How to filter an histogram with gaussian low pass filter ?
8 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
MMSAAH
il 18 Dic 2017
Commentato: Image Analyst
il 20 Dic 2017
I have MR slice of type double, I want to filter its histogram to smooth it using Gaussian Low Pass Filter. I know that the (imgaussfilt ) filter the image with a Gaussian filter but we need the standard deviation. Could any one tell me how to fix the value of the standart deviation ? is it the (std2) of the whole image ? Otherwise, if you have you any other prepositions, I will be greatful.
4 Commenti
Jan
il 19 Dic 2017
What is the final result? A modified histogram or do you want to modify the image, such that the histogram of the modified image is smoother?
Risposta accettata
Image Analyst
il 19 Dic 2017
Just take the histogram counts and use conv() to smooth
windowSize = 15; % Adjust to control level of smoothing.
smoothedCounts = conv(counts(:), ones(windowSize, 1)/windowSize, 'same');
2 Commenti
Image Analyst
il 20 Dic 2017
What does "fix" mean. It IS a constant, "fixed" value, so do you have a different definition? I picked 15 arbitrarily, but like I said, you can pick different values to make the histogram smoother or less smooth (more like the original). There is not one, "right" value. It's totally up to you how much you want to smooth it.
Perhaps you'd like to use the MATLAB smoothed histogram that you get with fitdist(), if you have the Statistics and Machine Learning Toolbox.
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Histograms in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!