JPS62245891A - Picture separation and extraction device - Google Patents

Abstract

PURPOSE:To facilitate the confirmation of a mobile object by extracting the mobile object as a binary-coding signal so as to separate the mobile object in a camera picture from a still background pattern. CONSTITUTION:A picture signal 2 obtained by a television camera 1 is inputted to a signal generating circuit 3 and a binary-coding outptut signal 4 of the picture allows a storage circuit 5 to store one field or one frame period of picture data. A data in the storage circuit 5 is read as a delay signal 6 in the H level period of a memory read control signal 32, and a moving signal extracting circuit 7 uses an AND circuti 11 so as to obtain the AND between the bianry coding signal 4 and the delay signal 6, the result and the binary- coding signal 4 are inputted to an exclusive OR circuit 12 to extract the signal of the mobile body only. The output signal from the circuit 7 is subjected to noise rejection by a noise filter 8 and extracted from an output terminal 9 as an output picture signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image separation and extraction device that separates and extracts moving objects from a complex static background screen in images obtained by an imaging device such as a television camera. It is.

BACKGROUND OF THE INVENTION In recent years, as television cameras have become more widespread, their fields of use are expanding to include, for example, surveillance applications, visual applications for industrial robots, and medical education applications. In most of these applications, the image was simply played back and confirmed using the screen, but in recent years - in applications such as FA (factory automation), robots, and remote monitoring, it has become possible to use the image to determine the imaging angle of the TV camera itself. There are demands for controlling, monitoring specific moving objects, tracking and imaging, etc. Conventionally, the output signal level of the camera image is used to confirm the peak value, or the camera image is converted into a contour signal to control the imaging angle of the television camera.

Problems to be Solved by the Invention However, in the conventional example described above, it was not possible to separate a moving object from a static background screen in a camera image.

Therefore, it is difficult to confirm a moving object, and the reliability of controlling the imaging angle of a television camera, monitoring and tracking of a moving object, etc. is inferior.

Therefore, the present invention aims to separate a moving object from a static background screen in an image obtained by an imaging device such as a television camera.
Therefore, the imaging angle of the imaging device can be easily and reliably monitored and tracked, and moving objects can be extracted faithfully and relatively easily. It is an object of the present invention to provide an image separation device that can have a flexible circuit configuration.

Means for solving the problems and technical means of the present invention for solving the above problems include a signal generation circuit that generates a binary signal of the entire object from an image signal obtained by an imaging device; A storage circuit that stores a binary signal from this signal generation circuit, and a movement that extracts only the binary signal of a moving object using the delayed signal read out from this storage circuit and the binary signal from the signal generation circuit. It is equipped with a signal extraction circuit.

For production The effects of the above technical means are as follows.

That is, the image signal obtained by the imaging device is converted into a binary signal by the signal generation circuit. After this binary signal is delayed in a storage circuit, this delayed signal and the next image signal output from the imaging device are compared by a moving signal extraction circuit, the moving object is extracted as a binary signal, and the moving object is detected as a binary signal. Separate information from complex static background information.

Example EMBODIMENT OF THE INVENTION Below, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a block circuit diagram showing an image separation and extraction device in one embodiment of the present invention.

In FIG. 1, 1 is a television camera which is an imaging device; 2
3 is a signal generation circuit into which the image signal outputted from the television camera 1 and the image signal 2 are input.

4 is a subject binary signal output from the signal generation circuit 3;
Reference numeral 5 indicates a memory circuit that stores the subject binary signal 4, 6 indicates a delayed signal output from the memory circuit 5, and 7 indicates a moving signal extraction unit that extracts a moving object as a binary signal using the delayed signal 6 and the binary signal 4. circuit, 8 is a noise filter, 9 is an output terminal, 1
0 is a synchronization separation circuit.

As shown in FIG. 2, for example, the moving object extraction circuit 7 is composed of an AND circuit (ANI circuit) 11 and an exclusive OR circuit (EXCLU8IVE OR circuit) 12.

FIG. 3 is an explanatory diagram of the operation of FIG. 1, and (a) of the same figure shows the vertical drive pulse 3 generated inside the synchronous separation circuit 10 of FIG.
0 (hereinafter abbreviated as VD pulse), (1)) is a memory write control signal 31 generated in synchronization with the VD pulse 30 indicated by (al). (C) is a memory read control signal 32, (C) generated similarly. d) is a signal τ1° for determining the point in time at which the camera signal is stored in the memory circuit 5; (e) represents one cycle time τ2 when tracking a moving object using the signal from the output terminal 9;

Next, the operation of the above embodiment will be explained using FIGS. 1 to 3.

First, the image signal 2 obtained by the television camera in FIG.
The signal is input to the signal generation circuit 3. This generates a binary image signal. This output signal 4 is used to store one field or one frame period of image data in the storage circuit 5 during the HI level period of the memory write control signal 31 shown in FIG.

Next, during the HI level period of the memory read control signal 32 shown in FIG.

In the movement signal extraction circuit 7, the AND circuit 11 calculates the AND of the binary signal 4 and the delayed signal 6 from the storage circuit 5, and the result and the binary signal 4 are sent to the exclusive OR circuit 12. By inputting the signal, only the signal of the moving object is extracted.

The output signal of the movement signal extraction circuit 7 is subjected to noise removal by a noise filter 8, and is taken out from an output terminal 9 as an output image signal. This output image signal drives and controls the video camera 1 to perform tracking via a tracking control circuit (not shown) as necessary.

In this way, in this embodiment, complex static background information and moving object information can be separated and extracted using only one memory circuit.

Effects of the Invention In short, the present invention obtains a binarized signal of the entire subject from an image signal obtained by an imaging device using a signal generation circuit, delays this binarized signal in a storage circuit, and then combines this delayed signal with the next one. This system uses the binary signal of the image output from the imaging device to extract the signal of only the moving object using a moving signal extraction circuit, making it easy to control the imaging angle of the imaging device, monitor and track the moving object, etc. It has the advantage that it can be carried out reliably and furthermore that it can be constructed with a relatively simple circuit.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing an image separation and extraction device according to an embodiment of the present invention, FIG. 2 is a circuit configuration diagram of a movement signal extraction circuit of this embodiment, and FIGS. It is a timing chart of an example. DESCRIPTION OF SYMBOLS 1... Television camera, 2... Image signal, 3... Signal generation circuit, 4... Binarized signal, 5... Memory circuit,
6...Delayed signal, 7...Movement signal extraction circuit, 8...
- Noise filter, 9...output terminal, 10...synchronous separation circuit. Agent's name: Patent attorney Toshi Nakao
2 prefectures

Claims (1)

[Claims] A signal generation circuit that generates a binary signal of the entire subject from an output image signal of an imaging device, a storage circuit that stores the binary signal from the signal generation circuit, and a delayed signal read out from the storage circuit. An image separation and extraction device comprising: a movement signal extraction circuit that extracts only a binary signal of a moving object using a binary signal from the signal generation circuit.