您应该在进入外循环之前初始化特征矩阵(如果您知道LBP的大小):

you should initialize the feature matrix before entering the outer loop (if you could know the size of LBP):

featureMatrix = zeros(total_images,size_LBP); % where size_LBP is the number of columns of LBP.

然后将循环中的featureMatrix {x} = hist(LBP,0:255);替换为:

then replace featureMatrix {x} = hist(LBP,0:255); in the loop with:

featureMatrix(x,:) = hist(LBP,255);

我希望这对您有用！