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I have a simple perlin noise function that has the parameters x, y, z, and seed. When I draw the perlin noise to the canvas using the function, the pattern which the perlin noise generates repeats ...
Pete21's user avatar
  • 152
1 vote
1 answer
222 views

I am using awgn() to make a signal 'x' with a given amount of SNR, in this case 10 [line 19]. I am trying to accurately assess the SNR of the signal it creates with my own code, but I am calculating ...
Digit_Fish's user avatar
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1 vote
1 answer
109 views

I'm trying to create procedural textures, and for that, I'm generating noise, and then writing that data to an image file, to be displayed. So far I generated the noise, and now I'm trying to write ...
Chillzy's user avatar
  • 99
1 vote
1 answer
330 views

I will give some context to the function that I wrote: getFractalPointHeight() is a function that is supposed to return the height of the fractal noise based on the coordinates of a Perlin noise image ...
Gabriel's user avatar
  • 75
1 vote
1 answer
1k views

I am using python open cv for image restoration and in the first step, I have to add gaussian noise to my "binary" image. My image pixel values are integers that can take values 0 or 1. How ...
Amir Mohseni's user avatar
  • 13
4 votes
1 answer
720 views

I'm trying to find the theoretical output range of improved Perlin noise for 1, 2 and 3 dimensions. I'm aware of existing answers to this question, but they don't seem to accord with my practical ...
Pepijn Schmitz's user avatar
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2 votes
1 answer
2k views

I have two audio files that I would like to mix in Python. I'll refer to the original audio as "Audio A" and the audio to mix is "Audio B". I am able to add white noise at a ...
Joe's user avatar
  • 405
2 votes
1 answer
1k views

Is there a good way to generate a random point in a 2D plane where the probability of choosing any specific location is based on Perlin Noise? Essentially, when I generate a lot of points using such a ...
puchm's user avatar
  • 167
1 vote
1 answer
118 views

I have a dataframe that is a sine wave with slight noise, and I want to increase the noisiness at only one particular place of the plot. The noise should increase at a certain point before reducing ...
Serena's user avatar
  • 75
0 votes
0 answers
197 views

I watched some tutorials and tried to create a Perlin noise generator in python. It takes in a tuple for the number of vectors in the x and y directions and a scale for the distance in pixels between ...
Red Wizard's user avatar
  • 23
2 votes
0 answers
611 views

I am adding Gaussian Noise using the Keras GaussianNoise layer to my data to corrupt it to prevent overfitting. I have analysed my data and the mean of all values is 7624 and the standard deviation is ...
Harsh Motwani's user avatar
  • 126
3 votes
3 answers
3k views

I'm unsuccessfully trying to generate a 2D array of pink noise. Can anyone explain me how to do this? Otherwise, is there a python library that allows to generate 2D (or higher dimensionality) colored ...
ociredef's user avatar
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1 vote
0 answers
570 views

I'm following this post to generate pink noise with a certain frequency distribution using fourier transforms. I need to be able to give it an image to match the frequencies, and dimensions for the ...
wpwitek's user avatar
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1 vote
3 answers
594 views

When we use mobile or semiprofessional cameras in the room with bad light they increase ISO as a rule, the result is shown below: This is a frame from video, as you can see there is a lot of noise. ...
Denis Steinman's user avatar
  • 7,919
-2 votes
1 answer
811 views

what i want is an uniform and smooth random function, that is bounded beetwen two values the first candidate for smooth random function would be perlin noise, but its distribution is not uniform, as ...
user avatar
1 vote
0 answers
61 views

In an effort to improve my procedural map generation I've been learning more about how generating noise actually works. With that in mind I've been doing a Python adaptation of this tutorial series ...
adaliabooks's user avatar
  • 123
2 votes
1 answer
3k views

I am trying to replicate "Frequency Synthesis of Landscapes" by P. Bourke in Python. I thought it would be a simple import numpy as np from scipy.fft import fft2, ifft2 whitenoise = np....
mosuem's user avatar
  • 110
0 votes
1 answer
632 views

I am trying to add 5 % noise to a measured signal as follows (in MATLAB), but when I calculate percent of noise after addition, it is beyond +/- 5 % . Can you please tell me why this is the case ? ...
parag's user avatar
  • 25
1 vote
1 answer
1k views

I am trying to generate a noisy image as follows: I have figured out how to generate the images with the random noise but can't figure out how to change the noises color. import numpy as np import ...
p.sh's user avatar
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0 votes
2 answers
3k views

There is lots of different implementations of 2D perlin noise in Python. My question is there a simple implementation of perlin noise in Python that fits in 1 function or 1 class? Or maybe there is ...
Somebody's user avatar
  • 195
7 votes
1 answer
3k views

In my current project, I am interested in calculating spatially correlated noise for a large model grid. The noise should be strongly correlated over short distances, and uncorrelated over large ...
J.Galt's user avatar
  • 553
0 votes
1 answer
2k views

I would like to add gaussian noise to images in greyscale based on percentages I'd like to add 5% of any pixel intensity value in the eye area as noise to the whole image, so what i want to do is ...
user avatar
2 votes
3 answers
966 views

I want to carry out some experiments on some time-series data with the KM approach has been suggested in this paper. The problem is I don't access the data in the paper but I have similar type data ...
Mario's user avatar
  • 2,094
0 votes
1 answer
338 views

I wanted to create two random noise signals sampled 2.5G sa/s in frequency range 200kHz - 20Mhz, time of signal 5us and calculate fft of it but I have a problem with fft. Thank you for help, the code ...
Malum Wolfram's user avatar
  • 19
-1 votes
1 answer
697 views

Alright, so I'm working with Swift, and I have GameKit's GKNoise class which allows me to get a noise value given an input. If you graph it you get that standard perlin noise mountain. What I need to ...
theParadox42's user avatar
  • 65
-1 votes
2 answers
94 views

I tried to make a program that generates gradient noise for terrain generation. It's supposed to print array of numbers between 40 and 99 but it stops on this part: for(int k=16; k>1; k/=2) ...
Crimsoon's user avatar
  • 111
1 vote
0 answers
2k views

I'm trying to implement adding Poisson noise to a greyscale image using numpy as a Pytorch transformer but so far my results have been very disappointing. Here are my various implementations with ...
cyril's user avatar
  • 3,023
0 votes
1 answer
338 views

I'm making an image iterator for my deep learning project. On this project, i need to apply noise generation(for reducing overfitting). I tried the code below, but it takes 0.005 seconds for one ...
Frules Club's user avatar
  • 39
-1 votes
1 answer
540 views

I am currently trying to generate a 3D planetary map like No Man's Sky does using the simplex noise plugin in unreal engine blueprints. How can i generate coordinates for the individual planets? I ...
Saphirah's user avatar
  • 23
1 vote
1 answer
232 views

I am trying to learn about Perlin Noise and procedural generation. I am reading through an online tutorial about generating landscapes with noise, but I don't understand part of the author's ...
LuminousNutria's user avatar
  • 2,001
2 votes
2 answers
2k views

I want to create a 2D list of floats with Perlin Noise. I would like the values generated to be different every time I run the program. However, I'm not sure how to provide randomized seeds for the ...
LuminousNutria's user avatar
  • 2,001
0 votes
2 answers
896 views

My question is simple: I have an image and I want to add pixel wise independent noise to the image. The noise can be derived from from any distribution such as Gaussian. What are the available modules ...
Silver moon's user avatar
  • 229
0 votes
1 answer
367 views

At this page, and in the docs for p5.js, Perlin noise is described as having an output range of [0,1], but all other implementations I've found have a small range symmetric about 0, and it seems that ...
failedentertainment's user avatar
  • 282
0 votes
1 answer
180 views

I have a function that returns a bounded noise. For example, let's imagine that out input range is [-1, 1]. With my method I can return a bounded/in range noise (depending on the biome we are ...
z3nth10n's user avatar
  • 2,451
0 votes
1 answer
587 views

I have a greyscale volume that contains an object of interest. I can import it into python as a three dimensional numpy array with floats between -1 and 1. My issues are twofold: the negative floats ...
user avatar
0 votes
1 answer
1k views

So I am currently working on a perlin noise generator, for some reason I'm getting incorrect output: The perlin noise is in a "grid" and does not resemble traditional perlin noise. Here is my code: ...
Drew Cutchins's user avatar
  • 16
1 vote
0 answers
85 views

I am a total newbie in signal processing. I have been trying to plot on simulink a time/frequency domain noise in PLC (Powerline Communication) modem that matches a real-world research, however, I ...
Sam Al-Ghammari's user avatar
  • 1,021
1 vote
1 answer
528 views

I can create pink,brown,blue audio noise with the following snippet code by selecting a different invfnorm variable to use below, but how can I create grey noise? %https://en.wikipedia.org/wiki/...
Rick T's user avatar
  • 3,419
3 votes
1 answer
4k views

I've picked up a project that creates a noise map using setPixel(). The majority of the runtime of this application is spent within the setPixel() function so I was looking to increase the speed at ...
EMoore's user avatar
  • 33
7 votes
2 answers
336 views

Last weeks I was developing a world generator (for a Minecraft mod). However, I wasn't looking for just Perlin noise, but rather something based on cell noise. I want to generate a sort of underground ...
Samū's user avatar
  • 518
2 votes
1 answer
1k views

I am totally new to python, so I tried to read and learn what I could but I cannot seem to do what I want, and I haven't found a solution on Stack Overflow or other sources. My aim is to create a wave ...
Pyxel's user avatar
  • 137
0 votes
1 answer
743 views

I want to create a web-based demonstration of differential privacy. To do this, I need a JavaScript implementation of the Laplace noise distribution. I've been unable to find basic noise ...
vy32's user avatar
  • 30.1k
2 votes
0 answers
1k views

I need to create a signal (a multidimensional array) and add some "additive Laplace noise" to it. Then, I want to be able to measure the SNR level of the resulting signal (in dB units). If there is ...
php-junkie's user avatar
  • 107
0 votes
1 answer
527 views

I came across this 2D noise function in the Book of Shaders float noise(vec2 st) { vec2 integerPart = floor(st); vec2 fractionalPart = fract(st); float s00 = random(integerPart); float s01 = ...
user avatar
3 votes
0 answers
461 views

I've started learning about perlin noise generation, and I wanted to try to make my own generator in JavaScript. To get me started, I've been following along with this youtube tutorial. to try and ...
MWinstead's user avatar
  • 1,315
1 vote
1 answer
910 views

I read the very interesting and informative article on image noise located here: http://www.cambridgeincolour.com/tutorials/image-noise-2.htm One of the key points is noise frequency which can be ...
Rich95's user avatar
  • 345
0 votes
0 answers
426 views

I am trying to understand and create my own poisson noise generator. I am following the code example seen here: https://imagej.nih.gov/ij/plugins/download/Poisson_Noise.java It produces poisson noise ...
Rich95's user avatar
  • 345
0 votes
1 answer
1k views

So I have been doing a bit of research into how Perlin and Simplex noise work and, while I get the core principles of regular Perlin noise I'm a little bit confused about how the permutation and ...
Toemouse's user avatar
  • 40
0 votes
0 answers
2k views

i want to create white noise random numbers. I thought that white noise is gaussian distribution and i used the following code for number generation: normal_distribution distribution where mu is ...
Constantinus Spanakis's user avatar
  • 29
1 vote
1 answer
2k views

I am trying to use the libnoise library, which is a c++ library for perlin noise generation, in Visual Studio 2013. Tutorial 3 links to an addon utility called noiseutils, which consists of a .cpp and ...
ViggyNash's user avatar
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