     This function reads the output probabilities from sftImage to CPU, sorts them and gets the label of top 5 probabilities
     
     - Returns:
     A string with top-5 valid labels ready to be put in predictLabel
     */
    func getResults() -> [(String, Float)] {
        
        // gather measurements of MPSImage to use to get out probabilities
        let width = sftImage.width
        let height = sftImage.height
        let numSlices = (sftImage.featureChannels + 3)/4;
        let count = sftImage.texture.width*sftImage.texture.height*sftImage.featureChannels