Q. Does the issur of looking at the face of a rasha (evil person) include looking at the picture, or only at the person?
A. Talmud (Megila 28a) teaches that Rav Yochanan said it is prohibited to look into the face of an evil person.
Halichos Chaim (2: 362 p. 171) quotes Horav Chaim Kanievsky Shlit'a as answering that there is no prohibition in looking at the picture of a rasha. However, Lehoros Nossan (10: 20) maintains that one should abstain from doing so.
Hegyonei Haparsha (Toldos p. 261) explains that it would depend on the different reasons for this prohibition.
Horav Shlomo Miller's Shlit'a opinion is that the prohibition does not apply to a picture.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit'a