能谱指数模型 ,估计点扩散函数奇异值向量的频谱 ,再反傅里叶变换得到其时域结果。实验结果表明 ,该方法能
在不同信噪比情况下估计成像系统的点扩散函数 ,估计结果比原有估计方法有所提高 ,有望为图像复原算法的预处理提
供一种有效的手段。-Abstract : To improve the performance of image restoration algorithms , a modified Singular Value De2
[ ] [ ]
composition SVD method was proposed to estimate the Point Spread Function PSF of an imaging
system. Using the discrete image degradation model , a block2based SVD filter scheme was applied for
the image denoising with an automatically determined singular value rank. After the spectra of PSF
singular vectors were estimated under an exponential model for the averaged spectra of un2degraded
image singular vectors , the IFFT was used to get the time2domain estimation of the PSF. The experi2
mental results show that this proposed method can be applied to estimate the PSF of the imaging sys2
tem under a wide SNR range and its performance is better than the original method. It may be used as
an effective method for the image preprocessing in image restoration problems.
[ ]
Key words: image restoration Point Spread Function PSF block2based Singular Value Decomposi2 Platform: |
Size: 476160 |
Author:zy |
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Description: ch5_1_1： 图像灰度线性变换 （§5.1.1）
ch5_1_2： 图像灰度分段线性变换 （§ 5.1.1）
ch5_1_3： 采用对数形式的变换函数进行动态范围压缩 （§5.1.1）
ch5_1_4： 图像直方图的均衡化 （§5.1.2）
ch5_1_5： 直方图规定化 （§5.1.2）
-ch5_1_1: image linear transformation (§ 5.1.1) ch5_1_2: piecewise linear image transform (§ 5.1.1) ch5_1_3: the use of logarithmic transformation of the form of dynamic range compression function (§ 5.1.1) ch5_1_4 : Image histogram equalization (§ 5.1.2) ch5_1_5: Histogram of the provisions of (§ 5.1.2) Platform: |
Size: 6144 |
Author:汤跃峰 |
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Description: This function combines image rescaling and writing into the one function. If the image type is double image values are rescaled to the range 0-1 so that no overflow occurs when writing 8-bit intensity values. The image format to use is determined by MATLAB from the file ending. If the image type is of uint8 no rescaling is performed. Platform: |
Size: 1024 |
Author:n |
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Description: 近年来，随着互联网的高速发展，网上的多媒体信息也急剧增加，这些多媒体信息以图像为主。如何从浩瀚的图像数据库中快速、准确地找出所需要的图像，己成为一个备受关注的研究课题。有效地组织、管理和检索大规模的图像数据成为迫切需要解决的问题。于是基于内容的图像检索(Content-Based Image Retrieval: CBIR)作为一个崭新的研究领域出现了。
本课题拟研究、分析彩色图像红、绿、蓝三基色直方图的生成、特征提取和相似度等问题，应用图像的颜色信息—三基色直方图对图像进行检索。针对基于颜色的图像检索，本文采用应用广泛的RGB颜色空间来表示图像的颜色特征，对颜色分量进行等间隔量化并形成特征矢量并对特征矢量进行归一化处理，采用图像均匀分块的方法引入图像中色彩所处的位置信息，用距离度量函数进行图像的相似性匹配。在此基础上实现了基于三基色直方图算法的检索系统。
本文的研究和实践对于促进基于内容的图像数据库检索技术的应用具有一定的参考价值和实践意义。-With the rapid development of Internet, the multimedia information is booming. All this information is mostly images. Effective recognizing, management and searching all these images have been an emergent problem. This has led the rise of a new research and development field: Content-Based Image Retrieval (CBIR).
The topics to research, analysis color images red, green and blue color histogram generation, feature extraction and the similarity of the issues, application of the color image- trichromatic histogram of the image retrieval. Based on the color against the static image retrieval, this paper application of a wide range of RGB color space to indicate the color image features, the color components, such as spacing and quantitative characteristics of a feature vector and a normalization of vector processing, using uniform image block the introduction of the method in which the color image Location information, and distance measuring function similar to the image of the match. On Platform: |
Size: 408576 |
Author:qichao |
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Description: MATLAB图像处理工具箱提供了灰度调整函数imadjust()，可以将图像的灰度值调整到一个指定的范围-MATLAB image processing toolbox provides a grayscale adjusting function imadjust (), you can adjust the gray scale image to a specified range Platform: |
Size: 101376 |
Author:郑继刚 |
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Description: 自定义函数画图软件，软件的函数输入部分分为4部分，针对的是4个分段函数，当然也可以扩展为5段，六段，如果你的函数不用分段，那就只用在第一个edit里面写下你的函数表达式即可，同时要在后面写出x的范围，和cftool里面的custom equation一样，只能用matlab语法规范的函数表达式，即你不要写2x而是2*x，不要把我们的数学表达式和matlab表达式搞混淆了。从gif可以看出，在第一个edit输入不同的函数，有多项式函数，指数函数，三角函数，对数函数，axes都能有正确的图形，另外用其他edit配合，画出分段函数图像。因此，这可软件无论你是单个函数还是分段函数（4段以内）均可正确画出，当然还配合有grid选项，如果想保持画出的图形，无需QQ截屏，直接点保存键，将它以jpg的格式，存入到你想要存的文件夹里面。要想查对应点的函数值时，只用在edit里面输入x值，按回车就可以得到，注意x值是在范围之内的，支持结果累积，最终将以一个表格的形式显示出来，如果要想画新的图形，点击清空按键即可。-Drawing software-defined functions, the software function of the input part is divided into 4 parts, for the four sub-functions, of course, can also be extended to 5, Liu Duan, if you do not have sub-function, then only the first an edit which you can write your function expression, while the range in the back to write x, and cftool inside the custom equation, can only function with matlab syntax specification expression, but that you do not write 2x 2* x, not to our matlab mathematical expressions and expressions confused. It can be seen from the gif, in the first edit enter a different function, there polynomial functions, exponential functions, trigonometric functions, logarithmic functions, axes can have the right graphics, the other with the use of other edit, draw piecewise function image. Therefore, it can be software or whether you are single function piecewise functions (4 or less) can be correctly drawn, of course, with a grid option, if you want to keep drawing the graphics, Platform: |
Size: 30720 |
Author:ydb |
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Description: A figure ready to scroll through and play videos. You can also draw any custom graphics on it.-VIDEOFIG(NUM_FRAMES, @REDRAW_FUNC) creates a figure with a horizontal scrollbar and shortcuts to scroll automatically. The scroll range is 1 to NUM_FRAMES. The function REDRAW_FUNC(F) is called to redraw at scroll position F (for example, REDRAW_FUNC can show the frame F of a video).
This can be used not only to play and analyze standard videos, but it also lets you place any custom Matlab plots and graphics on top.
Jiro posted a great example on the Pick of the Week blog, along with a nice GIF animation so you can see it in motion:
http://blogs.mathworks.com/pick/2010/12/10/video-player-for-your-frame-based-processing/
EXAMPLE 1
Place this in a file called "redraw.m":
function redraw(frame)
imshow([ AT3_1m4_ num2str(frame, 02.0f ) .tif ])
end
Then from a script or the command line, call:
videofig(10, @redraw)
redraw(1)
The images "AT3_1m4_01.tif" ... "AT3_1m4_10.tif" are part of the Image
Processing Toolbox and there s no ne Platform: |
Size: 4096 |
Author:DT丿灬雪狼 |
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Description: 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 range 0-1 enhance contrast of bright
regions, values > 1 enhance contrast in dark
regions.
Peter Kovesi
School of Computer Science & Software Engineering
The University of Western Australia
pk @ csse uwa edu au
http://www.cs.uwa.edu.au/~pk
July 2001
function newim = adjgamma(im, g)
if g <= 0
error( Gamma value must be > 0 )
end
if isa(im, uint8 )
newim = double(im)
else
newim = im
end
rescale range 0-1
newim = newim-min(min(newim))
newim = newim./max(max(newim))
newim = newim.^(1/g) Apply gamma function
Platform: |
Size: 1024 |
Author:kakarot |
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Description: 使用matlab绘制三角函数图像，主要学习坐标范围设置及plot函数-Matlab draw trigonometric image, mainly to study the coordinate range of settings and plot function Platform: |
Size: 1024 |
Author:放飞 |
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Description: 基本遗传算法的MATLAB语言源程序。（遗传算法的应用范围极其广泛，它可应用于函数优化、组合优化、生产调度问题、自动控制、机器人学、图像处理、人工生命、遗传编程以及机器学习等领域。）-Basic genetic algorithm matlb language sourc-e code. (Genetic algorithm extremely broad range of applications, it can be applied to function optimization, combinatorial optimization, production scheduling problem, automatic control, robotics, image processing, artificial life, genetic programming, as well as machine learning and other fields.)
Platform: |
Size: 3072 |
Author:derek |
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Description: 正弦函数，在0到2π区间，当有一个输入时，对应有一个输出，最后在matlab上显示出图像-Sine function, within the range of zero to 2 PI, when have an input, due to an output, and finally show the image in matlab
Platform: |
Size: 8192 |
Author:于浩 |
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Description: 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. Platform: |
Size: 1024 |
Author:lwq |
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Description: 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 Platform: |
Size: 277504 |
Author:wangdong |
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Description: 该资料是汇总了大部分的MATLAB的命令语句，涵盖的面很广，包括常用命令，运算符和逻辑函数，语言结构和调试命令，矩阵和矩阵操作基础，数学函数与坐标变换，数据分析，多项式，双重函数，声音处理，字符串函数，低层文件输入输出函数，位操作结构和对象函数，数组函数，图像可视化函数这些模块。希望对大家学习MATLAB有所帮助。-This information is a summary of most of the MATLAB command statement, surface covers a wide range, including the commonly used commands, operators, and logical functions, language structure and debug commands, matrices and matrix operations based on a mathematical function and coordinate transformation, data analysis, polynomials, dual function, sound processing, string functions, low-level file input and output functions, function-bit operating structures and objects, arrays, functions, image visualization functions for these modules. We hope to learn MATLAB help. Platform: |
Size: 9516032 |
Author:陈明杰 |
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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) Platform: |
Size: 1024 |
Author:潇潇暮雨
|
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Description: This function displays the PSNR (peak signal-to-noise ratio) between two images. The answer is in decibels (dB).
PSNR is very common in image processing. A sample use is in the comparison between an original image and a coded/decoded image. Typical quoted PSNR figures are in the range +25 to +35dB.
The syntax for this file is PSNR(A,B), where A and B are MATLAB Intensity Images, with matrix-elements in the interval [0,1]
The function can be adapted for images with 256 gray levels. Platform: |
Size: 1024 |
Author:yokiqust
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Search - Range Function matlab image