How to flip my image
146 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Jesse Schultz
le 21 Août 2019
Commenté : Jesse Schultz
le 21 Août 2019
I have an image that I must flip using a nested for loop to flip the image vertically and horizontally, I have written a code that I think works but there is something wrong with it that it isn't. What have I done wrong?
%make 2d arrays values
imageData=imread('image.png');
[row, column] =size(imageData)
newImage=[]
%Use nested loops to change image mirrored
for i=[row:-1:1];
for j=[column:-1:1];
transposedMatrix(column, row) = imageData(i,j);
transposedMatrix
end
end
imshow(transposedMatrix)
5 commentaires
Adam
le 21 Août 2019
Well, a flip instruction would be more like exchanging position i with row - i and j with column - j
Réponse acceptée
Joel Handy
le 21 Août 2019
Modifié(e) : Joel Handy
le 21 Août 2019
The are a few problems with your code. First, if you want the image, you dont want to transpose. That will flip and rotate, As adam has pointed out, column and row, you arent actuall transposing anyway. A better and correct way to transpose is to use permute.
imageData=imread('image.png');
newImage = permute(imageData, [2 1 3]);
imshow(newImage);
To actually flip, you should be able to use the flip function
imageData=imread('image.png');
newImage = flip(imageData,1);
newImage = flip(newImage,2);
imshow(newImage);
3 commentaires
Joel Handy
le 21 Août 2019
I that case . . .
%make 2d arrays values
imageData=imread('image.png');
[row, column] = size(imageData);
%Use nested loops to change image mirrored
for i=[1:row]
for j=[1:column]
newImage((row-i)+1, (column-j)+1) = imageData(i,j);
end
end
imshow(newImage)
You dont want to transpose rows and colums, you want to flip the the indexes within rows and columns.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Loops and Conditional Statements 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!