Update features to account for input from multiple images (assumes all images have the same size).
Update features to account for input from multiple images (assumes all images have the same size).

psteinb/vigra,DaveRichmond-/vigra,psteinb/vigra,DaveRichmond-/vigra,psteinb/vigra,DaveRichmond-/vigra,psteinb/vigra,DaveRichmond-/vigra,DaveRichmond-/vigra,psteinb/vigra,DaveRichmond-/vigra,psteinb/vigra,psteinb/vigra,DaveRichmond-/vigra