How to replace image pixels
32 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I have an image and a csv file. I want to change the pixel value of the image to the values in the csv file. How do I do that?
1 commentaire
Adam
le 5 Août 2019
Load the image, load the csv file, index into the image and replace values. Write the image to file again if desired.
Réponses (1)
Image Analyst
le 5 Août 2019
Try this if your data is stored row, column, new gray level:
data = csvread(filename); % Assumes columns of row, column, new gray level, NOT x, y, new gray level
rows = data(:, 1);
columns = data(:, 2);
newValues = data(:, 3);
for k = 1 : length(rows)
grayImage(rows(k), columns(k)) = newValues(k); % Replace this pixel of grayImage with a new value.
end
If your data is in the form x, y, gray level, you need to do this:
data = csvread(filename); % Assumes columns of x, y, new gray level, NOT row, column, new gray level
rows = data(:, 2);
columns = data(:, 1);
newValues = data(:, 3);
for k = 1 : length(rows)
grayImage(rows(k), columns(k)) = newValues(k); % Replace this pixel of grayImage with a new value.
end
0 commentaires
Voir également
Catégories
En savoir plus sur Get Started with Image Processing Toolbox dans Help Center et File Exchange
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!