JPH08111790A - Image equipment controller - Google Patents

Abstract

PURPOSE: To provide a controller which can start and stop the operation of an image processor, etc., by means of an image signal. CONSTITUTION: An image signal contains only a video component that has a stable DC level through a DC reproduction part 2 via a buffer amplifier part 1. Then the image signal is amplified at an amplifier part 3 up to a level where the presence or absence of the video component can be surely decided. The amplified image signal is inputted to a comparison part 5. At the part 5, the reference voltage is compared with the amplified video component so that the presence or absence of the video component is decided. Based on this decision result, the start/stop is controlled for the operation of an image processor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing system utilizing an image signal and an apparatus for generating a control signal for instructing execution of image processing and image recording in an X-ray apparatus system utilizing the image processing.

[0002]

2. Description of the Related Art Generally, in a system using image processing such as an X-ray image processing system, an image processing apparatus executes image processing under the control of a host such as an X-ray apparatus control unit. For this reason, it becomes necessary for the host side and the image processing device side to interface with each other by an electric signal other than the image signal, and a TTL, a relay contact, a photocoupler, etc. are typically used. Therefore, it becomes necessary to clarify this hardware interface, and it is necessary to prepare a hardware interface circuit corresponding to the host side on the image processing apparatus side.

[0003]

In the system using the conventional image processing, there are several kinds of hardware interfaces as described above. As long as such a hardware interface is used, the hardware corresponding to the host is used. It is necessary to prepare the interface circuit every time the host changes,
There was a problem that the cost would increase. SUMMARY OF THE INVENTION It is an object of the present invention to provide a control device capable of controlling an image processing device from a host without using a special interface signal with a simple configuration using an image signal, in order to solve the above problems. .

[0004]

According to the present invention, there is provided a buffer amplifier for receiving an image signal with a high input impedance, and a DC reproducing unit for stabilizing the DC level of the image signal from the buffer amplifier and extracting only a video component. An amplifying unit for amplifying the video component from the DC reproducing unit to a size that makes it possible to reliably determine the presence or absence of the video component, a reference voltage generating unit, an amplified video component from the amplifying unit, and the reference voltage. It has a comparison unit that compares the reference voltage from the generation unit to determine the presence or absence of a video component, and a conversion unit that matches the determination result output from this comparison unit with the hardware interface of the image device.

[0005]

According to the present invention, when the image signal from the host is input, only the video component of which the DC level is stable in the DC reproducing unit is passed through the buffer amplifying unit, and the presence of the video component is judged by the amplifying unit. It is amplified to a certain size and input to the comparison unit. The comparison unit compares the reference voltage from the reference voltage generation unit with the amplified image component from the amplification unit to determine the presence or absence of the image component. Image processing is executed during the period when it is determined that there is a video component.
Based on this determination result, it is possible to control the start / stop of the processing of the image processing apparatus.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a control device for image equipment showing one embodiment of the present invention. In FIG. 1, reference numeral 1 is a buffer amplifier for receiving an image signal from a host (not shown) with high input impedance, and 2 is a DC reproduction for stabilizing the DC level of the image signal from the buffer amplifier 1 and extracting only a video component. And 3, an amplifying unit that amplifies the video component from the DC reproducing unit 2 by a factor of 4, a reference voltage generating unit, and 5 an amplified video component from the amplifying unit 3 and a reference voltage from the reference voltage generating unit 4. And a comparison unit 6 that determines the presence or absence of a video component by generating a signal for controlling an image processing device (not shown) based on the comparison result of the comparison unit 5, and a hardware interface specific to the image processing device. Is a conversion unit for converting into.

Next, the operation of such a control device for image equipment will be described. The image signal from the host is sent to the DC reproducing unit 2 via the buffer amplifying unit 1, where the DC level becomes stable, and only the video component is extracted from the image signal. This video component is sent to the amplification unit 3, where the comparison unit 5
In order to ensure the determination of the presence / absence of the image component, the signal is amplified twice. Double-amplified image component and reference voltage generator 4
The comparison unit 5 compares with the reference voltage from No. 1 to determine whether or not there is a video component. The reference voltage is determined by adjustment so that it can be surely determined when there is an image component. An image processing device control signal is generated as an image processing period during the period when the comparison unit 5 determines that there is a video component, and the image processing device is controlled via the conversion unit 6 that matches the hardware interface specific to the image processing device to be used. To do.

As described above, it is possible to determine whether or not the image component of the image signal exceeds a certain value. Therefore, if the period when it is determined that there is an image component based on the result of this determination is the image processing period. The start / stop of the image processing apparatus can be controlled by this determination result. Therefore, it is not necessary to provide a special interface signal for image processing from the host. Further, in this embodiment, the control device is separate from the image processing device, but the circuit of this control device can be incorporated in the image processing device from the beginning. Since the DC regenerating unit is originally incorporated, this control can be performed by incorporating a unit other than the buffer amplifying unit 1 and the DC regenerating unit 2.

[0009]

According to the present invention, the start / stop of the processing of the image processing apparatus can be controlled depending on whether or not the video component of the image signal exceeds a certain value without requiring a special interface with the host side. Therefore, it suffices to prepare one type of control device, and a system using image processing can be easily and inexpensively configured.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device for an image device showing an embodiment of the present invention.

[Explanation of symbols]

 1 Buffer amplification section 2 DC regeneration section 3 Amplification section 4 Reference voltage generation section 5 Comparison section 6 Conversion section

Claims (1)

[Claims] 1. A buffer amplification section for receiving an image signal with a high input impedance, a DC reproduction section for stabilizing a DC level of an image signal from the buffer amplification section and extracting only a video component, and a DC reproduction section for the DC reproduction section. An amplification unit that amplifies the image component to a size that makes it possible to reliably determine the presence or absence of the image component, a reference voltage generation unit, an amplified image component from the amplification unit, and a reference voltage from the reference voltage generation unit. An image device control apparatus comprising: a comparison unit for comparing and judging the presence / absence of a video component; and a conversion unit for matching a determination result output from the comparison unit with a hardware interface of the image device.