Average of the nine surrounding cells
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I have two matrices, matrix1 contains genuine data and matrix2 is filled with 0's and a few 1's, i wanted to know if there is a way to calculate the average of all 9 cells surrounding the cell with the 1 in the matrix with the genuine data. i.e when a 1 is spotted in matrix2 then the average of the 9 surrounding cells to the corresponsinding cell in matrix1 is calculated.
Im not sure if this is clear
0 commentaires
Réponse acceptée
Stephen23
le 29 Mai 2020
Modifié(e) : Stephen23
le 29 Mai 2020
out = matrix2.*conv2(matrix1,ones(3,3),'same')/9;
2 commentaires
Stephen23
le 29 Mai 2020
Instead of dividing by 9 you could divide by a matrix of the same size, where each element's value gives the number that you want to divide by. Also note that the corners have 4, the sides 6, and the middle 9:
D = ones(size(matrix1))*6;
D(2:end-1,2:end-1) = 9;
D([1,end],[1,end]) = 4;
out = matrix2.*conv2(matrix1,ones(3,3),'same')./D;
Or if you have the image toolbox you could just use blockproc:
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Resizing and Reshaping Matrices dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!