# Questions tagged [gaussian-kernel]

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### Comparing two sequences of events for similarity

Suppose I have two sequences of unequal lengths whose elements are timestamps of discrete events in milliseconds: $S_1 = \{150, 200, 700, 1300, 2500\}$, $S_2 = \{300, 670, 900, 1300\}$. These ...
18 views

### GMSK Modulator Large sample Buffer size and high Bandwidth

I found good answers to my queries here Gaussian Pulse shaping filter and suggestion for NCO based GMSK modulator seems to be undersstandable. Thanks to Dan Boschen , but when moving ahead to design ...
93 views

### Gaussian Pulse shaping filter

I need expert advice on implementation of Gaussian Pulse Shaping filter for generating GMSK signal in further steps. I have implemented as follows, Can anyone confirm that the Pulse would be shaped as ...
3k views

### Appropriate Gaussian filter parameters when resizing image

When scaling an image down it is common to first convolve the image with a Gaussian filter. Given a scale factor $0 < s < 1,$ what is an appropriate $\sigma$ to use? For example, if $s = 0.5$ (...
1 vote
65 views

### Best large gaussian filter for current SIMD instruction sets?

I'd like to make a faster version of the Gaussian blur for Inkscape. Here's what I found various open source projects use: librsvg: 3 box blurs when stdev > 2. Else, separable FIR filter. Krita:  ...
23 views

### Confusion with Complex Gaussian process with Auto-covariance

I have a complex sequence $z(t)$ in time which I know to be a Gaussian process. I read that the complex Gaussian process is not only characterized by the covariance, but also the pseudo-covariance ...
1 vote
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1 vote
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### Rolling sum of dataframe with custom function gets really slow on large averaging windows. Can I fix with convolve?

I am using the following function to estimate the Gaussian window rolling average of my timeseries. Though it works great from small size averaging windows, it crushes (or gets extremely slow) for ...
1 vote
247 views

### How to upscale an image using a Gaussian filter in R?

I want to resample a raster from 15m to 460m using a Gaussian filter. The goal I am having a coarse image which I want to downscale. I also have a fine resolution band to assist the downscaling. The ...
340 views

### What is the outcome of applying a derivative on X and Y for an image? and Other Gaussian Questions

I've been diving into smoothing kernels and I came up with a lot of questions that I haven't been able to find in the internet. If you can I'd appreciate the help :) (Capitals and bold were used for ...
899 views

5k views

### PYTHON Calculating Laplacian of Gaussian Kernel Matrix

I've been trying to create a LoG kernel for various sigma values. But the problem is that I always get float value matrix and I need integer value matrix as it is published on every document. I haven'...
1 vote