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Image synthesizing device, image matching device using same, and image synthesizing method and program

An image synthesis and image technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of reduced authentication rate and inability to create registered image groups.

Inactive Publication Date: 2008-06-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the image comparison device has the following problem: Since the shooting conditions when taking the facial image of the person to be authenticated are different from the shooting conditions when taking the registration image, the personal authentication rate will decrease.
[0006] However, with the aforementioned prior art, when for each of a plurality of registered persons, the facial shape (normal vector) and error components other than the diffuse reflection component, etc. When estimating, because each pixel constituting the registered image is operated as an independent pixel, when the pixel to be operated is in the shadow, it may not be possible to accurately estimate the normal vector or reflectance of the pixel. (The so-called normal albedo vector) is estimated, therefore, it is impossible to create a registered image group consistent with reality

Method used

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  • Image synthesizing device, image matching device using same, and image synthesizing method and program
  • Image synthesizing device, image matching device using same, and image synthesizing method and program
  • Image synthesizing device, image matching device using same, and image synthesizing method and program

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no. 1 Embodiment approach

[0063] First, the image collating device in the first embodiment of the present invention will be described. FIG. 1 is a block diagram showing the configuration of an image collating device 1 in the first embodiment of the present invention.

[0064] As shown in Figure 1, the image comparison device 1 in the first embodiment of the present invention includes: a registered image input unit 2, which inputs a registered image of a registered person; The registration image input by the image input unit 2 is used to make a registration image group under various lighting conditions; the registration image group storage unit 4 stores the registration image group produced by the registration image group production unit 3; The facial image of the authenticator (hereinafter referred to as a comparison image); the comparison and comparison part 8 compares and contrasts the comparison image input from the comparison image input part 5 with the registration image group stored in the regist...

no. 2 Embodiment approach

[0165] Next, the image collating device 40 in the second embodiment of the present invention will be described. FIG. 7 is a block diagram showing the configuration of an image collating device 40 in the second embodiment of the present invention.

[0166] As shown in FIG. 7 , compared with the image collating device 1 in the first embodiment, the image collating device 40 in the second embodiment of the present invention includes: an illumination condition estimating unit 6 based on 5 the input comparison image, a comparison image lighting condition estimating section for estimating lighting conditions such as lighting direction and lighting intensity; The information is sent to the registered image group storage unit 4, and from the registered image group 30 stored in the registered image group storage unit 4, the registered image corresponding to the lighting condition suitable for the lighting condition of the aforementioned comparison image is retrieved and extracted, And...

no. 3 Embodiment approach

[0173] Next, the image collating device 50 in the third embodiment of the present invention will be described. FIG. 8 is a block diagram showing the configuration of an image collating device 50 in the third embodiment of the present invention.

[0174] As shown in FIG. 8 , compared with the image collating device 1 in the first embodiment, the difference between the image collating device 50 in the third embodiment of the present invention is that it includes: The comparison image input by the unit 5 calculates the feature quantity of the comparison image;

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Abstract

The invention relates to an image synthesizing device for synthesizing a second image under prescribed illumination conditions from a first image of an object. The image synthesizing device is provided with an illumination condition estimating section for estimating illumination conditions from the luminance value of the first image; a normal information estimating section for estimating normal information of a prescribed pixel of the first image, including normal direction of the object; an error component information estimating section for estimating error component information under the prescribed illumination conditions; and an image synthesizing section for synthesizing the second image of the object under the prescribed illumination conditions. The normal information estimating section estimates the normal information of the prescribed pixel from information of a plurality of pixels of the first image.

Description

technical field [0001] The present invention relates to an image comparison device for comparing an input two-dimensional image with a pre-recorded two-dimensional image, in particular to an image synthesis device for making a registered image group for comparing images, an image comparison device using the image synthesis device and Image synthesis method. Background technique [0002] Currently, an image comparison device for comparing an input two-dimensional image with a pre-recorded two-dimensional image has been put into practical use. In particular, for a face authentication method, one of authentication methods using biometrics, various image collation devices for realizing the method have been proposed. In this kind of image comparison device, the facial images of multiple people (hereinafter referred to as registered persons) who can be authenticated (hereinafter referred to as registered persons) are recorded in the database as registered images in advance, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T2207/30201G06T5/009G06T7/0028G06T7/33G06T5/92
Inventor 岛野美保子长尾健司(已故)
Owner PANASONIC CORP