Patent ID: 8493178

Claim:
A forged face detecting method comprising: storing a predetermined permission range of a face feature value; projecting line beams onto a subject's face to cover a contour of the subject's face; acquiring a photorealistic image and an infrared image of the subject's face on which line beams are projected; extracting a face feature value from the infrared image based on characteristics of a pattern of the line beams projected on the user's face that are present in the acquired infrared image; checking whether the extracted face feature value falls within the predetermined permission range; if the extracted face feature value falls outside of the predetermined permission range, determining the infrared image to have the forged face and acquiring an infrared image of the subject again; and if the extracted face feature value falls within the predetermined permission range, determining the infrared image to have a non-forged face and performing a face recognition with the photorealistic image; and performing facial recognition using the photorealistic image; and wherein said extracting face features includes extracting face features based on characteristics of a linear pattern for at least one of the entire image, a particular area around a central point of the image, and an area around a subject contour.