CN102525375B - Endoscope device - Google Patents
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- CN102525375B CN102525375B CN201110302124.1A CN201110302124A CN102525375B CN 102525375 B CN102525375 B CN 102525375B CN 201110302124 A CN201110302124 A CN 201110302124A CN 102525375 B CN102525375 B CN 102525375B
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Abstract
The present invention provides an endoscope device which is provided with the following components: a light source part which is provided with a light source for sending out wideband light, and a filter part which is provided with an optical filtering set that narrows bandwidth of the spectrum of the wideband light as narrow-band light with a preset waveband, wherein the light source part irradiates sequential light; a photographing unit which shoots a photographing image and outputs the information of the photographing image; an image processing unit which performs preset image processing on the information of the photographing image; and a photographing information detection unit which detects out an automatic exposure value or photographing magnification or photographed member information as photographing information, and varies the optical filter set and image processing conditions based on the photographing information according to a mode of changing detection and enhancement degree for structure and component of the photographed member.
Description
Technical field
The present invention relates to the endoscope apparatus by filter, the broadband light such as white illumination light being carried out special light observation as specific narrow band light.
Background technology
In recent years, apply a kind of mucosal tissue to organism always and irradiate specific narrow band of light (narrow band light), and obtain the organizational information of the desired depth of bio-tissue, the so-called endoscope apparatus that can carry out special light observation.This endoscope apparatus can simply by visual for the Biont information emphasized etc., cannot obtain in common observation image in the microstructure of the new vessels such as produced in mucous layer or tela submucosa, pathological changes portion.Such as, when the object of observation is carninomatosis change portion, can the capillary vessel on tissues observed top layer or the state of microstructure in more detail during owing to irradiating the narrow band light of blue (B) to mucosal tissue, therefore, it is possible to diagnose pathological changes portion more accurately.
On the other hand, knownly to depend on the wavelength of light relative to the degree of reaching deeply of the depth direction of bio-tissue due to light, when blueness (B) light that wavelength is short, based on absorption characteristic and the scattering properties of bio-tissue, light only arrives near top layer, absorption, scattering is subject to, therefore, it is possible to observe as the back light of the information mainly comprising textura epidermoidea in depth bounds herein; When green (G) light long for wavelength ratio B light, G light arrives the place darker than the scope of B light arrival, absorption, scattering is subject to, therefore, it is possible to observe as the back light of the information mainly comprising the middle layer and textura epidermoidea within the scope of this; When redness (R) light that wavelength ratio G light is long, light arrives darker tissue, is subject to absorption, scattering, therefore, it is possible to observe as the back light of the information mainly comprising deep tissues and the middle layer within the scope of this.
Namely, knownly to be accepted irradiating each back light that B light, G light and R light obtains by image sensors such as CCD and the picture signal that obtains, mainly comprising the information of textura epidermoidea, the middle layer and the information of textura epidermoidea and the information of deep tissues and the middle layer respectively.
For this reason, in the process that special light is observed, for ease of observing capillary vessel or the microstructure of the tissue surface in bio-tissue, as the narrow band light of irradiating to bio-tissue, do not use the narrow band light being mainly suitable for observing the middle level of bio-tissue and the redness (R) of deep tissues, and only use the narrow band light being suitable for the blueness (B) of observing textura epidermoidea and these the two kinds of narrow band light of narrow band light being suitable for the green (G) of observing the middle layer and textura epidermoidea, the B picture signal (B narrow band data) mainly comprising textura epidermoidea's information obtained by image sensor by irradiation B narrow band light and the G picture signal (G narrow band data) mainly comprising the middle layer and textura epidermoidea's information obtained by image sensor by irradiating G narrow band light is only used to carry out image procossing, monitor etc. shows pseudo color image and observes.
Therefore, in image procossing, the R view data of coloured image is distributed to after the G picture signal obtained by image sensor (G narrow band data) is multiplied by predetermined coefficients, G view data and the B view data of coloured image is distributed to after B picture signal (B narrow band data) is multiplied by predetermined coefficients respectively, generate the pseudo color image be made up of the color image data of 3ch (passage), and be shown in monitor etc.
Therefore, back light based on narrow band light is received by image sensor the image procossing that 2 the GB image signal transformations obtained become to be used for carry out at display part under the narrow band light pattern of the RGB color image data of pseudo-color processing, is different from and the back light based on common light is received by image sensor the image procossing that 3 the RGB image signal transformations obtained become to be used for carry out at display part under the common optical mode of the colored RGB color image data shown.
In addition, even if in the special light observation process using R narrow band light, G narrow band light and B narrow band light, when for the purpose of the capillary vessel observing textura epidermoidea or microstructure, R picture signal (R narrow band data) is not used yet, and use G picture signal and B picture signal to carry out image procossing as above-mentioned, monitor etc. shows pseudo color image and observes.
In this case, in image procossing, similarly also G picture signal is distributed to R view data, B picture signal is distributed to G view data and B view data, and generate the pseudo color image be made up of 3ch color image data, and be shown in monitor etc.
Its result is known, no matter when, the pseudo color image of the display such as monitor all comprises the main B picture signal (B narrow band data) containing textura epidermoidea's information mostly, therefore the capillary vessel of textura epidermoidea or the state of microstructure are showed in further detail, and the capillary vessel of textura epidermoidea or microstructure are easier to observe (with reference to patent documentation 1 and 2).
In above special light observation process, distance between pathological tissues and the irradiation position of special light is near, can draw out bright and be easy to capillary vessel or the microstructure of the tissue surface watched, but but also existing and to become along with the increase of distance that darkness deepens, be difficult to the problem of watching.
In addition, as aforementioned, because of the distance change between pathological tissues and the irradiation position of special light, subject organizes amplification to change, and when therefore there is the Pixel Dimensions change when the blood vessel projected to imaging apparatus, is difficult to the problem recognizing top layer capillary vessel.
And then, when away from camera positions, it not the top layer capillary vessel of one one, but the block one by one in the intensive region of the top layer capillary vessel being called as (brownish) region in brown becomes the object of observation, the image procossing that will be suitable for photographed images is different, but the switching of these image procossing is generally all manually carried out, thus also existing differs carries out the problem that suitable image emphasizes surely.
Patent documentation 1:JP patent No. 3559755 publication
Patent documentation 2:JP patent No. 3607857 publication
Summary of the invention
The object of the present invention is to provide a kind of endoscope apparatus, in special light observation process, operator does not need luminous ratio and the image procossing not only observing photographed images but also adjust the special light such as quantity of light emission and white illumination light wittingly, just can obtain suitable and the brightest photographed images for the observation of the structure of the organisms such as top layer capillary vessel and composition.
In order to solve above-mentioned problem, the invention provides a kind of endoscope apparatus, it is characterized in that, possessing:
Light source portion, it has the light source that injection has the broadband broadband light containing visibility region, with the filter part possessing at least two group optical filter groups, the bandwidth of the spectrum of the described broadband light that described at least two group optical filter groups are penetrated from this light source by constriction is to form as the blueness of narrow band light of wave band specified and the group of the dichroic optical filter of green, and the width of described wave band is different, the described dichroic optical filter of the filter set of each group of this filter part is acted on described broadband light so that the face be made up of described narrow band light order illumination is mapped to the organism becoming subject by described light source portion,
Image unit, it, according to being irradiated to described order light of subject and the back light from described organism successively from described light source portion, being taken the photographed images of described subject, and exports photographed images information;
Graphics processing unit, it implements the image procossing of regulation to described photographed images information; With
Photographic information detecting unit, its using described image unit be used for take the automatic exposure value of described subject or shooting multiplying power or detect as photographic information to the structure of the described organism of the described subject photographed by described image unit, subject information that composition is relevant
Described endoscope apparatus is based on the described photographic information detected by described photographic information detecting unit, in the mode making the structure of described organism of described subject, the detection of composition and degree of emphasizing change, change the image capture conditions in the described optical filter group of described filter part and described graphics processing unit.
In addition, the present invention is preferred, and also have filter set changing unit, it changes the one group of optical filter group selected at least two group optical filter groups described in described filter part based on described photographic information.
Preferably, described photographic information is described automatic exposure value, that optical filter group organized that described filter set changing unit selects the width of described wave band narrow in described automatic exposure value hour at least two group optical filter groups described in described filter part; The optical filter group of that group selecting the width of described wave band wide when described automatic exposure value is large.In addition, preferably, described photographic information is described shooting multiplying power, the optical filter group of described filter set changing unit selects the width of described wave band narrow at least two group optical filter groups described in described filter part that group when described shooting multiplying power is large; In the optical filter group of that group that described shooting multiplying power hour selects the width of described wave band wide.
In addition, preferably, when changing described optical filter group by described filter set changing unit, in the mode that the white balance of described photographed images does not change, change at least one in the hue adjustment of the electric gain of described image unit, camera time and described image procossing.
The present invention also preferably, also there is optics aperture, it regulates the light quantity of described broadband light or the described narrow band light penetrated from the described light source of described light source portion, when changing described optical filter group by described filter set changing unit, in the mode that the lightness of described photographed images does not change, control described optics aperture or change at least one in the hue adjustment of the electric gain of described image unit, camera time and described image procossing.
Preferably, described graphics processing unit has image emphasizing unit, and its frequency changing described photographed images based on described photographic information emphasizes characteristic.In addition, preferably, described image emphasizing unit has frequency band emphasizing unit, and it emphasizes at least plural frequency band of described photographed images, this frequency band emphasizing unit changes frequency based on described photographic information and emphasizes characteristic, and this frequency emphasizes that characteristic comprises makes emphasized described frequency band change.
Preferably, described photographic information is described automatic exposure value, and emphasized described frequency band, along with the increase of described automatic exposure value, is changed to low frequency by described frequency band emphasizing unit.In addition, preferably, described photographic information is described automatic exposure value, and the described frequency band that described frequency band emphasizing unit is emphasized is bandpass characteristics, and described frequency band emphasizing unit changes in the mode of the width increasing the described frequency band emphasized more than during the first setting in described automatic exposure value.Also preferred, described photographic information is described automatic exposure value, and emphasized described frequency band is set to bandpass characteristics in described automatic exposure value for time below the second setting by described frequency band emphasizing unit, changes to high pass characteristic when exceeding described second setting.
Preferably, described photographic information is described shooting multiplying power, and emphasized described frequency band, along with the increase of described shooting multiplying power, is changed to high frequency by described frequency band emphasizing unit.In addition, preferably, the described subject information that described photographic information is and associate in the size of brown areas or the thickness of blood vessel, described image emphasizing unit based on described be that the size of brown areas or the thickness of the described blood vessel frequency that changes described photographed images emphasizes characteristic.
Preferably, described image emphasizing unit has the frequency band emphasizing unit emphasized at least plural frequency band of described photographed images, and this frequency band emphasizing unit comprises the frequency that emphasized described frequency band is changed emphasize characteristic based on described to change in the size of brown areas or the thickness of described blood vessel.Preferably, emphasized described frequency band, along with the diminishing of thickness of described blood vessel, is changed to high frequency by described frequency band emphasizing unit.Preferably, described frequency band emphasizing unit described be of a size of below given size in brown areas time the described frequency band emphasized be bandpass characteristics, change in the mode making the width of emphasized described frequency band increase when the described size in brown areas exceedes described given size.
Also preferred, described photographic information detecting unit detects described photographic information according to described photographs.In addition, preferably, described photographic information detecting unit detects described automatic exposure value according to the lightness of described photographs.
According to endoscope apparatus of the present invention, in special light observation process, shooting is become the automatic exposure value needed for organism or the shooting multiplying power of subject, or detect as photographic information to point relevant subject information that is configured to of the organism be taken, and based on detected photographic information to make the structure of organism, the mode that the detection of composition and degree of emphasizing change is to change the different optical filter group of bandwidth and image capture conditions, therefore when carrying out special light observation, the situation of top layer capillary vessel is observed in such as amplification pathological changes portion or peri position photography pathological changes portion, or amphi position photography pathological changes portion observe top layer capillary vessel intensive in brown areas when, operator all without the need to observing photographed images while adjust or change the luminescent condition of these light sources and the image capture conditions of photographed images wittingly, just can observe for the special light of pathological changes portion or top layer capillary vessel etc. and obtain suitable and the brightest photographed images.
Accompanying drawing explanation
Fig. 1 is the block diagram of the embodiment that the entirety of the endoscope apparatus schematically showing one embodiment of the present invention is formed.
Fig. 2 be represent arrange in the light source portion of the endoscope apparatus shown in Fig. 1 dismountable (A) first filter set, (B) second filter set, (C) common light observation filter set the schematic diagram of an example.
Fig. 3 is the block diagram comprising the signal processing system in each portion formed in detail of an embodiment of the processor representing the endoscope apparatus shown in Fig. 1.
Fig. 4 represents that the filter set selection portion shown in Fig. 3 possesses, for selecting the curve chart of an embodiment of the form of filter set according to automatic exposure (AE) value.
Fig. 5 is the curve chart of the embodiment representing the frequency intensity filter that the structure portion of emphasizing of the special light image handling part shown in Fig. 3 possesses.
Fig. 6 is the flow chart representing the embodiment flow process that the narrow band light implemented in the endoscope apparatus shown in Fig. 1 is observed.
Symbol description:
10-endoscope apparatus, 12-endoscope, 14-light source portion, 16-processor, 18-input and output portion, 20-white light source, 22-light source aperture, 24-filter part, 24A-first filter set, 24B-second filter set, the common light-filter group of 24C-, 26-collecting lens, 28-optical fiber, 30A-irradiates mouth, 30B-light accepting part, 32-imaging apparatus, 34-indicator cable, 36-image processing system, 38-display part (monitor), 40-input part (pattern switching part), 42-recording unit (recording equipment), 44-CDSAGC circuit, 46-A/D changer (A/D converter), 48-light source control portion, 50-light quantity calculating part, 52-DSP (digital signal processor), 54-noise removing circuit, 56-photographic information calculating part, 58-filter set selection portion, 60-image procossing switching part (switch), the common light image handling part of 62-, the special light image handling part of 64-, 66-image display signal generating unit, 68-colour switching portion, 70, 76-color emphasizes portion, 72, 78-structure emphasizes portion, the special light color transformation component of 74-.
Detailed description of the invention
Below based on preferred implementation shown in the drawings, the endoscope apparatus that the present invention relates to is described in detail.
Fig. 1 is the block diagram of the embodiment that the entirety of the endoscope apparatus schematically showing one embodiment of the present invention is formed.
As shown in the drawing, endoscope apparatus 10 of the present invention has: endoscope 12, light source portion 14, processor 16 and input and output portion 18.Here, light source portion 14 and processor 16 form the control device of endoscope 12, and endoscope 12 is connected with light source portion 14 optics, is electrically connected with processor 16.In addition, processor 16 is electrically connected with input and output portion 18.Further, input and output portion 18 has: display part (monitor) 38, output display image information etc.; Recording unit (recording equipment) 42 (with reference to Fig. 3), output image information etc.; And input part (pattern switching part) 40, the UI (user interface) of input operation as the pattern switching, function setting etc. that accept common observing pattern (also referred to as common optical mode) or special smooth observing pattern (also referred to as special optical mode) etc. plays function.
Endoscope 12 is fujinon electronic video endoscopes of the image pickup optical system with illumination light system and the observed region of shooting penetrating illumination light from its front end.In addition, although not shown, endoscope 12 possesses: endoscope insertion part, is inserted in subject; Operating portion, for carrying out the bending operation of endoscope insertion part front end, the operation of observation; And adapter, endoscope 12 can be freely releasably connected with the light source portion 14 of control device and processor 16.In addition, although not shown, in the inside of operating portion and endoscope insertion part, be provided with and insert the various pipeline such as the forceps channel of harvesting of tissue's purpose processor tool etc., the pipeline of air feed water supply.
At the fore-end of endoscope 12, as shown in Figure 1, possess to the irradiation mouth 30 of observed area illumination light with to irradiate mouth 30 adjacent and receives the light accepting part 30B of back light in observed region, be configured with the imaging apparatus (sensor) 32 of CCD (ChargeCoupled Device) imageing sensor of the image information obtaining observed region or CMOS (Complementary Metal-OxideSemiconductor) imageing sensor etc. in light accepting part 30B side.The cover plate (cover glass) or camera lens (not shown) that form illuminating optical system is configured with at the irradiation mouth 30A of endoscope 12, be configured with the cover plate or camera lens (not shown) that form lamp optical system at light accepting part 30B, be configured with the object lens (not shown) forming image pickup optical system at the sensitive surface of the imaging apparatus 32 of sensitive surface 30B.Here, because imaging apparatus 32 is the elements of the back light receiving the face order light be made up of the narrow band light of different colours as described later, as long as so monochromatic image sensor, also can be at light area configuration coloured filter (filter; Such as, RGB coloured filter or complementary color filter) colored image sensor or complementary color sensor.
In addition, object lens possesses object lens (not shown).The visual angle (angle of visual field) of object lens is uniquely obtained based on the size of lens or focal length, by the photographed images of image pickup optical system imaging when endoscope 12 front end is close to becoming large during subject, when away from time diminish, subject when therefore taking subject and the multiplying power between photographed images are made a video recording multiplying power, can obtain according to the visual angle of photographs.
Photography multiplying power can be obtained although it is so, but ask the method for photography multiplying power to be not limited thereto, can various method be adopted.
Such as, No. 2000-230807, TOHKEMY is like that open, by measure by the directional light parallel with the optical axis of image pickup optical system from lamp optical system via laser instrument etc. to subject irradiate and by the imaging on image pickup optical system of this back light real image, relative to the length in the visual field of making a video recording, can automatically detect shooting multiplying power.
And then object lens, in order to change shooting multiplying power, also can have high magnification camera mechanism, it possesses can along the imaging len of optical axis direction movement (not shown) and the lens actuating device (not shown) for this imaging len mobile.In this case, the actuator that lens actuating device is such as made up of piezoelectric element forms, and to move thus can change shooting multiplying power further by making imaging len along optical axis direction.
Endoscope insertion part can free bend based on the operation of operating portion, according to using the position etc. of subject of endoscope 12 can bend to any direction and arbitrarily angled, the direction of observation of mouth 30A and light accepting part 30B and imaging apparatus 32 can be irradiated towards the look-out station expected.
Light source portion 14 is made up of white light source 20, light source aperture 22, the filter part 24 possessing removable filter device group (filterset), collecting lens 26 and optical fiber 28.
White light source is the white illumination light light source that common optical mode and these two patterns of special optical mode are used, such as, be equipped with as luminous source by xenon light source.Certainly, exciting light sources and the pseudo-white light based on fluorophor can also be used.
The irradiation light quantity of white light source 20 is adjusted by the range shorter of light source aperture 22.
In addition, by the irradiation light that light source aperture 22 reduces the scope, cause is through filter part 24, the bandwidth of luminescent spectrum narrows and becomes the narrow band light of regulation, optically focused is carried out by collecting lens 26, be input in optical fiber 28, and be sent to adapter portion, thus propagate into the leading section of endoscope 12 by the optical fiber 28 of the lamp optical system of formation endoscope 12.
Filter part 24 as shown in Figure 2, prepared formation discoid, be that rotating shaft is combined with through 2 kinds of different (such as, B of frequency band with center
1, G
1) or multiple filter set of optical filter of 3 kinds (such as, RGB), the filter set therefrom selected, is configured in the light path that white light source 20 irradiates white illumination light.
Filter part 24, such as shown in Fig. 2 (A) ~ (C), possesses the first filter set 24A of special light observation and this 3 set filter group of common light-filter group 24C of the second filter set 24B and the observation of common light.Filter part 24 can also possess multiple 3rd filter set (such as, half first and second filter set of spectrum Amplitude Ration is wide) that the narrow band light beyond first and second filter set is observed.These filter set, the filter set of one of them is changed unit by not shown filter set and is configured in the light path of white illumination light of filter part 24, and replaces according to photographic information.
The first filter set 24A that special light is observed such as shown in Fig. 2 (A), by optical filter B
1(center be 440nm, half spectrum amplitude be 25nm) and G
1(center be 540nm, half spectrum amplitude be 25nm) composition, the second filter set 24B such as Suo Shi Fig. 2 (B) by optical filter B
2(center be 440nm, half spectrum amplitude be 40nm) and G
2(center be 540nm, half spectrum amplitude be 60nm) composition.In addition, the common light-filter group that common light is observed such as is made up of the filter that RGB is trichroism as Suo Shi Fig. 2 (C).In addition, by the optical filter B of the first filter set 24A
1centre wavelength be the blue laser of 440nm, according to the structure of organism and the spectroscopic properties of composition, preferably have consistent and by the narrow band light of the band of arrowband, therefore the structure of organism and the Detection capability of composition better.
In addition, illustrated example is the filter set that filter part 24 prepares, formed by the filter set 24A ~ 24C be made up of 3 pieces of revolving filter plates, but the present invention is not limited thereto, also can be made up of the filter set of more than 2 groups being configured to concentric circles on 1 piece of revolving filter plate.
White light source 20, light source aperture 22 and filter part 24, controlled by light source control portion 48, the filter set of irradiating white light from white light source 20, regulated light quantity by light source aperture 22 (size regulating light quantity aperture 22) and the first filter set 24A, the second filter set 24B and common light-filter group 24C changes the replacing of unit, is all carry out based on the instruction from light source control portion 48.
Be configured at the filter set in the light path of the white illumination light of filter part 24, rotated by not shown filter rotary unit, filter is changed every predetermined distance, therefore irradiate the face order light be made up of different narrow band light every predetermined distance from light source portion 14, by taking the back light of the face order light be made up of these different narrow band light, carry out the photography of face order.
Such as, when use first filter set 24A makes a video recording, due to the irradiation light from white light source 20 every predetermined distance through optical filter B
1and G
1, therefore irradiate B every predetermined distance
1narrow band light and G
1narrow band light.In addition, when use second filter set 24B makes a video recording, B is irradiated every predetermined distance
2narrow band light and G
2narrow band light; When using common light-filter group 24C to make a video recording, irradiate R light, G light, B light every predetermined distance.
Optical fiber 28 is multimode fibres, can use that line core diameter is 105 μm, cladding diameter is 125 μm, comprise the diameter of exocuticle protective layer as an example
it is the small diameter fiber cable of 0.3 ~ 0.5mm.
As above-mentioned, the white light irradiated from white light source 20 becomes the narrow band light of regulation by filter part 24, and from the irradiation mouth 30A of the leading section of endoscope 12 to the observed area illumination of subject.Afterwards, from the back light in observed region irradiating narrow band light, via light accepting part 30B imaging on the sensitive surface of imaging apparatus 32, observed region is taken by imaging apparatus 32.
From the picture signal of the photographed images of imaging apparatus 32 output after shooting, be input in the image processing system 36 of processor 16 by indicator cable (scope cable) 34.
Then, the picture signal of the photographed images photographed by imaging apparatus 32 like this, the signal processing system being included the image processing system 36 of processor 16 carries out image procossing, and outputs in monitor 38 or recording equipment 42, observes for user.
Fig. 3 is the block diagram of the signal processing system in each portion of the detailed formation of an embodiment of the processor representing endoscope apparatus of the present invention.
As shown in the figure, the signal processing system of endoscope apparatus 10 has: the signal processing system (image processing system 36) of the signal processing system of endoscope 12, the signal processing system of light source 14, processor 16, the monitor 38 in input and output portion 18, input part (pattern switching part) 40 and recording equipment 42.
The signal processing system of endoscope 12 is as the signal processing system of the picture signal of the photographed images exported from imaging apparatus 26 after shooting, have: CDSAGC circuit 44, for carrying out correlated double sampling (CDS) or automatic growth control (AGC) to the photographed images signal as analogue signal; And A/D changer (A/D converter) 46, the analog picture signal undertaken by CDSAGC circuit 44 after sampling and gain control is transformed into data image signal.Carry out the data image signal after A/D converts by A/D changer 46, be imported in the image processing system 36 of processor 16 via adapter portion.
In addition, the signal processing system of light source portion 14 be carry out the on-off control of white light source 20, the size of light source aperture 22 controls and the replacing of filter set in filter part 24 and the control of rotation, and has the light source control portion 48 to irradiating the light quantity of light and frequency band and controlling.
Here, light source control portion 48 starts light source switches signal together according to the work with endoscope apparatus 10 makes white light source 20 light, or the replacing carrying out the filter set in filter part 24 according to the switching signal of the common optical mode and special optical mode that carry out self mode switching part 40 controls (switching of the first filter set 24A and the second filter set 24B (special optical mode) and the 3rd filter set 24C (common optical mode)), or according to the B light of the image calculated by light quantity calculating part 50 described later and the light quantity of G light etc. or luminous intensity etc., control the luminous intensity of white light 34, namely the size of the light source aperture 22 of the irradiation light from light source 20 is reduced.Namely, light source control portion 48 plays function as filter set selection portion 58 described later and filter set changing unit, this filter set changing unit, based on photographic informations such as the subject information associated by automatic exposure (AE) value (light value) detected by photographic information test section 56 described later, photography multiplying power or the structure in the organism such as the size of brown areas or the thickness of blood vessel and composition, changes and select one group of optical filter group in many groups optical filter group of filter part 24.
In addition, the signal processing system of processor 16 is image processing system 36 (with reference to Fig. 1), and has light quantity calculating part 50, DSP (digital signal processor) 52, noise removing circuit 54, image procossing switching part (switch) 60, common light image handling part 62, special light image handling part 64, image display signal generating unit 66.
Light quantity calculating part 50 uses the data image signal inputted via adapter from the A/D changer 46 of endoscope 12, calculates light quantity, the B light of the light quantity of such as B light and the light quantity of G light and image and the light quantity etc. of G light of the back light that imaging apparatus 26 receives.
Further, light quantity calculating part 50, the rgb value based on the photographed images calculated calculates the lightness (brightness value) of photographed images, and outputs in photographic information calculating part 56.
Photographic information calculating part 56 calculates photographic information based on the lightness of the photographed images calculated.Here, the subject information etc. associated by automatic exposure (AE) value (light value) for taking subject (organism), multiplying power of photographing or the structure in the organism such as the size of brown areas or the thickness of blood vessel and composition can be enumerated as photographic information.
Here, automatic exposure value (AE value) is the parameter of exposure for automatically determining when making a video recording, based on the back light detected by imaging apparatus 26 light quantity (lightness) and determine.Even if in moving image photography, the light quantity also passing through the back light in the photography time of the every frame determined according to the depot accumulation time (depot accumulation time of CCD or CMOS corresponding with RGB coloured filter) of imaging apparatus 26 is determined.
Shooting multiplying power, as aforementioned, can be obtained according to the visual angle of photographs, usually automatically detect as described above.In addition, when image pickup optical system has high magnification camera mechanism, shooting multiplying power according to the lenticular spacing of object lens and imaging len from and change.
In addition, subject information refers to, the region that during longshot, the top layer capillary vessel in pathological changes portion etc. is intensive, with brown in the size of brown areas or macrophotography or up short time the organism such as each blood vessel thickness the structure information relevant with composition.Size in brown areas or blood vessel thickness, by extract from photographed images with brown in brown areas or extract each blood vessel to detect.Extraction in brown areas, can adopt the various known methods detecting color or shape.In the present invention, preferably when the size in brown areas detected in photographed images or the change of blood vessel thickness, the image procossing being applied to photographed images is changed.
When detecting these photographic informations, export to filter set selection portion 58 and special light image handling part 64 described later.
Filter set selection portion 58, based on the photographic information detected by photographic information test section 56, to be photographed required filter set from selecting filter part 24 in pre-prepd filter set (such as, the first filter set 24A and the second filter set 24B).Filter set selection portion 58 such as has the form of relation between the expression AE value shown in Fig. 4 and filter set, selects the filter set that be configured at filter part 24 based on the AE value calculated and this form.
The information of the filter set be selected is output in light source control portion 48.
In addition, when the filter set that should be configured at filter part 24 changes, the white balance of photographed images also changes, therefore the information of the filter set be selected is exported to CDSAGC44, based on the information of this filter set 24, gain for the CDSAGC44 obtaining white balance is also changed, and thus the electric gain of imaging apparatus 26 is changed.
DSP52 (digital signal processor), after detecting light source light quantity by light quantity calculating part 50, carries out gamma-corrected and color correct process to the data image signal exported from A/D changer 46.
Noise removing circuit 54, such as by the noise remove method in the image procossing such as moving average method or median filter method, removes noise from the data image signal after implemented gamma-corrected and color correct process by DSP52.
Like this, be input to the data image signal processor 16 from endoscope 12, implemented the pre-treatment of gamma-corrected, color correct process and noise remove etc. by DSP52 and noise removing circuit 54.
Image procossing switching part 60 switches the instruction (handover information) based on pattern switching part (input part) described later by the common light image handling part 62 being delivered to rear class by the data image signal of pre-treatment or the switch delivered in special light image handling part 64.
In addition, in the present invention, for the ease of difference, the data image signal before the image procossing undertaken common light image handling part 62 and special light image handling part 64 is called picture signal, and the data image signal after image procossing is called view data.
Common light image handling part 62 is under common optical mode, implements the part of the common light image procossing be applicable to based on the complete data image signal of the pre-treatment of white light, and there is colour switching portion 68, color emphasizes that portion 70 and structure emphasize portion 72.
The data image signal of 3 passages of the RGB that the pre-treatment of 68 pairs, colour switching portion is complete carries out the colour switching process of the matrix disposal, greyscale transform process, three-dimensional LUT process etc. of 3 × 3, and is transformed into the rgb image data that colour switching is disposed.
Color emphasizes portion 70, be accompanied by the heterochromia between blood vessel in picture and mucosa, for emphasizing blood vessel thus being easy to check, the rgb image data be disposed to colour switching has the process of picture in mind, such as observe the average color of picture entirety, implement to make this color to obtain the process emphasized along the direction relative mean values of the heterochromia between additional vascular and mucosa.
Structure emphasizes portion 72, color is emphasized to the rgb image data be disposed, and the structure carrying out acutance or emphasizing contour etc. emphasizes process.
Emphasize that portion 72 implements the rgb image data that structure emphasizes process by structure, be input to image display signal generating unit 66 from common light image handling part 62 by the rgb image data complete as common light image procossing.
Special light image handling part 64, it is the part implementing special light image procossing under special optical mode, special light image procossing is applicable to the complete data image signal of pre-treatment based on B light and G light, B light and G light become narrow band light by filter set 24, and there is special light color transformation component 74, color emphasizes that portion 76 and structure emphasize portion 78.
Special light color transformation component 74 distributes to R view data after the G picture signal of the data image signal of 3 passages of RGB complete for inputted pre-treatment is multiplied by regulation system, G view data and B view data is distributed to after predetermined coefficients is multiplied by respectively to this B picture signal, and after generating rgb image data, to generated rgb image data, the colour switching process of carrying out 3 × 3 matrix disposals, greyscale transform process, three-dimensional LUT process etc. same with colour switching portion 68.
Color emphasizes that portion 76 and color are emphasized in the same manner as portion 70, blood vessel in attached and picture and the heterochromia between mucosa, for emphasizing that blood vessel is to be easy to observe, to the rgb image data that colour switching is disposed, carry out the process having picture in mind, such as observe the average color of picture entirety, implement to make this color obtain the process emphasized along the direction relative mean values being accompanied by heterochromia between blood vessel and mucosa.
Structure emphasizes that portion 78 and structure are emphasized in the same manner as portion 72, emphasizes that the rgb image data be disposed carries out the Construction treatment of acutance or emphasizing contour etc. to color.
In addition, except the Construction treatment that structure emphasizes portion 72, structure emphasizes portion 78 also based on photographic information, the such as AE value from photographic information calculating part 56, emphasizes that the rgb image data be disposed carries out frequency and emphasizes process to aforesaid color.
The frequency of carrying out here emphasizes process, as shown in Fig. 5 (A) ~ Fig. 5 (C), different according to the difference of AE value.Here, as the typical example of photographic information, to using the situation of AE value to be illustrated, but the present invention is not limited thereto.
When AE value is less than the first setting (α), namely imagine endoscope distal end close to subject and necessary light quantity can be less amplifying observation when, top layer capillary vessel is set to photography target, for making the structure of fine top layer capillary vessel can be separated respectively as fine rule, can emphasize that the frequency of HFS emphasizes that filter is applied to aforesaid rgb image data as Suo Shi Fig. 5 (A).
In addition, when AE value is in the prescribed limit (scope of α ~ β) between the first setting and the second setting, namely imagine endoscope distal end a little away from subject and need the close shot of the light quantity more a little than amplifying observation to observe when, photography target will be envisioned for one by one than the slightly large capillary vessel of the situation being configured to photography target thin with top layer capillary vessel, for the enable environment emphasizing top layer capillary vessel, as shown in Fig. 5 (B), can emphasize that the frequency of intermediate-frequency section emphasizes that filter is applied to aforesaid rgb image data.
In addition, when AE value is larger than the second setting (β), namely imagine endoscope distal end away from subject and need more light quantities distant view observe when, not top layer capillary vessel one by one, but intensive for the top layer capillary vessel region be called as in brown areas with brown existed as block is assumed to be photography target.
Be called as the region in brown areas, be considered to early-stage cancer, great majority are about 1mm, wherein also have the situation of 2mm, 3mm.When using the filter of bandpass characteristics this frequency band will be emphasized, can not get emphasizing when departing from a little from this band passband, therefore in order to emphasize all in brown areas of all size, the filter of high pass characteristic can be adopted.
Thus, when by when being assumed to be photography target in brown areas, as shown in Fig. 5 (C), preferably can emphasize as frequency, the high pass filter of high frequency entirety emphasizes that filter is applied to aforesaid rgb image data.
Emphasize that portion 72 implements based on AE value the rgb image data that optimum frequency emphasizes process by structure, be input to image display signal generating unit 66 from special light image handling part 64 by the rgb image data complete as special light image procossing.
Image display signal generating unit 66, by rgb image data complete for the image procossing inputted from common light image handling part 62 under common optical mode, be transformed into in monitor 38 as soft copy (soft copy) image display display image signals or in recording equipment 42 as hard copy (hard copy) image export display image signals; By rgb image data complete for the image procossing inputted from special light image handling part 64 under special optical mode, be transformed into in monitor 38 as softcopy image display display image signals or in recording equipment 42 as hard copy images export display image signals.
Monitor 38, obtained by imaging apparatus 26 after irradiating white light under common optical mode, and show as soft copy based on the common observation image of the display image signals after implemented pre-treatment and common light image process by processor 16, will under special optical mode except white light, obtained by imaging apparatus 26 after also irradiating special light, and observe image based on the special light of the display image signals after implemented pre-treatment and special light image process by processor 16 and show as softcopy image.
Recording equipment 42 also, exports under common optical mode irradiating the common observation image that obtains of white light as hard copy images, observes image export irradiating special light that white light and special light obtains under special optical mode as hard copy.
In addition, as required, the display image signals generated by image display signal generating unit 66 also can be used as image information and is stored in the not shown storage part be made up of memorizer or accumulator apparatus.
On the other hand, pattern switching part (input part) 40 has the mode switch button for switching common optical mode and special optical mode, and the mode switching signal carrying out self mode switching part 40 is imported in the light source control portion 48 of light source 14.Here, although pattern switching part 40 is configured as the input part 40 in input and output portion 18, also can be configured in processor 16, the operating portion of endoscope 12 or light source portion 14.In addition, carry out the switching signal of self mode switching part 40, be output in light source control portion 48 and image procossing switching part 60.
Endoscope apparatus of the present invention is formed substantially as described above.
Below, utilize Fig. 6, according to each step, the effect of endoscope apparatus of the present invention is described.
In the present embodiment, first, under common optical mode, common light observation is carried out.White light source 20 is lit, and carries out common light image process by common light image handling part 64 to the image data based on white light.
Here, switched to special optical mode by user.User is output mode switching signal (opening special light) by operator scheme switching part 40, and the image procossing in image procossing switching part 60 is switched to special optical mode (S10).
Then, also to the light source control portion 40 input pattern switching signal of light source portion 14, by light source control portion 40, the common light-filter group 24C being configured at filter part 24 is switched to the first filter set 24A (S12).
When the filter set of filter part 24 is switched to the first filter set 24A, regulate light source aperture 22 correspondingly, and expect the irradiation light (S14) of light quantity from white light source 20 to the first filter set input.
Next, in filter part 24, the first filter set 24A rotates with the speed of regulation, towards subject, and narrow band light B
1with narrow band light G
1alternately (S16) is irradiated at predetermined intervals as face order light.
The narrow band light B alternately irradiated successively
1with narrow band light G
1reflected by subject respectively, incide in imaging apparatus 30 as back light, and alternately obtain photographed images information (S18) by imaging apparatus 30.
Each photographed images information obtained by imaging apparatus 30, after adjusting white balance, being transformed into numerical data, is sent in light quantity calculating part 50.In light quantity calculating part 50, calculate lightness (brightness value) (S20) of this photographed images (RGB image) according to each photographed images information.
The information of the lightness (brightness value) of the RGB image calculated by light quantity calculating part 50, is sent in photographic information calculating part 56, calculates the AE value (S22) of shooting.
In addition, also AE value be can replace, the photography multiplying power in shooting or subject information (size in brown areas or the thickness etc. of blood vessel) calculated.
Filter set selection portion 58 and special light image handling part 64 is imported into by the AE value calculated.
Filter set selection portion 58 receives the AE value calculated, and again selects filter set (S24) based on this AE value.Filter set selection portion 58 as shown in Figure 4, possesses the form representing relation between AE value and corresponding filter set, and selects filter set (such as, the second filter set 24B) according to AE value.The information of the filter set be selected, outputting in CDSAGC44 to adjust white balance gains, outputting in light source control portion 48 in addition in order to filter set 24 is replaced with selected filter set.
Light source control portion 48 is based on the information of the filter set be selected, unit is changed by not shown filter set, first filter set 24A of filter part 24 is replaced with the filter set that is selected (such as, second filter set 24B), control light source aperture 22 (S26) to make the mode that the irradiation light quantity from white light source is regulation light quantity.
In addition, CDSAGC44 adjusts white balance gains (S28) based on the information of the filter set be selected.
When irradiating light quantity change, white balance gains also changes correspondingly, therefore adjusts CDSAGC and keeps certain value to make white balance gains.In addition, also can replace the adjustment of the white balance gains of CDSAGC, and change the hue adjustment of camera time or image procossing.
In addition, based on the AE value calculated by photographic information calculating part 56, change the image procossing (S30) corresponding to photographed images.Based on the image procossing that AE value changes, emphasize that portion 80 carries out by the structure of special light image handling part 64.
After the filter set of filter part 24 changes, carry out narrow band light observation.From the white light that white light source 20 irradiates, reduced into regulation light quantity by light source aperture 22, and incided the filter set after change 24 (such as, the second filter set 24B).Incident white light is alternately narrow band light B by the second filter set 24B at predetermined intervals
2with narrow band light G
2, and alternately irradiated by the irradiation mouth 30A of optical fiber 28 from endoscope 12 front end.
In narrow band light is observed, the photographed images information obtained successively is output in special light image handling part 64, and emphasizes that portion 76 implements aforementioned image procossing by special light color transformation component 74 and color, is then input to structure and emphasizes in portion 78.Emphasize in portion 78 at structure, the frequency recorded according to AE value application drawing 5 (A) ~ Fig. 5 (C) as described above emphasizes filter (S32).
In special light image handling part 64, the application frequency corresponding to AE value emphasizes filter, is subject to the image information after image procossing and is output in image display signal generating unit 66.Image display signal generating unit 66, generates and output image shows signal according to this image information.
This image display signal be output, is monitored device 38 as special light image and shows, and is recorded device 42 and records (S34).
Above, endoscope apparatus of the present invention has been described in detail, but the present invention is not limited to above-mentioned embodiment, can various improvement and change be carried out without departing from the spirit and scope of the present invention.
Claims (16)
1. an endoscope apparatus, is characterized in that, possesses:
Light source portion, it has the light source that injection has the broadband broadband light containing visibility region, with the filter part possessing at least two group optical filter groups, the bandwidth of the spectrum of the described broadband light that described at least two group optical filter groups are penetrated from this light source by constriction is to form as the blueness of narrow band light of wave band specified and the group of the dichroic optical filter of green, and the width of described wave band is different, the described dichroic optical filter of the optical filter group of each group of this filter part is acted on described broadband light by described light source portion, to irradiate the face order light be made up of described narrow band light,
Image unit, it, according to the back light from subject of described the order light irradiated successively from described light source portion, is taken the photographed images of described subject, and exports photographed images information;
Graphics processing unit, it implements the image procossing of regulation to described photographed images information; With
Photographic information detecting unit, its using described image unit be used for take the automatic exposure value of described subject or shooting multiplying power or detect as photographic information to the structure of the described subject of being taken by described image unit, subject information that composition is relevant
Described light source portion has filter set changing unit, and it is based on described photographic information, at least two group optical filter groups described in described filter part, optionally change one group of optical filter group,
Described graphics processing unit has image emphasizing unit, its frequency changing described photographed images emphasizes characteristic, described image emphasizing unit, based on the described one group of optical filter group changed by described filter set changing unit and photographic information, in the mode making the structure of described subject, the detection of composition and degree of emphasizing change, change frequency and emphasize characteristic.
2. endoscope apparatus according to claim 1, is characterized in that,
Described photographic information is described automatic exposure value,
Described filter set changing unit, in the optical filter group of that group that described automatic exposure value hour selects the width of described wave band narrow at least two group optical filter groups described in described filter part; The optical filter group of that group selecting the width of described wave band wide when described automatic exposure value is large.
3. endoscope apparatus according to claim 1, is characterized in that,
Described photographic information is described shooting multiplying power,
The optical filter group of described filter set changing unit selects the width of described wave band narrow at least two group optical filter groups described in described filter part that group when described shooting multiplying power is large; In the optical filter group of that group that described shooting multiplying power hour selects the width of described wave band wide.
4. endoscope apparatus according to claim 1, is characterized in that,
When changing described optical filter group by described filter set changing unit, in the mode that the white balance of described photographed images does not change, change at least one in the hue adjustment of the electric gain of described image unit, camera time and described image procossing.
5. endoscope apparatus according to claim 1, is characterized in that,
Also have optics aperture, it regulates the light quantity of described broadband light or the described narrow band light penetrated from the described light source of described light source portion,
When changing described optical filter group by described filter set changing unit, the mode do not changed with the lightness of described photographed images controls described optics aperture, or, change at least one in the hue adjustment of the electric gain of described image unit, camera time and described image procossing.
6. endoscope apparatus according to claim 1, is characterized in that,
Described image emphasizing unit has frequency band emphasizing unit, and it emphasizes at least plural frequency band of described photographed images,
This frequency band emphasizing unit, comprises based on described photographic information change the frequency that emphasized described frequency band is changed and emphasizes characteristic.
7. endoscope apparatus according to claim 6, is characterized in that,
Described photographic information is described automatic exposure value,
Emphasized described frequency band, along with the increase of described automatic exposure value, is changed to low frequency by described frequency band emphasizing unit.
8. the endoscope apparatus according to claim 6 or 7, is characterized in that,
Described photographic information is described automatic exposure value,
The described frequency band that described frequency band emphasizing unit is emphasized is bandpass characteristics,
Described frequency band emphasizing unit, when described automatic exposure value is more than the first setting, changes in the mode of the width increasing emphasized described frequency band.
9. the endoscope apparatus according to claim 6 or 7, is characterized in that,
Described photographic information is described automatic exposure value,
Described frequency band emphasizing unit, being set to bandpass characteristics for time below the second setting by emphasized described frequency band in described automatic exposure value, changing to high pass characteristic when exceeding described second setting.
10. endoscope apparatus according to claim 6, is characterized in that,
Described photographic information is described shooting multiplying power,
Emphasized described frequency band, along with the increase of described shooting multiplying power, is changed to high frequency by described frequency band emphasizing unit.
11. endoscope apparatus according to claim 1, is characterized in that,
Described photographic information is and is the described subject information that the size of brown areas or the thickness of blood vessel associate,
Described image emphasizing unit, emphasizes characteristic based on the described frequency changing described photographed images in the size of brown areas or the thickness of described blood vessel.
12. endoscope apparatus according to claim 11, is characterized in that,
Described image emphasizing unit has the frequency band emphasizing unit emphasized at least plural frequency band of described photographed images,
This frequency band emphasizing unit comprises the frequency that emphasized described frequency band is changed emphasize characteristic based on described to change in the size of brown areas or the thickness of described blood vessel.
13. endoscope apparatus according to claim 12, is characterized in that,
Emphasized described frequency band, along with the diminishing of thickness of described blood vessel, is changed to high frequency by described frequency band emphasizing unit.
14. endoscope apparatus according to claim 12, is characterized in that,
Described frequency band emphasizing unit described in brown areas be of a size of below given size time, the described frequency band emphasized is bandpass characteristics, when the described size in brown areas exceedes described given size, change in the mode making the width of emphasized described frequency band increase.
15. endoscope apparatus according to claim 1 to 6 any one, is characterized in that,
Described photographic information detecting unit detects described photographic information according to described photographed images.
16. endoscope apparatus according to claim 15, is characterized in that, described photographic information detecting unit detects described automatic exposure value according to the lightness of described photographed images.
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| JP2010219249A JP5582948B2 (en) | 2010-09-29 | 2010-09-29 | Endoscope device |
| JP2010-219249 | 2010-09-29 |
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| JP2014128394A (en) | 2012-12-28 | 2014-07-10 | Hoya Corp | Endoscope device |
| EP2979618B1 (en) * | 2013-03-27 | 2018-11-28 | FUJIFILM Corporation | Image processing device for operating endoscope system |
| JP5654167B1 (en) * | 2013-07-03 | 2015-01-14 | 富士フイルム株式会社 | Endoscope system and operating method thereof |
| JP5925169B2 (en) * | 2013-09-27 | 2016-05-25 | 富士フイルム株式会社 | Endoscope system, operating method thereof, and light source device for endoscope |
| JP2016067373A (en) * | 2014-09-26 | 2016-05-09 | 富士フイルム株式会社 | Light source device for endoscope and endoscope system |
| CN105748029B (en) * | 2016-02-18 | 2017-09-29 | 深圳开立生物医疗科技股份有限公司 | A kind of endoscopic imaging system |
| CN109561812B (en) * | 2016-11-01 | 2022-05-03 | 奥林巴斯株式会社 | Image processing apparatus |
| CN110049709B (en) | 2016-12-07 | 2022-01-11 | 奥林巴斯株式会社 | Image processing apparatus |
| US11388323B2 (en) * | 2018-02-05 | 2022-07-12 | Sony Corporation | Imaging apparatus and imaging method |
| JP7165936B2 (en) | 2018-04-13 | 2022-11-07 | 国立研究開発法人理化学研究所 | TRAINING DEVICE, IMAGE PROCESSING METHOD, PROGRAM, AND INFORMATION RECORDING MEDIUM |
| CN112601486B (en) * | 2018-10-22 | 2024-05-24 | 奥林巴斯株式会社 | Image processing device, image processing method, endoscope system, and endoscope observation method |
| CN113677250A (en) * | 2019-04-11 | 2021-11-19 | 奥林巴斯株式会社 | Endoscope device, control device, method for operating endoscope device, and program |
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| JPH08313823A (en) * | 1995-05-15 | 1996-11-29 | Olympus Optical Co Ltd | Endoscopic image processing device |
| JP3890634B2 (en) * | 1995-09-19 | 2007-03-07 | セイコーエプソン株式会社 | Piezoelectric thin film element and ink jet recording head |
| CA2318180A1 (en) * | 1998-01-26 | 1999-07-29 | Massachusetts Institute Of Technology | Fluorescence imaging endoscope |
| JP4409166B2 (en) * | 2002-12-05 | 2010-02-03 | オリンパス株式会社 | Image processing device |
| US7627189B2 (en) * | 2004-10-20 | 2009-12-01 | Fujinon Corporation | Sharpness adjustment method and program and electronic endoscope apparatus |
| US7323946B2 (en) * | 2005-10-20 | 2008-01-29 | Honeywell International Inc. | Lock detect circuit for a phase locked loop |
| JP5057675B2 (en) * | 2006-03-03 | 2012-10-24 | オリンパスメディカルシステムズ株式会社 | Living body observation device |
| JP4391998B2 (en) * | 2006-03-07 | 2009-12-24 | オリンパス株式会社 | Endoscope device |
| KR101050874B1 (en) * | 2006-04-12 | 2011-07-20 | 올림푸스 메디칼 시스템즈 가부시키가이샤 | Endoscope device |
| JP2010075368A (en) * | 2008-09-25 | 2010-04-08 | Fujifilm Corp | Apparatus, method, and program of electronic endoscope |
| JP5422180B2 (en) * | 2008-11-21 | 2014-02-19 | 富士フイルム株式会社 | Endoscope apparatus and method of operating the same |
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