JPH01303123A - Electronic endoscope device - Google Patents

Abstract

PURPOSE:To suitably select a picture displaying area in one device by reading video signal data from a picture memory, and displaying a picture by reading control corresponding to the selected displaying area by a control part when a prescribed input operation for selecting a desired displaying area is executed. CONSTITUTION:A video signal picked up by a scope 1 is digitized by an A/D converter 2, video signal data are written and read based on the control from a controller 4 on a picture memory 3, and after the analog operation is executed by a D/A converter 5, the data are picture-displayed as the image pick-up contents on a monitor 6. For the writing to the picture memory 3, the position of the picture element is designated by a horizontal synchronizing signal (HD), a vertical synchronizing signal (VD) and a sampling clock and the input is executed for respective lines. The collected video signal data are read in accordance with the prescribed input operation to designate one displaying area according to a reading control signal generated from the controller 4. The reading control signal specifies the reading starting timing and the reading completing timing for respective lines in accordance with the selected displaying area and the reading is controlled.

Description

[Detailed Description of the Invention] [Objective of the Invention 1 (Industrial Application Field) The present invention provides a method for detecting a subject based on a video signal obtained by imaging a subject.
The present invention relates to an electronic endoscope device that displays captured images, and particularly relates to an improvement in a mechanism for setting a display area for captured images on a display screen.

(Prior Art) In conventional electronic endoscope devices, the display area of the captured image on the display screen has several shapes, such as a circle, a square, and a rectangular shape, which are adopted by the device manufacturer, as shown in FIG. This was done in one form for each device, and in devices that adopted a given display area, it was not possible to display images using other display areas.

However, each of the several types of display areas has individual characteristics, and its good or bad cannot be determined unconditionally.

For example, in the case of a round display, a homogeneous image display can be obtained by deleting the part away from the center (the shaded part in Figure 5) where the brightness decreases due to the characteristics of light, and a solid-state image element (
It has the advantage of having the same image display area as the fiberscope type endoscope device, which was the mainstream until the development of COD (hereinafter referred to as COD).

On the other hand, in the case of square display, the display area is the largest and COD
Since all the information collected by is displayed, there is an advantage that there is a large amount of information m.

Furthermore, in the case of a hexagonal display, intermediate properties between the above two display areas can be obtained.

(Problems to be Solved by the Invention) From the above, it is important to select the optimal display area from among the display areas each having individual characteristics. - It is desirable to be able to appropriately select the display area in the device.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic endoscope device in which an image display area can be appropriately selected in the device.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a control section that controls writing and reading of video signal data obtained by silver imaging a subject on an image memory. In response to an input operation to appropriately select display area #4 of 18 image contents on the display screen, a readout control signal corresponding to the selected display area of positive image contents is sent to the image memory.

(Function) In the electronic endoscope device to which the present invention is applied, when the operator performs a predetermined input operation to select a desired display area, the control unit performs readout control corresponding to the selected display area to display an image. Since the video signal data is read from the memory and displayed as an image, it is possible to appropriately select an image display area in the apparatus.

(Embodiment) FIG. 1 is a schematic block diagram of an embodiment of an electronic endoscope apparatus to which the present invention is applied.

In this embodiment, video signal data obtained by digitizing a video signal collected by a scope 1 by an A/D converter 2 is written and read on an image memory 3 under the control of a controller 4, and the video signal data is digitized by an A/D converter 2. After being converted into analog by the /A converter 5, the image is displayed on the monitor 6 as the imaged content.

Now, to simplify the explanation, we will explain it as an electronic endoscope that uses 25 pixels of 5 x 5 (an actual electronic endoscope uses about 100,000 pixels). 2
As schematically shown in the figure, pixel positions are specified using a horizontal synchronizing signal (HD), a vertical synchronizing signal (VD), and a sampling clock, and input is performed for each line. Note that the numbers in FIG. 2 represent addresses of the image memory 3.

The video signal data thus accumulated is then read out in accordance with a readout control signal issued from the controller 4 in response to a predetermined input operation from the surgeon to designate one display area.

This readout control signal controls readout by defining readout start timing and readout end timing for each line according to the selected display area.

For example, in the case of rough type display, as shown in FIG. 3 (Δ), address 13 is on line 1 and address 22 is on line 2.
~24, on line 3, addresses 31-35, on line 4, addresses 42-44, and on line 5, addresses 5
3 are selected, and finally a rough display area (more advanced approximation can be achieved by increasing the number of pixels) is reconstructed as an image, as schematically shown in FIG. 3(B).

In addition, in the case of a square display, as shown in FIG. 4(A), by reading out all addresses on each line, as shown in FIG.
The square display area is reconstructed as schematically shown in B).

As described above, in the electronic endoscope device to which one embodiment of the present invention is applied, images are displayed in the display area selected by the operator under the readout control by the controller 4, and the image display area is changed in the device. You will be able to select as appropriate.

[Effects of the Invention] As explained above, in the electronic endoscope device to which the present invention is applied, a readout control signal is generated from the control unit in response to a predetermined input operation from the operator to select one display area. The image is displayed in the display area selected by the surgeon.
- It becomes possible to appropriately select an image display area in the device, and the operability of the device is improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram of an electronic endoscope device to which the present invention is applied, Fig. 2 is a diagram schematically showing data occupancy, and Fig. 3 is a control signal and configuration for reading data in a round display. FIG. 4 is a diagram schematically showing the control signal for data readout in square display and the image to be constructed. FIG. 5 is a diagram showing an example of the mode of each display area #J. be.

Claims (1)

[Scope of Claims] An electronic endoscope device comprising a control section for controlling the writing and reading of video signal data obtained by imaging a subject on an image memory, comprising: An electronic endoscope apparatus characterized in that, in response to an appropriately selected input operation, a readout control signal corresponding to a display area of selected imaging content is sent from the control section to the image memory.