feature extraction of image objects with detectMSERFeatures command

Hi, I've used of below code to extract features of my image. In regions there is some information about each region, such as location,axes,orientation, pixellist. and in "fetures" there are the features of each object in each region. but I cant separate objects of each other. because all of them are in "fetures" variable. just I know, each row is for one object. could u please guide me how separate objects features of each other?

Thanks

regions = detectMSERFeatures(I);
[features, valid_corners] = extractFeatures(I,regions);