Abstract: Embodiments of the present disclosure disclose a method and apparatus for processing information, a device and a medium. A specific embodiment of the method includes: acquiring a face image, and acquiring coordinates of key points of a face contained in the face image, wherein the face contained in the face image does not wear a mask; acquiring a mask image, and combining, based on the coordinates of the key points, the mask image with the face image to generate a mask wearing face image containing a mask wearing face, wherein the mask image belongs to a mask image set, the mask image set includes at least one kind of mask image, and different kinds of mask images contain different masks; and determining the mask wearing face image as a sample for training a deep neural network.