How to crop an image around certain xy coordinates?
9 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Isaiah Stefan Engle
le 27 Fév 2017
Commenté : Image Analyst
le 27 Fév 2017
This may be a simple question but I am extremely new to Matlab and coding in general. I have the coordinates of a circle's center by using the imfindcircles function. I want to be able to find the total pixel value of a 25x25 pixel box around the given coordinates. I'm not really sure how this can be done at all. Is there a way to plot such a box around a given xy coordinates? Thank you in advance!
0 commentaires
Réponse acceptée
Walter Roberson
le 27 Fév 2017
Given x and y as integers, then
cropped = YourArray(y - 12 : y + 12, x - 12 : x + 12, :);
Assuming that the x and y are not within 12 of the edge of the image.
After that it depends what you mean by "total pixel value". You might mean
sum(cropped(:))
or you might mean
nnz(cropped)
1 commentaire
Image Analyst
le 27 Fév 2017
Or maybe use mean2() on the cropped image.
meanInBox = mean2(cropped)
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur 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!