WO2017061289A1 - Endoscope-use processing device and calculation processing method - Google Patents

Endoscope-use processing device and calculation processing method Download PDF

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Publication number
WO2017061289A1
WO2017061289A1 PCT/JP2016/078241 JP2016078241W WO2017061289A1 WO 2017061289 A1 WO2017061289 A1 WO 2017061289A1 JP 2016078241 W JP2016078241 W JP 2016078241W WO 2017061289 A1 WO2017061289 A1 WO 2017061289A1
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Prior art keywords
endoscope
filter
processing
image
imaging device
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PCT/JP2016/078241
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French (fr)
Japanese (ja)
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幸子 大倉
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オリンパス株式会社
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Definitions

  • the present invention relates to an endoscope processing apparatus and an arithmetic processing method.
  • an endoscope system is used for observation inside a subject.
  • Various endoscopes are connected to a processor that processes an image signal picked up by an endoscope if the standard of a connection connector or a transmission system matches the standard of the endoscope.
  • the processor may be connected to a camera head that combines a fiberscope that uses optical fibers.
  • a fiber bundle made up of multiple optical fibers is used as an image guide that transmits the optical image formed at the tip to the rear end, and the camera head is connected to the eyepiece of the fiberscope.
  • the imaging device of the camera head captures an optical image transmitted by the image guide fiber bundle to generate an image signal, and outputs the generated image signal to the processor.
  • the present invention has been made in view of the above, and an object of the present invention is to provide an endoscope processing apparatus and an arithmetic processing method that perform moire removal processing only when moire removal processing is necessary.
  • an endoscope processing apparatus transmits at least an optical image formed by an objective optical system at the distal end of the endoscope to the rear end side.
  • a first imaging device including an image guide fiber bundle and having an imaging device that captures the optical image transmitted by the image guide fiber bundle and generates an image signal; and a second imaging device different from the first imaging device Is an endoscope processing apparatus that is configured to be detachable exclusively and that processes the image signal, and performs different computations depending on the type of endoscope attached to the endoscope processing apparatus.
  • a filter processing unit that performs a filter operation with a coefficient is provided.
  • the filter processing unit when the attached endoscope is the first imaging device, the filter processing unit performs low-pass filter processing on the image signal.
  • a filter coefficient is set in the filter processing unit as the coefficient of the calculation, and the filter processing unit performs enhancement processing on the image signal when the attached endoscope is the second imaging device.
  • a filter coefficient setting unit that sets the filter coefficient as a coefficient of the calculation in the filter processing unit.
  • the filter coefficient setting unit may be any one of a plurality of low-pass filter coefficients having different threshold values in the low-pass filter process as a filter coefficient for performing the low-pass filter process. Is set in the filter processing unit.
  • the endoscope processing apparatus further includes an input unit that receives input of intensity instruction information that indicates the intensity of the low-pass filter process, and the filter coefficient setting unit has a threshold value of the low-pass filter process.
  • the filter coefficient setting unit has a threshold value of the low-pass filter process.
  • the endoscope processing device includes an identification unit that identifies whether the imaging device mounted on the endoscope processing device is the first imaging device or the second imaging device.
  • the filter coefficient setting unit sets a filter coefficient based on the identification result in the identification unit in the filter processing unit.
  • the arithmetic processing method includes an image guide fiber bundle that transmits at least an optical image formed by the objective optical system at the distal end of the endoscope to the rear end side, and is transmitted by the image guide fiber bundle.
  • a first imaging device having an imaging device that captures the optical image and generates an image signal, and a second imaging device different from the first imaging device are configured to be detachable exclusively, and the image signal Comprising:
  • At least an image guide fiber bundle that transmits an optical image formed by the objective optical system at the distal end of the endoscope to the rear end side is provided, and an optical image transmitted by the image guide fiber bundle is captured.
  • a first imaging device having an imaging element that generates an image signal and a second imaging device that is different from the first imaging device are mounted on an endoscope processing device that is exclusively detachable.
  • FIG. 1 is a schematic diagram showing a schematic configuration of an endoscope system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram illustrating a schematic configuration of the endoscope system according to the embodiment of the present invention.
  • FIG. 3 is a flowchart showing a processing procedure of filter coefficient setting processing in the processor shown in FIG.
  • FIG. 4 is a diagram showing a processing procedure of the filter coefficient setting process shown in FIG.
  • FIG. 5 is a diagram showing another processing procedure of the filter coefficient setting process shown in FIG.
  • FIG. 6 is a schematic diagram illustrating a schematic configuration of the endoscope system according to the second modification of the embodiment.
  • FIG. 1 and 2 are schematic views showing a schematic configuration of an endoscope system according to an embodiment of the present invention.
  • an endoscope system 1 includes a first endoscope 2A (first imaging device) and a second endoscope as endoscopes for introduction into a subject. Any one of the endoscope 2B (second imaging device) can be connected to the processor 3 (endoscopic processing device) and transmitted from the attached first endoscope 2A or second endoscope 2B.
  • a processor 3 that performs predetermined image processing on the image signal and a display device 4 that displays an image corresponding to the image signal from the first endoscope 2A or the second endoscope 2B are provided.
  • Both the first endoscope 2A and the second endoscope 2B are introduced into the subject, and image the inside of the subject to generate an image signal in the subject.
  • the first endoscope 2A includes an optical endoscope using a method of transmitting an optical image with an optical fiber bundle, and a camera head corresponding to the optical endoscope.
  • the first endoscope 2A includes a camera head 21A and an image guide fiber bundle 22A that transmits an optical image formed by the objective optical system at the distal end of the endoscope to the rear end side.
  • the camera head 21A is an image sensor 23A that captures an optical image that is transmitted by the image guide fiber bundle 22A and is output from the eyepiece, and generates an image signal.
  • the information indicates that the camera head 21A is compatible with the fiber bundle.
  • a memory 24A for storing various types of identification information of the first endoscope 2A.
  • the image pickup device 23A is a CMOS image pickup device or a CCD image pickup device.
  • a plurality of pixels that receive light from a subject irradiated with light on a light receiving surface and photoelectrically convert the received light to generate an image pickup signal is a matrix. Arranged.
  • the imaging element 23A performs noise removal processing, clamping processing, and A / D conversion processing on the imaging signal (analog) generated by the plurality of pixels, and outputs the imaging signal (digital) to the processor 3 via the electric cable. .
  • the second endoscope 2B is a so-called electronic endoscope in which an image pickup device 23B is provided at the distal end of the insertion portion 22B, and an operation portion 21B provided with an operation switch (not shown) and the like, and an image pickup device 23B provided at the distal end. Insertion portion 22B.
  • the image pickup device 23B is a CMOS image pickup device or a CCD image pickup device like the image pickup device 23A.
  • the operation unit 21B is provided with a memory 24B that stores various types of identification information of the second endoscope 2B including information indicating that the second endoscope 2B is a so-called electronic endoscope.
  • the processor 3 is configured such that the first endoscope 2A and the second endoscope 2B are exclusively detachably attached, and an image signal transmitted from the attached first endoscope 2A or the second endoscope 2B. Is subjected to predetermined image processing to generate an in-vivo image.
  • the processor 3 causes the display device 4 to display and output the generated in-vivo image.
  • the processor 3 includes an image processing unit 31, a control unit 32, a storage unit 33, and an input unit 34. Note that the processor 3 includes a light source (not shown) for supplying illumination light to the attached endoscope.
  • the image processing unit 31 performs predetermined image processing on the image signal output from the image sensor of the attached endoscope.
  • the image processing unit 31 performs an optical black (OB) subtraction process, a demosaicing process, a white balance (WB) adjustment process, an electronic zoom process, an image on an image signal (digital) output from the image sensor of the attached endoscope.
  • An image signal obtained by performing enhancement processing, mask processing, on-screen display (OSD) processing, display image conversion processing, and the like is output.
  • the image processing unit 31 includes an image enhancement unit 312 that performs image enhancement processing, a first image processing unit 311 that performs image processing prior to image enhancement processing, and a second image processing unit that performs image processing subsequent to image enhancement processing. 314.
  • the image enhancement unit 312 includes a filter 313 (filter processing unit) that performs a filter operation with different calculation coefficients depending on the type of the endoscope attached to the processor 3.
  • the filter 313 performs filter operation (matrix operation) on the pixel block of n ⁇ m pixels (n and m are positive integers) centered on the pixel of interest according to the set coefficient, thereby The processing result is calculated, and the calculation is performed for all pixels while shifting the pixel position of interest one pixel at a time.
  • the filter 313 performs image enhancement filter processing when a coefficient for image enhancement is set, and LPF processing (moire removal) when a coefficient for low-pass filter (LPF) processing is set. Process).
  • the control unit 32 is realized using a CPU or the like.
  • the control unit 32 controls the processing operation of each part of the processor 3 by transferring instruction information and data to each component of the processor 3.
  • the control unit 32 connects to the imaging element 23A and the memory 24A of the first endoscope 2A via each cable, and performs imaging. It also controls the element 23A and the memory 24A.
  • the control unit 32 is connected to the imaging element 23B and the memory 24B of the second endoscope 2B via each cable, and performs imaging.
  • the device 23B and the memory 24B are also controlled.
  • the control unit 32 includes an endoscope identification unit 321 and a filter coefficient setting unit 322.
  • the endoscope identification unit 321 identifies whether the endoscope mounted on the processor 3 is the first endoscope 2A or the second endoscope 2B.
  • the processor 3 identifies the type of the attached endoscope by performing communication processing with the endoscope attached to the processor 3.
  • the endoscope identification unit 321 acquires identification information Ia (see FIG. 1) of the first endoscope 2A by performing communication processing with the memory 24A of the first endoscope 2A.
  • the endoscope identification unit 321 acquires the identification information Ib (see FIG. 2) of the second endoscope 2B by performing communication processing with the memory 24B of the second endoscope 2B.
  • the endoscope identifying unit 321 identifies whether the endoscope connected to the processor 3 is the first endoscope 2A or the second endoscope 2B based on the acquired identification information.
  • the filter coefficient setting unit 322 sets a filter coefficient based on the identification result in the endoscope identification unit 321 in the filter 313 of the image enhancement unit 312.
  • the filter coefficient setting unit 322 filters the filter coefficient Pa (see FIG. 1) for the filter 313 to perform LPF processing on the image signal.
  • the filter coefficient setting unit 322 sets a filter coefficient Pb for the filter 313 to perform enhancement processing on the image signal in the filter 313.
  • the storage unit 33 is realized by using a volatile memory or a nonvolatile memory, and stores various programs for operating the processor 3.
  • the storage unit 33 temporarily stores information being processed by the processor 3.
  • the storage unit 33 stores an image signal or the like output from an endoscope connected to the processor 3.
  • the storage unit 33 may be configured using a memory card or the like attached from the outside of the processor 3.
  • the storage unit 33 is provided with a filter coefficient storage unit 331 and stores filter coefficients respectively corresponding to various types of endoscopes.
  • the filter coefficient setting unit 322 executes parameter read instructions Ta and Tb on the filter coefficient storage unit 331 in accordance with the identification result in the endoscope identification unit 321, so that the filter coefficient Pa or the filter coefficient Pa or Read the filter coefficient Pb.
  • the filter coefficient setting unit 322 sets the read filter coefficient Pa or filter coefficient Pb in the filter 313.
  • the input unit 34 receives input of various instruction information, and inputs the received various instruction information to the control unit 32.
  • the input unit 34 receives input of patient data (for example, ID, date of birth, name, etc.) related to a patient as a subject, and data such as examination contents.
  • the input unit 34 may be an operation device such as a button or a touch panel provided on the front panel of the processor 3, or may be realized using an operation device such as a mouse and a keyboard connected to the processor 3.
  • the switch etc. which were provided in the holding part of the made endoscope may be sufficient.
  • the input unit 34 may be one in which instruction information is input by remote operation from a portable terminal device such as a tablet terminal device.
  • the display device 4 is configured using a display or the like using liquid crystal or organic EL.
  • the display device 4 displays various information including a display image output from the processor 3.
  • FIG. 3 is a flowchart showing a processing procedure of filter coefficient setting processing in the processor 3.
  • the control unit 32 determines whether or not an endoscope is attached to the processor 3 (step S1). When determining that the endoscope is not attached to the processor 3 (step S1: No), the control unit 32 returns to step S1 and performs the determination process of step S1.
  • the control unit 32 determines that the endoscope is attached to the processor 3 (step S1: Yes)
  • the endoscope identification unit 321 indicates that the endoscope attached to the processor 3 is the first endoscope 2A.
  • the second endoscope 2B are subjected to endoscope identification processing (step S2), and the identification result is output to the filter coefficient setting unit 322.
  • the filter coefficient setting unit 322 performs a filter coefficient setting process for setting the filter coefficient based on the identification result in the endoscope identification unit 321 in the filter 313 (step S3).
  • the filter 313 of the image enhancement unit 312 performs a filter process for performing a filter operation on the input image signal in accordance with the set filter coefficient (step S4). Therefore, in step S ⁇ b> 4, the filter 313 performs a filter operation using different calculation coefficients depending on the type of the endoscope attached to the processor 3.
  • FIG. 4 is a diagram showing a processing procedure of the filter coefficient setting process shown in FIG.
  • the filter coefficient setting unit 322 determines whether the type of endoscope attached to the processor 3 is the first endoscope 2A or the second endoscope based on the identification result of the endoscope identification unit 321. It is determined which is the endoscope 2B (step S11).
  • the filter coefficient setting unit 322 determines that the type of the endoscope attached to the processor 3 is the first endoscope 2A (step S11: first endoscope)
  • the filter coefficient storage unit 331 receives the LPF.
  • a filter coefficient Pa for processing is acquired (step S12).
  • the filter coefficient setting unit 322 determines that the type of the endoscope attached to the processor 3 is the second endoscope 2B (step S11: second endoscope)
  • the filter coefficient setting unit 322 emphasizes from the filter coefficient storage unit 331.
  • a filter coefficient Pb for processing is acquired (step S13).
  • the filter coefficient setting unit 322 sets the acquired coefficient in the filter 313 (step S14), ends the filter coefficient setting process, and returns to the main routine of FIG.
  • the endoscope connected to the processor 3 includes the first endoscope 2A having a fiberscope-compatible camera head, and the second endoscope not compatible with the fiberscope.
  • the filter 313 that performs the filter operation with different calculation coefficients depending on whether it is 2B or not, a processor that can execute the moire removal processing only when the moire removal processing is necessary can be realized.
  • the filter coefficient Pa for LPF processing is set in the filter 313, and the fiberscope
  • the filter coefficient Pb for enhancement processing is set in the filter 313. Therefore, according to the present embodiment, the moiré removal processing is performed according to the type of the endoscope by switching only the filter coefficient of the filter without changing the filter for LPF processing. And image enhancement processing can be executed exclusively.
  • the input unit 34 can accept input of strength instruction information for instructing the strength of LPF processing in accordance with a user operation.
  • the threshold value (threshold value) of the cutoff frequency in LPF processing is determined according to the strength of LPF processing.
  • the filter coefficient storage unit 331 stores a plurality of filter coefficients for LPF processing at least having different cutoff frequency thresholds according to the strength of the LPF processing. For example, when the intensity of the LPF process is high, a value lower than the threshold of the cut-off frequency used when the intensity of the LPF process is weak is used as the cut-off frequency threshold of the filter coefficients for the LPF process. It is stored in the coefficient storage unit 331.
  • the filter coefficient setting unit 322 includes a plurality of LPF coefficients having different cutoff frequency threshold values in the LPF process corresponding to the intensity indicated by the intensity instruction information input from the input unit 34 as filter coefficients for performing the LPF process. Either one is set in the filter 313.
  • FIG. 5 is a diagram showing another processing procedure of the filter coefficient setting process shown in FIG.
  • Steps S21 and 25 shown in FIG. 5 are steps S11 and 13 shown in FIG.
  • the filter coefficient setting unit 322 determines that the type of the endoscope attached to the processor 3 is the first endoscope 2A (step S21: first endoscope)
  • the filter coefficient setting unit 322 is input from the input unit 34.
  • it is determined whether to instruct stronger or weaker as the intensity of the LPF process (step S22).
  • the filter coefficient setting unit 322 determines to instruct to increase the intensity of the LPF process (step S22: higher)
  • the filter coefficient setting unit 322 acquires the filter coefficient for the LPF enhancement process from the filter coefficient storage unit 331 (step S23).
  • step S22 determines to instruct weakening as the intensity of the LPF process (step S22: weak)
  • the filter coefficient setting unit 322 acquires the filter coefficient for the LPF weakening process from the filter coefficient storage unit 331 (step S24).
  • Step S26 shown in FIG. 5 is step S14 shown in FIG.
  • the filter coefficient setting unit 322 can set the LPF coefficient including the cutoff frequency threshold corresponding to the intensity indicated by the intensity instruction information input from the input unit 34 in the filter 313. You may do it.
  • FIG. 6 is a schematic diagram illustrating a schematic configuration of the endoscope system according to the second modification of the embodiment.
  • the filter coefficient 125 ⁇ / b> A used in the filter process for the image signal captured by the first endoscope 12 ⁇ / b> A is stored in the memory 124 ⁇ / b> A in the camera head 121 ⁇ / b> A of the first endoscope 12 ⁇ / b> A. It is remembered. Similarly, the memory 124B in the operation unit 121B of the second endoscope 12B stores a filter coefficient 125B used at the time of filter processing for the image signal captured by the second endoscope 12B.
  • the control unit 132 of the processor 103 performs identification processing of the endoscope from the memory 124A or the memory 124B by performing communication processing with the memory 124A or the memory 124B of the connected endoscope when the endoscope is connected. Together with the information, the filter coefficient 125A or the filter coefficient 125B is read out.
  • the filter coefficient setting unit 1322 sets the filter coefficient read by the control unit 132 from the memory 124A or the memory 124B in the filter 313.
  • the endoscope identification unit 321 shown in FIG. 1 can be deleted, and the endoscope identification process (steps) in the processing procedure up to the setting of the filter coefficient shown in FIG. S2) becomes unnecessary.
  • the first endoscope 2A may be a hybrid endoscope that captures an optical image transmitted by an optical fiber with an image sensor provided at the optical fiber base end.
  • the second endoscope 2B may be a soft or hard endoscope with an insertion portion. Alternatively, the second endoscope 2B may have a camera head that is not assumed to be connected to an optical endoscope.
  • the processors 3 and 103 may be configured such that the processor and the light source device are separate.
  • an execution program for each process executed by the processors 3 and 103 is an installable format or executable file, and is a computer such as a CD-ROM, flexible disk, CD-R, or DVD. It may be configured to be provided by being recorded on a recording medium readable by the Internet, or may be configured to be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. .

Abstract

The purpose of the present invention is to provide an endoscope-use processing device and a calculation processing method with which moire removal processing is carried out only if moire removal processing is necessary. Provided is an endoscope-use processing device for processing image signals: in which a processor 3 comprises at least an image guide fiber bundle for transmitting an optical image formed by an objective optical system at the distal end of an endoscope to the base end thereof; and in which a first endoscope 2A and a second endoscope 2B are configured so as to be exclusively removable, such endoscopes each including an image capture element for capturing the optical image transmitted by the image guide fiber bundle and thereby generating an image signal. The endoscope-use processing device is provided with a filter 313 that performs filter calculation using a different calculation coefficient depending on the type of endoscope mounted to the processor 3.

Description

内視鏡用処理装置及び演算処理方法Endoscope processing apparatus and arithmetic processing method
　本発明は、内視鏡用処理装置及び演算処理方法に関する。 The present invention relates to an endoscope processing apparatus and an arithmetic processing method.
　従来、医療分野においては、被検体内部の観察のために内視鏡システムが用いられている。内視鏡によって撮像された画像信号を処理するプロセッサには、接続コネクタや伝送システムの規格が内視鏡の規格と一致すれば各種の内視鏡が接続されるようになっている。 Conventionally, in the medical field, an endoscope system is used for observation inside a subject. Various endoscopes are connected to a processor that processes an image signal picked up by an endoscope if the standard of a connection connector or a transmission system matches the standard of the endoscope.
　プロセッサには、ビデオスコープが接続されるほか、光ファイバーが用いられたファイバースコープを組み合わせたカメラヘッドが接続される場合もある。この場合には、複数本の光学ファイバーを束ねて構成したファイバーバンドルを、先端で結像された光学像を後端側へ伝送するイメージガイドとして用い、ファイバースコープの接眼部にカメラヘッドを接続する。カメラヘッドの撮像素子は、イメージガイドファイバーバンドルにより伝送された光学像を撮像して画像信号を生成し、プロセッサに生成した画像信号を出力する。 In addition to a videoscope, the processor may be connected to a camera head that combines a fiberscope that uses optical fibers. In this case, a fiber bundle made up of multiple optical fibers is used as an image guide that transmits the optical image formed at the tip to the rear end, and the camera head is connected to the eyepiece of the fiberscope. To do. The imaging device of the camera head captures an optical image transmitted by the image guide fiber bundle to generate an image signal, and outputs the generated image signal to the processor.
　このイメージガイドファイバーバンドルとカメラヘッドとを組み合わせて画像を観察する場合、ファイバーバンドルの網目（光学ファイバーを束ねたことによる網目）と、カメラヘッドの撮像素子の画素との干渉によって縞模様のモアレが発生することがある。このため、イメージガイドファイバーバンドルとカメラヘッドとを組み合わせる場合には、ローパスフィルタ（ＬＰＦ：Low　Pass　Filter）処理やデフォーカスの画像処理を実施することでモアレを低減できる。近年、ビデオプロセッサにカメラヘッドが接続されたことを検出した場合にはフィルタ処理の係数をモアレ除去処理（ＬＰＦ処理）用の係数とし、その他の場合にはフィルタ係数をエンハンス処理用の係数として設定する構成が提案されている（例えば、特許文献１参照）。 When an image is observed by combining this image guide fiber bundle and a camera head, a striped moire pattern is generated due to interference between the fiber bundle mesh (a mesh formed by bundling optical fibers) and the image sensor pixels of the camera head. May occur. For this reason, when combining an image guide fiber bundle and a camera head, moire can be reduced by performing a low pass filter (LPF) process or a defocus image process. In recent years, when it is detected that a camera head is connected to a video processor, the filter processing coefficient is set as a coefficient for moire removal processing (LPF processing), and in other cases, the filter coefficient is set as a coefficient for enhancement processing. The structure which performs is proposed (for example, refer patent document 1).
国際公開第２０１５／０２５６９７号International Publication No. 2015/025697
　しかしながら、特許文献１記載の構成では、カメラヘッドが接続された場合には一律にモアレ除去処理用の係数が設定されてしまう。したがって、特許文献１記載の構成では、ファイバースコープ対応カメラヘッドではなくファイバースコープ非対応カメラヘッドが接続されモアレ除去処理が不要な場合にも、モアレ除去処理用の係数が設定されてしまい、画質劣化を招くという問題があった。 However, in the configuration described in Patent Document 1, when a camera head is connected, a coefficient for moire removal processing is uniformly set. Therefore, in the configuration described in Patent Document 1, even when a camera head that is not compatible with a fiberscope is connected instead of a camera head that is compatible with a fiberscope and moire removal processing is not required, a coefficient for moire removal processing is set, resulting in image quality degradation. There was a problem of inviting.
　本発明は、上記に鑑みてなされたものであって、モアレ除去処理が必要な場合にのみモアレ除去処理を実行する内視鏡用処理装置及び演算処理方法を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide an endoscope processing apparatus and an arithmetic processing method that perform moire removal processing only when moire removal processing is necessary.
　上述した課題を解決し、目的を達成するために、本発明にかかる内視鏡用処理装置は、少なくとも、内視鏡先端の対物光学系で結像された光学像を後端側へ伝送するイメージガイドファイバーバンドルを備えるとともに該イメージガイドファイバーバンドルにより伝送された前記光学像を撮像して画像信号を生成する撮像素子を有する第１撮像装置と、前記第１撮像装置とは異なる第２撮像装置とが、排他的に着脱自在に構成され、前記画像信号を処理する内視鏡用処理装置であって、当該内視鏡用処理装置に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行うフィルタ処理部を備えたことを特徴とする。 In order to solve the above-described problems and achieve the object, an endoscope processing apparatus according to the present invention transmits at least an optical image formed by an objective optical system at the distal end of the endoscope to the rear end side. A first imaging device including an image guide fiber bundle and having an imaging device that captures the optical image transmitted by the image guide fiber bundle and generates an image signal; and a second imaging device different from the first imaging device Is an endoscope processing apparatus that is configured to be detachable exclusively and that processes the image signal, and performs different computations depending on the type of endoscope attached to the endoscope processing apparatus. A filter processing unit that performs a filter operation with a coefficient is provided.
　また、本発明にかかる内視鏡用処理装置は、前記装着された内視鏡が前記第１撮像装置である場合には前記フィルタ処理部が前記画像信号に対してローパスフィルタ処理を施すためのフィルタ係数を前記演算の係数として前記フィルタ処理部に設定し、前記装着された内視鏡が前記第２撮像装置である場合には前記フィルタ処理部が前記画像信号に対して強調処理を施すためのフィルタ係数を前記演算の係数として前記フィルタ処理部に設定するフィルタ係数設定部をさらに備えたことを特徴とする。 In the endoscope processing device according to the present invention, when the attached endoscope is the first imaging device, the filter processing unit performs low-pass filter processing on the image signal. A filter coefficient is set in the filter processing unit as the coefficient of the calculation, and the filter processing unit performs enhancement processing on the image signal when the attached endoscope is the second imaging device. A filter coefficient setting unit that sets the filter coefficient as a coefficient of the calculation in the filter processing unit.
　また、本発明にかかる内視鏡用処理装置は、前記フィルタ係数設定部は、前記ローパスフィルタ処理を施すためのフィルタ係数として、前記ローパスフィルタ処理における閾値が異なる複数のローパスフィルタ係数のいずれか一つを前記フィルタ処理部に設定することを特徴とする。 In the endoscope processing device according to the present invention, the filter coefficient setting unit may be any one of a plurality of low-pass filter coefficients having different threshold values in the low-pass filter process as a filter coefficient for performing the low-pass filter process. Is set in the filter processing unit.
　また、本発明にかかる内視鏡用処理装置は、前記ローパスフィルタ処理の強度を指示する強度指示情報の入力を受け付ける入力部をさらに備え、前記フィルタ係数設定部は、前記ローパスフィルタ処理の閾値が異なる複数のローパスフィルタ係数のうち、前記入力部から入力された強度指示情報が指示する強度に対応したローパスフィルタ係数を前記フィルタ処理部に設定することを特徴とする。 The endoscope processing apparatus according to the present invention further includes an input unit that receives input of intensity instruction information that indicates the intensity of the low-pass filter process, and the filter coefficient setting unit has a threshold value of the low-pass filter process. Among the plurality of different low-pass filter coefficients, a low-pass filter coefficient corresponding to the intensity indicated by the intensity instruction information input from the input unit is set in the filter processing unit.
　また、本発明にかかる内視鏡用処理装置は、当該内視鏡用処理装置に装着された撮像装置が、前記第１撮像装置と第２撮像装置とのいずれであるかを識別する識別部をさらに備え、前記フィルタ係数設定部は、前記識別部における識別結果に基づいたフィルタ係数を前記フィルタ処理部に設定することを特徴とする。 In addition, the endoscope processing device according to the present invention includes an identification unit that identifies whether the imaging device mounted on the endoscope processing device is the first imaging device or the second imaging device. The filter coefficient setting unit sets a filter coefficient based on the identification result in the identification unit in the filter processing unit.
　また、本発明にかかる演算処理方法は、少なくとも、内視鏡先端の対物光学系で結像された光学像を後端側へ伝送するイメージガイドファイバーバンドルを備えるとともに該イメージガイドファイバーバンドルにより伝送された前記光学像を撮像して画像信号を生成する撮像素子を有する第１撮像装置と、前記第１撮像装置とは異なる第２撮像装置とが、排他的に着脱自在に構成され、前記画像信号を処理する内視鏡用処理装置が行う演算処理方法であって、前記内視鏡用処理装置に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行うフィルタ処理を含むことを特徴とする。 In addition, the arithmetic processing method according to the present invention includes an image guide fiber bundle that transmits at least an optical image formed by the objective optical system at the distal end of the endoscope to the rear end side, and is transmitted by the image guide fiber bundle. A first imaging device having an imaging device that captures the optical image and generates an image signal, and a second imaging device different from the first imaging device are configured to be detachable exclusively, and the image signal Comprising: A processing method performed by an endoscope processing apparatus that performs processing, including a filter process for performing a filter operation with different calculation coefficients depending on the type of endoscope attached to the endoscope processing apparatus It is characterized by that.
　本発明によれば、少なくとも、内視鏡先端の対物光学系で結像された光学像を後端側へ伝送するイメージガイドファイバーバンドルを備えるとともに該イメージガイドファイバーバンドルにより伝送された光学像を撮像して画像信号を生成する撮像素子を有する第１撮像装置と、第１撮像装置とは異なる第２撮像装置とが、排他的に着脱自在に構成される内視鏡用処理装置に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行うことによって、モアレ除去処理が必要な場合にのみモアレ除去処理を実行することが可能になる。 According to the present invention, at least an image guide fiber bundle that transmits an optical image formed by the objective optical system at the distal end of the endoscope to the rear end side is provided, and an optical image transmitted by the image guide fiber bundle is captured. A first imaging device having an imaging element that generates an image signal and a second imaging device that is different from the first imaging device are mounted on an endoscope processing device that is exclusively detachable. By performing the filter operation with different calculation coefficients depending on the type of endoscope, it is possible to execute the moire removal processing only when the moire removal processing is necessary.
図１は、本発明の実施の形態にかかる内視鏡システムの概略構成を示す模式図である。FIG. 1 is a schematic diagram showing a schematic configuration of an endoscope system according to an embodiment of the present invention. 図２は、本発明の実施の形態にかかる内視鏡システムの概略構成を示す模式図である。FIG. 2 is a schematic diagram illustrating a schematic configuration of the endoscope system according to the embodiment of the present invention. 図３は、図１に示すプロセッサにおけるフィルタ係数設定処理の処理手順を示すフローチャートである。FIG. 3 is a flowchart showing a processing procedure of filter coefficient setting processing in the processor shown in FIG. 図４は、図３に示すフィルタ係数設定処理の処理手順を示す図である。FIG. 4 is a diagram showing a processing procedure of the filter coefficient setting process shown in FIG. 図５は、図３に示すフィルタ係数設定処理の他の処理手順を示す図である。FIG. 5 is a diagram showing another processing procedure of the filter coefficient setting process shown in FIG. 図６は、実施の形態の変形例２にかかる内視鏡システムの概略構成を示す模式図である。FIG. 6 is a schematic diagram illustrating a schematic configuration of the endoscope system according to the second modification of the embodiment.
　以下の説明では、本発明を実施するための形態（以下、「実施の形態」という）として、医療用の内視鏡システムについて説明する。また、この実施の形態により、この発明が限定されるものではない。さらに、図面の記載において、同一部分には同一の符号を付している。 In the following description, a medical endoscope system will be described as a mode for carrying out the present invention (hereinafter referred to as “embodiment”). Moreover, this invention is not limited by this embodiment. Furthermore, the same code | symbol is attached | subjected to the same part in description of drawing.
（実施の形態）
　図１及び図２は、本発明の実施の形態にかかる内視鏡システムの概略構成を示す模式図である。 (Embodiment)
1 and 2 are schematic views showing a schematic configuration of an endoscope system according to an embodiment of the present invention.
　図１及び図２に示すように、本実施の形態にかかる内視鏡システム１は、被検体内導入用の内視鏡として、第１内視鏡２Ａ（第１撮像装置）と第２内視鏡２Ｂ（第２撮像装置）とのいずれかがプロセッサ３（内視鏡用処理装置）に接続可能であり、装着された第１内視鏡２Ａまたは第２内視鏡２Ｂから送信される画像信号に対して所定の画像処理を行うプロセッサ３と、第１内視鏡２Ａまたは第２内視鏡２Ｂによる画像信号に対応した映像を表示する表示装置４と、を備える。 As shown in FIGS. 1 and 2, an endoscope system 1 according to the present embodiment includes a first endoscope 2A (first imaging device) and a second endoscope as endoscopes for introduction into a subject. Any one of the endoscope 2B (second imaging device) can be connected to the processor 3 (endoscopic processing device) and transmitted from the attached first endoscope 2A or second endoscope 2B. A processor 3 that performs predetermined image processing on the image signal and a display device 4 that displays an image corresponding to the image signal from the first endoscope 2A or the second endoscope 2B are provided.
　第１内視鏡２Ａ及び第２内視鏡２Ｂは、いずれも、被検体内に導入され、被検体の体内を撮像して被検体内の画像信号を生成する。第１内視鏡２Ａは、光ファイバーバンドルで光学像を伝送する方式を用いる光学式内視鏡と、光学式内視鏡に対応したカメラヘッドとから成る。言い換えると、第１内視鏡２Ａは、カメラヘッド２１Ａと、内視鏡先端の対物光学系で結像された光学像を後端側へ伝送するイメージガイドファイバーバンドル２２Ａとを備える。 Both the first endoscope 2A and the second endoscope 2B are introduced into the subject, and image the inside of the subject to generate an image signal in the subject. The first endoscope 2A includes an optical endoscope using a method of transmitting an optical image with an optical fiber bundle, and a camera head corresponding to the optical endoscope. In other words, the first endoscope 2A includes a camera head 21A and an image guide fiber bundle 22A that transmits an optical image formed by the objective optical system at the distal end of the endoscope to the rear end side.
　カメラヘッド２１Ａは、イメージガイドファイバーバンドル２２Ａにより伝送され接眼部から出力される光学像を撮像して画像信号を生成する撮像素子２３Ａと、該カメラヘッド２１Ａがファイバーバンドル対応であることを示す情報を含む第１内視鏡２Ａの各種識別情報を記憶するメモリ２４Ａとを有する。撮像素子２３Ａは、ＣＭＯＳ撮像素子やＣＣＤ撮像素子であり、受光面に、光が照射された被写体からの光を受光し、受光した光を光電変換して撮像信号を生成する複数の画素が行列状に配置される。撮像素子２３Ａは、複数の画素が生成した撮像信号（アナログ）に、ノイズ除去処理、クランプ処理及びＡ／Ｄ変換処理を行い、撮像信号（デジタル）として、電気ケーブルを介してプロセッサ３に出力する。 The camera head 21A is an image sensor 23A that captures an optical image that is transmitted by the image guide fiber bundle 22A and is output from the eyepiece, and generates an image signal. The information indicates that the camera head 21A is compatible with the fiber bundle. And a memory 24A for storing various types of identification information of the first endoscope 2A. The image pickup device 23A is a CMOS image pickup device or a CCD image pickup device. A plurality of pixels that receive light from a subject irradiated with light on a light receiving surface and photoelectrically convert the received light to generate an image pickup signal is a matrix. Arranged. The imaging element 23A performs noise removal processing, clamping processing, and A / D conversion processing on the imaging signal (analog) generated by the plurality of pixels, and outputs the imaging signal (digital) to the processor 3 via the electric cable. .
　第２内視鏡２Ｂは、挿入部２２Ｂ先端に撮像素子２３Ｂが設けられる所謂電子内視鏡であり、操作スイッチ（不図示）等が設けられた操作部２１Ｂと、先端に撮像素子２３Ｂが設けられた挿入部２２Ｂとを備える。撮像素子２３Ｂは、撮像素子２３Ａと同様に、ＣＭＯＳ撮像素子やＣＣＤ撮像素子である。操作部２１Ｂには、該第２内視鏡２Ｂが、所謂電子内視鏡であることを示す情報を含む第２内視鏡２Ｂの各種識別情報を記憶するメモリ２４Ｂが設けられる。 The second endoscope 2B is a so-called electronic endoscope in which an image pickup device 23B is provided at the distal end of the insertion portion 22B, and an operation portion 21B provided with an operation switch (not shown) and the like, and an image pickup device 23B provided at the distal end. Insertion portion 22B. The image pickup device 23B is a CMOS image pickup device or a CCD image pickup device like the image pickup device 23A. The operation unit 21B is provided with a memory 24B that stores various types of identification information of the second endoscope 2B including information indicating that the second endoscope 2B is a so-called electronic endoscope.
　プロセッサ３は、第１内視鏡２Ａと第２内視鏡２Ｂとが排他的に着脱自在に装着され、装着された第１内視鏡２Ａまたは第２内視鏡２Ｂから送信される画像信号に対して所定の画像処理を施し、体内画像を生成する。プロセッサ３は、生成した体内画像を表示装置４に表示出力させる。 The processor 3 is configured such that the first endoscope 2A and the second endoscope 2B are exclusively detachably attached, and an image signal transmitted from the attached first endoscope 2A or the second endoscope 2B. Is subjected to predetermined image processing to generate an in-vivo image. The processor 3 causes the display device 4 to display and output the generated in-vivo image.
　プロセッサ３は、画像処理部３１、制御部３２、記憶部３３及び入力部３４を備える。なお、プロセッサ３は、装着された内視鏡に照明光を供給するための光源（不図示）を有する。 The processor 3 includes an image processing unit 31, a control unit 32, a storage unit 33, and an input unit 34. Note that the processor 3 includes a light source (not shown) for supplying illumination light to the attached endoscope.
　画像処理部３１は、装着された内視鏡の撮像素子から出力された画像信号に対し、所定の画像処理を施す。画像処理部３１は、装着された内視鏡の撮像素子から出力された画像信号（デジタル）に対するオプティカルブラック（ＯＢ）減算処理、デモザイキング処理、ホワイトバランス（ＷＢ）調整処理、電子ズーム処理、画像強調処理、マスク処理及びオンスクリーンディスプレイ（ＯＳＤ）処理、表示用画像変換処理等を行って取得した画像信号を出力する。画像処理部３１は、画像強調処理を行う画像強調部３１２と、画像強調処理の前段の画像処理を行う第１画像処理部３１１と、画像強調処理の後段の画像処理を行う第２画像処理部３１４とを備える。 The image processing unit 31 performs predetermined image processing on the image signal output from the image sensor of the attached endoscope. The image processing unit 31 performs an optical black (OB) subtraction process, a demosaicing process, a white balance (WB) adjustment process, an electronic zoom process, an image on an image signal (digital) output from the image sensor of the attached endoscope. An image signal obtained by performing enhancement processing, mask processing, on-screen display (OSD) processing, display image conversion processing, and the like is output. The image processing unit 31 includes an image enhancement unit 312 that performs image enhancement processing, a first image processing unit 311 that performs image processing prior to image enhancement processing, and a second image processing unit that performs image processing subsequent to image enhancement processing. 314.
　画像強調部３１２は、プロセッサ３に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行うフィルタ３１３（フィルタ処理部）を備える。フィルタ３１３は、設定された係数に従って、着目画素を中心としたｎ×ｍ画素（ｎ，ｍは正の整数）の画素ブロックに対してフィルタをフィルタ演算（行列演算）することにより、着目画素の処理結果を算出し、着目画素位置を１画素ずつずらしながら全画素について演算を行う。フィルタ３１３は、画像強調用の係数が設定された場合には、画像強調フィルタ処理を行い、ローパスフィルタ（ＬＰＦ：Low　Pass　Filter）処理用の係数が設定された場合には、ＬＰＦ処理（モアレ除去処理）を行う。 The image enhancement unit 312 includes a filter 313 (filter processing unit) that performs a filter operation with different calculation coefficients depending on the type of the endoscope attached to the processor 3. The filter 313 performs filter operation (matrix operation) on the pixel block of n × m pixels (n and m are positive integers) centered on the pixel of interest according to the set coefficient, thereby The processing result is calculated, and the calculation is performed for all pixels while shifting the pixel position of interest one pixel at a time. The filter 313 performs image enhancement filter processing when a coefficient for image enhancement is set, and LPF processing (moire removal) when a coefficient for low-pass filter (LPF) processing is set. Process).
　制御部３２は、ＣＰＵ等を用いて実現される。制御部３２は、プロセッサ３の各構成に対する指示情報やデータの転送等を行うことによって、プロセッサ３の各部位の処理動作を制御する。プロセッサ３に第１内視鏡２Ａが装着されている場合（図１参照）、制御部３２は、各ケーブルを介して第１内視鏡２Ａの撮像素子２３Ａ及びメモリ２４Ａにそれぞれ接続し、撮像素子２３Ａ及びメモリ２４Ａに対する制御も行う。プロセッサ３に第２内視鏡２Ｂが装着されている場合（図２参照）、制御部３２は、各ケーブルを介して第２内視鏡２Ｂの撮像素子２３Ｂ及びメモリ２４Ｂにそれぞれ接続し、撮像素子２３Ｂ及びメモリ２４Ｂに対する制御も行う。制御部３２は、内視鏡識別部３２１及びフィルタ係数設定部３２２を有する。 The control unit 32 is realized using a CPU or the like. The control unit 32 controls the processing operation of each part of the processor 3 by transferring instruction information and data to each component of the processor 3. When the first endoscope 2A is attached to the processor 3 (see FIG. 1), the control unit 32 connects to the imaging element 23A and the memory 24A of the first endoscope 2A via each cable, and performs imaging. It also controls the element 23A and the memory 24A. When the second endoscope 2B is attached to the processor 3 (see FIG. 2), the control unit 32 is connected to the imaging element 23B and the memory 24B of the second endoscope 2B via each cable, and performs imaging. The device 23B and the memory 24B are also controlled. The control unit 32 includes an endoscope identification unit 321 and a filter coefficient setting unit 322.
　内視鏡識別部３２１は、プロセッサ３に装着された内視鏡が、第１内視鏡２Ａと第２内視鏡２Ｂとのいずれであるかを識別する。プロセッサ３は、プロセッサ３に装着された内視鏡との間で通信処理を行うことによって、装着された内視鏡の種別を識別する。内視鏡識別部３２１は、第１内視鏡２Ａのメモリ２４Ａとの間で通信処理を行うことによって、第１内視鏡２Ａの識別情報Ｉａ（図１参照）を取得する。内視鏡識別部３２１は、第２内視鏡２Ｂのメモリ２４Ｂとの間で通信処理を行うことによって、第２内視鏡２Ｂの識別情報Ｉｂ（図２参照）を取得する。内視鏡識別部３２１は、取得した識別情報を基に、プロセッサ３に接続されている内視鏡が第１内視鏡２Ａと第２内視鏡２Ｂとのいずれであるかを識別する。 The endoscope identification unit 321 identifies whether the endoscope mounted on the processor 3 is the first endoscope 2A or the second endoscope 2B. The processor 3 identifies the type of the attached endoscope by performing communication processing with the endoscope attached to the processor 3. The endoscope identification unit 321 acquires identification information Ia (see FIG. 1) of the first endoscope 2A by performing communication processing with the memory 24A of the first endoscope 2A. The endoscope identification unit 321 acquires the identification information Ib (see FIG. 2) of the second endoscope 2B by performing communication processing with the memory 24B of the second endoscope 2B. The endoscope identifying unit 321 identifies whether the endoscope connected to the processor 3 is the first endoscope 2A or the second endoscope 2B based on the acquired identification information.
　フィルタ係数設定部３２２は、内視鏡識別部３２１における識別結果に基づいたフィルタ係数を画像強調部３１２のフィルタ３１３に設定する。フィルタ係数設定部３２２は、装着された内視鏡が第１内視鏡２Ａである場合には、フィルタ３１３が画像信号に対してＬＰＦ処理を施すためのフィルタ係数Ｐａ（図１参照）をフィルタ３１３に設定する。フィルタ係数設定部３２２は、装着された内視鏡が第２内視鏡２Ｂである場合には、フィルタ３１３が画像信号に対して強調処理を施すためのフィルタ係数Ｐｂをフィルタ３１３に設定する。 The filter coefficient setting unit 322 sets a filter coefficient based on the identification result in the endoscope identification unit 321 in the filter 313 of the image enhancement unit 312. When the attached endoscope is the first endoscope 2A, the filter coefficient setting unit 322 filters the filter coefficient Pa (see FIG. 1) for the filter 313 to perform LPF processing on the image signal. Set to 313. When the attached endoscope is the second endoscope 2B, the filter coefficient setting unit 322 sets a filter coefficient Pb for the filter 313 to perform enhancement processing on the image signal in the filter 313.
　記憶部３３は、揮発性メモリや不揮発性メモリを用いて実現され、プロセッサ３を動作させるための各種プログラムを記憶する。記憶部３３は、プロセッサ３の処理中の情報を一時的に記憶する。記憶部３３は、プロセッサ３に接続する内視鏡から出力された画像信号等を記憶する。記憶部３３は、プロセッサ３の外部から装着されるメモリカード等を用いて構成されてもよい。記憶部３３には、フィルタ係数格納部３３１が設けられており、各種別の内視鏡にそれぞれ対応するフィルタ係数を記憶する。フィルタ係数設定部３２２は、フィルタ係数格納部３３１に対し、内視鏡識別部３２１における識別結果に応じて、パラメータ読み出し指示Ｔａ，Ｔｂを実行することによって、フィルタ係数格納部３３１からフィルタ係数Ｐａまたはフィルタ係数Ｐｂを読み出す。フィルタ係数設定部３２２は、読み出したフィルタ係数Ｐａまたはフィルタ係数Ｐｂをフィルタ３１３に設定する。 The storage unit 33 is realized by using a volatile memory or a nonvolatile memory, and stores various programs for operating the processor 3. The storage unit 33 temporarily stores information being processed by the processor 3. The storage unit 33 stores an image signal or the like output from an endoscope connected to the processor 3. The storage unit 33 may be configured using a memory card or the like attached from the outside of the processor 3. The storage unit 33 is provided with a filter coefficient storage unit 331 and stores filter coefficients respectively corresponding to various types of endoscopes. The filter coefficient setting unit 322 executes parameter read instructions Ta and Tb on the filter coefficient storage unit 331 in accordance with the identification result in the endoscope identification unit 321, so that the filter coefficient Pa or the filter coefficient Pa or Read the filter coefficient Pb. The filter coefficient setting unit 322 sets the read filter coefficient Pa or filter coefficient Pb in the filter 313.
　入力部３４は、各種指示情報の入力を受け付けて、受け付けた各種指示情報を制御部３２に入力する。入力部３４は、被検体である患者に関する患者データ（例えばＩＤ、生年月日、名前等）、及び、検査内容等のデータの入力を受け付ける。入力部３４は、プロセッサ３のフロントパネルに設けられたボタンやタッチパネル等の操作デバイスであってもよく、プロセッサ３に接続されたマウス及びキーボード等の操作デバイスを用いて実現されてもよく、接続された内視鏡の把持部に設けられたスイッチ等であってもよい。また、入力部３４は、タブレット型端末装置等の可搬型端末装置からの遠隔操作によって指示情報を入力されるものであってもよい。 The input unit 34 receives input of various instruction information, and inputs the received various instruction information to the control unit 32. The input unit 34 receives input of patient data (for example, ID, date of birth, name, etc.) related to a patient as a subject, and data such as examination contents. The input unit 34 may be an operation device such as a button or a touch panel provided on the front panel of the processor 3, or may be realized using an operation device such as a mouse and a keyboard connected to the processor 3. The switch etc. which were provided in the holding part of the made endoscope may be sufficient. The input unit 34 may be one in which instruction information is input by remote operation from a portable terminal device such as a tablet terminal device.
　表示装置４は、液晶または有機ＥＬを用いた表示ディスプレイ等を用いて構成される。表示装置４は、プロセッサ３から出力された表示用画像を含む各種情報を表示する。 The display device 4 is configured using a display or the like using liquid crystal or organic EL. The display device 4 displays various information including a display image output from the processor 3.
　図３は、プロセッサ３におけるフィルタ係数設定処理の処理手順を示すフローチャートである。 FIG. 3 is a flowchart showing a processing procedure of filter coefficient setting processing in the processor 3.
　図３に示すように、制御部３２は、プロセッサ３に内視鏡が装着されたか否かを判断する（ステップＳ１）。制御部３２は、プロセッサ３に内視鏡が装着されていないと判断した場合（ステップＳ１：Ｎｏ）、ステップＳ１に戻り、ステップＳ１の判断処理を行う。プロセッサ３に内視鏡が装着されたと制御部３２が判断した場合（ステップＳ１：Ｙｅｓ）、内視鏡識別部３２１は、プロセッサ３に装着されている内視鏡が、第１内視鏡２Ａと第２内視鏡２Ｂとのいずれであるかを識別する内視鏡識別処理を行い（ステップＳ２）、識別結果をフィルタ係数設定部３２２に出力する。フィルタ係数設定部３２２は、内視鏡識別部３２１における識別結果に基づいたフィルタ係数をフィルタ３１３に設定するフィルタ係数設定処理を行う（ステップＳ３）。画像強調部３１２のフィルタ３１３は、入力された画像信号に対し、設定されたフィルタ係数に従ってフィルタ演算を実行するフィルタ処理を行う（ステップＳ４）。したがって、ステップＳ４では、フィルタ３１３は、プロセッサ３に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行う。 As shown in FIG. 3, the control unit 32 determines whether or not an endoscope is attached to the processor 3 (step S1). When determining that the endoscope is not attached to the processor 3 (step S1: No), the control unit 32 returns to step S1 and performs the determination process of step S1. When the control unit 32 determines that the endoscope is attached to the processor 3 (step S1: Yes), the endoscope identification unit 321 indicates that the endoscope attached to the processor 3 is the first endoscope 2A. And the second endoscope 2B are subjected to endoscope identification processing (step S2), and the identification result is output to the filter coefficient setting unit 322. The filter coefficient setting unit 322 performs a filter coefficient setting process for setting the filter coefficient based on the identification result in the endoscope identification unit 321 in the filter 313 (step S3). The filter 313 of the image enhancement unit 312 performs a filter process for performing a filter operation on the input image signal in accordance with the set filter coefficient (step S4). Therefore, in step S <b> 4, the filter 313 performs a filter operation using different calculation coefficients depending on the type of the endoscope attached to the processor 3.
　図４は、図３に示すフィルタ係数設定処理の処理手順を示す図である。図４に示すように、フィルタ係数設定部３２２は、内視鏡識別部３２１の識別結果を基に、プロセッサ３に装着されている内視鏡の種別が第１内視鏡２Ａまたは第２内視鏡２Ｂのいずれであるかを判断する（ステップＳ１１）。フィルタ係数設定部３２２は、プロセッサ３に装着されている内視鏡の種別が第１内視鏡２Ａであると判断した場合（ステップＳ１１：第１内視鏡）、フィルタ係数格納部３３１からＬＰＦ処理用のフィルタ係数Ｐａを取得する（ステップＳ１２）。フィルタ係数設定部３２２は、プロセッサ３に装着されている内視鏡の種別が第２内視鏡２Ｂであると判断した場合（ステップＳ１１：第２内視鏡）、フィルタ係数格納部３３１から強調処理用のフィルタ係数Ｐｂを取得する（ステップＳ１３）。フィルタ係数設定部３２２は、取得した係数をフィルタ３１３に設定して（ステップＳ１４）、フィルタ係数設定処理を終了し、図３のメインルーチンへ戻る。 FIG. 4 is a diagram showing a processing procedure of the filter coefficient setting process shown in FIG. As shown in FIG. 4, the filter coefficient setting unit 322 determines whether the type of endoscope attached to the processor 3 is the first endoscope 2A or the second endoscope based on the identification result of the endoscope identification unit 321. It is determined which is the endoscope 2B (step S11). When the filter coefficient setting unit 322 determines that the type of the endoscope attached to the processor 3 is the first endoscope 2A (step S11: first endoscope), the filter coefficient storage unit 331 receives the LPF. A filter coefficient Pa for processing is acquired (step S12). When the filter coefficient setting unit 322 determines that the type of the endoscope attached to the processor 3 is the second endoscope 2B (step S11: second endoscope), the filter coefficient setting unit 322 emphasizes from the filter coefficient storage unit 331. A filter coefficient Pb for processing is acquired (step S13). The filter coefficient setting unit 322 sets the acquired coefficient in the filter 313 (step S14), ends the filter coefficient setting process, and returns to the main routine of FIG.
　以上のように、実施の形態によれば、プロセッサ３に接続されている内視鏡が、ファイバースコープ対応のカメラヘッドを有する第１内視鏡２Ａと、ファイバースコープ非対応の第２内視鏡２Ｂとのいずれであるかに応じて、異なる演算の係数でフィルタ演算を行うフィルタ３１３を備えることによって、モアレ除去処理が必要な場合にのみモアレ除去処理を実行できるプロセッサを実現することができる。言い換えると、本実施の形態では、ファイバースコープ対応のカメラヘッドを有する第１内視鏡２Ａがプロセッサ３に装着された場合には、ＬＰＦ処理用のフィルタ係数Ｐａがフィルタ３１３に設定され、ファイバースコープ非対応の第２内視鏡２Ｂがプロセッサ３に装着された場合には、強調処理用のフィルタ係数Ｐｂがフィルタ３１３に設定される。従って、本実施の形態によれば、ＬＰＦ処理用のフィルタを新たに設けずとも、簡易な構成のままで、フィルタのフィルタ係数のみを切り換えることで、内視鏡の種別に応じてモアレ除去処理と画像強調処理とを排他的に実行できる。 As described above, according to the embodiment, the endoscope connected to the processor 3 includes the first endoscope 2A having a fiberscope-compatible camera head, and the second endoscope not compatible with the fiberscope. By providing the filter 313 that performs the filter operation with different calculation coefficients depending on whether it is 2B or not, a processor that can execute the moire removal processing only when the moire removal processing is necessary can be realized. In other words, in the present embodiment, when the first endoscope 2A having a fiberscope-compatible camera head is attached to the processor 3, the filter coefficient Pa for LPF processing is set in the filter 313, and the fiberscope When the non-corresponding second endoscope 2B is attached to the processor 3, the filter coefficient Pb for enhancement processing is set in the filter 313. Therefore, according to the present embodiment, the moiré removal processing is performed according to the type of the endoscope by switching only the filter coefficient of the filter without changing the filter for LPF processing. And image enhancement processing can be executed exclusively.
（実施の形態の変形例１）
　入力部３４は、ユーザの操作に従って、ＬＰＦ処理の強度を指示する強度指示情報の入力を受け付け可能である。ＬＰＦ処理用のフィルタ係数のうち、ＬＰＦ処理の強度に応じて、ＬＰＦ処理における遮断周波数の閾値（閾値）がそれぞれ決められている。フィルタ係数格納部３３１は、ＬＰＦ処理の強弱に応じて、少なくとも遮断周波数の閾値が異なる複数のＬＰＦ処理用のフィルタ係数を記憶する。例えば、ＬＰＦ処理の強度が強めの場合には、ＬＰＦ処理用のフィルタ係数のうちの遮断周波数の閾値として、ＬＰＦ処理の強度が弱めの場合に使用される遮断周波数の閾値よりも低い値がフィルタ係数格納部３３１に記憶されている。フィルタ係数設定部３２２は、ＬＰＦ処理を施すためのフィルタ係数として、入力部３４から入力された強度指示情報が指示する強度に対応させて、ＬＰＦ処理における遮断周波数の閾値が異なる複数のＬＰＦ係数のいずれか一つをフィルタ３１３に設定する。 (Modification 1 of embodiment)
The input unit 34 can accept input of strength instruction information for instructing the strength of LPF processing in accordance with a user operation. Of the filter coefficients for LPF processing, the threshold value (threshold value) of the cutoff frequency in LPF processing is determined according to the strength of LPF processing. The filter coefficient storage unit 331 stores a plurality of filter coefficients for LPF processing at least having different cutoff frequency thresholds according to the strength of the LPF processing. For example, when the intensity of the LPF process is high, a value lower than the threshold of the cut-off frequency used when the intensity of the LPF process is weak is used as the cut-off frequency threshold of the filter coefficients for the LPF process. It is stored in the coefficient storage unit 331. The filter coefficient setting unit 322 includes a plurality of LPF coefficients having different cutoff frequency threshold values in the LPF process corresponding to the intensity indicated by the intensity instruction information input from the input unit 34 as filter coefficients for performing the LPF process. Either one is set in the filter 313.
　図５は、図３に示すフィルタ係数設定処理の他の処理手順を示す図である。図５に示すステップＳ２１，２５は、図４に示すステップＳ１１，１３である。フィルタ係数設定部３２２は、プロセッサ３に装着されている内視鏡の種別が第１内視鏡２Ａであると判断した場合（ステップＳ２１：第１内視鏡）、入力部３４から入力された強度指示情報に基づいて、ＬＰＦ処理の強度として強めまたは弱めのいずれを指示するかを判断する（ステップＳ２２）。フィルタ係数設定部３２２は、ＬＰＦ処理の強度として強めを指示すると判断した場合には（ステップＳ２２：強め）、ＬＰＦ強め処理用のフィルタ係数をフィルタ係数格納部３３１から取得する（ステップＳ２３）。フィルタ係数設定部３２２は、ＬＰＦ処理の強度として弱めを指示すると判断した場合には（ステップＳ２２：弱め）、ＬＰＦ弱め処理用のフィルタ係数をフィルタ係数格納部３３１から取得する（ステップＳ２４）。図５に示すステップＳ２６は、図４に示すステップＳ１４である。 FIG. 5 is a diagram showing another processing procedure of the filter coefficient setting process shown in FIG. Steps S21 and 25 shown in FIG. 5 are steps S11 and 13 shown in FIG. When the filter coefficient setting unit 322 determines that the type of the endoscope attached to the processor 3 is the first endoscope 2A (step S21: first endoscope), the filter coefficient setting unit 322 is input from the input unit 34. Based on the intensity instruction information, it is determined whether to instruct stronger or weaker as the intensity of the LPF process (step S22). When the filter coefficient setting unit 322 determines to instruct to increase the intensity of the LPF process (step S22: higher), the filter coefficient setting unit 322 acquires the filter coefficient for the LPF enhancement process from the filter coefficient storage unit 331 (step S23). If the filter coefficient setting unit 322 determines to instruct weakening as the intensity of the LPF process (step S22: weak), the filter coefficient setting unit 322 acquires the filter coefficient for the LPF weakening process from the filter coefficient storage unit 331 (step S24). Step S26 shown in FIG. 5 is step S14 shown in FIG.
　この実施の形態の変形例１のように、フィルタ係数設定部３２２が、入力部３４から入力された強度指示情報が指示する強度に対応した遮断周波数の閾値を含むＬＰＦ係数をフィルタ３１３に設定できるようにしてもよい。 As in the first modification of this embodiment, the filter coefficient setting unit 322 can set the LPF coefficient including the cutoff frequency threshold corresponding to the intensity indicated by the intensity instruction information input from the input unit 34 in the filter 313. You may do it.
（実施の形態の変形例２）
　図６は、実施の形態の変形例２にかかる内視鏡システムの概略構成を示す模式図である。 (Modification 2 of embodiment)
FIG. 6 is a schematic diagram illustrating a schematic configuration of the endoscope system according to the second modification of the embodiment.
　図６に示す内視鏡システム１０１において、第１内視鏡１２Ａのカメラヘッド１２１Ａ内のメモリ１２４Ａには、該第１内視鏡１２Ａが撮像した画像信号に対するフィルタ処理時に使用するフィルタ係数１２５Ａが記憶されている。同様に、第２内視鏡１２Ｂの操作部１２１Ｂ内のメモリ１２４Ｂには、該第２内視鏡１２Ｂが撮像した画像信号に対するフィルタ処理時に使用するフィルタ係数１２５Ｂが記憶されている。 In the endoscope system 101 shown in FIG. 6, the filter coefficient 125 </ b> A used in the filter process for the image signal captured by the first endoscope 12 </ b> A is stored in the memory 124 </ b> A in the camera head 121 </ b> A of the first endoscope 12 </ b> A. It is remembered. Similarly, the memory 124B in the operation unit 121B of the second endoscope 12B stores a filter coefficient 125B used at the time of filter processing for the image signal captured by the second endoscope 12B.
　プロセッサ１０３の制御部１３２は、内視鏡接続時に、接続されている内視鏡のメモリ１２４Ａまたはメモリ１２４Ｂとの間で通信処理を行うことによって、メモリ１２４Ａまたはメモリ１２４Ｂから、内視鏡の識別情報とともに、フィルタ係数１２５Ａまたはフィルタ係数１２５Ｂを読み出す。フィルタ係数設定部１３２２は、メモリ１２４Ａまたはメモリ１２４Ｂから制御部１３２が読み出したフィルタ係数をフィルタ３１３に設定する。 The control unit 132 of the processor 103 performs identification processing of the endoscope from the memory 124A or the memory 124B by performing communication processing with the memory 124A or the memory 124B of the connected endoscope when the endoscope is connected. Together with the information, the filter coefficient 125A or the filter coefficient 125B is read out. The filter coefficient setting unit 1322 sets the filter coefficient read by the control unit 132 from the memory 124A or the memory 124B in the filter 313.
　この実施の形態の変形例２の構成によれば、図１に示す内視鏡識別部３２１を削除できるとともに、図３に示すフィルタ係数の設定までの処理手順のうち内視鏡識別処理（ステップＳ２）が不要になる。 According to the configuration of the modification 2 of this embodiment, the endoscope identification unit 321 shown in FIG. 1 can be deleted, and the endoscope identification process (steps) in the processing procedure up to the setting of the filter coefficient shown in FIG. S2) becomes unnecessary.
　なお、第１内視鏡２Ａは、光ファイバーで伝送された光学像を光ファイバー基端部に設けられた撮像素子で撮像するハイブリット型の内視鏡であってもよい。また、第２内視鏡２Ｂは、挿入部が、軟性または硬性の内視鏡であってもよい。或いは、第２内視鏡２Ｂは、光学的内視鏡の接続を想定していないカメラヘッドを有する構成であってもよい。また、プロセッサ３，１０３は、光源が一体となった光源一体型プロセッサである他、プロセッサと光源装置とが別体である構成であってもよい。 The first endoscope 2A may be a hybrid endoscope that captures an optical image transmitted by an optical fiber with an image sensor provided at the optical fiber base end. The second endoscope 2B may be a soft or hard endoscope with an insertion portion. Alternatively, the second endoscope 2B may have a camera head that is not assumed to be connected to an optical endoscope. In addition to the light source integrated processor in which the light sources are integrated, the processors 3 and 103 may be configured such that the processor and the light source device are separate.
　また、本実施の形態にかかるプロセッサ３，１０３で実行される各処理に対する実行プログラムは、インストール可能な形式または実行可能な形式のファイルでＣＤ－ＲＯＭ、フレキシブルディスク、ＣＤ－Ｒ、ＤＶＤ等のコンピュータで読み取り可能な記録媒体に記録して提供するように構成してもよく、インターネット等のネットワークに接続されたコンピュータ上に格納し、ネットワーク経由でダウンロードさせることにより提供するように構成してもよい。 In addition, an execution program for each process executed by the processors 3 and 103 according to the present embodiment is an installable format or executable file, and is a computer such as a CD-ROM, flexible disk, CD-R, or DVD. It may be configured to be provided by being recorded on a recording medium readable by the Internet, or may be configured to be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. .
　１，１０１　内視鏡システム
　２Ａ，１２Ａ　第１内視鏡
　２Ｂ，１２Ｂ　第２内視鏡
　３，１０３　プロセッサ
　４　表示装置
　２１Ａ，１２１Ａ　カメラヘッド
　２１Ｂ，１２１Ｂ　操作部
　２２Ａ　イメージガイドファイバーバンドル
　２２Ｂ　挿入部
　２３Ａ，２３Ｂ　撮像素子
　２４Ａ，２４Ｂ，１２４Ａ，１２４Ｂ　メモリ
　３１　画像処理部
　３２，１３２　制御部
　３３　記憶部
　３４　入力部
　３１１　第１画像処理部
　３１２　画像強調部
　３１３　フィルタ
　３１４　第２画像処理部
　３２１　内視鏡識別部
　３２２，１３２２　フィルタ係数設定部
　３３１　フィルタ係数格納部 DESCRIPTION OF SYMBOLS 1,101 Endoscope system 2A, 12A 1st endoscope 2B, 12B 2nd endoscope 3,103 Processor 4 Display apparatus 21A, 121A Camera head 21B, 121B Operation part 22A Image guide fiber bundle 22B Insertion part 23A, 23B Image sensor 24A, 24B, 124A, 124B Memory 31 Image processing unit 32, 132 Control unit 33 Storage unit 34 Input unit 311 First image processing unit 312 Image enhancement unit 313 Filter 314 Second image processing unit 321 Endoscope identification unit 322 and 1322 filter coefficient setting unit 331 filter coefficient storage unit

Claims (6)

  1. 　少なくとも、内視鏡先端の対物光学系で結像された光学像を後端側へ伝送するイメージガイドファイバーバンドルを備えるとともに該イメージガイドファイバーバンドルにより伝送された前記光学像を撮像して画像信号を生成する撮像素子を有する第１撮像装置と、前記第１撮像装置とは異なる第２撮像装置とが、排他的に着脱自在に構成され、前記画像信号を処理する内視鏡用処理装置であって、
    　当該内視鏡用処理装置に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行うフィルタ処理部を備えたことを特徴とする内視鏡用処理装置。     At least an image guide fiber bundle for transmitting an optical image formed by an objective optical system at the distal end of the endoscope to the rear end side and capturing the optical image transmitted by the image guide fiber bundle to obtain an image signal A first imaging device having an imaging element to be generated and a second imaging device different from the first imaging device are configured to be detachable exclusively, and are an endoscope processing device that processes the image signal. And
    An endoscope processing apparatus, comprising: a filter processing unit that performs a filter operation using different calculation coefficients according to a type of an endoscope attached to the endoscope processing apparatus.
  2. 　前記装着された内視鏡が前記第１撮像装置である場合には前記フィルタ処理部が前記画像信号に対してローパスフィルタ処理を施すためのフィルタ係数を前記演算の係数として前記フィルタ処理部に設定し、前記装着された内視鏡が前記第２撮像装置である場合には前記フィルタ処理部が前記画像信号に対して強調処理を施すためのフィルタ係数を前記演算の係数として前記フィルタ処理部に設定するフィルタ係数設定部をさらに備えたことを特徴とする請求項１に記載の内視鏡用処理装置。 When the attached endoscope is the first imaging device, a filter coefficient for the filter processing unit to perform low-pass filter processing on the image signal is set in the filter processing unit as a coefficient of the calculation. When the attached endoscope is the second imaging device, the filter processing unit uses the filter coefficient for performing enhancement processing on the image signal as the calculation coefficient. The endoscope processing apparatus according to claim 1, further comprising a filter coefficient setting unit for setting.
  3. 　前記フィルタ係数設定部は、前記ローパスフィルタ処理を施すためのフィルタ係数として、前記ローパスフィルタ処理における閾値が異なる複数のローパスフィルタ係数のいずれか一つを前記フィルタ処理部に設定することを特徴とする請求項２に記載の内視鏡用処理装置。 The filter coefficient setting unit sets, as the filter coefficient for performing the low-pass filter process, any one of a plurality of low-pass filter coefficients having different threshold values in the low-pass filter process in the filter processing unit. The endoscope processing apparatus according to claim 2.
  4. 　前記ローパスフィルタ処理の強度を指示する強度指示情報の入力を受け付ける入力部をさらに備え、
    　前記フィルタ係数設定部は、前記ローパスフィルタ処理の閾値が異なる複数のローパスフィルタ係数のうち、前記入力部から入力された強度指示情報が指示する強度に対応したローパスフィルタ係数を前記フィルタ処理部に設定することを特徴とする請求項３に記載の内視鏡用処理装置。     An input unit that receives input of intensity instruction information that indicates the intensity of the low-pass filter processing;
    The filter coefficient setting unit sets, in the filter processing unit, a low-pass filter coefficient corresponding to an intensity indicated by the intensity instruction information input from the input unit among a plurality of low-pass filter coefficients having different thresholds for the low-pass filter processing. The endoscope processing apparatus according to claim 3, wherein:
  5. 　当該内視鏡用処理装置に装着された撮像装置が、前記第１撮像装置と第２撮像装置とのいずれであるかを識別する識別部をさらに備え、
    　前記フィルタ係数設定部は、前記識別部における識別結果に基づいたフィルタ係数を前記フィルタ処理部に設定することを特徴とする請求項２～４のいずれか一つに記載の内視鏡用処理装置。     An identification unit for identifying whether the imaging device mounted on the endoscope processing device is the first imaging device or the second imaging device;
    The endoscope processing apparatus according to any one of claims 2 to 4, wherein the filter coefficient setting unit sets a filter coefficient based on an identification result in the identification unit in the filter processing unit. .
  6. 　少なくとも、内視鏡先端の対物光学系で結像された光学像を後端側へ伝送するイメージガイドファイバーバンドルを備えるとともに該イメージガイドファイバーバンドルにより伝送された前記光学像を撮像して画像信号を生成する撮像素子を有する第１撮像装置と、前記第１撮像装置とは異なる第２撮像装置とが、排他的に着脱自在に構成され、前記画像信号を処理する内視鏡用処理装置が行う演算処理方法であって、
    　前記内視鏡用処理装置に装着された内視鏡の種別に応じて異なる演算の係数でフィルタ演算を行うフィルタ処理を含むことを特徴とする演算処理方法。     At least an image guide fiber bundle for transmitting an optical image formed by an objective optical system at the distal end of the endoscope to the rear end side and capturing the optical image transmitted by the image guide fiber bundle to obtain an image signal A first imaging device having an imaging device to be generated and a second imaging device different from the first imaging device are configured to be detachable exclusively, and an endoscope processing device that processes the image signal performs the processing. An arithmetic processing method,
    A calculation processing method, comprising: a filter process for performing a filter calculation with different calculation coefficients depending on a type of an endoscope attached to the endoscope processing apparatus.
PCT/JP2016/078241 2015-10-08 2016-09-26 Endoscope-use processing device and calculation processing method WO2017061289A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297044A (en) * 1988-02-23 1989-11-30 Olympus Optical Co Ltd Electronic endoscope device
JPH0329636A (en) * 1989-03-22 1991-02-07 Olympus Optical Co Ltd Electronic endoscope apparatus
JP2000350193A (en) * 1999-06-03 2000-12-15 Olympus Optical Co Ltd Image processing unit and endoscope system
JP2001208986A (en) * 2000-01-24 2001-08-03 Olympus Optical Co Ltd Light source device for endoscope
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