JPH0620051A - Pattern recognizing system - Google Patents

Abstract

PURPOSE:To attain the dynamic recognition of a pattern even if the subject to be recognized is moving. CONSTITUTION:An image pickup device 11' has an image input function 11. A signal processor 12' has an image processing function 12 to extract the features which are substantially effective for recognition of a pattern, a pattern identifying function 13 to recognize the images which are extracted based on the existing patterns, a partial picture element area specifying function 14 to specify a limited picture element area (partial picture element area) including the recognized pattern area and the area where a pattern may possibly exist after a fixed time and to store the specified area in a memory, and a partial picture element signal extracting function 15 to extract a partial picture element signal by collating the image signals of a single screen with the partial picture element area stored in the memory. Then the recognition of patterns is repeated after a partial picture element area is specified out of an entire screen at a certain time and then the image signal processing value is reduced at each time. At the same time, the specification of the partial picture element area is also repeated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pattern recognition system.

[0002]

2. Description of the Related Art In recent years, with the development of information processing systems, neuro-computing simulating the flexible information processing possessed by humans has been applied to pattern recognition.

A conventional pattern recognition system and its processing method will be described below. FIG. 3 is a flowchart showing a conventional pattern recognition system and its processing method. 1'is an image pickup apparatus having a function of inputting an image of 1 and 2'is a signal processing apparatus, which is an image signal processing of 2. With the pattern identification function.

In the image input 1, an image signal of one screen is input by the image pickup device 1 '. Next, in image signal processing 2, 1
A process for extracting features that are essentially effective for recognition from the image signal on the screen is performed. In pattern identification 3, a process of recognizing an image extracted based on a known pattern is performed.

[0005]

However, according to the above method, when the object to be recognized moves, the image signal processing for one screen is performed every fixed time interval. For this reason, it takes time to recognize a pattern, and it is difficult to dynamically recognize and track a specific pattern.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a pattern recognition system and a processing method thereof that enable dynamic pattern recognition even when an object to be recognized moves.

[0007]

In order to achieve the above object, the present invention provides a pattern recognition system of the present invention, in which an image pickup device having an image input function and pattern recognition from an image signal input by the image pickup device are used. And a second processing function for recognizing a pattern of a signal processed by the first processing function based on a known pattern. The imaging device includes a third processing function of identifying pixels in a limited area including a pattern area processed and recognized by the processing function and an area in which a pattern may exist after a certain period of time, and storing the pixels in a memory. The image processing apparatus has a fourth function of extracting a signal corresponding to the pixels in the limited area stored in the memory by the third processing function from the image input image signal, and the image is input by the imaging device at a certain time. Wherein the image signal the first, second and third
An image input by the image pickup device at a subsequent time by specifying pixels in a limited area including a pattern area recognized by the processing function A signal is extracted from the signal by the fourth processing function, pattern recognition is performed by the first, second, and third processing functions, and a recognized pattern area and an area in which a pattern may exist after a certain time are limited. The pixels in the selected area are specified and stored in the memory repeatedly.

In addition, an image pickup apparatus having a function of inputting all images and a function of inputting an image of a portion corresponding to a limited number of pixels, and characteristics required for pattern recognition from an image signal input by the image pickup apparatus are provided. It has a first processing function for extracting, has a second processing function for recognizing a pattern of a signal processed by the first processing function based on a known pattern, and is processed by the second processing function. A third processing function is provided for identifying pixels in a limited area including a recognized pattern area and an area where a pattern may exist after a certain period of time and storing the pixels in a memory, and an image is input by the imaging device at a certain time. The pixels of a limited area including the pattern area recognized by the first, second and third processing functions and the area where the pattern may exist after a certain time are specified from the image signal and recorded in the memory. Then, at a subsequent time, the function of inputting the image of the portion corresponding to the pixel of the limited portion by the imaging device is used, and the portion corresponding to the pixel of the limited area stored in the memory by the third processing function is used. Enter the image of the first
Then, the pixels in a limited area including the pattern area recognized by the second and third processing functions and the recognized pattern area and the area where the pattern may exist after a predetermined time are repeatedly specified and stored in the memory.

[0009]

With this configuration, the amount of image signal processing handled in image processing and pattern identification can be reduced compared to the case of one screen. In this way, the time required for pattern recognition is shortened, and dynamic pattern recognition is possible in a shorter time than before.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a flow chart of a pattern recognition system and a processing method in a first embodiment of the present invention.

In FIG. 1, an image pickup device 11 'has a function of an image input 11. The signal processing device 12 ′ has the function of the image signal processing 12, the function of the pattern identification 13, the function of the partial pixel region identification 14, and the function of the partial pixel signal extraction 15.

The processing method of the pattern recognition system configured as described above will be described below.

First, at time t = t ₀ in FIG. 1, an image signal of one screen is input by the image pickup device 11 ′ and sent to the signal processing device 12 ′. Next, image signal processing 12
Then, a process of extracting a feature essentially effective for recognition from the image signal of one screen is performed. In the pattern identification 13, a process of recognizing an image extracted based on a known pattern is performed. In the partial pixel area identification 14, a limited pixel area (partial pixel area) including the recognized pattern area and an area where a pattern may exist after a certain time is specified and stored in the memory.

Further, at a time next to t> t ₀ , the image input 11 is performed again, and the image signal of the new one screen is compared with the partial pixel area stored in the memory by the partial pixel signal extraction 15 this time. To extract the partial pixel signal. Next, a partial pixel signal having a smaller image signal amount than the image signal of this one screen is processed by the image signal processing 12 and the pattern identification 13.

Further, a new partial pixel area is specified by the partial pixel area specifying 14 and stored in the memory.

By repeating the processing of t> t ₀ at each time thereafter, the image signal processing 12 requiring a long processing time is performed.
Therefore, the image signal amount handled in the process of the pattern identification 13 is always smaller than the image signal amount of one screen. Therefore, dynamic pattern recognition can be realized in a short time.

Next, a second embodiment of the present invention will be described with reference to FIG. The present embodiment is different from the first embodiment in that the imaging device 11 ′ has a function of a partial image input 16 for inputting only an image region (partial image region) corresponding to a partial pixel region at time t> t _0. That is. With this configuration, the same function as partial pixel extraction can be provided on the imaging device side. This configuration can be realized by incorporating a liquid crystal panel into the optical system of the image pickup device and applying a voltage to the liquid crystal panel area corresponding to an image area other than the partial image area so that light is not transmitted.

[0019]

According to the present invention, a limited pixel area (partial pixel area) including a pattern area recognized at a certain time and an area where a pattern may exist after a certain time is specified, and an image is obtained at each subsequent time. Image signal processing handled by image processing and pattern identification by repeating pattern recognition with reduced signal processing amount, pattern area recognized and partial pixel area including area where pattern may exist after a certain time. Since the amount is smaller than in the case of one screen, the time required for pattern recognition is shortened, and an excellent pattern recognition system and a processing method therefor capable of performing dynamic pattern recognition in a shorter time than before are provided.

[Brief description of drawings]

FIG. 1 is a flowchart of a pattern recognition system according to a first embodiment of the present invention.

FIG. 2 is a flowchart of a pattern recognition system according to a second embodiment of the present invention.

FIG. 3 is a flowchart of a conventional pattern recognition system.

[Explanation of symbols]

 1 Image Input 2 Image Signal Processing 3 Pattern Identification 11 Image Input 12 Image Signal Processing 13 Pattern Identification 14 Partial Pixel Area Identification 15 Partial Pixel Signal Extraction 16 Partial Image Input 1 ′ Imager 2 ′ Signal Processor 11 ′ Imager 12 ′ Signal Processor

Claims (2)

[Claims] 1. An image pickup apparatus having an image input function, and a first processing function for extracting a feature necessary for pattern recognition from an image signal image-input by the image pickup apparatus, the image pickup apparatus having the first processing function based on a known pattern. An area having a second processing function for recognizing a pattern of a signal processed by the first processing function, and a pattern area processed and recognized by the second processing function and an area where a pattern may exist after a predetermined time. Of the limited area stored in the memory by the third processing function from the image signal input by the image pickup device. A fourth function of extracting a signal corresponding to a pixel is provided, and a pattern region recognized by the first, second, and third processing functions from an image signal input by the imaging device at a certain time and a fixed time. Specifies a pixel of limited area including the area that might pattern exists stored in the memory,
From the image signal input by the image pickup device at the subsequent time, the signal by the fourth processing function is extracted to obtain the first and second signals.
A pattern area recognized by the third processing function, and a pixel in a limited area including a pattern area recognized by the third processing function and an area in which a pattern may exist after a certain period of time are repeatedly specified and stored in a memory. Pattern recognition system. 2. An image pickup device having an all-image input function and a function of inputting an image of a portion corresponding to a limited portion of pixels,
The image processing apparatus has a first processing function for extracting features required for pattern recognition from an image signal input by the image pickup device, and recognizes a pattern of a signal processed by the first processing function based on a known pattern. A second processing function is provided, and pixels in a limited area including a pattern area processed and recognized by the second processing function and an area where a pattern may exist after a predetermined time are specified and stored in a memory. A third processing function is provided, and there is a possibility that a pattern area recognized by the first, second, and third processing functions from an image signal input by the imaging device at a certain time and a pattern after a certain period of time exist. The third processing is performed by using a function of specifying pixels in a limited area including a certain area, storing the pixels in a memory, and inputting an image of a portion corresponding to the limited portion of pixels by the imaging device at a subsequent time. The image of the portion corresponding to the pixels of the limited area stored in the memory by the function is input, the pattern is recognized by the first, second and third processing functions, and the recognized pattern area and the pattern after a certain time exist. A pattern recognition system characterized in that pixels in a limited area including a possibility area are repeatedly specified and stored in a memory.