“Sampler,” an exhibit by Athens artist Didi Dunphy combining the traditional art of cross-stitch embroidery with mobile computing, is on display in the library of the University of North Georgia’s Cumming Campus. The show features embroideries of square barcodes, known as QR codes, that can be scanned with tablets or smartphones to access a variety of videos also created by Dunphy. Dunphy will give an artist talk at 11 a.m. Feb. 6 with reception following at noon.