I give you code generate edge detection an image processing using Laplacian of Gaussian algorithm which based on kernel matrix. it is not used matlab toolbox but handmade. so feel free to use it.-I give you code generate edge detection on an image

matlab对一幅图像利用小波实现边缘检测，并和其他的算子（拉普拉斯算子、梯度算子）比较结果-Comparison of the results of matlab for an image using wavelet edge detection, and other operators (Laplacian, gradient operator)

实用的matlab代码：中值滤波器；用Sobel算子和拉普拉斯对图像锐化；梯度算子检测边缘；LOG算子检测边缘；Canny算子检测边缘-Practical matlab code: median filter Sobel operator and Laplacian image sharpening gradient edge detection operator LOG operator to detect the edges Canny edge detection operator