JPH02268582A - Image processing device - Google Patents

Abstract

PURPOSE:To make a device compact and to perform a fast processing by employing such constitution that an image re-configuration circuit, an area division setting circuit, and a feature extraction circuit are provided and data proper to a small area is processed at every divided small area. CONSTITUTION:The device is equipped with an image signal input means 1, a pre-processing circuit 2 to perform a processing for smoothing and enhancement, etc., and the image re-configuration circuit 3 which comprises an image signal of one picture from an output image signal and outputs the image signal and area information. Also, the area division setting circuit 4 which sets the division of the area by a code for area division for the re-configuration of an image and outputs a selection signal for the same, and the feature extraction circuit 5 which inputs output from the image re-configuration circuit 3 and extracts a feature quantity having one or plural specific areas are provided. And plural feature data are selected at divided areas extending over one picture, which configures a new one picture. In such a way, the device can be made compact, and also, an image processing device with high performance and fast processing speed can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device for monitoring or the like using a video signal.

(Prior art) Fig. 4 shows a block diagram of an image processing unit of a video alarm device manufactured by Adpro, for example, in the figure, (1) is an image signal input means such as a camera, and (2) is an input device. This is a pre-processing circuit that performs processing such as smoothing and emphasis on image signals.
) etc. (51) or 53) input the output from the preprocessing circuit (2), and each background image memory (
This is a feature extraction circuit that extracts a feature amount based on the difference from the background image stored in 71) or 73), and the background image memory (71) or 73) stores red, green, and blue background images, respectively. are stored, and the feature extraction circuits (51) to 53) extract features of red, green, and yellow, respectively.

Next, the operation will be explained. A video signal captured by the image signal input means (1) is decomposed into emphasized data such as color information R, G, and B in a preprocessing circuit (2), and is stored in a background image memory (71) for each color.

The contents stored in (72) and (73) are compared with the feature extraction circuits (51), (52), and (53). The above process applies to red, blue, and
This is done for each green. Here, for example, if there is a certain degree of difference between each color and each background, and if that portion is of a certain size, an intruder will immediately issue an alarm.

(Problems to be Solved by the Invention) Since the conventional image processing device is configured as described above, the device has to have a feature extraction circuit for each emphasized data, which makes the device large-scale and also causes unnecessary data to be removed. There are problems in that not only the processing cost is high, but also the performance may be adversely affected, making it uneconomical.

The present invention has been made to solve the above-mentioned problems, and aims to provide an image processing device that can be made compact, has high performance, and has high processing speed.

[Means to solve the problem]

An image processing apparatus according to the present invention includes: an image signal input means for inputting one or more digital image signals; a preprocessing circuit for performing processing such as smoothing and emphasis on the image signal; an image reconstruction circuit that composes an image signal for one screen from a plurality of image signals and outputs the image signal and area information; and an image reconstruction circuit that sets area division using an area division code for image reconstruction and performs image reconstruction. and a feature extraction circuit that receives the output from the image reconstruction circuit and extracts the characteristic amount of one or more specific regions.

[Effect]

A plurality of characteristic data over one screen in this invention are
It is selected in the divided area and forms a new screen.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1, in which the same parts as in FIG. 4 are denoted by the same reference numerals. In FIG. 1, (1) is an image signal input means, (2) is a preprocessing circuit,
(3) is an image reconstruction circuit that selects features for each region from a plurality of image information, reconstructs one screen's worth of image information, adds region information to this, and outputs it; and (4) Area division setting circuit for dividing the screen and setting areas, (5)
(6) is a feature extraction circuit that extracts a feature amount based on the difference between the background image and the input image; (6) is a region setting control circuit that resets the region based on the processing result of the feature extraction circuit (5); 7) indicates a background image memory that stores a background image. In this configuration, one screen is divided into several small areas, and each area is configured to process only the data specific to that area. There is.

Next, the operation will be explained. An image captured by the image signal input means (1) is decomposed into color information (R, G, B) by a preprocessing circuit (2).

On the other hand, in the image reconstruction circuit (3), the region decomposition setting circuit (4)
The color information corresponding to the region information sent from is selected, and the region information is added to this color information and sent to the feature extraction circuit (5). The screen can be divided into small areas for each feature amount, and resetting can be done according to the processing results.

In the feature extraction circuit (5), the image reconstruction circuit (3)
The color information is processed in accordance with the area information sent from the background image memory (7), and features are extracted by taking the difference with the background image for each color stored in the background image memory (7). Further, the area setting control circuit (6) controls resetting of the area according to the processing result. Here, the processing result by the feature extraction circuit (5) above,
If there is a certain amount of difference from the background and the area becomes a certain size, it will be considered an intruder and an alarm will be issued.

For example, in a monitored area as shown in Figure 2 as a reconstructed image, the sky is divided into blue (8), the wall is divided into red (R), and the grassland is divided into green (G). For example, if a red invader enters a green field, the blue color will not change, but there will be a large change in the red and green colors. or,
If a blue object invades, there will be a change in green and blue, and considering both cases, it is only necessary to compare green in this grassland area. If a green object were to enter, it would be impossible to detect if the color intensity was the same, but it would be possible to detect if there was even a slight difference.

In the above embodiment, RGB color information is used as emphasis data for one image signal input means (1), but this emphasis data may be of any kind, such as edge images or local dispersion data. Also, for example, a plurality of image information input means (11), (12)...(1n) as shown in FIG.
It may also be a video signal from.

In this case, it is also possible to simultaneously view multiple distinctive areas from multiple cameras.

〔Effect of the invention〕

As described above, according to the present invention, since data unique to each divided area is processed in each divided small area, the apparatus can be made compact, and since only valid information is processed, high-speed processing is possible. Moreover, there is an effect that an image processing device with high performance can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an image processing apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of an example of an image for explaining processing contents, and FIG. 3 is an image processing apparatus according to another embodiment of the invention. Block Diagram FIG. 4 is a block diagram of a conventional image processing device. (1) is an image signal input means, (2) is a preprocessing circuit, (3
) is an image reconstruction circuit, (4) is an area division setting circuit, (5
) is a feature extraction circuit, and (6) is a region setting control circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An image signal input means for inputting one or more digital image signals, a pre-processing circuit for performing processing such as smoothing and emphasis on the above-mentioned image signals, and a pre-processing circuit for processing one screen from the plurality of image signals from the above-mentioned pre-processing circuit. an image reconstruction circuit that configures an image signal and outputs the image signal and region information; and an area division circuit that sets area division using area division codes for image reconstruction and outputs selection signals for image reconstruction. An image processing device comprising: a setting circuit; and a feature extraction circuit that receives an output from the image reconstruction circuit and extracts feature amounts of one or more specific regions.