1. A method comprising: capturing, by a camera coupled to a computing device, an image; determining whether the image includes a representation of at least a portion of a face; responsive to determining that the image includes the representation of at least the portion of the face: comparing one or more spatial frequencies of the image to corresponding spatial frequencies of one or more previously classified images of a plurality of previously classified images, wherein each previously classified image of the plurality of previously classified images is classified as one of a good quality and a poor quality based on the spatial frequencies the respective previously classified image, and wherein each spatial frequency of the one or more spatial frequencies is associated with a visual transition between two or more adjacent pixels of the image; and classifying the image as a good quality image or a poor quality image based on the comparison.