From the Library of Congress description of the photograph: This photo shows a soldier in uniform, a wife in dress and hat, and two daughters wearing matching coats and hats. In May 1863, U.S. Secretary of War Edwin Stanton issued General Order No. 143 creating the Bureau of U. S. Colored Troops. This image was found in Cecil County, Maryland, making it likely that this soldier belonged to one of the seven U.S.C.T. regiments raised in Maryland. (Source: Matthew R. Gross and Elizabeth T. Lewin, 2010)
More details can be found at the Library of Congress record for the photo, which is here.
This framed picture is from the Liljenquist Family Collection of Civil War Photographs. You can browse the entire set of photos in this online collection by starting here.