CN102846301B - Intelligent adjusting device of endoscope illumination - Google Patents

Abstract

The invention discloses an intelligent adjusting device of endoscope illumination. The device comprises a medical endoscope, an image acquisition card, a signal processor, a controller, a switching power supply module and a cold light source. Light emitted by the cold light source is sent to the medical endoscope which converts light signals into image signals and transmits the image signals to the signal processor through an image output interface and the image acquisition card; the signal processor receives and processes the image signals transmitted by the image acquisition card, performs color cast correction and image brightness correction on images acquired in real time by establishing classic color images and a color characteristic data bank of the color images, and transmits illumination output control instructions of the cold light source to the controller; and the controller changes switching control signal output phases according to the control instructions of the signal processor to enable direct voltage output by the switching power supply module to change correspondingly, so that the working voltage of the cold light source is changed, and the illumination output by the cold light source is optimized.

Description

The intelligent regulating device of endoscope's illumination

Technical field

What the present invention relates to is the device in a kind of medical apparatus and instruments automatic control technology field, the specifically intelligent regulating device of a kind of endoscope illumination.

Background technology

In recent years, medical endoscope system is used widely in clinical medicine.Medical endoscope is a kind of miniature video camera system that photographic head can be put into human body, providing for oneself under light source irradiation, by optical system by observed target imaging on the target surface of imageing sensor, change the signal of telecommunication into by optical signal, through amplifying, image process after on display the enlarged image of clear display.Under the assistance of endoscopic system, doctor can find the pathological changes that in human body, soft or hard tissue occurs better, and can allow patient understand intuitively, all sidedly the variety of issue existing in own health.These images can also be stored in patient's data base by corresponding communication interface, jointly form electronic health record of new generation with information such as word, figure, X ray pictures, can have access to easily and for the consultation of doctors, the occasions such as academic report, are important feature of new medical model.

Although endoscope has demonstrated its important medical significance and effect clinically day by day as the medical apparatus and instruments of people's intracorporeal organ diagnosis and treatment,, the manufacturing process different according to endoscope, its technical performance but exists great difference.Wherein, provide suitable brightness by cold light source by light guide bundles to reach diagnosis and the effect for the treatment of is doctor's technology boundary of pursuing of doing one's utmost while carrying out clinical observation, but, be also the technical barrier that current endoscope matched process technology not yet really solves.This is because people's intracorporeal organ physiological condition is very complicated, changeable, as: just may there are hydrops, long-pending, pressure fluctuation, internal organs wriggling etc. in patient, cause observed focus in very complicated kinestate, observed position often phase endoscope adopt picture point in unsteady phenomena, once cold light source luminance shortage, focus may be smudgy at a distance, otherwise, phenomenons such as easily causing again by force floodlight reflection and diffraction is crossed in brightness, can affect equally the definition of image.Under the physiological environment condition of interior organ complexity, obtain good observing effect, the intelligent automatic regulation technology of cold light source output illumination degree becomes one to the key technology of closing endoscope's clinical diagnosis accuracy.

Current comparatively popular method is the appropriateness compensation that is embodied as image sharpness by the built-in automatic gain of CCD, but, these class methods do not have dimming function, add that CCD automatic gain control scope is little, gain adjustment module has been integrated in the built-in DSP module of CCD, cannot modify or secondary development, the environment and condition that this has just limited clinical use dramatically, also necessarily requires patient's height to coordinate.Obviously the cold light source output illumination degree that, the endoscope of current use is equipped with does not possess intelligent regulatory function and has seriously restricted the clinical result of use of endoscope.The present invention not only can improve existing endoscopic technique level to the utmost, and can effectively realize the intellectuality adjusting of endoscope's illumination.

Find by prior art documents, patent " micro endoscopy for oral cavity " (application number: 200810052271.6, not yet authorize) introduce " a kind of micro endoscopy for oral cavity; have power supply; micro-imaging unit and lighting unit; and the corresponding imageing sensor that is arranged on the end of micro-imaging unit, the control unit and the monitor that are connected with the outfan of imageing sensor respectively, power supply is connection layout image-position sensor and lighting unit respectively.There is first group of image-forming objective lens of reception target to be observed micro-imaging unit and is connected with the input of imageing sensor, received image is delivered to second group of image-forming objective lens of imageing sensor, be arranged on the transfer between first group of image-forming objective lens and second group of image-forming objective lens.Lighting unit has the fibre-optical cold light source being connected with power supply, the coupled lens being connected with fibre-optical cold light source, and one end is connected with coupled lens, the other end is for the illumination fiber optic bundle of the target to be observed of throwing light on.The present invention can arbitrarily observe any details of tooth, also can carry out the Continuous Observation of different size details, has heating low, and continuous operation regulates colour temperature, changes optical fiber and goes out the features such as illuminance." still, " change optical fiber and go out illuminance " described in this patent is by manual observation micro-image effect, then changes " optical fiber goes out illuminance " by manual adjustment " colour temperature filter "." control unit " described in patented technology description is also only used for processing " while adopting reflecting mirror, because through odd number secondary reflection, there is mirror image problem ".Therefore there is larger technical deficiency in the adjusting of " optical fiber goes out illuminance " in this technology.

Find by prior art documents again, " design and the realization of oral cavity microcavity imaging system " of Liu Tao (2008, University Of Tianjin's Master of engineering academic dissertation) " observe the oral cavity microcavity imaging system of minor detail in oral cavity for the actual needs design of odontologist's clinical diagnosis, carry out the development of stomatology endoscope instrument, mainly comprise the formulation of the General layout Plan of stomatology endoscope instrument, oral cavity microcavity imaging optical system design, Instrument Illumination system design, the parts such as the experiment test of the Machine Design of product and model machine product ", wherein, the design of illuminator has been provided to comparatively detailed scheme, and the illumination of oral endoscope system provides the system of selection of light source and optical fiber.But this paper does not relate to the optical fiber illumination regulation technology problem of endoscopic system all the time.

Summary of the invention

The object of the invention is to, for above-mentioned deficiency of the prior art, provides the intelligent regulating device of a kind of endoscope illumination, can the image information receiving be carried out intelligent decision and optimized by signal processor the output intensity of cold light source illumination.

The present invention is achieved by the following technical solutions, the present invention includes: medical endoscope, image pick-up card, signal processor, controller, switch power module, cold light source.The image output interface of medical endoscope is connected with the input interface of image pick-up card, the output interface of image pick-up card is connected with the input interface of signal processor, the output interface of signal processor is connected with the input interface of controller, the output interface of controller is connected with the control signal input interface of switch power module, the power input interface of switch power module is connected with unidirectional current output interface, and the output interface of switch power module is connected with the input interface of cold light source.The illuminance that cold light source sends is injected medical endoscope, and optical signal is transformed into picture signal by medical endoscope, and sends picture signal to signal processor through image pick-up card by its image output interface; Signal processor receives the picture signal of image pick-up card transmission and processes, by setting up classical color image and color characterization data storehouse thereof, the image of Real-time Collection is carried out to colour cast correction, brightness of image correction, and send cold light source illumination output control instruction to controller; Controller is according to the signal processor control instruction receiving, change switch controlling signal output phase, make the DC voltage of switch power module output produce corresponding variation, and then changed the running voltage of cold light source, therefore cold light source output illumination obtains to optimize and regulates.

Described medical endoscope, forms electromechanical integration parts by cephalic par, bending section, main flexible tube, operating portion, miniature CCD, image output interface, leaded light plug.Cephalic par, comprising: miniature convex lens object lens, image transmission optical fibre top, Optic transmission fiber end; Miniature convex lens object lens are arranged at the front end of cephalic par, for receiving the reflected light from body surface; Bending section is the stage casing mechanical connecting element of cephalic par and main flexible tube, and the rear end of cephalic par is connected with the front end of bending section, and the rear end of bending section is connected with the front end of main flexible tube, and the image transmission optical fibre rear end in main flexible tube is connected with the input port of miniature CCD; Miniature CCD is miniature charge-coupled image sensor, when making at its input interface by miniature convex lens eyepiece and CCD integrated chip, be solidified togather; The output port of miniature CCD is connected with image output interface; Main flexible tube is except parcel image transmission optical fibre and Optic transmission fiber, also comprising one regulates endoscope head end to spy on the fine steel wire of angle, the front end of fine steel wire and the front end robot of cephalic par are fastening, the rear end of fine steel wire is connected with the adjusting knob of operating portion, along with the rotation of operating portion adjusting knob can change the length size of fine steel wire in main flexible tube, and then the curvature of change bending section, therefore can reach cephalic par and spy on the variation of angle; Optic transmission fiber rear end in main flexible tube is connected with leaded light plug optical output port.The light sending from cold light source, sends cold light source light beam into Optic transmission fiber by leaded light plug light input end mouth, through Optic transmission fiber by cold light source beam Propagation to cephalic par throw light on observed object or visual field.For making whole visual field uniform-illumination, Optic transmission fiber illumination zone should be greater than the angle of visual field, therefore not only requires the diameter of Optic transmission fiber as far as possible little, and flexibility is good, and requires there is higher numerical aperture, just can reach the requirement that improves illuminance of viewing field.The reflected light of observed object is after cephalic par obtains miniature convex lens object lens and converges, image on the end face of image transmission optical fibre, spread out of through image transmission optical fibre, again after miniature convex lens eyepiece amplifies, project on the target surface of CCD and pass through opto-electronic conversion, optical signal is transformed into the image pixel sequence signal of telecommunication, by image output interface, picture signal is transferred to signal processor through image pick-up card.

Described signal processor, comprising: input interface, signal processing module, DBM, output interface.Input interface input port receives the data image signal from image pick-up card output, and input interface output port is connected with the input port of signal processing module; The output port of signal processing module is connected with the input port of output interface; DBM carries out data interaction as the memory modules of signal processor by data/address bus and signal processing module; The output port of output interface is connected with the input interface of controller.

Described DBM, its structure is made up of district, the inner classical color image of each district's storage human organ and color characterization data thereof, as: esophagus district storage oesophagoscope classical color image and color characterization data thereof, gastric area storage coat of the stomach endoscope classical color image and color characterization data thereof, colon district storage node intestinal wall endoscope classical color image and color characterization data thereof etc.Described color character, comprising: three primary colours R(is red in RGB color space), G(is green), B(indigo plant) pixel value R ₀(u, v), G ₀(u, v), B ₀(u, v) and matching ratio coefficient thereof, average

and three maximal and minmal value between average.

R ₀(u, v), G ₀(u, v), B ₀(u, v) the classical image pixel value that is otherwise known as, its average is

$\left\{\begin{array}{c}{\stackrel{\‾}{R}}_0(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{R}_0(u,v)\\ {\stackrel{\‾}{G}}_0(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{G}_0(u,v)\\ {\stackrel{\‾}{B}}_0(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{B}_0(u,v)\end{array}\right.$ (formula one)

And comprehensive mean J ₀for

$J_0=\frac{1}{r+g+b}[r{\stackrel{\‾}{R}}_0(u,v)+g{\stackrel{\‾}{G}}_0(u,v)+b{\stackrel{\‾}{B}}_0(u,v)]$ (formula two)

Wherein, m, n are respectively the row, column number of image coordinate; R, g, b are respectively the matching ratio coefficient of three primary colours R, G, B.

Maximal and minmal value between three averages is

$\left\{\begin{array}{c}{I}_{0\max }(u,v)=\max [{\stackrel{\‾}{R}}_0(u,v),{\stackrel{\‾}{G}}_0(u,v),{\stackrel{\‾}{B}}_0(u,v)]\\ I_{0\min }(u,v)=\min [{\stackrel{\‾}{R}}_0(u,v),{\stackrel{\‾}{G}}_0(u,v),{\stackrel{\‾}{B}}_0(u,v)]\end{array}\right.$ (formula three)

Wherein, the pixel coordinate that (u, v) is image that endoscope collects, u, v be row and the row-coordinate value of presentation video respectively.

I _0max(u, v), I _0min(u, v) is hereinafter referred to as again maximum, the minimum brightness output of classic map picture.

Described signal processing module is processed the picture signal receiving, first obtain respectively the R of RGB real-time color image, G, B three primary colours pixel value and average thereof, then the image of Real-time Collection is carried out to colour cast correction, choose again the maximal and minmal value in the three primary colours pixel value after colour cast is proofreaied and correct, carry out brightness of image correction, then ask for image pixel average and comprehensive mean thereof after brightness of image is proofreaied and correct, by the size of classical image pixel comprehensive mean in the image pixel comprehensive mean after movement images gamma correction and data base, regulate the most at last the control instruction of cold light source illumination to export to controller.

Compared with prior art, the present invention has following beneficial effect:

1. make endoscope's clinical manipulation very easy, clinician can find absorbedly and observe focus, needn't be for regulating illumination to take great energy, require great effort; 2. no matter how bending endoscope is, and its illumination can realize intelligence and regulates and reach effect of optimization.Therefore, the present invention can save time to save trouble, improve a new technique of medical diagnosis effect and efficiency.

Accompanying drawing explanation

Fig. 1 is system structure schematic diagram of the present invention;

Fig. 2 is the structured flowchart of signal processor in the present invention.

The specific embodiment

Below in conjunction with accompanying drawing, embodiments of the invention are elaborated: the present embodiment is implemented under take technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.

As shown in Figure 1, the present embodiment comprises: medical endoscope 1, image pick-up card 2, signal processor 3, controller 4, switch power module 5, cold light source 6.The image output interface of medical endoscope 1 is connected with the input interface of image pick-up card 2, the output interface of image pick-up card 2 is connected with the input interface of signal processor 3, the output interface of signal processor 3 is connected with the input interface of controller 4, the output interface of controller 4 is connected with the control signal input interface of switch power module 5, the power input interface of switch power module 5 is connected with 12V unidirectional current output interface, and the output interface of switch power module 5 is connected with the input interface of cold light source 6.The light sending from cold light source 6, sends cold light source 6 light beams into Optic transmission fiber by leaded light plug light input end mouth, through Optic transmission fiber by cold light source 6 beam Propagation to cephalic par throw light on observed object or visual field.

Described medical endoscope, adopt specifications and models be 0 °/φ, 4 × 170(mm) endoscope, the object lens plane of cephalic par is parallel with bending section section, the angle of cut is 0 ° in other words, external diameter is 4mm, and hose length (being the overall length of bending section and main flexible tube) is 170mm.The reflected light of observed body is after cephalic par obtains miniature convex lens object lens and converges, image on the end face of image transmission optical fibre, spread out of through image transmission optical fibre, again after miniature convex lens eyepiece amplifies, project on the target surface of CCD and pass through opto-electronic conversion, optical signal is transformed into the image pixel sequence signal of telecommunication, by image output interface, picture signal is transferred to signal processor 3 through image pick-up card 2.

As shown in Figure 2, described signal processor 3, comprising: input interface 31, signal processing module 32, DBM 33, output interface 34.Input interface 31 input ports receive the data image signal of exporting from image pick-up card 2, and input interface 31 output ports are connected with the input port of signal processing module 32; The output port of signal processing module 32 is connected with the input port of output interface 34; DBM 33 carries out data interaction as the memory modules of signal processor 3 by data/address bus and signal processing module 32; The output port of output interface 34 is connected with the input interface of controller 4.

Described DBM 33, its structure is made up of district, the inner classical color image of each district's storage human organ and color characterization data thereof.Described classic map picture, the inner coloured image of all good human organs of the color being obtained by endoscopic images sensor and definition, be referred to as the inner classical color image of human organ, be called for short classic map picture, as: esophagus district storage oesophagoscope classical color image and color characterization data thereof, gastric area storage coat of the stomach endoscope classical color image and color characterization data thereof, colon district storage node intestinal wall endoscope classical color image and color characterization data thereof etc.Described color character, comprising: three primary colours R(is red in RGB color space), G(is green), B(indigo plant) pixel value R ₀(u, v), G ₀(u, v), B ₀(u, v) and matching ratio coefficient thereof, average and three maximal and minmal value between average.

R ₀(u, v), G ₀(u, v), B ₀(u, v) the classical image pixel value that is otherwise known as, its average is

$\left\{\begin{array}{c}{\stackrel{\‾}{R}}_0(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{R}_0(u,v)\\ {\stackrel{\‾}{G}}_0(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{G}_0(u,v)\\ {\stackrel{\‾}{B}}_0(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{B}_0(u,v)\end{array}\right.$

And comprehensive mean J ₀for

$J_0=\frac{1}{r+g+b}[r{\stackrel{\‾}{R}}_0(u,v)+g{\stackrel{\‾}{G}}_0(u,v)+b{\stackrel{\‾}{B}}_0(u,v)]$

Wherein, m, n are respectively the row, column number of image coordinate; R, g, b are respectively the matching ratio coefficient of three primary colours R, G, B.

Maximal and minmal value between three averages is

$\left\{\begin{array}{c}{I}_{0\max }(u,v)=\max [{\stackrel{\‾}{R}}_0(u,v),{\stackrel{\‾}{G}}_0(u,v),{\stackrel{\‾}{B}}_0(u,v)]\\ I_{0\min }(u,v)=\min [{\stackrel{\‾}{R}}_0(u,v),{\stackrel{\‾}{G}}_0(u,v),{\stackrel{\‾}{B}}_0(u,v)]\end{array}\right.$

Wherein, the pixel coordinate that (u, v) is image that endoscope collects, u, v be row and the row-coordinate value of presentation video respectively.

I _0max(u, v), I _0min(u, v) is hereinafter referred to as again maximum, the minimum brightness output of classic map picture.

Described signal processing module 32 is processed the picture signal receiving, first obtain respectively the R of RGB real-time color image, G, B three primary colours pixel value and average thereof, then the image of Real-time Collection is carried out to colour cast correction, choose again the maximal and minmal value in the three primary colours pixel value after colour cast is proofreaied and correct, carry out brightness of image correction, then ask for image pixel average and comprehensive mean thereof after brightness of image is proofreaied and correct, by the size of classical image pixel comprehensive mean in the image pixel comprehensive mean after movement images gamma correction and data base, the final cold light source illumination that regulates is exported.Concrete detailed implementation procedure is as follows:

(1), according to the real-time color image of endoscopic images sensor output, obtain respectively R, G, the B three primary colours pixel value R of RGB coloured image ₁(u, v), G ₁(u, v), B ₁(u, v), and ask for whole image three primary colours pixel average

?

$\left\{\begin{array}{c}{\stackrel{\‾}{R}}_1(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{R}_1(u,v)\\ {\stackrel{\‾}{G}}_1(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{G}_1(u,v)\\ {\stackrel{\‾}{B}}_1(u,v)=\frac{1}{m\×n}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{n}{\mathrm{\Σ}}}{B}_1(u,v)\end{array}\right.$

R ₁(u, v), G ₁(u, v), B ₁(u, v) the real time imaging three primary colours pixel value that is otherwise known as.

(2), the image of Real-time Collection is carried out to colour cast correction,

$\left\{\begin{array}{c}{R}_2(u,v)=\frac{R_0(u,v)}{{\stackrel{\‾}{R}}_1(u,v)}{R}_1(u,v)\\ G_2(u,v)=\frac{G_0(u,v)}{{\stackrel{\‾}{G}}_1(u,v)}{G}_1(u,v)\\ B_2(u,v)=\frac{B_0(u,v)}{{\stackrel{\‾}{B}}_1(u,v)}{B}_1(u,v)\end{array}\right.$

R ₂(u, v), G ₂(u, v), B ₂(u, v) is called as the three primary colours pixel value after colour cast is proofreaied and correct.

(3), choose the maximal and minmal value in the three primary colours pixel average after colour cast is proofreaied and correct,

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="2"\; label="I"\; filenames="HDA0000141028170000011.png"\; state="\{\{state\}\}">I</figure-callout>}}_{2\max }(u,v)=\max [{\stackrel{\&OverBar;}{R}}_2(u,v),{\stackrel{\&OverBar;}{G}}_2(u,v),{\stackrel{\&OverBar;}{B}}_2(u,v)]\\ I_{2\min }(u,v)=\min [{\stackrel{\&OverBar;}{R}}_2(u,v),{\stackrel{\&OverBar;}{G}}_2(u,v),{\stackrel{\&OverBar;}{B}}_2(u,v)]\end{array}\right.$

Wherein, the three primary colours pixel average after colour cast correction is

$\left\{\begin{array}{c}{\stackrel{\&OverBar;}{R}}_2(u,v)=\frac{1}{m\&times;n}\underset{v=1}{\overset{m}{\mathrm{\&Sigma;}}}\underset{u=1}{\overset{n}{\mathrm{\&Sigma;}}}{R}_2(u,v)\\ {\stackrel{\&OverBar;}{G}}_2(u,v)=\frac{1}{m\&times;n}\underset{v=1}{\overset{m}{\mathrm{\&Sigma;}}}\underset{u=1}{\overset{n}{\mathrm{\&Sigma;}}}{G}_2(u,v)\\ {\stackrel{\&OverBar;}{B}}_2(u,v)=\frac{1}{m\&times;n}\underset{v=1}{\overset{m}{\mathrm{\&Sigma;}}}\underset{u=1}{\overset{n}{\mathrm{\&Sigma;}}}{B}_2(u,v)\end{array}\right.$

I _2max(u, v), I _2min(u, v) is hereinafter referred to as again colour cast and proofreaies and correct the maximum of rear image, minimum brightness output.

(4), brightness of image proofread and correct,

$\left\{\begin{array}{c}\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{R}(u,v)=\sqrt{\frac{I_{0\max }^2-I_{0\min }^2}{({\mathrm{<figure-callout\; id="2"\; label="I"\; filenames="HDA0000141028170000011.png"\; state="\{\{state\}\}">I</figure-callout>}}_{2\max }-I_{2\min })I_{2\max }}}{R}_2(u,v)\\ \stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{G}(u,v)=\sqrt{\frac{I_{0\max }^2-I_{0\min }^2}{(I_{2\max }-I_{2\min })I_{2\max }}}{G}_2(u,v)\\ \stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{B}(u,v)=\sqrt{\frac{I_{0\max }^2-I_{0\min }^2}{({\mathrm{<figure-callout\; id="2"\; label="I"\; filenames="HDA0000141028170000011.png"\; state="\{\{state\}\}">I</figure-callout>}}_{2\max }-I_{2\min })I_{2\max }}}{B}_2(u,v)\end{array}\right.$

be hereinafter referred to as the image pixel value after gamma correction.

(5), ask for the image pixel average after brightness of image is proofreaied and correct ?

$\left\{\begin{array}{c}\stackrel{\&OverBar;}{\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{R}}(u,v)=\frac{1}{m\&times;n}\underset{v=1}{\overset{m}{\mathrm{\&Sigma;}}}\underset{u=1}{\overset{n}{\mathrm{\&Sigma;}}}\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{R}(u,v)\\ \stackrel{\&OverBar;}{\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{G}}(u,v)=\frac{1}{m\&times;n}\underset{v=1}{\overset{m}{\mathrm{\&Sigma;}}}\underset{u=1}{\overset{n}{\mathrm{\&Sigma;}}}\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{G}(u,v)\\ \stackrel{\&OverBar;}{\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{B}}(u,v)=\frac{1}{m\&times;n}\underset{v=1}{\overset{m}{\mathrm{\&Sigma;}}}\underset{u=1}{\overset{n}{\mathrm{\&Sigma;}}}\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{B}(u,v)\end{array}\right.$

Asking for its comprehensive mean is J:

$J=\frac{1}{r+g+b}[r\stackrel{\&OverBar;}{\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{R}}(u,v)+g\stackrel{\&OverBar;}{\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{G}}(u,v)+b\stackrel{\&OverBar;}{\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{B}}(u,v)]$

(6), compare J in J and data base ₀size, regulate the output of cold light source illumination.

Work as J-J ₀≠ 0 o'clock, to cold light source sending controling instruction, regulate the output of cold light source illumination, concrete control method is as follows,

$\left\{\begin{array}{c}V(t+1)=V\left(t\right)-\frac{J-J_0}{K}\\ V_{\min }\&le;V(t+1)\&le;V_{\max }\end{array}\right.$

Wherein, V (t) is current time cold light source running voltage, and V (t+1) is next moment cold light source running voltage, V _max, V _minbe respectively cold light source the highest specified and minimum running voltage.

Therefore realize all the time the intelligence adjusting of its illumination at the whole medical procedure of endoscope, while making observation and computer processing, analysis human internal organs image, can obtain the effect of optimization of illumination.

Described controller 4, according to signal processor 3 control instructions that receive, the forward position that changes its output switching signal goes out now, it is switch controlling signal output phase, thereby make the DC voltage that switch power module 5 is exported produce corresponding variation, and then having changed the running voltage of cold light source 6, cold light source 6 is exported illumination and is obtained corresponding adjusting.

Described switch power module 5, controlled straight-straight switching power circuit of output voltage being formed by electronic power switch device.Controller 4 can produce pulse control signal according to signal processor 3 control instructions, and this pulse control signal is transferred to switch power module 5 control signal inputs; Switch power module 5 just can carry out copped wave to DC voltage input signal wherein according to this pulse control signal, signal after copped wave has corresponding dutycycle, by filtering, smoothing effect wherein, just export the direct voltage output of respective signal processor 3 control instructions.

Described cold light source, cold light source is the light source that utilizes chemical energy, electric energy, bioenergy to excite, and has very good optics and becomes sudden strain of a muscle characteristic.Because its luminance temperature is lower than ambient temperature, thus be called chemiluminescence, and claim this type of light source to be called cold light source.The principle of luminosity of cold light source is under electric field action, produces electron collision excitation fluorescent material and produces luminescence phenomenon.The feature of cold light source is that other energy is almost all converted into visible ray.Cold light source 6 described in the present embodiment, adopts XD-300 series Medical endoscope cold light source.

In the present embodiment, the light that cold light source sends is sent into medical endoscope, and optical signal is transformed into picture signal by medical endoscope, and sends picture signal to signal processor through image pick-up card by its image output interface; Signal processor receives the picture signal of image pick-up card transmission and processes, by setting up classical color image and color characterization data storehouse thereof, the image of Real-time Collection is carried out to colour cast correction, brightness of image correction, and send cold light source illumination output control instruction to controller; Controller is according to the signal processor control instruction receiving, change switch controlling signal output phase, make the DC voltage of switch power module output produce corresponding variation, and then changed the running voltage of cold light source, cold light source output illumination obtains to optimize and regulates.

The present invention can be carried out intelligent decision and optimize by signal processor the output intensity of cold light source illumination to the image information receiving, the intelligence that realizes endoscope's illumination regulates: 1. endoscope's clinical manipulation is very easy, and clinician needn't be for regulating illumination to take great energy, require great effort; 2. no matter how bending endoscope is, and its illumination can realize intelligence and regulates and reach effect of optimization, and no matter manual observation or computer processing all can obtain high-quality, endoscopic images clearly.

Claims (6)

1. an intelligent regulating device for endoscope's illumination, is characterized in that, comprising: medical endoscope, image pick-up card, signal processor, controller, switch power module and cold light source; The image output interface of medical endoscope is connected with the input interface of image pick-up card, the output interface of image pick-up card is connected with the input interface of signal processor, the output interface of signal processor is connected with the input interface of controller, the output interface of controller is connected with the control signal input interface of switch power module, the power input interface of switch power module is connected with unidirectional current output interface, and the output interface of switch power module is connected with the input interface of cold light source; The illuminance that cold light source sends is injected medical endoscope, and optical signal is transformed into picture signal by medical endoscope, and sends picture signal to signal processor through image pick-up card by its image output interface; Signal processor receives the picture signal of image pick-up card transmission and processes, by setting up classical color image and color characterization data storehouse thereof, the image of Real-time Collection is carried out to colour cast correction, brightness of image correction, and send cold light source illumination output control instruction to controller; Controller is according to the signal processor control instruction receiving, change switch controlling signal output phase, make the DC voltage of switch power module output produce corresponding variation, and then changed the running voltage of cold light source, therefore cold light source output illumination obtains to optimize and regulates;

Described signal processor comprises: input interface, signal processing module, DBM and output interface; Wherein: input interface input port receives the data image signal from image pick-up card output, and input interface output port is connected with the input port of signal processing module; The output port of signal processing module is connected with the input port of output interface; DBM carries out data interaction as the memory modules of signal processor by data/address bus and signal processing module; The output port of output interface is connected with the input interface of controller;

Described signal processing module is processed the picture signal receiving, first obtain respectively the R of RGB real-time color image, G, B three primary colours pixel value and average thereof, then the image of Real-time Collection is carried out to colour cast correction, choose again the maximal and minmal value in the three primary colours pixel value after colour cast is proofreaied and correct, carry out brightness of image correction, then ask for image pixel average and comprehensive mean thereof after brightness of image is proofreaied and correct, by the size of classical image pixel comprehensive mean in the image pixel comprehensive mean after movement images gamma correction and data base, the control instruction that regulates cold light source illumination is exported to controller.

2. the intelligent regulating device of endoscope according to claim 1 illumination, is characterized in that, described DBM, and its structure is made up of district, the inner classical color image of each district's storage human organ and color characterization data thereof; The inner classical color image of described human organ, the inner coloured image of all good human organs of the color being obtained by endoscopic images sensor and definition;

Described color character, comprising: three primary colours R(is red in RGB color space), G(is green), B(indigo plant) pixel value R ₀(u, v), G ₀(u, v), B ₀(u, v) and matching ratio coefficient thereof, average

and three maximal and minmal value between average.

3. the intelligent regulating device of endoscope according to claim 1 illumination, is characterized in that, described medical endoscope is made up of cephalic par, bending section, main flexible tube, operating portion, miniature CCD, image output interface, leaded light plug; Wherein cephalic par comprises miniature convex lens object lens, image transmission optical fibre top, Optic transmission fiber end, and miniature convex lens object lens are arranged at the front end of cephalic par, for receiving the reflected light from body surface; Bending section is the stage casing mechanical connecting element of cephalic par and main flexible tube, and the rear end of cephalic par is connected with the front end of bending section, and the rear end of bending section is connected with the front end of main flexible tube, and the image transmission optical fibre rear end in main flexible tube is connected with the input port of miniature CCD; Miniature CCD is miniature charge-coupled image sensor, and the output port of miniature CCD is connected with image output interface; Optic transmission fiber rear end in main flexible tube is connected with leaded light plug optical output port.

4. the intelligent regulating device of endoscope according to claim 3 illumination, it is characterized in that, described leaded light plug light input end mouth is sent cold light source light beam into Optic transmission fiber, through Optic transmission fiber by cold light source beam Propagation to cephalic par throw light on observed object or visual field, the reflected light of observed object is after cephalic par obtains miniature convex lens object lens and converges, image on the end face of image transmission optical fibre, spread out of through image transmission optical fibre, again after miniature convex lens eyepiece amplifies, project on the target surface of CCD and pass through opto-electronic conversion, optical signal is transformed into the image pixel sequence signal of telecommunication, by image output interface, picture signal is transferred to signal processor through image pick-up card.

5. the intelligent regulating device of endoscope according to claim 3 illumination, it is characterized in that, described main flexible tube is except parcel image transmission optical fibre and Optic transmission fiber, also comprising one regulates endoscope head end to spy on the fine steel wire of angle, the front end of fine steel wire and the front end robot of cephalic par are fastening, and the rear end of fine steel wire is connected with the adjusting knob of operating portion.

6. the intelligent regulating device of endoscope according to claim 1 illumination, is characterized in that, described switch power module is controlled straight-straight switching power circuit of output voltage being made up of electronic power switch device.

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