Can PCA be applied directly on an image?

2013 11 13
2 个回答
回答已采纳
更新时间：2013 11 21
4 次查看（30 天）

0 个投票

Can PCA be applied directly on an image, in contrast to a matrix(in which rows correspond to observations & columns to variables)?
When i try to apply PCA using SVD/Covariance directly on an image i get the following error:
"Error using minus
Integers can only be combined with integers of same class or scalar doubles.
Error in pca2 at 14
data=data-repmat(mn,1,N);"
Thanking you in advance

2 个评论
显示 无 隐藏 无

Algorithms Analyst
Algorithms Analyst 2013-11-13
Check ur image type should be double date try.
sidra
sidra 2013-11-14
Algorithms Analyst ,the image type is double.

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

更多回答（1 个）

sidra
sidra 2013-11-18

0 个投票

Walter, it works fine for a single image but when i try the same on array of images i get the error :
"Array dimensions must match for binary array op.
error in pca2 at 14
data=data-repmat(mn,1,N);
error in db.pca at 18
pc=pca2(imagearray);"

类别

在 帮助中心 和 File Exchange 中查找有关 Dimensionality Reduction and Feature Extraction 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by