All Questions
12
questions
0
votes
1
answer
526
views
Image color-moment extractor [closed]
I was just wondering if there is a way to speed up the performances of this for loops in Python.
I'm trying to process an image to get the color-moments without using libraries.
It takes about 12sec ...
- 11
2
votes
0
answers
116
views
Extract cell values from multiband rasters
I have the following function and code snippet to extract cell values for multiple years, format it, and save to a list. Each raster has 365 bands — one for each day. A separate operation is performed ...
- 121
5
votes
1
answer
1k
views
Improving the speed of creation for three Perlin Noise Maps in Python?
I am interested in learning how I can improve the speed of the code in this pygame file. I iterate over 6400 * 1800 * 3 or 34,560,000 elements of various numpy arrays here to apply noise values to ...
- 421
7
votes
1
answer
1k
views
Plotting terrain pixels with PyGame based on random NumPy array
I am experimenting with Perlin Noise and random map generation. I have a 2D numpy ndarray full of 16-bit floats called map_list that I call from the singleton ...
- 421
3
votes
2
answers
4k
views
Calculate True Positive, False Positive, True Negative and False negative and colourize output
Objective : Calculate True Positive, False Positive, True Negative and False negative and colourize the image accordignly, based on ground-truth and prediction from my classifier model.
Problem : ...
user108668
4
votes
1
answer
334
views
Surface Density Profile
I am trying to compute the surface density profile, given the spherical density profile in 3D for different parameters in order to interpolate and have it as a function of them to use later on for ...
- 53
9
votes
1
answer
4k
views
Optimizing a python script with large arrays
I have a python script that I'd like to speed up. I'm hoping some of the gurus here can offer some advice.
The script reads in some data from file: 2 arrays with lat/lon vals, 3 arrays with image ...
- 201
2
votes
1
answer
776
views
Benchmark using floating point math
I wrote some code in Python, to benchmark mathematical operations. It does not do anything in particular besides just calculating a lot of floating point numbers.
To clarify: I need 128-bits ...
- 43
1
vote
2
answers
273
views
Sieve of Erathosthenes speedup
While reading HackerNews, I learned about a data set of the first 50 million primes. This would be a lot, but his website has disclaimer:
n this directory I have the first fifty million primes in ...
- 242
3
votes
2
answers
724
views
Reduction function in Rainbow tables implementation
I'm working on an implementation of Rainbow tables as part of a project. I understand the main principles behind it had have a working solution. Unfortunately the reduction function portion of my ...
- 131
3
votes
1
answer
7k
views
Fast loop to create an array of values [closed]
I have a code that creates a 3D array of values from a minimum to a maximum in X and Z with constant Y.
Right now I make it in normal Python, and then I transform it in a ...
- 475
14
votes
1
answer
10k
views
Faster computation of barycentric coordinates for many points
I'm just starting to understand the Python syntax and I created a module that does what I wanted, but really slow.
Here are the stats of cProfile, top 10 ordered by ...
- 475