Description: 这是一基于MATLAB的复调制ZOOM-FFT的研究和实现的一篇文章，为的是提高频率分辨率。-This is a MATLAB-based complex modulation ZOOM- FFT Research and Implementation of an article, To improve the frequency resolution. Platform: |
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Author:陶陶 |
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Description: 图象的插值缩放
图象的插值旋转
图象的剪切
在图象的几种几何操作中，图象的缩放和旋转都要用到插值操作。插值算法的好坏直接关系到图象的失真程度，插值函数的设计是插值算法的核心问题。因此，在具体介绍这几种几何操作前，有必要先介绍一下插值的基本原理。
-image interpolation zoom image interpolation rotary shear image in the image of several geometric operation, image scaling and rotation should be used interpolation operation. Interpolation algorithm directly related to the distortion of images, interpolation function interpolation algorithm design is the core of the problem. Therefore, the specific details of these types of geometric pre-operational, it is necessary to first explain the basic tenets of interpolation. Platform: |
Size: 3072 |
Author:深蓝 |
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Description: 用matlab实现了彩色图像的缩放，采用的是双线性插值算法！-Matlab achieved using the zoom color images, using bilinear interpolation algorithm! Platform: |
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Author:张成峰 |
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Description: 双线性插值图像放大/缩小算法源程序。里面还包含了 Image 基本类及其基本操作，可供许多图像处理程序使用。-Bilinear interpolation image zoom in/out source algorithm. Which also contains the basic type of Image and its basic operation for many image processing programs. Platform: |
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Author:breathomn |
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Description: 1 SIFT 发展历程
SIFT算法由D.G.Lowe 1999年提出，2004年完善总结。后来Y.Ke将其描述子部分用PCA代替直方图的方式，对其进行改进。
2 SIFT 主要思想
SIFT算法是一种提取局部特征的算法，在尺度空间寻找极值点，提取位置，尺度，旋转不变量。
3 SIFT算法的主要特点：
a) SIFT特征是图像的局部特征，其对旋转、尺度缩放、亮度变化保持不变性，对视角变化、仿射变换、噪声也保持一定程度的稳定性。
b) 独特性(Distinctiveness)好，信息量丰富，适用于在海量特征数据库中进行快速、准确的匹配[23]。
c) 多量性，即使少数的几个物体也可以产生大量SIFT特征向量。
d) 高速性，经优化的SIFT匹配算法甚至可以达到实时的要求。
e) 可扩展性，可以很方便的与其他形式的特征向量进行联合。
4 SIFT算法步骤：
1） 检测尺度空间极值点
2） 精确定位极值点
3） 为每个关键点指定方向参数
4） 关键点描述子的生成
本包内容为sift算法matlab源码-1 SIFT course of development
SIFT algorithm by DGLowe in 1999, the perfect summary of 2004. Later Y.Ke its description of the sub-part of the histogram with PCA instead of its improvement.
2 the SIFT main idea
The SIFT algorithm is an algorithm to extract local features in scale space to find the extreme point of the extraction location, scale, rotation invariant.
3 the main features of the SIFT algorithm:
a) SIFT feature is the local characteristics of the image, zoom, rotate, scale, brightness change to maintain invariance, the perspective changes, affine transformation, the noise also maintain a certain degree of stability.
b) unique (Distinctiveness), informative, and mass characteristics database for fast, accurate matching [23].
c) large amounts, even if a handful of objects can also produce a large number of SIFT feature vectors.
d) high-speed and optimized SIFT matching algorithm can even achieve real-time requirements.
e) The scalability can be very convenient fe Platform: |
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Author:李青彦 |
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Description: 基于MATLAB的图像处理的基本运算
（1）能够对图像亮度和对比度变化调整，并比较结果
（2）编写程序通过最近邻插值和双线性插值等算法将用户所选取的图像区域进行放大和缩小整数倍的和旋转操作，并保存，比较几种插值的效果
（3）图像直方图统计和直方图均衡，要求显示直方图统计，比较直方图均衡后的效果。
（4）对图像加入各种噪声，比较效果。
-Adjustment of image brightness and contrast changes, and compare the results based on MATLAB image processing operations (1) (2) to program the image area selected by the user to zoom in and out through the nearest neighbor interpolation and bilinear interpolation algorithm integer multiples and the rotary operation, and save, compare several interpolation image histogram and histogram equalization of the effect (3), required to display the histogram, comparative histogram after equalization effect. (4) adding a variety of noise on the image, comparing the effect. Platform: |
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Author:苏琴 |
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Description: 一篇基于ＰＤＥ方法的zoomｉｎｇ算法的论文及其ｍａｔｌａｂ实现。-An algorithm based on the PDE zoom papers and Matlab. Platform: |
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Author:yinyanwuai |
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Description: 利用matlab的GUI程序设计一个简单实用的图像处理程序。该程序应具备图像处理的常用功能，以满足用户的使用。现设计程序有以下基本功能：
1）图像的读取和保存。
2）设计图形用户界面，让用户能够对图像进行任意的亮度和对比度变化调整，显示和对比变换前后的图像。
3）设计图形用户界面，让用户能够用鼠标选取图像感兴趣区域，显示和保存该选择区域。
4）编写程序通过最近邻插值和双线性插值等算法将用户所选取的图像区域进行放大和缩小整数倍的操作，并保存，比较几种插值的效果。
5）图像直方图统计和直方图均衡，要求显示直方图统计，比较直方图均衡后的效果。
6）能对图像加入各种噪声，并通过几种滤波算法实现去噪并显示结果。
7）额外功能。
-Using matlab GUI program to design a simple and practical image processing program. The program should have a common image processing capabilities to meet user. Programs are designed to have the following basic functions:
1) read and save the image.
2) design of graphical user interface, allowing users to be able to image any changes to adjust brightness and contrast, display, and transform images before and after contrast.
3) design of graphical user interface that enables users to use the mouse to select a region of interest image, display and save the selection area.
4) Write a program through the nearest neighbor interpolation and bilinear interpolation algorithm selected by the user to zoom in and zoom out image areas integer multiple of the operation, and save, compare several interpolation results.
5) image histogram and histogram equalization, histogram display required to compare the effect after histogram equalization.
6) can add a variety of image noise, and through se Platform: |
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Author:朱孝天 |
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Description: 能够进行简单的频率计算，通过输入一个模拟信号没能够用MATLAB计算出相应的信号频率，算法的计算量小，文档完整，文档的附录是MATLAB程序，可以直接在MATLAB中使用(To calculate the simple frequency, through the input of an analog signal can not calculate the signal frequency with corresponding MATLAB algorithm, small amount of calculation, document integrity, document appendix is MATLAB procedures, can be directly used in MATLAB) Platform: |
Size: 66560 |
Author:作业狗
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Description: 基于MATLAB复调制ZOOM-FFT算法的分析和实现(Analysis and implementation of complex modulation ZOOM-FFT algorithm based on MATLAB) Platform: |
Size: 124928 |
Author:随风飞翔8023
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Description: 基于fpga的vga显示，芯片：EP4CE6F17C8(Analysis and implementation of complex modulation ZOOM-FFT algorithm based on MATLAB) Platform: |
Size: 5918720 |
Author:ys95
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Search - zoom matlab algorithm