JPH01303124A - Endoscope device - Google Patents

Abstract

PURPOSE:To automatically obtain a clear frame freezing picture even when a subject is fluctuated by monitoring the condition of video signal data fetched into a frame memory by a comparing arithmetic part executing the frame freezing control by a control part when the dislocation of the video signal data is in the extent in which a picture vibration does not occur on a picture. CONSTITUTION:A comparing arithmetic device 15, when the level of the vibration width of the video signal data is smaller than a threshold level shown by a vibration width setting means 19, outputs a freeze permitting signal to a controller 14. Even at the time of the freezing instruction, when the dislocation of respective video signal data of ODD and EVEN is larger to the extent in which the freezing picture vibration on the picture occurs, respective video data are not used as the data to generate the frame freezing picture. When a freezing permitting signal is sent from the comparing arithmetic device 15 to the controller 14, a frame freezing control is executed on a frame memory 11 by the controller 14, and therefore, even when the action is executed for a subject, the clear frame freezing picture can be obtained on a monitor 3 with one key operation.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention has an image freezing function. The present invention relates to IAm devices, and particularly to improvements in techniques related to improving the image quality of frame-frozen images.

(Prior Art) Generally, in this type of endoscope apparatus, image freezing is made possible by using a configuration that performs automatic read control on a frame memory in which two fields of video signal data are written for each frame. There is.

There are two types of image freezing: frame freezing and field freezing, and conventionally, image freezing had to be used depending on the situation.

That is, conventionally, when an image with a moving subject is obtained by frame freezing, the frozen image on the screen becomes blurred due to deviations in ODD and EVEN video signal data.

Conventionally, when a subject moves rapidly, a field image is obtained by field freezing, but this field frozen image has lower image quality than a frame frozen image.

(Problems to be Solved by the Invention) As described above, in the case of the conventional endoscope apparatus, when there is movement in the subject, field freezing is normally performed even if the image quality is degraded.

But inside? There are many cases where it is desired to obtain a high-quality frozen image for flvt inspection, and in this case, frame phrase analysis is performed.

However, if frame freezing is performed to ensure high image quality, each time the frozen image becomes blurred, the operator cancels the blurred frozen image and restores it to the real image, and then performs the freezing operation again. had to do it.

Repetition of such operations is one of the obstacles to endoscopy, contrary to the attempt to shorten the examination time in order to minimize the pain of the subject.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide an endoscopic camera that can automatically obtain a clear frame-freeze image with a single key operation, even when there is movement in the subject. The purpose is to provide a mirror device.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention controls the writing and reading of video signal data on the frame memory, and also controls the frame freeze when a freeze instruction is given. The endoscope apparatus is equipped with a control section capable of controlling the creation of images, and the endoscope apparatus compares video signal data each captured into the frame memory in two fields per frame with a blur width threshold set appropriately. If the level of the blur width of the video signal data is smaller than the level indicated by the threshold value, a freeze permission signal is output, and if the level of the video signal data is greater than the level indicated by the threshold value, the freeze permission signal is output. The gist of the present invention is that the control section is provided with a comparison calculation section that compares the level of the video signal data that is displayed with the level indicated by the threshold value.

With the configuration according to the present invention, even if there is a freeze instruction,
If the deviation between ODD and EVEN video signal data is large enough to cause blur in the frozen image on the screen, the video signal data will not be used as data to create a frame frozen image, so the movement of the subject will be affected. Even in such cases, a clear frame-free image can be automatically obtained with a single key operation.

(Embodiment) FIG. 2 is a block diagram schematically showing the entire endoscope apparatus to which the present invention is applied.

This endoscope apparatus is provided with a scope 2 on the input side of the apparatus main body 1, and a monitor 3 such as a CRT on the output side thereof.

The device main body 1 directs light emitted from a light source 4 to a subject (not shown) from the tip of a scope 2 via a light guide 23.
At the same time, among the video signals from the COD 21 operated by the driving/receiving circuit 22 in the scope 2, changes in optical characteristics caused by the scope 2 itself, others, and the light source 4 are adjusted by the signal processing circuit 5, Further, the output signal of the adjusted signal processing circuit 5 is received by a digital scan converter (hereinafter referred to as DSG) 6, and this DSC 6 stores the image, reverses the left and right sides, and controls the image display. There is.

The detailed configuration of the main parts of DSC6 is as shown in Figure 1.
As shown in the figure, ODD field memory 12 and EVE
Frame memory 11 with N fields of memory 13
, the controller 14 , the comparator 15 , the A/D converter 16 , and the D/A converter 17
The main parts of 6 are constructed.

The frame memory 11 is made up of a combination of ODD field and EVEN field memories 12 and 13.
Two fields of video signal data can be written for each frame.

The controller 14 controls the writing and reading of video signal data on the frame memory 11, and also controls the creation of a frame freeze image using a signal indicating freeze execution when a freeze instruction is received.

On the other hand, the controller 14 is attached with a comparator 15, and when the controller 14 receives a freeze instruction in response to a key operation using a hand-operated button (not shown) on the An activation start signal is sent to the comparator 15, and the comparator 15 is activated.

The comparison calculator 15 synchronizes with the sampling time not indicated by the sampling time setting means 18, and reads the frame memory 11.
2 fields per frame to memory 12 and memory 13
The video signal data respectively taken in, that is, the video signal data of the EVEN field and the video signal data of the ODD field, are compared with the threshold level set by the blur width setting means 19.

When the level of the blur width of the video signal data is smaller than the threshold level indicated by the blur width setting means 19, the comparator 15 outputs a freeze permission signal to the controller 14.

If the level of the blur width of the video signal data is greater than the threshold level indicated by the blur width setting means 19, outputting the freeze permission signal is avoided, and the video that is then taken into the memories 12 and 13 of the frame memory 11 is The level of the signal data is compared with the threshold level indicated by the blur width setting means 19. Therefore, when the level of the blur width of the video signal data indicated by the blur width setting means 19 becomes smaller than the threshold level indicated by the blur width setting means 19, a freeze permission signal is output to the controller 14.

However, if the subject continues to move rapidly, the level of the video signal data taken into the memories 12 and 13 of the frame memory 11 will not become lower than the threshold level indicated by the blur width setting means 19.
In this embodiment, the controller 14 is configured such that if a freeze permission signal is not sent from the comparator 15 to the controller 15 even after a set time has elapsed, the controller 14 forcibly executes a frame freeze.

Moreover, instead of having the configuration in which the controller 14 forcibly executes the frame freeze, the comparator 14
5 is configured to forcibly send a freeze permission signal to the controller 14 if the number of repetitions of comparing the level of the video signal data taken into the frame memory 11 with the threshold level of the blur width setting means 19 exceeds a set number of times. You can also do it.

As mentioned above, by configuring the controller 14 and the comparator 15, even if there is a freeze instruction, the OD
If the deviation between the video signal data of D and EVEN is large enough to cause blurring of the frozen image on the screen, the video data will no longer be used as data for creating a frame frozen image.

When a freeze permission signal is sent from the comparator 15 to the controller 14, the controller 14 executes frame freeze control on the frame memory 11, so even if the subject moves, the monitor 3 can be controlled with one key operation. You can get a clear frame freeze image on top.

In addition, in order to obtain a frame-freeze image even when the subject is moving rapidly, frame-freeze control is forcibly executed based on the judgment of the controller 14, so even if a key operation is performed, a frozen image may not be obtained. The situation can be avoided.

In addition, with the configuration of the embodiment described above, frozen images that are sampled one after another are projected on a monitor image, and the most appropriate frozen image is selected from among them and used as a frozen image for observation or as a frozen image for copying. Can be easily applied to the system.

[Effects of the Invention] As described above, the endoscope apparatus to which the present invention is applied monitors the status of the video signal data taken into the frame memory using the comparison calculation unit, and detects any deviation in the video signal data on the screen. When there is no image blurring, the control unit executes frame freeze control, so just by performing the freeze operation once, which instructs the control unit to freeze, even if there is movement in the subject, the frame freeze control will be executed automatically. has the advantage of being able to obtain clear frame-free images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main structure of a DSC of an endoscope apparatus to which the present invention is applied, and FIG. 2 is a block diagram schematically showing the entire endoscope apparatus. 1... Device body 2... Scope 3... Monitor 4... Light source 5... Signal processing circuit
6...DSCll...Frame memory 12...ODD field memory 13...EVEN field memory 14...Controller 15...Comparison calculator agent Patent attorney Nori Chika Kensuke Patent attorney Chika Takeshi Fuji

Claims (3)

[Claims] (1) An endoscope apparatus comprising a control unit that controls writing and reading of video signal data on a frame memory and also controls the creation of a frame freeze image when a freeze instruction is received, to memory 1
The video signal data captured in two fields for each frame is compared with an appropriately set blur width threshold, and if the blur width level of the video signal data is smaller than the level indicated by the threshold, a freeze permission signal is output. , a comparison calculation section is attached to the control section for comparing the level of the video signal data to be next taken into the frame memory with the level indicated by the threshold value when the level of the video signal data is higher than the level indicated by the threshold value. An endoscope device characterized by: (2) The endoscope apparatus according to claim 1, wherein the control unit forcibly executes frame freeze control when receiving a freeze permission signal from the comparison calculation unit even after a set time has elapsed. . (3) The comparison calculation unit is configured to forcibly send a freeze permission signal to the control unit if the number of repetitions of comparing the level of the video signal data taken into the frame memory with the level indicated by the threshold value exceeds a set number of times. The endoscope apparatus according to claim 1, characterized in that: