convolution

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Image Convolution in Frequency Domain (MATLAB)

I\'m writing a c++ program for a class to do convolution in the frequency domain, and I noticed the final result had error along the corner. So I tried it out in MATLAB and got the exact same results.[详细]

2023-04-10 01:15 分类：问答
How to process 3d gaussian convolution with a 3d array or matrix in OpenCV

I have a 3d array like this. int sz[] = {240, 240, 240}; Mat accumarray(3, sz, CV_32S, Scalar::all(0)) ;[详细]

2023-03-31 23:22 分类：问答
1D Fast Convolution without FFT

I need an 1D Convolution against 2 big arrays. I\'m using this code in C# but it takes a loooong time to run.[详细]

2023-03-31 10:06 分类：问答
Gaussian Blur with FFT Questions

I have a current implementation of Gaussian Blur using regular convolution. It is efficient enough for small kernels, but once the kernels size gets a little bigger, the performance takes a hit. So, I[详细]

2023-03-28 05:34 分类：问答
FFT Convolution - How to apply Kernel

I\'m pretty new to Image Processing and found out that the FFT convolution speeds up the convolution with large kernel sizes a lot.[详细]

2023-03-26 17:50 分类：问答
Convolution computations in Numpy/Scipy

Profiling some computational work I\'m doing showed me that one bottleneck in my program was a function that basically did this (np is numpy, sp is scipy):[详细]

2023-03-23 06:09 分类：问答
Using a Roberts operator on an image

This algorithm is meant to apply a Roberts operator to an image, and store the result in a new file. Instead, this code outputs the exact same image as the input.[详细]

2023-03-19 04:27 分类：问答
Finding the convolution of two histograms

The probability distribution of the sum of two random variables, x and y, is given by the convolution of the individual distributions. I\'m having some trouble doing this numerically. In the following[详细]

2023-03-16 12:41 分类：问答
Applying a bank of image filters in Matlab

I need to filter an image using a bank of filters in Matlab.My first attempt was to use a开发者_如何转开发 simple for loop to repeatedly call the \"imfilter\" function for each filter in the bank.[详细]

2023-03-13 04:36 分类：问答
How can I determine if my convolution is separable?

What makes a convolution kernel separable? Ho开发者_StackOverfloww would I be able to tell what those separable parts were in order to do two 1D convolutions instead of a 2D convolution>[详细]

2023-03-03 10:53 分类：问答