WO2012014678A1 - 内視鏡装置および内視鏡装置の制御方法 - Google Patents
内視鏡装置および内視鏡装置の制御方法 Download PDFInfo
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- WO2012014678A1 WO2012014678A1 PCT/JP2011/065982 JP2011065982W WO2012014678A1 WO 2012014678 A1 WO2012014678 A1 WO 2012014678A1 JP 2011065982 W JP2011065982 W JP 2011065982W WO 2012014678 A1 WO2012014678 A1 WO 2012014678A1
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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
- A61B1/00002—Operational features of endoscopes
- A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
- A61B1/00009—Operational features of endoscopes characterised by electronic signal processing of image signals during a use of endoscope
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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
- A61B1/00002—Operational features of endoscopes
- A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
- A61B1/00006—Operational features of endoscopes characterised by electronic signal processing of control signals
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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
- 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
- A61B1/045—Control thereof
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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
- A61B1/06—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 with illuminating arrangements
- A61B1/0661—Endoscope light sources
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/555—Constructional details for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/61—Noise processing, e.g. detecting, correcting, reducing or removing noise the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4"
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
Definitions
- the present invention relates to an endoscope apparatus having a function of adjusting the brightness of an endoscope image and a method for controlling the endoscope apparatus.
- the endoscope apparatus illuminates with illumination light having an automatic light control function and performs brightness adjustment processing of a captured image in order to capture an image of a dark body cavity and obtain an endoscopic image with appropriate brightness.
- the automatic light control function the light amount is adjusted by controlling the diaphragm of the light source device in accordance with the brightness of the endoscope image calculated by the photometry unit that calculates the brightness of the subject.
- the applicant adopts an average photometry method based on the average value of the brightness for the portion corresponding to the periphery of the imaging range, Discloses an electronic endoscope apparatus and the like that can be observed with optimum brightness by performing peak photometry based on the peak value of brightness. Compared with the photometric method based on the average value of the brightness of the entire screen, this photometric method was able to perform more appropriate brightness control when observing the stomach corner where the user's attention area is in the central area. .
- the lumen wall in the peripheral region of the endoscopic image is too bright. For this reason, the user has to perform a bending operation on the tip so that the region of interest becomes the central region of the endoscopic image.
- an endoscope apparatus having an automatic light control function may require a bending operation in order to optimize brightness depending on the subject, and may not be said to have good operability.
- An object of the present invention is to provide an endoscope apparatus with good operability and a control method for an endoscope apparatus with good operability.
- An endoscope apparatus calculates area dividing means for dividing an endoscopic image into a central area and a peripheral area, and a peripheral brightness average value indicating an average brightness value of the peripheral area.
- Brightness average value calculating means having peripheral brightness average value calculating means and central brightness average value calculating means for calculating a central brightness average value indicating an average brightness value of the central area, and the central brightness average value
- a first weighting coefficient calculating means for calculating a first weighting coefficient ⁇ (where 0 ⁇ ⁇ 1) based on a ratio between the average brightness and the surrounding brightness average value
- the first photometric value calculating means for calculating the first photometric value based on the sum of the value obtained by multiplying the weighting coefficient ⁇ by the value obtained by multiplying the average value of the surrounding brightness by (1- ⁇ ). And adjusting the brightness of the endoscopic image based on the first photometric value.
- brightness adjustment control means for generating a brightness adjustment control signal for, including a.
- An endoscopic device control method includes an area dividing step of dividing an endoscopic image into a central area and a peripheral area, and a peripheral brightness average value indicating an average brightness value of the peripheral area A peripheral brightness average value calculating step, a central brightness average value calculating step for calculating a central brightness average value indicating an average brightness value of the central region, the central brightness average value and the peripheral brightness A first weighting factor calculating step of calculating a first weighting factor ⁇ (where 0 ⁇ ⁇ 1) based on the ratio to the average value, and the first weighting factor ⁇ to the central brightness average value.
- a first photometric value calculating step for calculating a first photometric value based on a total value of a value obtained by multiplying the average value of the surrounding brightness and a value obtained by multiplying the average value of the surrounding brightness by (1- ⁇ ); The brightness of the endoscopic image is adjusted based on the photometric value of 1.
- the endoscope system 1 includes a processor 2, endoscopes 6 and 7, a light source device 3, an input unit 4, and a monitor 5.
- the broken line indicates the video signal
- the solid line indicates the flow of the control signal.
- the endoscope 6 is a digital endoscope that has a CCD 6A as imaging means and an A / D conversion circuit (not shown) and outputs a digital video signal.
- the endoscope 7 is an analog endoscope that has a CCD 7A as image pickup means and outputs an analog video signal.
- the CCDs 6A and 7A are one of brightness adjustment units that adjust the brightness of the endoscopic image by changing the speed of the electronic shutters 6B and 7B.
- the endoscope 6 is connected to the processor 2, but may be connected via the light source device 3.
- the endoscope apparatus 8 includes the processor 2 and the light source device 3, the endoscope apparatus 8 may include only the processor 2.
- a circuit system (patient circuit) inserted into a patient's body and a circuit unit (secondary circuit) 34 connected to peripheral devices such as a monitor are insulated to ensure safety.
- the patient circuit 15 of the processor 2 includes two patient circuits 1 (16) and a patient circuit 2 (17), but each patient circuit is formed on a separate wiring board and insulated from each other.
- the patient circuit 1 (16) is connected to the endoscope 6, and the patient circuit 2 (17) is connected to the endoscope 7.
- the patient circuit 2 (17) controls in addition to a circuit for sampling an analog video signal input from the endoscope 7 and converting it to a digital video signal, for example, a CDS (Correlated Double Sampling) unit 18 and an AD unit 19. And a secondary circuit communication unit 20 that communicates signals with the secondary circuit.
- a CDS Correlated Double Sampling
- the video signal is transmitted to the signal processing unit 24 via a serial digital I / F such as an LVDS (low voltage differential signal processing) I / F (22).
- the signal processing unit 24 includes a color separation unit 25, a matrix 1 (26), a detection unit 28, an AGC (auto gain control) unit 30, a ⁇ processing unit 31, a matrix 2 (32), a patient circuit communication unit (27), and a light source.
- a driver 33 and a CPU 29 are included.
- the AGC unit 30 is one of brightness adjustment units that adjust the brightness of the endoscopic image by adjusting the amplification factor (gain).
- the light source device 3 includes, for example, a light source that generates illumination light such as a xenon lamp, a diaphragm unit that adjusts the amount of illumination light, and the like, and a distal end via a light guide of the connected endoscopes 6 and 7. Illuminate the subject from the unit.
- the light source device 3 is one of brightness adjustment units that adjust the brightness of the endoscopic image by adjusting the amount of emitted light by adjusting the current flowing to the light source or adjusting the aperture ratio of the aperture. is there.
- the detection unit 28 has a function of a photometry unit that detects video signals constituting an endoscopic image and processes brightness information and the like.
- the CPU 29 controls the entire endoscope apparatus 8 and has a function of a brightness adjustment control unit that controls the brightness adjustment unit as will be described later.
- the input unit 4 is a keyboard or the like on which a user inputs an instruction to operate the endoscope device 8. Note that a switch or the like of the operation unit of the endoscope may be used as the input unit.
- the monitor 5 is display means for displaying the endoscopic image 5A. In the endoscope system 1, the two endoscopes 6 and 7 can be connected to the endoscope apparatus 8 at the same time, but only one of the endoscopes can be driven.
- the detection unit 28 of the endoscope apparatus 8 includes an area dividing unit 51 that is an area dividing unit, a central brightness average value calculating unit 52 that is a central brightness average value calculating unit, and a surrounding area.
- a brightness average value calculation unit 58 that is a brightness average value calculation unit having a surrounding brightness average value calculation unit 55 that is a brightness average value calculation unit, and a first weighting coefficient that is a first weighting coefficient calculation unit It has the calculation part 53 and the 1st photometry value calculation part 54 which is a 1st photometry value calculation means.
- the brightness adjustment control unit 70 that is brightness adjustment control means is, for example, a part of the function of the CPU 29.
- the area dividing unit 51 captures an endoscopic image captured by the CCD (6A) of the endoscope 6 or the CCD (7A) of the endoscope 7 and includes n central areas and (n ⁇ 1) peripheral areas. It is divided into regions (n is an integer of 3 or more). Then, the ambient brightness average value calculation unit 55 calculates an ambient brightness average value indicating the average brightness value of the surrounding area.
- the central brightness average value calculation unit 52 calculates a central brightness average value indicating the average brightness value of the central region. That is, the brightness average value calculation unit 58 calculates the brightness average value of n regions.
- the first weighting coefficient calculation unit 53 determines the first weighting coefficient ⁇ (where 0 ⁇ ⁇ 1 based on the ratio between the central brightness average value that is the average brightness value of the central region and the peripheral brightness average value). ) Is calculated.
- the brightness adjustment control unit 70 generates a brightness adjustment control signal for adjusting the brightness of the endoscopic image based on the first photometric value.
- each functional unit shown in FIG. 2 need not be an independent component, and may be based on the operation of software. Further, at least a part of the functional units of the detection unit 28 may be performed by the CPU 29 or a sub CPU (not shown).
- One of the average brightness values of the n areas is the average brightness value that is the average brightness value of the central area (area 5).
- the peripheral brightness average value calculation unit 55 is a peripheral brightness average that is an average value of brightness average values of eight peripheral regions (regions 1 to 4 and 6 to 9). Calculate the value.
- the average value calculation process using the luminance values of all the pixels of the endoscopic image 5A uses the luminance values of the thinned pixels at regular intervals in order to reduce the circuit scale and software load. It is preferable to process. Furthermore, pixels brighter than the predetermined threshold and pixels darker than the predetermined threshold may not be used for the processing. The same applies to the following processing.
- the first weighting factor calculation unit 53 determines the first weighting factor ⁇ (where 0 ⁇ , based on the ratio between the central brightness average value and the ambient brightness average value). ⁇ ⁇ 1) is calculated.
- the first weighting coefficient calculation unit 53 calculates the first weighting coefficient ⁇ using, for example, a calculation function.
- the horizontal axis represents the ratio between the central brightness average value and the peripheral brightness average value
- the vertical axis represents the first weighting coefficient ⁇ .
- the calculation function is not a monotonically increasing function.
- the first weighting coefficient ⁇ Are the same value, eg, Wc. Further, when the ratio between the average brightness value and the average brightness value is equal to or less than the predetermined value and equal to or greater than the predetermined value, the first weighting coefficient ⁇ does not change.
- the first weighting coefficient ⁇ has an upper limit value, a lower limit value, and a median value, and the median value Wc has a dead zone. Thereby, the brightness of the endoscope image 5A can be controlled stably.
- the first weighting coefficient calculation unit 53 is not limited to a function (formula), but may be a table or the like made of numerical data, for use in calculating the first weighting coefficient ⁇ .
- Step S14 First photometric value calculation step The sum of a value obtained by multiplying the central brightness average value by the first weighting coefficient ⁇ and a value obtained by multiplying the peripheral brightness average value by (1- ⁇ ). Based on the above, the first photometric value calculation unit 54 calculates the first photometric value.
- the brightness adjustment control unit 70 Based on the first photometric value calculated by the first photometric value calculation unit 54, the brightness adjustment control unit 70 generates a brightness adjustment control signal and transmits it to the brightness adjustment unit. Thus, the brightness adjustment unit is controlled. That is, the brightness adjustment unit adjusts the brightness of the endoscopic image 5A based on the brightness adjustment control signal.
- the brightness adjustment unit is at least one of the AGC unit 30, the diaphragm unit of the light source device 3, or the electronic shutters 6B and 7B of the endoscopes 6 and 7.
- the brightness of the endoscopic image 5A is controlled based on the first photometric value calculated by the processing shown in FIG. For this reason, photometry is performed with emphasis on the higher luminance region (that is, the region that the observer is paying attention to) of the central region and the peripheral region of the endoscopic image 5A, and based on the photometric result. The brightness of the endoscope image 5A is adjusted. For this reason, the endoscope apparatus 8 with good operability can be provided. Similarly, according to the control method of the endoscope apparatus of the present embodiment, it is possible to provide an endoscope apparatus control method with good operability.
- the endoscope apparatus 8A according to the second embodiment of the present invention is similar to the endoscope apparatus 8 according to the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
- the detection unit 28A of the endoscope apparatus 8A includes a second weighting coefficient calculation unit 56 that is a second weighting coefficient calculation unit in addition to or instead of the constituent elements of the detection unit 28.
- a second photometric value calculation unit 57 that is a second photometric value calculation unit
- a third weighting factor calculation unit 59 that is a third weighting factor calculation unit
- a peak photometric value calculation that is a peak photometric value calculation unit A unit 60 and a brightness adjustment control unit 70A.
- the second weighting coefficient calculator 56 calculates the second weighting coefficient ⁇ (where 0 ⁇ ⁇ 1).
- the second photometric value calculator 57 calculates the second photometric value based on the total value of the value obtained by multiplying the first photometric value by the second weighting coefficient ⁇ and the peak photometric value multiplied by (1- ⁇ ). Calculate the value.
- the third weighting coefficient calculator 59 calculates third weighting coefficients ⁇ 1 to ⁇ 9.
- the peak photometric value calculation unit 60 calculates the peak photometric value by multiplying and adding the weighting coefficients ⁇ 1 to ⁇ 9 to the regions 1 to 9 divided by the region dividing unit 51 in the order of brightness. That is, the peak photometric value is a value that does not depend on the brightest region or the position (region) calculated by the pixel value in the endoscope image 5A.
- the second weighting coefficient ⁇ calculated by the second weighting coefficient calculation unit 56 and the third weighting coefficients ⁇ 1 to ⁇ n calculated by the third weighting coefficient calculation unit 59 are the same as the first weighting coefficient ⁇ . It does not change according to conditions, but may be a fixed value set in advance. That is, the second weighting coefficient calculation unit 56 and the third weighting coefficient calculation unit 59 may be storage units that store predetermined weighting coefficients.
- the second photometric value calculator 57 calculates the second photometric value based on the total value of the value obtained by multiplying the first photometric value by the second weighting coefficient ⁇ and the value obtained by multiplying the peak photometric value by (1- ⁇ ). Calculate the photometric value.
- the brightness adjustment control unit 70 ⁇ / b> A generates a brightness adjustment control signal in the same manner as the brightness adjustment control unit 70.
- the above components do not have to be independent components, but may be based on software operations. Further, the operation may be performed by the CPU 29 or the like.
- Steps S20 to S24> Region division step to first photometric value calculation step Since these steps are the same as steps S10 to S14 of the endoscope apparatus 8 of the first embodiment, description thereof will be omitted. However, in the region dividing step S20, the region dividing unit 51A divides the endoscopic image into n regions (n ⁇ 3).
- Peak Photometric Value Calculation Step The peak photometric value is calculated by a peak photometric value calculation subroutine described later.
- the second weighting factor calculation unit 56 calculates by calling the stored third weighting factor ⁇ . However, 0 ⁇ ⁇ 1.
- the peak photometric value calculator 60 is a value obtained by multiplying the first photometric value by the second weighting coefficient ⁇ , and a value obtained by multiplying the peak photometric value by (1- ⁇ ).
- the second photometric value is calculated based on the total value.
- the brightness adjustment control unit 70A generates a brightness adjustment control signal for adjusting the brightness of the endoscopic image 5A based on the second photometric value.
- n 9, but n only needs to be 3 or more. As the number of divisions increases, a more peaky photometric value can be obtained, and light amount adjustment preferable as a peak photometric mode can be performed.
- the third weighting coefficient ⁇ 1 for the brightest average brightness value and the second weighting coefficient ⁇ 9 for the darkest average brightness value are provided.
- the third weighting coefficient ⁇ is set so that the brighter the region, the larger the value.
- Peak Photometric Value Calculation Step The peak photometric value calculator 60 multiplies each of the n brightness average values by the respective third weighting factors ⁇ 1 to ⁇ n corresponding to the order of the magnitudes. A peak photometric value is calculated based on the total value of the multiplied values.
- the maximum brightness average value is the area 5, and the brightness average value of the area 5 is multiplied by ⁇ 1.
- the second highest average brightness value is the area 7, and the average brightness value of the area 7 is multiplied by ⁇ 2.
- the minimum brightness average value is area 2, and the brightness average value of area 2 is multiplied by ⁇ 9.
- the peak photometric value is calculated by summing the nine values obtained by multiplication.
- the endoscope apparatus 8A depends on the first photometric value, which is brightness information depending on the position of the endoscope image 5A, and the position of the endoscope image 5A.
- the brightness is adjusted based on the peak photometric value, which is brightness information that is not used, and the second photometric value calculated based on the peak photometric value.
- the endoscope apparatus 8A of the present embodiment weights and adds the position-independent peak photometric values in addition to the effects of the endoscope apparatus 8, a part of the peripheral portion (for example, the lower right of the screen) Even if there is a difference in brightness in the peripheral area, such as when only the area is bright, it is possible to appropriately adjust the brightness of the attention area by appropriately determining the brightness of the peripheral area, and further improve operability. It is possible to provide an endoscope apparatus having a high height and a method for controlling the endoscope apparatus.
- the endoscope apparatus 8A has good operability. Similarly, according to the control method of the endoscope apparatus of the present embodiment, the operability of the endoscope apparatus is good.
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Abstract
Description
図1に示すように内視鏡システム1は、プロセッサ2と、内視鏡6、7と、光源装置3と、入力部4と、モニタ5と、を有する。図1において破線は映像信号を、実線は制御信号の流れを示している。内視鏡6は、撮像手段であるCCD6Aと、図示しないA/D変換回路を有し、デジタル映像信号を出力するデジタル内視鏡である。一方、内視鏡7は撮像手段であるCCD7Aを有し、アナログ映像信号を出力するアナログ内視鏡である。CCD6A、7Aは電子シャッタ6B、7Bの速度を変化することにより、内視鏡画像の明るさを調整する明るさ調整部のひとつである。
図3に示すように、領域分割部51は、内視鏡画像5Aを1個の中央領域(領域5)と8個の周辺領域(領域1~4、6~9)とにn分割する(nは2以上の整数であり、ここでは、n=9)。領域の分割方法は、図3では、上下左右ともに、3:4:3の比率で分割する例を示しているが、これに限られるものではない。また分割数および分割領域の形状もこれに限られるものではない。なお、本実施形態の内視鏡装置8においては、領域は中央領域と周辺領域とに2つに分割されていればよい。すなわち、n=2であり、領域分割部51は、内視鏡画像を中央領域と周辺領域とに2つに分割するものであればよい。
明るさ平均値算出部58は、n個(n=9)の領域の明るさ平均値を算出する。n個の領域の明るさ平均値の内の1つが、中央領域(領域5)の明るさ平均値である中央明るさ平均値である。
周辺明るさ平均値算出部55は、8個の周辺領域(領域1~4、6~9)の明るさ平均値の平均値である周辺明るさ平均値を算出する。
第1の重み付け係数算出部53は、中央明るさ平均値と周辺明るさ平均値との比率にもとづいて、第1の重み付け係数α(但し、0<α<1)を算出する。
中央明るさ平均値に第1の重み付け係数αを乗じた値と、周辺明るさ平均値に(1―α)を乗じた値と、の合計値にもとづいて、第1の測光値算出部54が第1の測光値を算出する。
第1の測光値算出部54が算出した第1の測光値にもとづいて、明るさ調整制御部70が明るさ調整制御信号を生成し明るさ調整部に送信することにより、明るさ調整部を制御する。すなわち明るさ調整部は明るさ調整制御信号にもとづき内視鏡画像5Aの明るさを調整する。ここで、明るさ調整部とは、AGC部30、光源装置3の絞り部または内視鏡6、7の電子シャッタ6B、7Bの少なくともいずれかである。
本発明の第2実施形態の内視鏡装置8Aは、第1実施の形態の内視鏡装置8に類似しているため、同じ構成要素には同じ符号を付し説明は省略する。
第1実施形態の内視鏡装置8のステップS10~S14と同じであるため、説明は省略する。ただし、領域分割ステップS20において領域分割部51Aは、内視鏡画像をn個の領域(n≧3)に分割する。
後述するピーク測光値算出サブルーチンによりピーク測光値が算出される。
第2の重み付け係数算出部56は記憶していた所定の第3の重み付け係数βを呼び出すことにより算出する。ただし、0<β<1、である。
ピーク測光値算出部60は、第1の測光値に第2の重み付け係数βを乗じた値と、ピーク測光値に(1―β)を乗じた値との合計値、にもとづいて、第2の測光値を算出する。
明るさ調整制御部70Aは、第2の測光値にもとづいて内視鏡画像5Aの明るさを調整するための明るさ調整制御信号を生成する。
ステップS21において算出されているn個の明るさ平均値を、図示しない記憶部等から呼び出す。もちろん、再度、算出してもよい。
第3の重み付け係数算出部59は、n個の明るさ平均値の大きさの順番に対応したn個の第3の重み付け係数γ1~γnを算出する。ただし、0<γ<1、であり、Σγ=(γ1+γ2+・・・+γn)=1、である。図10に示す例では、最も明るい明るさ平均値に対する第3の重み付け係数γ1、最も暗い明るさ平均値に対する第2の重み付け係数γ9、となっている。例えば、第3の重み付け係数βは、明るい領域ほど、値が大きくなるように設定されている。
ピーク測光値算出部60は、n個の明るさ平均値のそれぞれに、大きさの順番に対応した、それぞれの第3の重み付け係数γ1~γnを乗じたn個の乗算値の合計値にもとづいて、ピーク測光値を算出する。
Claims (10)
- 内視鏡画像を中央領域と周辺領域とに分割する領域分割手段と、
前記周辺領域の明るさの平均値を示す周辺明るさ平均値を算出する周辺明るさ平均値算出手段、および前記中央領域の明るさの平均値を示す中央明るさ平均値を算出する中央明るさ平均値算出手段を有する明るさ平均値算出手段と、
前記中央明るさ平均値と前記周辺明るさ平均値との比率にもとづいて第1の重み付け係数α(但し、0<α<1)を算出する第1の重み付け係数算出手段と、
前記中央明るさ平均値に前記第1の重み付け係数αを乗じた値と、前記周辺明るさ平均値に(1―α)を乗じた値と、の合計値にもとづいて、第1の測光値を算出する第1の測光値算出手段と、
前記第1の測光値にもとづいて前記内視鏡画像の明るさを調整するための明るさ調整制御信号を生成する明るさ調整制御手段と、を具備することを特徴とする内視鏡装置。 - 前記重み付け係数算出手段が、前記周辺明るさ平均値と前記明るさ平均値との前記比率が1を中心とする所定範囲の場合、前記比率が変化しても、同じ値の前記第1の重み付け係数αを算出することを特徴とする請求項1に記載の内視鏡装置。
- 前記内視鏡画像の明るさのピーク値にもとづいてピーク測光値を算出するピーク測光値算出手段と、
所定の第2の重み付け係数β(但し、0<β<1)を算出する第2の重み付け係数算出手段と、を更に具備し、
前記明るさ調整制御手段は、前記第1の測光値に前記第2の重み付け係数β(但し、0<β<1)を乗じた値と、前記ピーク測光値に(1―β)を乗じた値と、の合計値にもとづいて前記明るさ調整制御信号を生成することを特徴とする請求項1に記載の内視鏡装置。 - 前記領域分割手段は、前記内視鏡画像をn個の領域(n≧3)に分割するものであり、
前記明るさ平均値算出手段は、前記n個の領域毎の明るさ平均値を算出するものであり、
前記中央明るさ平均値算出手段は、前記n個の明るさ平均値のうち前記中央領域に相当する部分に位置する領域の明るさ平均値にもとづいて前記中央明るさ平均値を算出し、
前記周辺明るさ平均値算出手段は、前記n個の明るさ平均値のうち前記周辺領域に相当する部分に位置する領域の明るさ平均値にもとづいて前記周辺明るさ平均値を算出することを特徴とする請求項1に記載の内視鏡装置。 - 前記n個の明るさ平均値の大きさの順番に対応したn個の所定の第3の重み付け係数γ1~γn(但し、0<γ<1、Σγ=1)を算出する第3の重み付け係数算出手段と、を更に具備し、
前記ピーク測光値算出手段は、それぞれの前記明るさ平均値に、大きさの順番に対応した、それぞれの前記第3の重み付け係数γを乗じた値の合計値、にもとづいて前記ピーク測光値を算出することを特徴とする請求項4に記載の内視鏡装置。 - 内視鏡画像を中央領域と周辺領域とに分割する領域分割ステップと、
前記周辺領域の明るさの平均値を示す周辺明るさ平均値を算出する周辺明るさ平均値算出ステップと、
前記中央領域の明るさの平均値を示す中央明るさ平均値を算出する中央明るさ平均値算出ステップと、
前記中央明るさ平均値と前記周辺明るさ平均値との比率にもとづいて第1の重み付け係数α(但し、0<α<1)を算出する第1の重み付け係数算出ステップと、
前記中央明るさ平均値に前記第1の重み付け係数αを乗じた値と、前記周辺明るさ平均値に(1―α)を乗じた値と、の合計値にもとづいて、第1の測光値を算出する第1の測光値算出ステップと、
前記第1の測光値にもとづいて前記内視鏡画像の明るさを調整するための明るさ調整制御信号を生成する明るさ調整制御ステップと、を具備することを特徴とする内視鏡装置の制御方法。 - 前記重み付け係数算出ステップにおいて、前記周辺明るさ平均値と前記明るさ平均値との前記比率が1を中心とする所定範囲の場合、前記比率が変化しても、同じ値の前記第1の重み付け係数αを算出することを特徴とする請求項6に記載の内視鏡装置の制御方法。
- 前記内視鏡画像の明るさのピーク値にもとづいてピーク測光値を算出するピーク測光値算出ステップを更に具備し、
前記明るさ調整制御ステップにおいて、前記第1の測光値に所定の第2の重み付け係数β(但し、0<β<1)を乗じた値と、前記ピーク測光値に(1―β)を乗じた値と、の合計値にもとづいて前記明るさ調整制御信号を生成することを特徴とする請求項7に記載の内視鏡装置の制御方法。 - 前記領域分割ステップは、前記内視鏡画像をn個の領域に分割するものであり、
前記n個の領域毎の明るさ平均値を算出する明るさ平均値算出ステップを更に備え、
前記中央明るさ平均値算出ステップでは、前記n個の明るさ平均値のうち前記中央領域に相当する部分に位置する領域の明るさ平均値にもとづいて前記中央明るさ平均値を算出し、
前記周辺明るさ平均値算出ステップでは、前記n個の耀朝平均値のうち前記周辺領域に相当する部分に位置する領域の明るさ平均値にもとづいて前記周辺明るさ平均値を算出することを特徴とする請求項8に記載の内視鏡装置の制御方法。 - 前記n個の明るさ平均値の大きさの順番に対応したn個の所定の第3の重み付け係数γ1~γn(但し、0<γ<1、Σγ=1)を算出する第3の重み付け係数算出ステップと、を更に具備し、
前記ピーク測光値算出ステップにおいて、それぞれの前記明るさ平均値に、大きさの順番に対応した、それぞれの前記第3の重み付け係数γを乗じた値の合計値、にもとづいて前記ピーク測光値を算出することを特徴とする請求項9に記載の内視鏡装置の制御方法。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11375884B2 (en) * | 2011-09-27 | 2022-07-05 | California Institute Of Technology | Multi-angle rear-viewing endoscope and method of operation thereof |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3190785A4 (en) * | 2014-09-05 | 2018-03-28 | Olympus Corporation | Imaging device and processing device |
CN104394326A (zh) * | 2014-11-10 | 2015-03-04 | 广东欧珀移动通信有限公司 | 一种测光方法及终端 |
WO2016080351A1 (ja) * | 2014-11-21 | 2016-05-26 | オリンパス株式会社 | 撮像装置、画像処理装置、撮像装置の作動方法 |
CN106455948B (zh) * | 2014-12-15 | 2018-06-12 | 奥林巴斯株式会社 | 摄像*** |
CN111343387B (zh) * | 2019-03-06 | 2022-01-21 | 杭州海康慧影科技有限公司 | 一种摄像设备的自动曝光方法及装置 |
CN110013210A (zh) * | 2019-03-26 | 2019-07-16 | 合肥工业大学 | 无线内窥镜***冷光源亮度的自适应调节方法及装置 |
CN110384470B (zh) * | 2019-07-22 | 2021-09-28 | 深圳开立生物医疗科技股份有限公司 | 一种内窥镜光源的调光方法、装置、光源组件和内窥镜 |
CN110830731A (zh) * | 2019-11-13 | 2020-02-21 | 盛斌 | 内窥镜摄像头及其自适应动态成像方法 |
JP7411527B2 (ja) | 2020-09-25 | 2024-01-11 | Hoya株式会社 | 内視鏡、プログラム及び情報処理方法 |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01120180A (ja) * | 1987-11-04 | 1989-05-12 | Canon Inc | 自動露光制御装置 |
JPH05137060A (ja) * | 1991-11-11 | 1993-06-01 | Matsushita Electric Ind Co Ltd | 自動露光制御装置 |
JPH0946581A (ja) * | 1995-08-02 | 1997-02-14 | Matsushita Electric Ind Co Ltd | 自動露光制御装置 |
JPH09262206A (ja) * | 1996-03-28 | 1997-10-07 | Asahi Optical Co Ltd | 電子内視鏡の照明制御装置 |
JP2001154232A (ja) | 1999-11-24 | 2001-06-08 | Olympus Optical Co Ltd | 測光装置 |
JP2002014291A (ja) * | 2000-06-29 | 2002-01-18 | Fuji Photo Optical Co Ltd | 電子内視鏡装置 |
JP2002300468A (ja) * | 2001-03-30 | 2002-10-11 | Canon Inc | 撮像装置及びその制御方法 |
JP2003046858A (ja) * | 2001-08-02 | 2003-02-14 | Canon Inc | 撮像装置およびその露出制御方法およびその動作処理プログラム |
JP2004267290A (ja) | 2003-03-05 | 2004-09-30 | Olympus Corp | 電子内視鏡装置 |
JP2005021423A (ja) * | 2003-07-03 | 2005-01-27 | Pentax Corp | 分割測光可能な電子内視鏡装置 |
JP2006034796A (ja) * | 2004-07-29 | 2006-02-09 | Pentax Corp | 電子内視鏡装置 |
JP2010167203A (ja) | 2009-01-26 | 2010-08-05 | Yoshifuji Kk | 運動用手袋 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5272538A (en) | 1987-11-04 | 1993-12-21 | Canon Kabushiki Kaisha | Exposure control device |
US5209220A (en) * | 1989-10-05 | 1993-05-11 | Olympus Optical Co., Ltd. | Endoscope image data compressing apparatus |
DE10130876B4 (de) * | 2000-06-29 | 2007-11-08 | Fujinon Corp. | Elektronische Endoskopvorrichtung |
JP4390440B2 (ja) * | 2002-10-31 | 2009-12-24 | Hoya株式会社 | 内視鏡用自動調光装置および電子内視鏡装置 |
JP4284448B2 (ja) * | 2005-01-28 | 2009-06-24 | 富士フイルム株式会社 | 画像処理装置及び方法 |
EP1862967A4 (en) * | 2005-03-22 | 2017-04-26 | Olympus Corporation | Image processing device and endoscope |
JP5173120B2 (ja) * | 2005-05-23 | 2013-03-27 | オリンパスメディカルシステムズ株式会社 | 内視鏡装置 |
JP2007243852A (ja) * | 2006-03-13 | 2007-09-20 | Fujifilm Corp | 色調整用のカラーチャートおよび色調整方法 |
JP5197414B2 (ja) * | 2009-02-02 | 2013-05-15 | オリンパス株式会社 | 画像処理装置及び画像処理方法 |
-
2011
- 2011-07-13 JP JP2012526414A patent/JP5132841B2/ja active Active
- 2011-07-13 CN CN201180029744.0A patent/CN102970916B/zh active Active
- 2011-07-13 EP EP11812270.4A patent/EP2599434B1/en not_active Not-in-force
- 2011-07-13 WO PCT/JP2011/065982 patent/WO2012014678A1/ja active Application Filing
-
2012
- 2012-08-24 US US13/594,031 patent/US8477182B2/en active Active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01120180A (ja) * | 1987-11-04 | 1989-05-12 | Canon Inc | 自動露光制御装置 |
JPH05137060A (ja) * | 1991-11-11 | 1993-06-01 | Matsushita Electric Ind Co Ltd | 自動露光制御装置 |
JPH0946581A (ja) * | 1995-08-02 | 1997-02-14 | Matsushita Electric Ind Co Ltd | 自動露光制御装置 |
JPH09262206A (ja) * | 1996-03-28 | 1997-10-07 | Asahi Optical Co Ltd | 電子内視鏡の照明制御装置 |
JP2001154232A (ja) | 1999-11-24 | 2001-06-08 | Olympus Optical Co Ltd | 測光装置 |
JP2002014291A (ja) * | 2000-06-29 | 2002-01-18 | Fuji Photo Optical Co Ltd | 電子内視鏡装置 |
JP2002300468A (ja) * | 2001-03-30 | 2002-10-11 | Canon Inc | 撮像装置及びその制御方法 |
JP2003046858A (ja) * | 2001-08-02 | 2003-02-14 | Canon Inc | 撮像装置およびその露出制御方法およびその動作処理プログラム |
JP2004267290A (ja) | 2003-03-05 | 2004-09-30 | Olympus Corp | 電子内視鏡装置 |
JP2005021423A (ja) * | 2003-07-03 | 2005-01-27 | Pentax Corp | 分割測光可能な電子内視鏡装置 |
JP2006034796A (ja) * | 2004-07-29 | 2006-02-09 | Pentax Corp | 電子内視鏡装置 |
JP2010167203A (ja) | 2009-01-26 | 2010-08-05 | Yoshifuji Kk | 運動用手袋 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2599434A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11375884B2 (en) * | 2011-09-27 | 2022-07-05 | California Institute Of Technology | Multi-angle rear-viewing endoscope and method of operation thereof |
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