problem with size of output extractLBPFeatures inbuilt function.

for an image in size 480x640 after using extractLBPFeatures function, output is an 1*59 single. for training a neural network such as MLP, that is better input layer less than 59. how to reduce output.

 img = imread('trainimage.jpg');
 features = extractLBPFeatures(img);

[ali]

You can reduce features by Principle Component Analysis (PCA).

in matlab there is pca() function. google it.