Face authentication device having database with small storage capacity
AssigneeNEC Corporation
InventorTakayuki Kase
Life of this patent
Estimating the term…
Abstract
Face authentication can easily be performed based on an input image including a mirror region reflected by a mirror without increasing a storage capacity of a database. With the database, for each face of a person to be authenticated, only one real front image is to be registered as a reference face image. A mirror image processing circuitry detects the mirror region from the input image and to subject a detected mirror region to lateral inversion processing to produce a processed image. A face detection processing circuitry detects a face image from the processed image to generate a detected face image. A face authentication processing circuitry compares the detected face image with the reference face image, to thereby perform face authentication.
Claims10
A face authentication device, which is configured to perform face authentication of any person present in a narrow floor or passage based on an input image picked up by an image pickup device, the input image including a mirror region corresponding to a mirror installed in the narrow floor or passage,
- the face authentication device comprising:
- at least one memory storing instructions;
- and
- one or more processors coupled to the memory, wherein the one or more processors are configured to execute the instructions to:
- store, for a plurality of faces of persons to be authenticated, one real front image as a reference image;
- detect the mirror region in the input image and produce a mirror image from the detected mirror region;
- perform distortion correction of the mirror image when the mirror is a first type of mirror that is a convex mirror and refrain from performing the distortion correction of the mirror image when the mirror is a second type of mirror that is different from the first type of mirror;
- subject the corrected mirror image to lateral inversion processing to produce a processed image;
- detect a face image from the processed image to generate a detected face image;
- and
- compare the detected face image with the reference face image, to thereby perform face authentication, and output a face authentication result,
- wherein the first type of mirror includes a fixed triangular mirror configured to allow the image pickup device to pick up persons to be picked up existing on both sides of the fixed triangular mirror in the narrow floor or passage, and
- wherein the image pickup device picks up the input image including images in a plurality of directions through the first type of mirror by directing the images to the image pickup device.
A face authentication method for performing face authentication of any person present in a narrow floor or passage based on an input image picked up by an image pickup device, the input image including a mirror region corresponding to a mirror installed in the narrow floor or passage,
- the face authentication method comprising:
- detecting the mirror region in the input image and producing a mirror image from the detected mirror region;
- performing distortion correction of the mirror image when the mirror is a first type of mirror that is a convex mirror and refraining from performing the distortion correction of the mirror image when the mirror is a second type of mirror that is different from the first type of mirror;
- subjecting the corrected mirror image to lateral inversion processing to produce a processed image;
- detecting a face image from the processed image to generate a detected face image;
- and
- comparing the detected face image with a reference face image that is one real front image for a plurality of faces of persons to be authenticated, to thereby perform face authentication, and outputting a face authentication result,
- wherein the first type of mirror includes a fixed triangular mirror configured to allow the image pickup device to pick up persons to be picked up existing on both sides of the fixed triangular mirror in the narrow floor or passage, and
- wherein the image pickup device picks up the input image including images in a plurality of directions through the first type of mirror by directing the images to the image pickup device.
A non-transitory computer readable medium storing a face authentication program causing a computer to execute face authentication of any person present in a narrow floor or passage based on an input image picked up by an image pickup device, the input image including a mirror region corresponding to a mirror installed in the narrow floor or passage, the face authentication program causing the computer to execute a face authentication process comprising:
- detecting the mirror region in the input image and producing a mirror image from the detected mirror region;
- performing distortion correction of the mirror image when the mirror is a first type of mirror that is a convex mirror and refraining from performing the distortion correction of the mirror image when the mirror is a second type of mirror that is different from the first type of mirror;
- subjecting the corrected mirror image to lateral inversion processing to produce a processed image;
- detecting a face image from the processed image to generate a detected face image;
- and
- comparing the detected face image with a reference face image that is one real front image for a plurality of faces of persons to be authenticated, to thereby perform face authentication, and outputting a face authentication result,
- wherein the first type of mirror includes a fixed triangular mirror configured to allow the image pickup device to pick up persons to be picked up existing on both sides of the fixed triangular mirror in the narrow floor or passage, and
- wherein the image pickup device picks up the input image including images in a plurality of directions through the first type of mirror by directing the images to the image pickup device.
Dependencies are inferred from the claim text.