JP4618982B2 - Enlarged display electronic endoscope device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic endoscope apparatus for observing and treating internal organs such as the stomach, and more particularly to an electronic endoscope apparatus capable of magnifying and observing a part of a displayed observation image.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an electronic endoscope apparatus that displays an in-vivo image captured by a videoscope on a monitor and can display an enlarged image of a part of the observed image (hereinafter referred to as an enlarged display image) on the same monitor is known. ing. There is also known an electronic endoscope apparatus capable of simultaneously displaying an enlarged display image and a normal image showing the entire body (hereinafter referred to as a normal display image) on one screen of a monitor (see Patent Document 1). ).
[0003]
[Patent Document 1]
JP-A-1-178234 (FIG. 5)
[0004]
[Problems to be solved by the invention]
Since the display area of one screen of the monitor is limited, when a normal display image and an enlarged display image are displayed on one display screen, the other image becomes an obstacle to observing one image, and the operator However, there is a risk that the affected part or the like cannot be observed accurately.
[0005]
Therefore, an object of the present invention is to obtain an electronic endoscope apparatus that can observe a normal display image and an enlarged display image at the same time without interfering with each other.
[0006]
[Means for Solving the Problems]
An electronic endoscope apparatus according to the present invention is an electronic endoscope apparatus including a video scope having an image sensor and a processor for processing an image signal read from the image sensor, and the entire subject image captured by the video scope is displayed. A normal display means for displaying on the first screen as a normal display image; and an enlarged display means for displaying a magnified display image on the second screen by enlarging a partial area of the entire subject image. . An operator such as a doctor can clearly observe both the enlarged display image and the normal display image.
[0007]
For example, it is preferable that the normal display means presents an enlarged area in the normal display image. Further, it is preferable to further include a signal processing unit for print display that performs signal processing so that the enlarged display image and the normal display image are simultaneously printed on one print sheet. The processor may include a signal processing circuit that performs normal display signal processing on the image signal read from the image sensor and performs enlarged display signal processing on the image signal read from the image sensor.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electronic endoscope apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0009]
FIG. 1 is a block diagram of an electronic endoscope apparatus according to this embodiment.
[0010]
The electronic endoscope apparatus includes a video scope 10 having a CCD 12, a processor 20 that processes an image signal read from an image sensor, and a monitor 52 that displays a subject image. The video scope 10 is detachably connected to the processor 20, and a keyboard 50 is connected to the processor 20 together with a monitor 52. When surgery and examination are started, the video scope 10 is connected to the processor 20 and inserted into the body toward the observation site such as the stomach.
[0011]
The light emitted from the lamp (light source) 24 is incident on the incident end 13 a of the optical fiber bundle 13 provided in the video scope 10 through the condenser lens 26. The optical fiber bundle 13 is an optical fiber that transmits the light emitted from the lamp 24 to the distal end side of the videoscope 10 having the observation site, and the light passing through the optical fiber bundle 13 is emitted from the emission end 13b. Thereby, illumination light is irradiated to the observation region S.
[0012]
The light reflected by the observation region S passes through the objective lens 11 and reaches the light receiving surface of the CCD 12, whereby a subject image of the observation region S is formed on the light receiving surface of the CCD 12. In this embodiment, a single plate type of a simultaneous imaging method is applied as a color imaging method, and yellow (Ye), cyan (Cy), magenta (Mg), and green (G) colors are provided on the light receiving surface of the CCD. A complementary color filter (not shown) made up of elements is provided. In the CCD 12, an image signal of a subject image corresponding to a color passing through the complementary color filter is generated by photoelectric conversion, and one frame or every predetermined time interval. Image signals for one field are sequentially read out. In the present embodiment, the NTSC system is applied as the color television system, and image signals for one frame (one field) are sequentially read out every 1/30 (1/60) second interval, and are sent to the initial circuit 19. Sent.
[0013]
In the initial processing circuit 19, the read image signal is amplified and converted from an analog signal to a digital signal. The digitized image signal is sent to the scope side signal processing circuit 16 and subjected to various processing such as R, G, B gain control, gamma correction, and the processed image signal is processed by the processor side signal processing of the processor 20. It is sent to the circuit 44.
[0014]
In the processor-side signal processing circuit 44, in addition to normal display signal processing for displaying the entire subject image, enlarged display signal processing for enlarging and displaying a part of the normal display observation image is performed. The image signal subjected to the normal display signal processing is converted into the first luminance signal Y1 and the first color difference signals Cb1 and Cb1, and the first Y memory 37A, the first RY memory 37B, and the first Is temporarily stored in the BY memory 37C. On the other hand, the image signal subjected to the enlarged display signal processing is converted into the second luminance signal Y2 and the second color difference signals Cb2 and Cr2, and the second Y memory 39A, the second RY memory 39B, The data is temporarily stored in the second BY memory 39C. The first luminance signal Y1, the first color difference signals Cb1, Cr1, and the second luminance signal Y1, the second color difference signals Cb2, Cr2 are sent to the video processing circuit 41, respectively.
[0015]
In the video processing circuit 41, the first luminance signal Y1 and the first color difference signals Cb1 and Cr1 are converted into video signals such as NTSC signals and output to the first monitor 52A. On the other hand, the second luminance signal Y1 and the second color difference signals Cb2 and Cr2 are also converted into video signals and output to the second monitor 52B. As a result, the normal display image and the enlarged display image are displayed on the first monitor 52A and the second monitor 52B, respectively (see FIG. 2). Further, the video processing circuit 41 performs signal processing so that the normal display image and the enlarged display image are simultaneously printed on one sheet of paper, and the processed video signal is sent to the printer 80. As a result, the normal display image and the enlarged display image can be simultaneously printed on one print sheet PP (see FIG. 3).
[0016]
The processor control unit 36 controls the entire processor 20 and outputs a control signal to each circuit such as the video processing circuit 41 and the signal processing circuit 44. In the timing control circuit 42, a clock pulse for adjusting the signal processing timing is output to each circuit in the processor 20, and a synchronization signal added to the video signal is sent to the video processing circuit 41.
[0017]
A diaphragm 22 for adjusting the amount of illumination light applied to the subject S is provided between the incident end 13a of the light guide 13 and the condensing lens 26. The diaphragm 22 is opened and closed by the control of the diaphragm adjustment circuit 34, and is directed to the subject S. The amount of light to be irradiated is adjusted.
[0018]
In the video scope 10, a scope control unit 15 that controls the entire video scope 10 and a memory 14 in which data relating to characteristics of the video scope 10 are stored in advance are provided. The scope control unit 15 sends a control signal to the scope-side signal processing circuit 16 and reads data from the memory 14 as appropriate. When the video scope 10 is connected to the processor 20, data is transmitted between the scope control unit 15 and the processor control unit 36, and data related to the scope characteristics is transmitted to the processor 20.
[0019]
The front panel 46 is provided with a setting switch 46A for setting a reference luminance value used as a reference in automatic light control, and a signal corresponding to a value set by the operator operating the setting switch 46. Is sent to the processor control unit 36. An enlargement ratio setting button 11 provided in the video scope 10 is a button for setting an enlargement ratio when performing enlargement display. Here, enlargement display of 2 times or 4 times is set. A signal corresponding to the enlargement ratio set by the enlargement ratio setting button 11 is sent to the processor control section 36 via the scope control section 15, and the processor control section 36 sends a signal to the processor side signal processing circuit 44 in response to this signal. Sends enlargement rate information for enlargement display signal processing. In the processor-side signal processing circuit 44, based on the enlargement ratio information and the displayable area information of the second monitor 52B, the area to be enlarged from the center at the time of normal display from the image signal subjected to the normal display signal processing Are cut out and subjected to enlargement processing such as interpolation.
[0020]
As described above, according to the present invention, the normal display image is displayed on the first monitor 52A and the enlarged display image is displayed on the second monitor 52B.
[0021]
In addition, as shown in FIG. 4, you may display frame FF so that the area | region currently expanded in the normal display image may be specified. In this case, signal processing for displaying the frame FF is performed in the processor-side signal processing circuit 44. Furthermore, an operation member such as a cross key or a joystick is provided on the video scope 10 so that the position of the frame FF can be changed as appropriate by operating the operation member, and a signal corresponding to the position of the frame FF set by the operation member is received. The signal is sent to the processor control unit 36 via the scope control unit 15, and the processor control unit 36 sends a signal for controlling the enlargement area of the enlargement display signal processing to the processor side signal processing circuit 44 in response to this signal. May be. As a result, a desired region in the normal display observation image can be enlarged and displayed without moving the distal end side of the video scope 10. Further, a frame sequential method may be applied instead of the single plate type.
[0022]
【The invention's effect】
As described above, according to the present invention, the normal display image and the enlarged display image can be observed simultaneously without interfering with each other.
[Brief description of the drawings]
FIG. 1 is a block diagram of an electronic endoscope apparatus according to an embodiment.
FIG. 2 is a diagram showing a normal display image and an enlarged display image displayed on a first monitor and a second monitor.
FIG. 3 is a diagram illustrating a normal display image and an enlarged display image printed on a print sheet.
FIG. 4 is a diagram showing a normal display image with a frame displayed on the monitor of the first monitor and an enlarged display image within the frame of the normal display image displayed on the second monitor.
[Explanation of symbols]
10 video scope 20 processor 41 video processing circuit 44 processor side signal processing circuit 52A first monitor 52B second monitor

Claims (1)

An electronic endoscope apparatus comprising a video scope having an image sensor and a processor for processing an image signal read from the image sensor,
Normal display means for displaying the entire subject image captured by the videoscope on the first screen as a normal display image that is a moving image;
An enlarged display means for enlarging a partial area of the entire subject image and displaying an enlarged display image as a moving image on a second screen different from the first screen;
The processor performs normal display signal processing on the image signal read from the image sensor so that both the enlarged display image and the normal display image are simultaneously displayed as moving images, and enlarges the image signal read from the image sensor. An electronic endoscope apparatus comprising a signal processing circuit that performs display signal processing,
The normal display means displays a frame presenting an enlarged area in the normal display image;
An operation member provided on the video scope and operated to change the position of the frame;
The electronic endoscope apparatus, wherein the enlargement display unit enlarges and displays a region within the frame whose position has been changed in accordance with an operation on the operation member.

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