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Image processing apparatus and image processing method

An image processing device, pixel technology, applied in the direction of instrumentation, calculation, character and pattern recognition, etc.

Inactive Publication Date: 2011-06-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in order to detect a target pattern in a conventional manner, a large amount of memory is required to realize a table of occurrence probabilities determined using a database.

Method used

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  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method

Examples

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no. 1 example

[0029] This embodiment shows a case where the image processing method according to the present invention is applied to a pattern recognition method. In particular, a case where an image processing method is used as a pattern recognition application for face recognition will be described. It is assumed that face detection processing (detection of the position, size, and inclination of a face in an image) necessary prior to face recognition processing has been performed by some other method. The tilt of the face represents an in-image rotation (in-plane rotation).

[0030] In the first embodiment, the image processing method according to the present invention is applied to the surrounding image of the face, which is cropped according to the face position, size and inclination detected by the face detection process, and normalized. into a predetermined face size and tilt. Therefore, the positions of the eyes, the nose, the mouth, and the like are almost uniform in the image tha...

no. 2 example

[0096] An inspection system using the image processing method according to the present invention is described. This embodiment shows the case where the image processing method of the present invention is applied to the pattern detection method. In particular, an image processing method is used as a pattern detection application for detecting "eyes (human eyes)". That is, the present embodiment is applied to an image processing method of detecting whether eyes exist in an input image.

[0097] For convenience of description, it is assumed that all images to be processed in this embodiment are also grayscale images (brightness images).

[0098] Figure 9 is a block diagram showing an eye detection system according to the second embodiment. The processed image is input to the eye detection system 1009, and the system 1009 outputs detection processing results. If it is determined that an eye exists in the processed image, the system 1009 outputs information for identifying the...

no. 3 example

[0107] In this embodiment, a hardware configuration for executing the image processing methods described in the first embodiment and the second embodiment is explained.

[0108] Figure 10 is a block diagram for explaining a hardware configuration of a computer of an information processing apparatus according to an embodiment of the present invention. refer to Figure 10 , the CPU 1100 is a central processing unit that executes the image processing methods described in the first embodiment and the second embodiment according to a computer program. A program memory 1101 stores programs to be executed by the CPU 1100 . The RAM 1102 provides memory for temporarily storing various information when the CPU 1100 executes computer programs. The hard disk 1103 is a storage medium for saving image files and feature amount images of registered images. The display 1104 presents the processing results in this embodiment to the user. A control bus / data bus 1105 connects the above-ment...

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Abstract

An image processing apparatus includes a comparison unit that selects a pixel of interest in a processing image, and compare magnitudes of luminance value of the pixel of interest and luminance value of each of a plurality of neighboring pixels having a predetermined positional relationship with the pixel of interest; a calculation unit that calculates a feature amount of the pixel of interest based on the predetermined positional relationship between the pixel of interest and each of the plurality of neighboring pixels and a comparison result obtained by the comparison unit. For two neighboring pixels at positions which are point symmetrical with respect to the pixel of interest, the comparison unit sets that only one of the two neighboring pixels has the predetermined positional relationship.

Description

technical field [0001] The present invention relates to an image processing device and an image processing method. Background technique [0002] In recent years, a practical method for detecting target patterns from images by image processing has been proposed. In particular, if the target pattern is a human face, various applications can be considered. Research and development on detection methods flourish. In addition, more and more research and development are being conducted on face recognition methods for not only detecting faces but also identifying which of a pre-registered group of people matches the detected faces. [0003] Usually a matching method is used as a detection / recognition method. In the matching method, the degree of similarity between a pre-prepared template (registration image) and a processed image is calculated through recognition processing such as normalization correlation. [0004] If a face detection / recognition technology using, for example,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06V10/44
CPCG06K9/4604G06K2009/4666G06V10/467G06V10/44
Inventor 山本贵久加藤政美伊藤嘉则
Owner CANON KK
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