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Gabor-function convolution masks are increasingly used in image processing and computer vision. This function simply computes the cosine and sine masks for a given width, period and orientation. The masks returned are properly normalised.
It is
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指南针边缘检测算法是当前质量最高的边缘检测方法，比CANNY算子效果还要好。具有边缘定位准确，边连续，完整的特点。程序能够得到每一个像素的边的朝向，有利于做进一步的优化应用，例如图像分割等。具体算法过程可参考斯坦福大学麦克博士发表的论文。主要思路就是以每个像素为中心，像罗盘一样转动边，一直找到两边差异最大的朝向。最后把所有的最优朝向连起来成为边缘。
代码用VC驱动，核心部分用matlab编写-Compass edge detection algorithm is currently the
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边缘特征的提取就是求图像梯度的局部最大值和方向。实际计算中，以微分算子的形式表示，并采用快速卷积函数来实现。常用的算子有微分算子，拉普拉斯算子，Canny算子等。其中Canny边缘检测是一种较新的边缘检测算子，具有较好的边缘检测性能，得到越来越广泛的应用。Canny边缘检测法利用高斯函数的一阶微分，它能在噪声抑制和边缘检测之间取得较好的平衡-Edge feature extraction is to seek the local maximum of image gradient and ori
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This function computes 1st and 2nd derivatives of an image using the 7-tap
coefficients given by Farid and Simoncelli. The results are significantly
more accurate than MATLAB s GRADIENT function on edges that are at angles
other than vertic
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指纹增强的matlab实现源代码，包含多个matlab函数文件。-ridgesegment.m identifies ridge-like regions of a fingerprint image. It also normalises the intensity values of the image.
ridgeorient.m estimates the local orientation of ridges in a fingerprint.
plotridgeorient.
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This a MATLAB implementation of the SIFT keypoint detector and descr iptor -do_gaussian: generate Gaussian scale space of input image
do_diffofg: generate Difference of Gaussian (DoG) scale space
do_localmax: local extrema as the potential keyp
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基于matlab的对易拉罐底字符的定位与辨识，使用了图像滤波，分割，定位，模式匹配等技术-Based on MATLAB the cans at the end of the character of localization and identification, the use of the image filtering, segmentation, orientation, mode matching technology
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摄影测量中的空间前方交会程序，采用的是matlab编写的点投影系数法和共线条件方程法，结合空间后方交会求解的双像外方位元素，可以进行待定点的三维坐标的求解。(The program of space intersection in photogrammetry, using the projection coefficient method and collinear equation method to prepare the MATLAB, combined with the space r
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利用已知控制点，通过空间后方交会求得像片的外方位元素，并利用求得的外方位元素，通过前方交会求出像点的地面摄影测量坐标，并判断外方位元素的精度是否达标。(By using the known control points, the exterior orientation elements of the photo are obtained through the space resection. The ground photogrammetric coordinates of the imag
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