How to display images as result of classification?

Hi..

My concept is matching sketches to photos. For this I have selected SURF descriptor and KNN classifier. Feature extraction process is done on both sketch and photo dataset and the result of SURF features are passed as input to Knn classifier. I have used a cell array to store the label names i.e image1,image2,...so on. When I execute classifier I'm getting result as label corresponding to the feature values of trained data. Here how can retrieve or display testing images with its matched trained image as a result???

Thanking you..

Badly need help

Looking forward to your reply