JP6177479B2 - ADJUSTING DEVICE, ADJUSTING METHOD, PROGRAM, AND RECORDING MEDIUM - Google Patents

Description

  The present invention relates to an endoscope, a processor, and an adjustment device that are introduced into a subject and acquire an image in the subject.

  2. Description of the Related Art Conventionally, endoscopes in which an imaging unit such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) is provided at the distal end of an insertion unit to be inserted into a subject have been widely used in the medical field. Such an endoscope is connected to a processor (processing device) via a transmission cable and a connector. It is known that a processor generates an image of a subject used for diagnosis by performing various types of image processing on an image signal output from an imaging unit (see Patent Document 1). In this technique, an automatic gain adjustment amplifier (hereinafter referred to as “GCA unit”) provided in an endoscope amplifies an analog image signal output from an imaging unit with a predetermined amplification factor (gain) and sends it to a processor. Output. The processor performs image processing on the image signal amplified by the GCA unit to generate an image of the subject.

JP 2009-2137790 A

  However, in the conventional endoscope described above, the amplification factor by the GCA unit is not set in consideration of the entire system including the endoscope, the processor, and the light source device that irradiates the subject with illumination light. There is a problem that the amplification factor of the GCA unit varies depending on the type of light source, and the quality of the image signal is lowered.

  The present invention has been made in view of the above, and an object of the present invention is to provide an endoscope, a processor, and an adjustment device that can prevent variation in the amplification factor by the GCA unit regardless of the type of light source. And

  In order to solve the above-described problems and achieve the object, an endoscope according to the present invention is an endoscope that is inserted into a subject and can generate an image of the subject, and receives light from the outside. An image pickup unit that generates an image signal, an amplification unit that amplifies the image signal generated by the image pickup unit at a predetermined amplification factor, each of a plurality of light sources, and the amplification factor of the image signal A light source device that records the attached light source amplification factor information and the endoscope, and is provided in the light source device that irradiates the subject with illumination light through the endoscope With reference to the light source amplification factor information recorded by the recording unit, the acquisition unit that acquires light source information indicating the type of light source, the amplification unit with the amplification factor according to the light source information acquired by the acquisition unit And an amplification control unit that amplifies the image signal.

  The endoscope according to the present invention, in the above-described invention, is connected to the insertion section that can be inserted into the subject and the insertion section, and performs image processing on the image signal amplified by the amplification section. A connector portion connectable to a processor; and a distal end portion provided at a distal end of the insertion portion, wherein the imaging unit is disposed at the distal end portion, and the amplification unit, the recording unit, and the acquisition unit Each of the unit and the amplification control unit is provided in the connector unit.

  In addition, a processor according to the present invention includes an endoscope provided with an imaging unit that is inserted into a subject and generates an image signal of the subject by imaging the subject, and the subject via the endoscope. A light source device that irradiates a specimen with illumination light, the light source information indicating the type of light source provided in the light source device is acquired from the light source device, and each of the plurality of light sources An acquisition unit that acquires the light source amplification factor information from a recording unit that records light source amplification factor information associated with an amplification factor of an amplification unit that amplifies the image signal provided in the endoscope; and the acquisition unit An amplification control unit that refers to the light source amplification factor information acquired by the amplification unit and amplifies the image signal in the amplification unit provided in the endoscope at the amplification factor according to the light source information. It is characterized by that.

  The adjustment device according to the present invention includes an imaging unit that receives an external light to generate an image signal, and an amplification unit that amplifies the image signal generated by the imaging unit with a predetermined amplification factor. An adjustment device for adjusting the amplification factor by the amplification unit in an endoscope, having a plurality of different light sources, and sequentially irradiating the imaging unit with light emitted from each of the plurality of light sources A light source unit; a calculation unit that calculates the amplification factor of each of the plurality of light sources based on the image signal generated by each of the plurality of light sources and a preset reference value; A recording control unit that records each of a plurality of light sources and a plurality of amplification factors calculated by the calculation unit in a recording unit provided in the endoscope in association with each other. .

  According to the present invention, it is possible to prevent variation in the amplification factor by the GCA section regardless of the type of light source.

FIG. 1 is a diagram schematically showing an overall configuration of an endoscope system according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing functions of main parts of the endoscope system according to Embodiment 1 of the present invention. FIG. 3 is a diagram illustrating an example of light source gain information recorded by the light source gain recording unit of the endoscope according to the first embodiment of the present invention. FIG. 4 is a block diagram schematically showing the configuration of the adjusting device according to the first embodiment of the present invention. FIG. 5 is a flowchart showing an outline of adjustment processing performed on the endoscope by the adjustment device according to Embodiment 1 of the present invention. FIG. 6 is a flowchart showing an outline of processing executed by the endoscope according to Embodiment 1 of the present invention. FIG. 7 is a block diagram showing functions of main parts of the endoscope system according to Embodiment 2 of the present invention. FIG. 8 is a flowchart showing an outline of processing executed by the processor according to Embodiment 2 of the present invention.

  Hereinafter, an endoscope system will be described as a mode for carrying out the present invention (hereinafter referred to as “embodiment”). Further, the present invention is not limited by this embodiment. Further, in the description of the drawings, the same portions will be described with the same reference numerals. Furthermore, the drawings are schematic, and it should be noted that the relationship between the thickness and width of each member, the ratio of each member, and the like are different from the actual ones. Moreover, the part from which a mutual dimension and ratio differ also in between drawings.

(Embodiment 1)
[Configuration of endoscope system]
FIG. 1 is a diagram schematically showing an overall configuration of an endoscope system according to Embodiment 1 of the present invention. An endoscope system 1 shown in FIG. 1 includes an endoscope 2, a transmission cable 3, a connector unit 5, a processor 6 (processing device), a display device 7, and a light source device 8.

  The endoscope 2 captures an in-vivo image of the subject by inserting the insertion unit 100 that is a part of the transmission cable 3 into the body cavity of the subject, and outputs an image signal (image data) to the processor 6. In addition, the endoscope 2 is provided at one end side of the transmission cable 3 and provided with a distal end portion 20 (imaging device) for capturing an in-vivo image on the distal end 101 side of the insertion portion 100 inserted into the body cavity of the subject. The operation unit 4 that receives various operations on the endoscope 2 is connected to the proximal end 102 side of the insertion unit 100. An image signal of an image captured by the distal end portion 20 is output to the connector portion 5 through, for example, the transmission cable 3 having a length of several meters.

  The connector unit 5 is connected to the endoscope 2, the processor 6, and the light source device 8, performs predetermined signal processing on the image signal output from the connected endoscope 2, and converts the image signal from an analog signal to a digital signal. Conversion (A / D conversion) and output to the processor 6.

  The processor 6 is configured by using a CPU (Central Processing Unit) or the like, performs predetermined image processing on the image signal output from the connector unit 5, and comprehensively controls the entire endoscope system 1.

  The display device 7 displays an image corresponding to the image signal subjected to image processing by the processor 6. The display device 7 displays various information related to the endoscope system 1. The display device 7 is configured using a display panel such as liquid crystal or organic EL (Electro Luminescence).

  The light source device 8 is configured using, for example, a halogen lamp, a white LED (Light Emitting Diode), or the like, and is connected to the subject from the distal end 101 side of the insertion portion 100 of the endoscope 2 via the connector portion 5 and the transmission cable 3. Irradiate with illumination light.

  FIG. 2 is a block diagram illustrating functions of a main part of the endoscope system 1. With reference to FIG. 2, the detail of each part structure of the endoscope system 1 and the path | route of the electrical signal in the endoscope system 1 are demonstrated.

[Configuration of endoscope]
First, the configuration of the distal end portion 20 of the endoscope 2 will be described.
As shown in FIG. 2, the distal end portion 20 includes an optical system 21, an imaging unit 22, a transmission buffer 23, a timing generation unit 24, and a light guide 25. Further, the front end 20 receives the power supply voltage VDD generated by the power supply 61 in the processor 6 through the transmission cable 3 together with the ground GND. A power supply stabilizing capacitor C1 is provided between the power supply voltage VDD supplied to the distal end portion 20 and the ground GND.

  The optical system 21 is configured using one or a plurality of lenses and a prism. The optical system 21 forms a subject image on the light receiving surface of the imaging unit 22.

  The imaging unit 22 receives an object image formed by the optical system 21 and performs photoelectric conversion to generate an analog image signal (electric signal). The imaging unit 22 is configured using an image sensor such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

  The transmission buffer 23 amplifies an analog image signal output from the imaging unit 22 via the transmission cable 3 and outputs the amplified signal to the connector unit 5. The transmission buffer 23 is realized using an amplifier or the like.

  The timing generation unit 24 generates a timing signal based on the reference clock signal and the synchronization signal input from the connector unit 5 and outputs the timing signal to each of the imaging unit 22 and the transmission buffer 23.

  The light guide 25 irradiates the subject with illumination light emitted from the light source device 8. The light guide 25 is realized using a glass fiber, an illumination lens, or the like.

Next, the structure of the connector part 5 of the endoscope 2 will be described.
The connector unit 5 includes a reception amplifier 51, a GCA unit 52, an A / D conversion unit 53, a drive signal generation unit 54, a connector recording unit 55, and a connector control unit 56.

  The reception amplifier 51 receives an analog image signal input from the transmission buffer 23 of the distal end portion 20 via the transmission cable 3, amplifies the received image signal, and outputs the amplified image signal to the GCA unit 52.

  Under the control of the connector control unit 56, the GCA unit 52 amplifies the analog image signal input from the reception amplifier 51 and outputs it to the A / D conversion unit 53. In the first embodiment, the GCA unit 52 functions as an amplification unit.

  The A / D conversion unit 53 generates a digital image signal by performing A / D conversion on the analog image signal amplified by the GCA unit 52, and outputs the image signal to the processor 6.

  The drive signal generation unit 54 is supplied from the processor 6 and is a synchronization that represents the start position of each frame based on a reference clock signal (for example, a 27 MHz clock signal) that serves as a reference for the operation of each component of the endoscope 2. A signal is generated and output together with the reference clock signal to the timing generation unit 24 of the distal end portion 20 via the transmission cable 3. Here, the synchronization signal generated by the drive signal generation unit 54 includes a horizontal synchronization signal and a vertical synchronization signal.

  The connector recording unit 55 is realized using a nonvolatile memory or the like, and records a program executed by the connector control unit 56. The connector recording unit 55 includes a light source amplification factor recording unit 551. The light source amplification factor recording unit 551 records light source amplification factor information in which each of the plurality of light sources is associated with the amplification factor of the image signal by the GCA unit 52.

FIG. 3 is a diagram illustrating an example of light source gain information recorded by the light source gain recording unit 551. As shown in FIG. 3, in the light source amplification factor information T1, the type of the light source and the amplification factor of the GCA unit 52 corresponding to the type of the light source are recorded in association with each other. For example, as shown in FIG. 3, when the type of the light source is "A", it is described "G _A" to the amplification factor by the GCA unit 52, when the type of the light source is "B", the amplification factor by the GCA 52 “G _B ” is described, and “G _C ” is described in the amplification factor by the GCA unit 52 when the type of the light source is “C”. These amplification factors are recorded by using an adjusting device which will be described later when the endoscope 2 is shipped.

  The connector control unit 56 is configured using an FPGA (Field Programmable Gate Array). The connector control unit 56 acquires the light source information from the light source device 8 via the connected processor 6, the light source information acquired by the acquisition unit 561 and the light source amplification factor information recorded by the light source amplification factor recording unit 551. And an amplification control unit 562 that causes the GCA unit 52 to amplify the image signal at an amplification factor according to the type of the light source.

[Processor configuration]
Next, the configuration of the processor 6 will be described.
The processor 6 includes a power supply unit 61, a clock generation unit 62, an image processing unit 63, an input unit 64, a processor recording unit 65, and a processor control unit 66.

  The power supply unit 61 generates a power supply voltage VDD, and supplies the generated power supply voltage VDD to the distal end portion 20 through the connector unit 5 and the transmission cable 3 together with the ground GND.

  The clock generation unit 62 outputs a reference clock signal that serves as a reference for the operation of each component of the endoscope 2 to the drive signal generation unit 54.

  The image processing unit 63 performs synchronization processing, white balance (WB) adjustment processing, gain adjustment processing, gamma correction processing, digital analog (D / A) conversion processing on the digital image signal input from the connector unit 5. Then, image processing such as format conversion processing is performed and output to the display device 7.

  The input unit 64 receives input of various instructions of the endoscope system 1. Specifically, the input unit 64 receives an input of an instruction signal for switching the type of illumination light emitted by the light source device 8. The input unit 64 is configured using buttons, switches, and the like.

  The processor recording unit 65 is configured using a volatile memory, a nonvolatile memory, or the like, and records various programs executed by the endoscope system 1, data being processed, and the like.

  The processor control unit 66 is configured using a CPU or the like, and controls each unit of the endoscope system 1. When the processor control unit 66 receives an instruction signal for switching the illumination light emitted from the light source device 8 from the input unit 64, the processor control unit 66 controls the light source device 8 to change the type of illumination light emitted from the light source device 8. Switch.

[Configuration of light source device]
Next, the configuration of the light source device 8 will be described.
The light source device 8 includes a light source unit 81, a light source driver 82, a switching filter 83, a drive unit 84, a drive driver 85, a condenser lens 86, a light source recording unit 87, and an illumination control unit 88. .

  The light source unit 81 emits white light. White light emitted from the light source unit 81 is irradiated to the outside from the distal end of the endoscope 2 via the condenser lens 86 and the light guide 25. The light source unit 81 is realized using a xenon lamp, an LED (Light Emitting Diode), or the like.

  The light source driver 82 causes the light source unit 81 to emit white light by supplying power to the light source unit 81 under the control of the illumination control unit 88.

  The switching filter 83 is detachably disposed on the optical path of white light emitted from the light source unit 81. The switching filter 83 transmits only the blue narrow-band light and the green narrow-band light among the white light emitted from the light source unit 81. Specifically, the switching filter 83 is a narrowband light (Narrow) composed of blue narrowband (for example, 390 nm to 445 nm) light included in white light and green narrowband (for example, 530 nm to 550 nm) light. Band Imaging) is transmitted.

  The drive unit 84 inserts or retracts the switching filter 83 on the optical path of white light emitted from the light source unit 81. The drive unit 84 is realized using a stepping motor, a DC motor, or the like.

  The drive driver 85 supplies predetermined power to the drive unit 84 under the control of the illumination control unit 88.

  The condensing lens 86 condenses the white light emitted from the light source unit 81 or the narrowband light transmitted through the switching filter 83 and emits it to the light guide 25.

  The light source recording unit 87 is configured by using a non-volatile memory or the like, and records a light source ID including a type and year of the light source of the light source unit 81, identification information for identifying the light source device 8, and the like. Have

  The illumination control unit 88 controls the light source driver 82 to turn on / off the light source unit 81. The illumination control unit 88 controls the drive driver 85 under the control of the processor control unit 66 to cause the switching filter 83 to be inserted into and removed from the optical path of white light emitted from the light source unit 81. Control is performed to switch the illumination light emitted from the unit 81 to white light or narrowband light.

  In the endoscope system 1 configured as described above, the endoscope 2 is inserted into the mouth of the subject, the processor 6 performs image processing on the image signal captured by the endoscope 2, and the display device 7 displays an image corresponding to the image signal input from the processor 6.

[Configuration of adjusting device]
Next, an adjustment device that adjusts the amplification factor of the GCA unit 52 in the endoscope 2 when the endoscope 2 is shipped will be described in detail. FIG. 4 is a block diagram schematically illustrating a configuration of an adjustment device that adjusts the amplification factor of the GCA unit 52 in the endoscope 2.

  4 includes a power supply unit 91, a clock generation unit 92, a first light source unit 93, a second light source unit 94, a third light source unit 95, a light source control unit 96, and an adjustment value recording. A unit 97, an amplification factor calculation unit 98, and a recording control unit 99.

  The power supply unit 91 generates a power supply voltage VDD, and supplies the generated power supply voltage VDD together with the ground GND to the distal end portion 20 via the connector unit 5 and the transmission cable 3.

  The clock generation unit 92 outputs a reference clock signal that serves as a reference for the operation of each component of the endoscope 2 to the drive signal generation unit 54.

  The first light source unit 93 is configured using a xenon lamp. The first light source unit 93 emits white light toward the endoscope 2 under the control of the light source control unit 96.

  The second light source unit 94 is configured using a white LED lamp. The second light source unit 94 emits white light toward the endoscope 2 under the control of the light source control unit 96.

  The third light source unit 95 is configured using a xenon lamp and a filter that transmits a predetermined narrow band. The third light source unit 95 emits narrowband light (NBI) toward the endoscope 2 under the control of the light source control unit 96.

  The light source control unit 96 is configured using a CPU or the like, and controls the operations of the first light source unit 93, the second light source unit 94, and the third light source unit 95. Specifically, the light source control unit 96 sequentially emits illumination light to each of the first light source unit 93, the second light source unit 94, and the third light source unit 95 at a predetermined timing.

  The adjustment value recording unit 97 is configured using a nonvolatile memory, a volatile memory, or the like, and records the reference value of the image signal when the imaging unit 22 of the endoscope 2 receives the reference light.

  The amplification factor calculation unit 98 calculates the amplification factor by the GCA unit 52 for each light source based on the level of the image signal input from the A / D conversion unit 53 and the reference value recorded by the adjustment value recording unit 97.

  The recording control unit 99 records the amplification factor calculated by the amplification factor calculation unit 98 and the type of the light source in the light source amplification factor recording unit 551 of the connector unit 5 of the endoscope 2 in association with each other.

  The adjustment device 9 configured in this way associates each of the plurality of light sources with the amplification factor of the GCA unit 52 before the endoscope 2 is shipped to the market, and the light source amplification factor of the connector unit 5. Light source amplification factor information is recorded in the recording unit 551.

[Processing of adjusting device]
Next, adjustment processing executed by the adjustment device 9 will be described. FIG. 5 is a flowchart showing an outline of adjustment processing performed by the adjustment device 9 on the endoscope 2.

  As shown in FIG. 5, the light source control unit 96 sets the type of light source (step S101), and irradiates the set light source toward the imaging unit 22 of the endoscope 2 with reference light (step S102). For example, the light source control unit 96 causes the imaging unit 22 of the endoscope 2 to emit white light from the first light source unit 93 as reference light.

  Subsequently, the amplification factor calculation unit 98 acquires an image signal from the A / D conversion unit 53 of the endoscope 2 (step S103), and the reference value recorded by the adjustment value recording unit 97 and the A / D of the endoscope 2 are recorded. Based on the level of the image signal acquired from the D conversion unit 53, the amplification factor by the GCA unit 52 is calculated (step S104).

  Thereafter, the recording control unit 99 records the gain calculated in step S104 and the type of the light source in the light source gain recording unit 551 of the endoscope 2 in association with each other (step S105).

  Thereafter, when all the light sources of the adjusting device 9 are finished (step S106: Yes), the adjusting device 9 finishes this process, and when all the light sources of the adjusting device 9 are not finished (step S106: No), the adjustment is performed. The apparatus 9 returns to step S101 described above, causes the imaging unit 22 of the endoscope 2 to irradiate each of the second light source unit 94 and the third light source unit 95 with illumination light, and the GCA unit 52 of each light source. The amplification factor calculation unit 98 calculates the amplification factor.

[Endoscope processing]
Next, a process when the endoscope 2 adjusts the amplification factor according to the type of the light source of the light source device 8 when the subject is observed using the endoscope 2 will be described. FIG. 6 is a flowchart illustrating an outline of processing executed by the endoscope 2.

  As illustrated in FIG. 6, the acquisition unit 561 acquires the light source ID from the light source ID recording unit 871 of the light source device 8 via the processor 6 (step S201), and responds to the light source ID from the light source amplification factor recording unit 551. The amplification factor by the GCA unit 52 is acquired (step S202).

  Thereafter, the amplification control unit 562 causes the GCA unit 52 to amplify the image signal with the amplification factor acquired by the acquisition unit 561 (step S203).

  Subsequently, when an instruction signal for switching the illumination light emitted from the light source device 8 is input from the input unit 64 (step S204: Yes), the acquisition unit 561 is switched according to the instruction signal input from the input unit 64. The light source ID of the illumination light obtained is acquired from the light source ID recording unit 871 of the light source device 8 (step S205). Specifically, when an instruction signal for switching the illumination light emitted from the light source device 8 from white light to narrowband light is input from the input unit 64, the acquisition unit 561 has a light source ID corresponding to the narrowband light (for example, FIG. 3 ”is obtained from the light source ID recording unit 871. After step S205, the endoscope 2 returns to step S202 described above.

  In step S204, when the instruction signal for switching the illumination light emitted from the light source device 8 is not input from the input unit 64 (step S204: No), the endoscope 2 proceeds to step S206.

  Subsequently, when the observation of the subject is finished (step S206: Yes), the endoscope 2 finishes this process, and when the observation of the subject is not finished (step S206: No), the endoscope 2 is The process returns to step S204 described above.

  According to the first embodiment of the present invention described above, the amplification control unit 562 refers to the light source amplification factor information recorded by the light source amplification factor recording unit 551, and performs amplification according to the light source information acquired by the acquisition unit 561. Since the GCA unit 52 amplifies the image signal at a rate, it is possible to prevent the amplification factor by the GCA unit 52 from varying regardless of the type of light source.

  Further, according to the first embodiment of the present invention, before the endoscope 2 is shipped, the amplification factor calculation unit 98 of the adjustment device 9 records the image signal output from the imaging unit 22 and the adjustment value recording unit 97. And the recording control unit 99 associates the amplification factor calculated by the amplification factor calculation unit 98 with the type of the light source in the light source amplification factor recording unit 551. Since recording is performed, it is possible to prevent variation in the amplification factor by the GCA unit 52 regardless of the type of light source.

  In the first embodiment of the present invention, the amplification control unit 562 refers to the light source amplification factor information recorded by the light source amplification factor recording unit 551, and uses the GCA with the amplification factor according to the light source information acquired by the acquisition unit 561. The image signal is amplified by the unit 52. For example, a plurality of amplification units that amplify the image signal are provided in the endoscope 2, and the amplification factor of these amplification units corresponds to the light source information acquired by the acquisition unit 561. You may adjust an amplification part so that it may become an amplification factor. Of course, the amplification control unit 562 distributes the amplification factor of the analog image signal by each of the transmission buffer 23, the reception amplifier 51, and the GCA unit 52 so that the amplification factor according to the light source information acquired by the acquisition unit 561 is obtained. You may make it control.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. The endoscope system according to the second embodiment is different in the configuration of the processor 6 in the endoscope system 1 according to the first embodiment described above. Furthermore, in the endoscope system according to the second embodiment, the processor adjusts the amplification factor of the GCA unit provided in the connector unit of the endoscope according to the light source of the light source device. In the following, after describing the configuration of the endoscope system according to the second embodiment, processing executed by the processor according to the second embodiment will be described. In addition, the same code | symbol is attached | subjected to the structure same as the endoscope system 1 which concerns on Embodiment 1 mentioned above, and description is abbreviate | omitted.

[Configuration of endoscope system]
FIG. 7 is a block diagram showing functions of main parts of the endoscope system according to Embodiment 2 of the present invention. An endoscope system 1a shown in FIG. 7 includes a processor 6a instead of the processor 6 of the endoscope system 1 according to the first embodiment described above. The processor 6a includes a processor control unit 66a instead of the processor control unit 66 of the processor 6 according to the first embodiment.

  The processor control unit 66a is configured using a CPU or the like, and controls each unit of the endoscope system 1a. In addition, the processor control unit 66a includes an acquisition unit 661 and an amplification control unit 662.

  The acquisition unit 661 acquires light source information from the light source device 8 connected to the processor 6a. Furthermore, the acquisition unit 661 acquires light source gain information from the light source gain recording unit 551 of the endoscope 2 connected to the processor 6a.

  The amplification control unit 662 refers to the light source amplification factor information acquired by the acquisition unit 661 from the light source amplification factor recording unit 551, and is an endoscope with an amplification factor according to the light source information acquired by the acquisition unit 661 from the light source device 8. The GCA unit 52 provided in 2 amplifies the image signal.

[Processing of the processor]
FIG. 8 is a flowchart showing an outline of processing executed by the processor 6a of the endoscope system 1a according to Embodiment 2 of the present invention.

  As shown in FIG. 8, the acquisition unit 661 first acquires the light source ID from the light source device 8 (step S301), and from the light source amplification factor recording unit 551 in the connector unit 5 of the endoscope 2 connected to the processor 6a. The amplification factor by the GCA unit 52 corresponding to the light source ID of the light source device 8 is acquired (step S302).

  Subsequently, the amplification control unit 662 adjusts the amplification factor of the image signal by the GCA unit 52 of the connector unit 5 via the connector control unit 56 based on the amplification factor acquired by the acquisition unit 661 (step S303).

  Subsequently, when an instruction signal for switching illumination light emitted from the light source device 8 is input from the input unit 64 (step S304: Yes), the acquisition unit 661 is switched according to the instruction signal input from the input unit 64. An amplification factor corresponding to the light source ID of the illumination light is acquired from the light source amplification factor recording unit 551 (step S305). After step S305, the processor 6a returns to step S302 described above.

  In step S304, when the instruction signal for switching the illumination light emitted from the light source device 8 is not input from the input unit 64 (step S304: No), the processor 6a proceeds to step S306.

  Subsequently, when the observation of the subject is finished (step S306: Yes), the processor 6a finishes this process, and when the observation of the subject is not finished (step S306: No), the processor 6a takes the steps described above. Return to S304.

  According to the second embodiment of the present invention described above, the amplification control unit 662 refers to the light source amplification factor information acquired by the acquisition unit 661 and is provided in the endoscope 2 with the amplification factor according to the light source information. Since the GCA unit 52 amplifies the image signal, it is possible to prevent variation in the amplification factor by the GCA unit 52 regardless of the type of the light source.

  Further, in Embodiment 2 of the present invention, the amplification control unit 662 refers to the light source amplification factor information recorded by the light source amplification factor recording unit 551, and uses the GCA with the amplification factor according to the light source information acquired by the acquisition unit 661. Although the image signal is amplified by the unit 52, for example, a plurality of amplification units that amplify the image signal are provided in the endoscope 2, and the amplification factor of these amplification units corresponds to the light source information acquired by the acquisition unit 661. You may adjust an amplification part so that it may become an amplification factor. Of course, the amplification control unit 662 distributes the amplification factor of the analog image signal by each of the transmission buffer 23, the reception amplifier 51, and the GCA unit 52 so that the amplification factor according to the light source information acquired by the acquisition unit 661 is obtained. You may make it control.

  Further, in Embodiment 2 of the present invention, the amplification control unit 662 refers to the light source amplification factor information recorded by the light source amplification factor recording unit 551, and uses the GCA with the amplification factor according to the light source information acquired by the acquisition unit 661. The image signal is amplified by the unit 52. For example, the amplification control unit 662 refers to the light source amplification factor information recorded by the light source amplification factor recording unit 551, and performs amplification according to the light source information acquired by the acquisition unit 661. The digital image signal may be amplified by the image processing unit 63 at a rate.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and various modifications and applications are naturally possible within the scope of the gist of the present invention. For example, in addition to the endoscope system used in the description of the present invention, the present invention can be applied to various endoscopes such as a capsule endoscope that can be orally administered from the mouth of a subject.

  Also, in this specification, in the description of each operation flowchart described above, the operation is described using “first”, “next”, “follow”, “after”, etc. for convenience. It does not mean that it is essential to implement.

  In addition, each processing method performed by the endoscope or the processor in the above-described embodiment, that is, the processing shown in each flowchart can be stored as a program that can be executed by a control unit such as a CPU. . In addition, it is stored in a storage medium of an external storage device such as a memory card (ROM card, RAM card, etc.), magnetic disk (floppy disk (registered trademark), hard disk, etc.), optical disk (CD-ROM, DVD, etc.), semiconductor memory, etc. Can be distributed. Then, a control unit such as a CPU reads the program stored in the storage medium of the external storage device, and the operation described above can be executed by the operation being controlled by the read program.

  Further, the present invention is not limited to the above-described embodiments and modifications as they are, and in the implementation stage, the constituent elements can be modified and embodied without departing from the spirit of the invention. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some constituent elements may be deleted from all the constituent elements described in the above-described embodiments and modifications. Furthermore, you may combine suitably the component demonstrated by each embodiment and the modification.

  In addition, a term described together with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term anywhere in the specification or the drawings. Thus, various modifications and applications are possible without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1,1a Endoscope system 2 Endoscope 3 Transmission cable 4 Operation part 5 Connector part 6, 6a Processor 7 Display apparatus 8 Light source apparatus 9 Adjustment apparatus 20 Tip part 21 Optical system 22 Imaging part 23 Transmission buffer 24 Timing generation part 25 Light guide 51 Reception amplifier 52 GCA section 53 A / D conversion section 54 Drive signal generation section 55 Connector recording section 56 Connector control section 61, 91 Power supply section 62, 92 Clock generation section 63 Image processing section 64 Input section 65 Processor recording section 66 , 66a processor control unit 81 light source unit 82 light source driver 83 switching filter 84 drive unit 85 drive driver 86 condensing lens 87 light source recording unit 88 illumination control unit 93 first light source unit 94 second light source unit 95 third light source unit 96 light source control Part 97 adjustment value recording part 98 gain calculation part 99 recording system Part 100 insertion portion 101 tip 102 proximal 551 light amplification factor recording unit 561,661 acquiring unit 562,662 amplification control unit 871 source ID recording unit

Claims (4)

An adjustment device that adjusts an amplification factor by an amplification unit that amplifies an image signal generated by an imaging unit provided in an endoscope ,
A light source unit having a plurality of different light sources, and sequentially irradiating the imaging unit with light emitted from each of the plurality of light sources;
A calculation unit that calculates the amplification factor of each of the plurality of light sources based on the image signal generated by each of the plurality of light sources and a preset reference value;
A recording control unit that records each of the plurality of light sources and a plurality of the amplification factors calculated by the calculation unit in a recording unit provided in the endoscope;
An adjustment device comprising: An adjustment method executed by an adjustment device that adjusts an amplification factor by an amplification unit that amplifies an image signal generated by an imaging unit provided in an endoscope,
An irradiation step of sequentially irradiating the imaging unit with light emitted from each of the plurality of light sources, the plurality of light sources different from each other;
A calculation step of calculating the amplification factor of each of the plurality of light sources based on the image signal generated by each of the plurality of light sources and a preset reference value by the imaging unit;
A recording control step of recording each of the plurality of light sources in association with the plurality of amplification factors calculated in the calculation step in a recording unit provided in the endoscope;
The adjustment method characterized by including. In an adjustment device that adjusts an amplification factor by an amplification unit that amplifies an image signal generated by an imaging unit provided in an endoscope,
An irradiation step of sequentially irradiating the imaging unit with light emitted from each of the plurality of light sources, the plurality of light sources different from each other;
A calculation step of calculating the amplification factor of each of the plurality of light sources based on the image signal generated by each of the plurality of light sources and a preset reference value by the imaging unit;
A recording control step of recording each of the plurality of light sources in association with the plurality of amplification factors calculated in the calculation step in a recording unit provided in the endoscope;
A program characterized by having executed. A recording medium on which the program according to claim 3 is recorded.

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