Description: （1）获得图象的直方图，将其均衡化，显示灰度变换函数及图象效果；
（2）分别用梯度法、拉氏算子、Sobel算子以及中值过滤等方法对图象进行增强，并对增强效果进行比较；
（3）用钝化算子、高频提升、内查、外推等方法对图象进行增强。
（4）用Matlab工具进行彩色图象增强方法和彩色图象处理方法的实验-(1) to obtain images of the histogram equalization to show gray-scale transformation function and image results (2), respectively, with gradient method, Laplace operator, Sobel operator and the value of filters and other methods of image to strengthen and enhance the effectiveness of comparison (3) passivation operator, high-frequency enhancement in the investigation, the extrapolation methods of image enhancement. (4) using Matlab tools color image enhancement and color image processing method of experiment Platform: |
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Author:杨怡 |
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Description: 该代码的功能主要是识别数字。采用的算法是建立人工神经网络的模型，通过对样本的训练而保存全权值（及数字的特征），训练结束后能识别图片上的数字（256位色），相信对于研究神经网络模型的很有帮助，同时该代码还涉及到图像处理部分的内容，比如二值化，梯度锐化，去噪声等算法。-The main function is to identify the code number. The algorithm used is based on artificial neural network model, through training and save the full sample values (and the number of features), training to recognize the picture after the number (256-bit color), I believe that neural network model for the study was helpful, while the code is also involved in image processing part of the contents, such as binary, gradient sharpening algorithms to noise. Platform: |
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Author:沈晓伟 |
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Description: 本人精心整理的VB程序开发的平面图像处理软件，最初为国外的一个功能较全的图像程序，经过本人汉化，修改，功能得到极大扩展。内容包括各种滤镜，绘图、ico图标生成，图形特效，分型图案，莫尔图案，摩尔图案，美丽图案，渐变色，图像翻转，旋转，Alpha混合，图像显隐特效，不同大小的ico图标绘制简单动画演示，图形打开和保存等等，支持jpg、bmp、gif、wmf等格式。几年的图像处理程序收藏精华全在这儿了！希望对大家的学习有所帮助。-I carefully finishing plane image processing software, initially for a foreign function over the entire image program, and after I finished, the modified features have been greatly expanded. Include a variety of filters, drawing, ico icon generates graphical effects, typing patterns, moire patterns, the moiré pattern, beautiful pattern, gradient, image flip, rotate, Alpha mixed, the image explicit and implicit effects, different size of the ico icon to draw a simple animation, graphics, open and save, support jpg, bmp, gif, wmf format. Years of image processing procedures Favorite essence all in here! I hope to help everyone learn. Platform: |
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Author:xft |
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Description: GDI+：Graphics Device Interface (图形设备接口)，它提
供了高级图形图像处理功能
在C#中，通过一套部署为托管代码的类来展现提供的图
形图像处理功能，这套类被称为GDI+的托管类。利用
GDI+可以轻松实现颜色渐变、透明处理、纹理处理、拉
伸和缩放等多种高级功能。
GDI+主要提供了三类服务：
1.二维矢量图形
2.图像处理
3.文字显示
-GDI+: Graphics Device Interface (Graphics Device Interface), which provides advanced graphics image processing function to show graphics image processing function provided by a deployment of managed code classes in C#, set class is called GDI+ Managed classes. Using GDI+ can easily achieve color gradient, transparent processing, texture processing, stretching and scaling and other advanced features. The GDI+ provide three types of services: 1 two-dimensional vector graphics image processing 3. Text Platform: |
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Author:姚樊 |
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Description: MATLAB图像处理源程序3：程序代码说明
P0301：数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
P0307：采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
P0308：图像的自适应魏纳滤波
P0309：运用5种不同的梯度增强法进行图像锐化
P0310：图像的高通滤波和掩模处理
P0311：利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理
P0312：利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理-MATLAB image processing source code 3: Procedure Code Description P0301: digital image data matrix display and Fourier Transform P0302: two-dimensional discrete cosine transform image compression P0303: using gray transform method to enhance the contrast of the image P0304: histogram equalization P0305: Simulation images by white Gaussian noise and Impulse noise impact P0306: 2D median filtering of function medfilt2 on the Salt and Pepper noise image filtering P0307: MATLAB functions filter2 mean filtering the noise in the image P0308: Image Adaptive Filter Weiner P0309: use five different gradient Enhancement Act for image sharpening P0310: the image of the high-pass filtering and mask handling P0311: use Butterworth (Butterworth) low-pass filter on the noise in the image smoothed P0312: use Butterworth (Butterworth) high-pass filter for image sharpening Platform: |
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Author:木子 |
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Description: The Prewitt operator is used in image processing, particularly within edge detection algorithms. Technically, it is a discrete differentiation operator, computing an approximation of the gradient of the image intensity function. At each point in the image, the result of the Prewitt operator is either the corresponding gradient vector or the norm of this vector. The Prewitt operator is based on convolving the image with a small, separable, and integer valued filter in horizontal and vertical directions and is therefore relatively inexpensive in terms of computations. On the other hand, the gradient approximation which it produces is relatively crude, in particular for high frequency variations in the image. The Prewitt operator was developed by Judith M. S. Prewitt. Platform: |
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Author:ali |
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Description: P0301：数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
P0307：采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
P0308：图像的自适应魏纳滤波
P0309：运用5种不同的梯度增强法进行图像锐化
P0310：图像的高通滤波和掩模处理
P0311：利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理
P0312：利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理-P0301: digital image display and its Fourier transform matrix data
P0302: two-dimensional discrete cosine transform in image compression
P0303: adopt the method of gray transform to enhance the image contrast
P0304: histogram equalization
P0305: simulated images affected by white gaussian noise and salt and pepper noise
P0306: adopting the two-dimensional median filtering function medfilt2 for the salt and pepper noise image filtering
P0307: using MATLAB functions in filter2 to average filtering the noise of the image
P0308: adaptive weiner filtering of the image
P0309: using five different gradient enhancement method of image sharpening
P0310: image high-pass filtering and mask processing
P0311: using Butterworth low-pass filter (Butterworth) for the noise of image smoothing
P0312: using Butterworth, Butterworth high-pass filter to sharpen the image
Platform: |
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Author:Alley |
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Description: 索贝尔算子(Sobel operator)是图像处理中的算子之一，主要用作边缘检测。在技术上，它是一离散性差分算子，用来运算图像亮度函数的梯度之近似值。在图像的任何一点使用此算子，将会产生对应的梯度矢量或是其法矢量
Sobel算子有两个，一个是检测水平边沿的；另一个是检测垂直平边沿的。Sobel算子另一种形式是各向同性Sobel (Isotropic Sobel)算子，也有两个，一个是检测水平边沿的，另一个是检测垂直边沿的各向同性Sobel算子和普通Sobel算子相比，它的位置加权系数更为准确，在检测不同方向的边沿时梯度的幅度一致。由于建筑物图像的特殊性，我们可以发现，处理该类型图像轮廓时，并不需要对梯度方向进行运算，所以程序并没有给出各向同性Sobel算子的处理方法。由于Sobel算子是滤波算子的形式，用于提取边缘，可以利用快速卷积函数，简单有效，因此应用广泛。
-Sobel operator (Sobel operator) operator is one of image processing, mainly for edge detection. Technically, it is a discrete difference operator for the operation gradient approximation image brightness function. At any point using this image operator, will have its corresponding gradient vector or vector method Sobel operator has two, one is to detect the horizontal edge the other is to detect vertical flat edge. Sobel operator is another form of isotropic Sobel (Isotropic Sobel) operator, there are two, one is to detect the horizontal edge, and the other vertical edge detection isotropic Sobel operator Sobel operator and ordinary compared to its location more accurate weighting factor, consistent detect edges in different directions when the magnitude of the gradient. Due to the special nature of the building of the image, we can see that, when dealing with this type of image contour, gradient direction does not need to be operational, so the program does not give an isotropic Sobe Platform: |
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Author:林晓冬 |
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Description: 边缘检测算子
图像边缘信息主要集中在高频段，通常说图像锐化或检测边缘，实质就是高频滤波。我们知道微分运算是求信号的变化率，具有加强高频分量的作用。在空域运算中来说，对图像的锐化就是计算微分。由于数字图像的离散信号，微分运算就变成计算差分或梯度。图像处理中有多种边缘检测（梯度）算子，常用的包括普通一阶差分，Robert算子（交叉差分），Sobel算子等等，是基于寻找梯度强度。拉普拉斯算子（二阶差分）是基于过零点检测。通过计算梯度，设置阀值，得到边缘图像。(The image edge information is mainly concentrated in the high frequency section, usually the image sharpening or detecting the edge, the essence is the high frequency filtering. We know that differential operation is the change rate of the signal, and it has the function of strengthening the high frequency component. In the space operation, the sharpening of the image is the calculation of differential. Because of the discrete signal of the digital image, the differential operation becomes the difference or the gradient. There are many edge detection (gradient) operators in image processing, which usually include ordinary first order difference, Robert operator (cross difference), Sobel operator and so on, which are based on finding gradient intensity. The Laplasse operator (two order difference) is based on the zero crossing point detection. By calculating the gradient, the threshold is set to get the edge image.) Platform: |
Size: 22621184 |
Author:lohaspig |
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Search - gradient function in image processing