CN103929560A

CN103929560A - Image obtaining method and device

Info

Publication number: CN103929560A
Application number: CN201410158174.0A
Authority: CN
Inventors: 张文波; 戴朋飞; 从红霞
Original assignee: Weihai Hualing Opto Electronics Co Ltd
Current assignee: Weihai Hualing Opto Electronics Co Ltd
Priority date: 2014-04-18
Filing date: 2014-04-18
Publication date: 2014-07-16
Anticipated expiration: 2034-04-18
Also published as: CN103929560B

Abstract

The invention discloses an image obtaining method and device. The method includes the steps that all irradiation targets in a plurality of light sources are used in sequence, the light sources include the ultraviolet light source and one or more other light sources, and the irradiation period corresponding to the ultraviolet source is larger than the irradiation period corresponding to at least one of other light sources; when each irradiation target in the light sources is used, a target image corresponding to each light source is obtained. According to the image obtaining method and device, the technical problem that the definition of ultraviolet images output by an existing multifunctional integral machine is solved, and the technical effect of improving the definition of the ultraviolet images is achieved.

Description

Image acquiring method and device

Technical field

The present invention relates to image sensing area, in particular to a kind of image acquiring method and device.

Background technology

In the prior art, scanner can be for treating the scanning of scanning paper, cash inspecting machine can be for treating the inspection of currency examine ticket, wherein, for the two, it can be similar for obtaining the parts of target image separately, all can adopt the transducer that can identify visible ray, such as silicon photocell etc., the difference of the two is embodied in the difference of the type of the light irradiating to object more, therefore, a kind of feasible scheme that the two is united two into one is to utilize same set of image capture device to obtain target image, and in the time obtaining target image, irradiate object with multiple different light sources successively, so that obtain and multiple light sources multiple target images one to one.

In prior art, there is the all-in-one multifunctional machine that adopts this solution, can be in the time gathering image, use successively multiple different light sources to irradiate object, and gather respectively the target image corresponding with each light source, and then can choose the target image that the one or more light sources corresponding with the material of object and default scan mode thereof are corresponding, and can export or process further the target image that selects, thereby guarantee all-in-one multifunctional machine to unlike material and be provided with being extensively suitable for of object of different default scan modes.

Particularly, the consideration designing for the driving of simplifying light source and transducer, at present, the mode that all-in-one multifunctional machine generally adopts is, for the dissimilar light that multiple light sources send separately, be set the identical scan period, for multiple light sources, identical exposure period is set in other words conj.or perhaps, thereby the switching of light source and transducer can be completed based on this exposure period in the lump reading of target image under Different Light.For example, Fig. 1 shows a kind of feasible scan mode, wherein, and T ₁, T ₂, T ₃, T ₄and T ₅can represent corresponding with red-light source, green-light source, blue light source, infrared light supply and ultraviolet source respectively exposure period, wherein, the 1st to 5 row waveforms in Fig. 1 can represent above-mentioned each light source sequential logic of corresponding driving signal respectively.As can be seen from Figure 1, under above-mentioned scene, the working method of all-in-one multifunctional machine is to use successively red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object, and the image that obtains respectively the object under each light source irradiation is as the target image corresponding with each light source, wherein, each light source all has identical exposure period.More specifically, if the target image that above-mentioned scan operation is obtained is row's pixel, the analog quantity of the gray scale of each pixel that transducer is exported in above-mentioned scan operation can be as shown in Figure 2, wherein, curve 202,204,206,208 and 210 can represent respectively the output of transducer in the time of red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object.

But for traditional touch sensor, on the one hand, it can normally obtain conventionally red, green, the blue image that waits the object under visible light source irradiation, and the brightness of these target images corresponding with visible light source and readability are generally comparatively desirable, on the other hand, because the brightness of ultraviolet source is conventionally on the low side, make exciting light that object produces after UV-irradiation also relatively a little less than, thereby the target image corresponding with ultraviolet source that causes transducer to obtain, the overall brightness of ultraviolet image and readability all have deficiency in other words.For example, the output of transducer in the time of red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object can be respectively as shown in the curve 202,204,206,208 and 210 in Fig. 2, wherein, the output of transducer when ultraviolet source irradiation can be starkly lower than the output of the transducer of other light sources while irradiating.Further, this output corresponding with ultraviolet source can be amplified as shown in Figure 3.

Under above-mentioned scene, for improving the identification of ultraviolet image, conventionally can the signal corresponding with ultraviolet image of the output of transducer be amplified and be proofreaied and correct, and then output brightness comparatively meets the ultraviolet image of human eye observation or machine detection.But in the amplification and trimming process of signal, the interference in the output signal of transducer also will be exaggerated, thereby cause the ultraviolet image of output cannot reach as the readability of the target image corresponding with visible ray.For example, in curve of output 210 as shown in Figure 3, it is more obvious that the composition of interference will seem, and for the restriction of the minimum resolution of transducer, for the less output signal of intensity, its accuracy also can be affected.For this problem, effective solution is not yet proposed at present.

Summary of the invention

The embodiment of the present invention provides a kind of image acquiring method and device, at least to solve the lower technical problem of readability of the ultraviolet image that existing all-in-one multifunctional machine exported.

According to the embodiment of the present invention aspect, a kind of image acquiring method is provided, comprise: use successively each the irradiation object in multiple light sources, above-mentioned multiple light source comprises ultraviolet source and one or more other light sources, wherein, the exposure period that above-mentioned ultraviolet source is corresponding is greater than at least one the corresponding exposure period in above-mentioned other light sources; When stating in the use each in multiple light sources and irradiating above-mentioned object, obtain the target image corresponding with above-mentioned each light source.

Preferably, above-mentionedly use successively each in multiple light sources to irradiate object to comprise: repeat N following operation: in the time, light current light source presetting to light, and use above-mentioned current light source to irradiate above-mentioned object; Within the default fall time, extinguish above-mentioned current light source, above-mentioned exposure period comprises above-mentioned default lighting time and above-mentioned default fall time; Default light time and above-mentioned default fall time and switch to next light source after all finishing above-mentioned, and using above-mentioned next light source the current light source in next operation; Wherein, N represents the sum of above-mentioned multiple light sources.

Preferably, above-mentioned other light sources comprise following one of at least: red-light source, green-light source, blue light source, white light source, infrared light supply.

Preferably, above-mentioned obtain the target image corresponding with above-mentioned each light source after, said method also comprises: according to coloured light correction parameter, ultraviolet image is proofreaied and correct, above-mentioned ultraviolet image represents the target image corresponding with above-mentioned ultraviolet source, wherein, above-mentioned coloured light correction parameter generates according to benchmark image, the image of the said reference thing that said reference image representation obtains while stating in the use the one or more coloured light light sources irradiation primary standard substance in other light sources; Ultraviolet image after output calibration.

Preferably, above-mentioned according to coloured light correction parameter, above-mentioned ultraviolet image is proofreaied and correct before, said method also comprises: in the time using coloured light light source to irradiate said reference thing, obtain ruddiness display parameters, green glow display parameters and the blue light display parameters of the first pixel in said reference image; Generate the ruddiness augmenting factor corresponding with above-mentioned the first pixel according to above-mentioned ruddiness display parameters, generate the green glow augmenting factor corresponding with above-mentioned the first pixel according to above-mentioned green glow display parameters, and generate the blue light augmenting factor corresponding with above-mentioned the first pixel according to above-mentioned blue light display parameters, wherein, above-mentioned coloured light correction parameter comprises above-mentioned ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor.

Preferably, above-mentioned coloured light light source comprises white light source, wherein, above-mentioned ruddiness display parameters, green glow display parameters and the blue light display parameters that obtain the first pixel in said reference image comprise: while stating in the use white light source irradiation said reference thing, using the display parameters of ruddiness sub-pixel point as above-mentioned ruddiness display parameters, using the display parameters of green glow sub-pixel point as above-mentioned green glow display parameters, using the display parameters of blue photons pixel as above-mentioned blue light display parameters; Wherein, above-mentioned the first pixel comprises above-mentioned ruddiness sub-pixel point, green glow sub-pixel point and blue photons pixel, above-mentioned ruddiness sub-pixel point is corresponding with the ruddiness unthreaded hole in the corresponding imaging optical path of above-mentioned the first pixel, above-mentioned green glow sub-pixel point is corresponding with the green glow unthreaded hole in above-mentioned imaging optical path, and above-mentioned blue photons pixel is corresponding with the blue light unthreaded hole in above-mentioned imaging optical path.

Preferably, above-mentioned coloured light light source comprises red-light source, green-light source and blue light source, wherein, above-mentioned ruddiness display parameters, green glow display parameters and the blue light display parameters that obtain the first pixel in said reference image comprise: use respectively above-mentioned red-light source, above-mentioned green-light source and above-mentioned blue light source to irradiate said reference thing, and obtain corresponding ruddiness benchmark image, green glow benchmark image and blue light benchmark image; Using the display parameters of pixel corresponding in above-mentioned ruddiness benchmark image as above-mentioned ruddiness display parameters, using the display parameters of pixel corresponding in above-mentioned green glow benchmark image as above-mentioned green glow display parameters, and using the display parameters of pixel corresponding in above-mentioned blue light benchmark image as above-mentioned blue light display parameters.

Preferably, above-mentionedly according to coloured light correction parameter, above-mentioned ultraviolet image is proofreaied and correct and comprised: the ruddiness of proofreading and correct the second pixel according to above-mentioned ruddiness augmenting factor shows component, the green glow of proofreading and correct the second pixel according to above-mentioned green glow augmenting factor shows component, and according to above-mentioned blue light augmenting factor proofread and correct the second pixel blue light show component, above-mentioned the second pixel represents the pixel corresponding with above-mentioned the first pixel in above-mentioned ultraviolet image.

According to the embodiment of the present invention on the other hand, a kind of image acquiring device is also provided, comprise: illumination unit, for using successively each irradiation object of multiple light sources, above-mentioned multiple light source comprises ultraviolet source and one or more other light sources, wherein, the exposure period that above-mentioned ultraviolet source is corresponding is greater than at least one the corresponding exposure period in above-mentioned other light sources; The first acquiring unit, while irradiating above-mentioned object, obtains the target image corresponding with above-mentioned each light source for each that state in the use multiple light sources.

Preferably, above-mentioned illumination unit comprises: irradiation module, for repeating N following operation: light current light source in the time default lighting, and use above-mentioned current light source to irradiate above-mentioned object; Within the default fall time, extinguish above-mentioned current light source, above-mentioned exposure period comprises above-mentioned default lighting time and above-mentioned default fall time; Default light time and above-mentioned default fall time and switch to next light source after all finishing above-mentioned, and using above-mentioned next light source the current light source in next operation; Wherein, N represents the sum of above-mentioned multiple light sources.

Preferably, said apparatus also comprises: correcting unit, for ultraviolet image being proofreaied and correct according to coloured light correction parameter, above-mentioned ultraviolet image represents the target image corresponding with above-mentioned ultraviolet source, wherein, above-mentioned coloured light correction parameter generates according to benchmark image, the image of the said reference thing that said reference image representation obtains while stating in the use the one or more coloured light light sources irradiation primary standard substance in other light sources; Output unit, for the ultraviolet image after output calibration.

Preferably, said apparatus also comprises: second acquisition unit, in the time using coloured light light source to irradiate said reference thing, obtains ruddiness display parameters, green glow display parameters and the blue light display parameters of the first pixel in said reference image; Generation unit, for generating the ruddiness augmenting factor corresponding with above-mentioned the first pixel according to above-mentioned ruddiness display parameters, generate the green glow augmenting factor corresponding with above-mentioned the first pixel according to above-mentioned green glow display parameters, and generate the blue light augmenting factor corresponding with above-mentioned the first pixel according to above-mentioned blue light display parameters, wherein, above-mentioned coloured light correction parameter comprises above-mentioned ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor.

Preferably, above-mentioned coloured light light source comprises white light source, wherein, above-mentioned second acquisition unit comprises: the first acquisition module, while irradiating said reference thing for stating in the use white light source, using the display parameters of ruddiness sub-pixel point as above-mentioned ruddiness display parameters, using the display parameters of green glow sub-pixel point as above-mentioned green glow display parameters, using the display parameters of blue photons pixel as above-mentioned blue light display parameters; Wherein, above-mentioned the first pixel comprises above-mentioned ruddiness sub-pixel point, green glow sub-pixel point and blue photons pixel, above-mentioned ruddiness sub-pixel point is corresponding with the ruddiness unthreaded hole in the corresponding imaging optical path of above-mentioned the first pixel, above-mentioned green glow sub-pixel point is corresponding with the green glow unthreaded hole in above-mentioned imaging optical path, and above-mentioned blue photons pixel is corresponding with the blue light unthreaded hole in above-mentioned imaging optical path.

Preferably, above-mentioned coloured light light source comprises red-light source, green-light source and blue light source, wherein, above-mentioned second acquisition unit comprises: irradiation module, for using respectively above-mentioned red-light source, above-mentioned green-light source and above-mentioned blue light source to irradiate said reference thing, and obtain corresponding ruddiness benchmark image, green glow benchmark image and blue light benchmark image; The second acquisition module, be used for using the display parameters of pixel corresponding above-mentioned ruddiness benchmark image as above-mentioned ruddiness display parameters, using the display parameters of pixel corresponding in above-mentioned green glow benchmark image as above-mentioned green glow display parameters, and using the display parameters of pixel corresponding in above-mentioned blue light benchmark image as above-mentioned blue light display parameters.

Preferably, above-mentioned correcting unit comprises: correction module, show component for the ruddiness of proofreading and correct the second pixel according to above-mentioned ruddiness augmenting factor, the green glow of proofreading and correct the second pixel according to above-mentioned green glow augmenting factor shows component, and according to above-mentioned blue light augmenting factor proofread and correct the second pixel blue light show component, above-mentioned the second pixel represents the pixel corresponding with above-mentioned the first pixel in above-mentioned ultraviolet image.

In embodiments of the present invention, adopt the mode that extends the exposure period of ultraviolet source, make transducer can be in the time of ultraviolet source irradiation output intensity and the higher signal of identification, so that improve the readability of the ultraviolet image exported of all-in-one multifunctional machine, and then solve the lower technical problem of readability of the ultraviolet image that existing all-in-one multifunctional machine exports.

Brief description of the drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is according to the schematic diagram of a kind of scan mode of prior art;

Fig. 2 is the schematic diagram of the signal exported respectively in the time that multiple Different Light are irradiated object according to transducer in a kind of scan mode of prior art;

Fig. 3 is the schematic diagram of the signal exported when the ultraviolet source irradiation object according to transducer in a kind of scan mode of prior art;

Fig. 4 is according to the schematic diagram of a kind of optional image acquiring method of the embodiment of the present invention;

Fig. 5 is according to the schematic diagram of a kind of optional image acquiring method of the embodiment of the present invention;

Fig. 6 is the schematic diagram of the signal exported respectively in the time that multiple Different Light are irradiated object according to transducer in a kind of optional image acquiring method of the embodiment of the present invention;

Fig. 7 is the schematic diagram of the signal exported when the ultraviolet source irradiation object according to transducer in a kind of optional image acquiring method of the embodiment of the present invention;

Fig. 8 is according to the schematic diagram of the optional image acquiring method of another kind of the embodiment of the present invention.

Fig. 9 is according to the schematic diagram of a kind of optional image acquiring device of the embodiment of the present invention.

Embodiment

Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.

Embodiment 1

According to the embodiment of the present invention, a kind of image acquiring method is provided, as shown in Figure 4, the method comprises:

S402: use successively each the irradiation object in multiple light sources, multiple light sources comprise ultraviolet source and one or more other light sources, and wherein, the exposure period that ultraviolet source is corresponding is greater than at least one the corresponding exposure period in other light sources;

S404: in the time of each the irradiation object using in multiple light sources, obtain the target image corresponding with each light source.

It will be clear that one of technical solution of the present invention problem to be solved is to provide a kind of method, to realize obtaining target image.Wherein, for by closely or for the target image that obtains of contact-type image sensor, this target image obtain normally the mode of irradiating object, then gathering the image of irradiated this object that adopts, thereby in embodiments of the present invention, by step S404, the image that can obtain object in the time using target illuminated thing, this image obtaining can be designated as target image.

In embodiments of the present invention, can have multiplely for irradiating the light source of object, and also can have the different forms of expression from the object of Different Light coupling.For example, for scanner, can be white light source for irradiating as the light of the paper to be scanned of object, the combination of the red-light source of equality strength, green-light source and blue light source in other words, and corresponding paper to be scanned can be with the writing or copying paper of common ink writing with it, thereby the writing that the target image of this paper to be scanned obtaining under white light can have in comparatively suitable brightness and target image also can have good contrast.On the other hand, for cash inspecting machine, can be the ultraviolet light that wavelength is positioned at the ultraviolet light wave band of 200nm to 400nm for irradiating as the light of the banknote to be tested of object, the common ultraviolet light that is 365nm as wavelength, and on the banknote to be tested of correspondence, can there is photographic composition with it, such as using the fluorescent characters of colorless fluorescent ink printing, or common fluorescent component residual after bleaching etc. in counterfeit money, these photographic compositions can be excited and send wavelength and be positioned at the fluorescence of visible light wave range under the irradiation of ultraviolet light, thereby in the target image of this banknote to be tested obtaining under UV-irradiation, can present with natural light irradiation under this banknote to be tested difference figure, so that the identification to the banknote to be tested true and false.

Known based on above description, in the prior art, scanner can be for treating the scanning of scanning paper, cash inspecting machine can be for treating the inspection of currency examine ticket, wherein, for the two, it can be similar for obtaining the parts of target image separately, all can adopt the transducer that can identify visible ray, such as silicon photocell etc., the difference of the two is embodied in the difference of the type of the light irradiating to object more, therefore, a kind of feasible scheme that the two is united two into one is to utilize same set of image capture device to obtain target image, and in the time obtaining target image, irradiate object with multiple different light sources successively, so that obtain and multiple light sources multiple target images one to one.

Particularly, the consideration designing for the driving of simplifying light source and transducer, at present, the mode that all-in-one multifunctional machine generally adopts is, for the dissimilar light that multiple light sources send separately, be set the identical scan period, for multiple light sources, identical exposure period is set in other words conj.or perhaps, thereby the switching of light source and transducer can be completed based on this exposure period in the lump reading of target image under Different Light.For example, Fig. 1 shows a kind of feasible scan mode, wherein, and T ₁, T ₂, T ₃, T ₄and T ₅can represent corresponding with red-light source, green-light source, blue light source, infrared light supply and ultraviolet source respectively exposure period, thereby the 1st to 5 row waveforms in Fig. 1 can represent above-mentioned each light source sequential logic of corresponding driving signal respectively.As can be seen from Figure 1, under above-mentioned scene, the working method of all-in-one multifunctional machine is to use successively red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object, and the image that obtains respectively the object under each light source irradiation is as the target image corresponding with each light source, wherein, each light source all has identical exposure period.More specifically, if the target image that above-mentioned scan operation is obtained is row's pixel, the analog quantity of the gray scale of each pixel that transducer is exported in above-mentioned scan operation can be as shown in Figure 2, wherein, curve 202,204,206,208 and 210 can represent respectively the output of transducer in the time of red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object.

But for traditional touch sensor, on the one hand, it can normally obtain conventionally red, green, the blue image that waits the object under visible light source irradiation, and the brightness of these target images corresponding with visible light source and readability are generally comparatively desirable, on the other hand, because the brightness of ultraviolet source is conventionally on the low side, make exciting light that object produces after UV-irradiation also relatively a little less than, thereby the target image corresponding with ultraviolet source that causes transducer to obtain, the overall brightness of ultraviolet image and readability all have deficiency in other words.For example, the output of transducer in the time of red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object can be respectively as shown in the curve 202,204,206,208 and 210 in Fig. 2, wherein, the output of transducer when ultraviolet source irradiation can be starkly lower than the output of the transducer of other light sources while irradiating.

Under above-mentioned scene, for improving the identification of ultraviolet image, conventionally can amplify the signal corresponding with ultraviolet image of the output of transducer, and then output brightness comparatively meets the ultraviolet image of human eye observation or machine detection.But, in the amplification process of signal, interference in the output signal of transducer also will be exaggerated, thereby cause the ultraviolet image of output cannot reach as the readability of the target image corresponding with visible ray, and for the restriction of the minimum resolution of transducer, for the less output signal of intensity, its accuracy also can be affected.

For addressing the above problem, in embodiments of the present invention, adopt the mode that extends the exposure period of ultraviolet source, make transducer can be in the time of ultraviolet source irradiation output intensity and the higher signal of identification, so that improve the readability of the ultraviolet image exported of all-in-one multifunctional machine, and then solve the lower technical problem of readability of the ultraviolet image that existing all-in-one multifunctional machine exports.

Below with reference to accompanying drawing and specific embodiment, technical solution of the present invention and principle thereof are made a more detailed description.

The image acquiring method providing according to the embodiment of the present invention, in step S402, can use each the irradiation object in multiple light sources successively.Particularly, the plurality of light source can comprise ultraviolet source and one or more other light sources, and wherein, the exposure period that this ultraviolet source is corresponding is greater than at least one the corresponding exposure period in this other light sources.

Be similar to prior art, in embodiments of the present invention, can be successively irradiate object with the visible light sources such as red-light source, green-light source and blue light source and infrared light supply and ultraviolet source, as paper or banknote etc., and then obtain based on this target image of object.But unlike the prior art, in embodiments of the present invention, in the time using successively each in above-mentioned multiple light source to irradiate this object, the exposure period set for each light source is no longer identical, specifically, at least the exposure period of ultraviolet source can be set to be greater than the exposure period of other light sources.Under above-mentioned scene, because the IMAQ cycle of the exposure period of ultraviolet source and the transducer of correspondence thereof increases, therefore the signal that transducer is exported in the time of ultraviolet source irradiation also will be enhanced, and this output signal also can gradually be stablized with accurate, this has just improved the identification of output signal, so that the readability of ultraviolet image can reach the readability that is comparable to the target image corresponding with visible light source, thereby make to adopt the all-in-one multifunctional machine of this scheme can export ultraviolet image comparatively clearly.

For example, in one embodiment, the scan mode that all-in-one multifunctional machine adopts can be as shown in Figure 5, wherein, and T ₁, T ₂, T ₃, T ₄and T ₅can represent corresponding with red-light source, green-light source, blue light source, infrared light supply and ultraviolet source respectively exposure period, thereby the 1st to 5 row waveforms in Fig. 5 can represent above-mentioned each light source sequential logic of corresponding driving signal respectively.As can be seen from Figure 5, under above-mentioned scene, the working method of all-in-one multifunctional machine is to use successively red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object, and the image that obtains respectively the object under each light source irradiation is as the target image corresponding with each light source, wherein, red-light source, green-light source, blue light source and infrared light supply can have identical exposure period, and ultraviolet source has longer exposure period relatively.

Under above-mentioned scene, if the target image that above-mentioned scan operation is obtained is row's pixel, the analog quantity of the gray scale of each pixel that transducer is exported in above-mentioned scan operation can be as shown in Figure 6, wherein, curve 602,604,606,608 and 610 can represent respectively the output of transducer in the time of red-light source, green-light source, blue light source, infrared light supply and ultraviolet source irradiation object.As can be seen from Figure 6, after the prolongation exposure period of ultraviolet source extends, the output of transducer in the time that multiple light sources irradiate object reaches relatively consistent level, and this just makes to disturb and the level of amplifying the factors such as processings and reach corresponding respectively to the target image of Different Light relative equalization.Further, the output of transducer in the time of ultraviolet source irradiation object can be specifically as shown in Figure 7, contrast as seen with Fig. 3, the intensity of the curve of output 610 in Fig. 7 and identification are all better than the curve of output 210 shown in Fig. 3, and are not relatively vulnerable to the restriction of the minimum resolution of transducer.

Pass through above-described embodiment, technical solution of the present invention and principle thereof are set forth, but it should be noted that, above-described embodiment is only for the understanding to technical solution of the present invention, can't form unnecessary restriction to the present invention, the application of the present invention to visible ray and ultraviolet light for example proposed in the above-described embodiments, but in some embodiments of the invention, similarly scheme also can be applied to infrared light, and the radiation modality of light source also can and not only be confined to head-on irradiate, such as also adopting the mode of backlight illumination or transmission, in addition, the light that above-mentioned light source sends can be both divergence expression, also be the luminous form of common point-source of light, also can there is directive property, such as the coloured light being sent by LASER Light Source, etc., the present invention is not all limited in any way this.Should be appreciated that above-mentioned numerous embodiments and equivalence or modification based on technical solution of the present invention, all should be considered as within protection scope of the present invention.

In addition, in embodiments of the present invention, the above-mentioned execution mode processing mode feasible with other can also be combined, for example, in some embodiments of the invention, can repeatedly obtain the operation of target image, and according to the equalization result of multiple target images that multi-pass operation is obtained, such as the mean value of the gray scale of same pixel in multiple target images, be used as the basis of the target image of all-in-one multifunctional machine output etc., the present invention is not construed as limiting this.Should be appreciated that above-mentioned to the expansion of technical solution of the present invention with extend must be considered as within protection scope of the present invention.

More specifically, in embodiments of the present invention, the concrete radiation modality to object described in above-mentioned steps S402 can have multiple, below provides a kind of optional mode as a reference, and wherein, step S402 can comprise:

Repeat N following operation:

S2, in the time, light current light source default lighting, and use current light source to irradiate object; Within the default fall time, extinguish current light source, exposure period comprises default lighting time and default fall time; Light time and default fall time and switch to next light source after all finishing default, and using next light source the current light source in next operation;

Wherein, N represents the sum of multiple light sources.

For example, in one embodiment, the scan mode that all-in-one multifunctional machine specifically adopts can be as shown in Figure 8, wherein, and T ₁, T ₂, T ₃, T ₄and T ₅can represent corresponding with red-light source, green-light source, blue light source, infrared light supply and ultraviolet source respectively exposure period, t ₁, t ₂, t ₃, t ₄and t ₅can represent corresponding with red-light source, green-light source, blue light source, infrared light supply and ultraviolet source respectively default lighting the time, thereby the 1st to 5 row waveforms in Fig. 8 can represent above-mentioned each light source sequential logic of corresponding driving signal respectively.

Under above-mentioned scene, exposure period can be the longest time of lighting for each light source setting, and in practical operation, the concrete time of lighting of each light source can with the default time consistency of lighting.By this mode, can be convenient to user or attendant adjust each light source concrete lighting the time according to the service condition of the each light source in this all-in-one multifunctional machine, if while producing luminous decay such as red-light source wherein due to the factor such as aging, can correspondingly increase the default of red-light source and light the time etc., thereby further for user and attendant offer convenience.

On basis described above, in embodiments of the present invention, can also proofread and correct the ultraviolet image tentatively obtaining further, and ultraviolet image after output calibration, so that get rid of as much as possible disturbing factor, and optimized image quality.For example, as a kind of comparatively basic correcting mode, can be respectively to image carry out visible subsidy just with invisible subsidy just, invisible subsidy just can utilize the difference between the positive image of ultraviolet image to be corrected and invisible subsidy to complete, the image of the object obtaining under the state that the positive image representation transducer of this invisible subsidy extinguishes at light source, so that eliminate the impact of disturbing.The display parameters of the pixel of the ultraviolet image after visible subsidy just can utilize the visible subsidy positive coefficient obtaining in advance to invisible subsidy just carry out ratio adjusting, wherein, visible subsidy positive coefficient can obtain based on the positive benchmark image of visible subsidy conventionally, the image of the primary standard substance that the positive benchmark image representation of this visible subsidy transducer obtains in the time of ultraviolet source irradiation primary standard substance, so that abatement apparatus from the defect in imaging, makes the image after correction more true.

Under above-mentioned scene, for only needing black and white ultraviolet image, also the ultraviolet image only presenting with the black and white gray scale of pixel, normally enough, but for colored ultraviolet image, also the ultraviolet image presenting with the RGB component of pixel, the reverberation inspiring be mapped to the primary standard substances such as white reference specimen page during due to ultraviolet lighting a little less than, and the ultraviolet induction original copy that is difficult to obtain being suitable for carrying out the correction of red, green, blue three primary colors, therefore simple correcting mode will seem not accurate enough.

For addressing this problem, in embodiments of the present invention, take the mode of utilizing coloured light correction parameter to proofread and correct ultraviolet image, this coloured light correction parameter does not use ultraviolet source irradiation primary standard substance to obtain, but use ruddiness, green glow, blue light, white light isochrome irradiation primary standard substance obtains, because the imaging system of all-in-one multifunctional machine shares, therefore this coloured light correction parameter still can reflect the defect that imaging system itself exists comparatively all sidedly, and then it is also relatively accurate to utilize coloured light correction parameter to proofread and correct drawn result to ultraviolet image, and generation is better than using the effect of ultraviolet light correction parameter.

Particularly, in embodiments of the present invention, above-mentioned image acquiring method can also comprise:

S4: ultraviolet image is proofreaied and correct according to coloured light correction parameter, ultraviolet image represents the target image corresponding with ultraviolet source, wherein, coloured light correction parameter generates according to benchmark image, and benchmark image is illustrated in the image of the primary standard substance obtaining when the one or more coloured light light sources that use in other light sources irradiate primary standard substance;

S6: the ultraviolet image after output calibration.

Further alternatively, in embodiments of the present invention, before step S4, above-mentioned image acquiring method can also comprise:

S8: in the time using coloured light light source to irradiate primary standard substance, obtain ruddiness display parameters, green glow display parameters and the blue light display parameters of the first pixel in benchmark image;

S10: generate the ruddiness augmenting factor corresponding with the first pixel according to ruddiness display parameters, generate the green glow augmenting factor corresponding with the first pixel according to green glow display parameters, and generate the blue light augmenting factor corresponding with the first pixel according to blue light display parameters, wherein, coloured light correction parameter comprises ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor.

Particularly, in embodiments of the present invention, above-mentioned display parameters can be brightness value or gray value etc., such as, in the benchmark image obtaining under red light irradiation, if one of the gray value of two pixels is higher, one on the low side, it can be the larger ruddiness augmenting factor of the higher pixel setting of gray value, and the ruddiness augmenting factor that the pixel setting that gray value is on the low side is less, similarly, can also be that pixel arranges green glow augmenting factor and blue light augmenting factor according to the benchmark image corresponding with green glow and blue light, the present invention be not construed as limiting this.

By the way, just just can complete the correction to ultraviolet image, especially visible subsidy.In general, for ultraviolet image each pixel in the acquisition window of transducer in other words, all can a corresponding ruddiness augmenting factor, a green glow augmenting factor and a blue light augmenting factor, thereby proofreading and correct in processing and can proofread and correct for the display parameters of each pixel in ultraviolet image.Specifically, above-mentioned steps S4 can comprise:

S12: the ruddiness of proofreading and correct the second pixel according to ruddiness augmenting factor shows component, the green glow of proofreading and correct the second pixel according to green glow augmenting factor shows component, and according to blue light augmenting factor proofread and correct the second pixel blue light show component, the second pixel represents the pixel corresponding with the first pixel in ultraviolet image.

Wherein, the ruddiness of the second pixel in ultraviolet image to be corrected shows that component, green glow show that component and blue light show that component normally shows with ruddiness display parameters, green glow display parameters and the blue light of above-mentioned the first pixel in benchmark image the parameter that component type is identical, for example, in some embodiments of the invention, this ruddiness shows that component, green glow show that component and blue light show that component can represent respectively R, G, the B value of pixel, is also ruddiness gray value, green glow gray value and blue light gray value.In other words, in embodiments of the present invention, can generate ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor according to the rgb value of the first pixel in advance, and then in actual scanning process, can utilize these augmenting factors respectively the rgb value of the second pixel in ultraviolet image to be maked corrections, thereby complete the correction to ultraviolet image.

It should be noted that, in embodiments of the present invention, " first ", " second ", Deng the differentiation being only used in statement, not in the time to each statement object, space, restriction in the relativeness such as order or significance level, for example, the first pixel can be only for representing a pixel of benchmark image, the second pixel can be only for representing a pixel of ultraviolet image, this first pixel and the second pixel should not be understood as the sequence to the pixel in arbitrary image, also not answering Conditions of Deliberate Misinterpretation is to be " first " pixel or " second " pixel etc. of arranging by a certain mode in arbitrary image, specifically, the present invention is not limited in any way for the particular location of this first pixel and the second pixel.

More specifically, as the optional mode of one, in embodiments of the present invention, above-mentioned coloured light light source can comprise white light source, and wherein, step S8 can comprise:

S14: in the time using white light source to irradiate primary standard substance, using the display parameters of ruddiness sub-pixel point as ruddiness display parameters, using the display parameters of green glow sub-pixel point as green glow display parameters, using the display parameters of blue photons pixel as blue light display parameters; Wherein,

The first pixel comprises ruddiness sub-pixel point, green glow sub-pixel point and blue photons pixel, ruddiness sub-pixel point is corresponding with the ruddiness unthreaded hole in the corresponding imaging optical path of the first pixel, green glow sub-pixel point is corresponding with the green glow unthreaded hole in imaging optical path, and blue photons pixel is corresponding with the blue light unthreaded hole in imaging optical path.

In the present embodiment, ruddiness unthreaded hole, green glow unthreaded hole and blue light unthreaded hole can represent the unthreaded hole that allows respectively ruddiness, green glow and blue light to pass through.Each pixel all can a corresponding ruddiness unthreaded hole, a blue light unthreaded hole and a green glow unthreaded hole, and then white light source sends and the light that reflected by primary standard substance is imaged on sensor chip by these three unthreaded holes respectively, form respectively ruddiness sub-pixel point, green glow sub-pixel point and blue photons pixel, thereby can determine ruddiness correction coefficient, green glow correction coefficient and blue light correction coefficient according to the display parameters of these three sub-pixels.

As the optional mode of another kind, in embodiments of the present invention, coloured light light source also can comprise red-light source, green-light source and blue light source, and wherein, step S8 can comprise:

S16: use respectively red-light source, green-light source and blue light source to irradiate primary standard substance, and obtain corresponding ruddiness benchmark image, green glow benchmark image and blue light benchmark image;

S18: using the display parameters of pixel corresponding in ruddiness benchmark image as ruddiness display parameters, using the display parameters of pixel corresponding in green glow benchmark image as green glow display parameters, and using the display parameters of pixel corresponding in blue light benchmark image as blue light display parameters.

Be different from the division on the space adopting in last mode, in the present embodiment, adopt temporal division, also adopt operation performed while being similar to actual scanning, in turn use red-light source, green-light source and blue light source to irradiate primary standard substance, and obtain respectively corresponding benchmark image, and then obtain respectively ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor according to the display parameters of the pixel in ruddiness benchmark image, green glow benchmark image and blue light benchmark image respectively.This does not affect the enforcement of technical solution of the present invention and the realization of technique effect thereof, and similarly, the equivalence to the embodiment of the present invention or the execution mode of modification also all should be considered as within protection scope of the present invention.

The invention provides a kind of preferred embodiment and come further the present invention to be made an explanation, but it should be noted that the preferred embodiment, just in order better to describe the present invention, does not form the present invention is limited improperly.

Embodiment 2

According to the embodiment of the present invention, also provide a kind of for implementing the image acquiring device of above-mentioned image acquiring method, as shown in Figure 9, this device comprises:

1) illumination unit 902, for using successively each irradiation object of multiple light sources, multiple light sources comprise ultraviolet source and one or more other light sources, and wherein, the exposure period that ultraviolet source is corresponding is greater than at least one the corresponding exposure period in other light sources;

2) the first acquiring unit 904, in the time using each irradiation object of multiple light sources, obtains the target image corresponding with each light source.

It will be clear that one of technical solution of the present invention problem to be solved is to provide a kind of device, to realize obtaining target image.Wherein, for by closely or for the target image that obtains of contact-type image sensor, this target image obtain normally the mode of irradiating object, then gathering the image of irradiated this object that adopts, thereby in embodiments of the present invention, by the first acquiring unit 904, the image that can obtain object in the time using target illuminated thing, this image obtaining can be designated as target image.

The image acquiring device providing according to the embodiment of the present invention, by illumination unit 902, can use each the irradiation object in multiple light sources successively.Particularly, the plurality of light source can comprise ultraviolet source and one or more other light sources, and wherein, the exposure period that this ultraviolet source is corresponding is greater than at least one the corresponding exposure period in this other light sources.

More specifically, in embodiments of the present invention, the concrete radiation modality to object described in illumination unit 902 can have multiple, below provides a kind of optional mode as a reference, and wherein, illumination unit 902 can comprise:

1) irradiation module, for repeating N following operation: light current light source in the time default lighting, and use current light source to irradiate object; Within the default fall time, extinguish current light source, exposure period comprises default lighting time and default fall time; Light time and default fall time and switch to next light source after all finishing default, and using next light source the current light source in next operation;

Wherein, N represents the sum of multiple light sources.

Particularly, in embodiments of the present invention, above-mentioned image acquiring device can also comprise:

1) correcting unit, for ultraviolet image being proofreaied and correct according to coloured light correction parameter, ultraviolet image represents the target image corresponding with ultraviolet source, wherein, coloured light correction parameter generates according to benchmark image, and benchmark image is illustrated in the image of the primary standard substance obtaining when the one or more coloured light light sources that use in other light sources irradiate primary standard substance;

2) output unit, for the ultraviolet image after output calibration.

Further alternatively, in embodiments of the present invention, with correcting unit coupling ground, above-mentioned image acquiring device can also comprise:

1) second acquisition unit, in the time using coloured light light source to irradiate primary standard substance, obtains ruddiness display parameters, green glow display parameters and the blue light display parameters of the first pixel in benchmark image;

2) generation unit, for generating the ruddiness augmenting factor corresponding with the first pixel according to ruddiness display parameters, generate the green glow augmenting factor corresponding with the first pixel according to green glow display parameters, and generate the blue light augmenting factor corresponding with the first pixel according to blue light display parameters, wherein, coloured light correction parameter comprises ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor.

By the way, just just can complete the correction to ultraviolet image, especially visible subsidy.In general, for ultraviolet image each pixel in the acquisition window of transducer in other words, all can a corresponding ruddiness augmenting factor, a green glow augmenting factor and a blue light augmenting factor, thereby proofreading and correct in processing and can proofread and correct for the display parameters of each pixel in ultraviolet image.Specifically, above-mentioned correcting unit can comprise:

1) correction module, show component for the ruddiness of proofreading and correct the second pixel according to ruddiness augmenting factor, the green glow of proofreading and correct the second pixel according to green glow augmenting factor shows component, and according to blue light augmenting factor proofread and correct the second pixel blue light show component, the second pixel represents the pixel corresponding with the first pixel in ultraviolet image.

More specifically, as the optional mode of one, in embodiments of the present invention, above-mentioned coloured light light source can comprise white light source, and wherein, second acquisition unit can comprise:

1) the first acquisition module, for in the time using white light source to irradiate primary standard substance, using the display parameters of ruddiness sub-pixel point as ruddiness display parameters, using the display parameters of green glow sub-pixel point as green glow display parameters, using the display parameters of blue photons pixel as blue light display parameters; Wherein,

As the optional mode of another kind, in embodiments of the present invention, coloured light light source also can comprise red-light source, green-light source and blue light source, and wherein, second acquisition unit can comprise:

1) irradiation module, for using respectively red-light source, green-light source and blue light source to irradiate primary standard substance, and obtains corresponding ruddiness benchmark image, green glow benchmark image and blue light benchmark image;

2) the second acquisition module, be used for using the display parameters of pixel corresponding ruddiness benchmark image as ruddiness display parameters, using the display parameters of pixel corresponding in green glow benchmark image as green glow display parameters, and using the display parameters of pixel corresponding in blue light benchmark image as blue light display parameters.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. an image acquiring method, is characterized in that, comprising:

Use successively each the irradiation object in multiple light sources, described multiple light sources comprise ultraviolet source and one or more other light sources, and wherein, the exposure period that described ultraviolet source is corresponding is greater than at least one the corresponding exposure period in described other light sources;

When each in the described multiple light sources of use is irradiated described object, obtain the target image corresponding with described each light source.

2. method according to claim 1, is characterized in that, described use successively in multiple light sources each irradiate object comprise:

Repeat N following operation: in the time, light current light source default lighting, and use described current light source to irradiate described object; Within the default fall time, extinguish described current light source, described exposure period comprises described default lighting time and described default fall time; Default light time and described default fall time and switch to next light source after all finishing described, and using described next light source the current light source in next operation;

Wherein, N represents the sum of described multiple light sources.

3. method according to claim 1, is characterized in that, described other light sources comprise following one of at least: red-light source, green-light source, blue light source, white light source, infrared light supply.

4. according to the method in any one of claims 1 to 3, it is characterized in that, described obtain the target image corresponding with described each light source after, described method also comprises:

According to coloured light correction parameter, ultraviolet image is proofreaied and correct, described ultraviolet image represents the target image corresponding with described ultraviolet source, wherein, described coloured light correction parameter generates according to benchmark image, and described benchmark image is illustrated in the image of the described primary standard substance obtaining when the one or more coloured light light sources that use in described other light sources irradiate primary standard substance;

Ultraviolet image after output calibration.

5. method according to claim 4, is characterized in that, described according to coloured light correction parameter, described ultraviolet image is proofreaied and correct before, described method also comprises:

In the time using coloured light light source to irradiate described primary standard substance, obtain ruddiness display parameters, green glow display parameters and the blue light display parameters of the first pixel in described benchmark image;

Generate the ruddiness augmenting factor corresponding with described the first pixel according to described ruddiness display parameters, generate the green glow augmenting factor corresponding with described the first pixel according to described green glow display parameters, and generate the blue light augmenting factor corresponding with described the first pixel according to described blue light display parameters, wherein, described coloured light correction parameter comprises described ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor.

6. method according to claim 5, is characterized in that, described coloured light light source comprises white light source, wherein, described in obtain the first pixel in described benchmark image ruddiness display parameters, green glow display parameters and blue light display parameters comprise:

In the time using described white light source to irradiate described primary standard substance, using the display parameters of ruddiness sub-pixel point as described ruddiness display parameters, using the display parameters of green glow sub-pixel point as described green glow display parameters, using the display parameters of blue photons pixel as described blue light display parameters; Wherein,

Described the first pixel comprises described ruddiness sub-pixel point, green glow sub-pixel point and blue photons pixel, described ruddiness sub-pixel point is corresponding with the ruddiness unthreaded hole in the corresponding imaging optical path of described the first pixel, described green glow sub-pixel point is corresponding with the green glow unthreaded hole in described imaging optical path, and described blue photons pixel is corresponding with the blue light unthreaded hole in described imaging optical path.

7. method according to claim 5, it is characterized in that, described coloured light light source comprises red-light source, green-light source and blue light source, wherein, described in obtain the first pixel in described benchmark image ruddiness display parameters, green glow display parameters and blue light display parameters comprise:

Use respectively described red-light source, described green-light source and described blue light source to irradiate described primary standard substance, and obtain corresponding ruddiness benchmark image, green glow benchmark image and blue light benchmark image;

Using the display parameters of pixel corresponding in described ruddiness benchmark image as described ruddiness display parameters, using the display parameters of pixel corresponding in described green glow benchmark image as described green glow display parameters, and using the display parameters of pixel corresponding in described blue light benchmark image as described blue light display parameters.

8. method according to claim 5, is characterized in that, describedly according to coloured light correction parameter, described ultraviolet image is proofreaied and correct and is comprised:

The ruddiness of proofreading and correct the second pixel according to described ruddiness augmenting factor shows component, the green glow of proofreading and correct the second pixel according to described green glow augmenting factor shows component, and according to described blue light augmenting factor proofread and correct the second pixel blue light show component, described the second pixel represents the pixel corresponding with described the first pixel in described ultraviolet image.

9. an image acquiring device, is characterized in that, comprising:

Illumination unit, for using successively each irradiation object of multiple light sources, described multiple light source comprises ultraviolet source and one or more other light sources, and wherein, the exposure period that described ultraviolet source is corresponding is greater than at least one the corresponding exposure period in described other light sources;

The first acquiring unit, in the time using each of described multiple light sources to irradiate described object, obtains the target image corresponding with described each light source.

10. device according to claim 9, is characterized in that, described illumination unit comprises:

Irradiation module, for repeating N following operation: light current light source in the time default lighting, and use described current light source to irradiate described object; Within the default fall time, extinguish described current light source, described exposure period comprises described default lighting time and described default fall time; Default light time and described default fall time and switch to next light source after all finishing described, and using described next light source the current light source in next operation;

Wherein, N represents the sum of described multiple light sources.

11. devices according to claim 9, is characterized in that, described other light sources comprise following one of at least: red-light source, green-light source, blue light source, white light source, infrared light supply.

12. according to the device described in any one in claim 9 to 11, it is characterized in that, also comprises:

Correcting unit, for ultraviolet image being proofreaied and correct according to coloured light correction parameter, described ultraviolet image represents the target image corresponding with described ultraviolet source, wherein, described coloured light correction parameter generates according to benchmark image, and described benchmark image is illustrated in the image of the described primary standard substance obtaining when the one or more coloured light light sources that use in described other light sources irradiate primary standard substance;

Output unit, for the ultraviolet image after output calibration.

13. devices according to claim 12, is characterized in that, also comprise:

Second acquisition unit, in the time using coloured light light source to irradiate described primary standard substance, obtains ruddiness display parameters, green glow display parameters and the blue light display parameters of the first pixel in described benchmark image;

Generation unit, for generating the ruddiness augmenting factor corresponding with described the first pixel according to described ruddiness display parameters, generate the green glow augmenting factor corresponding with described the first pixel according to described green glow display parameters, and generate the blue light augmenting factor corresponding with described the first pixel according to described blue light display parameters, wherein, described coloured light correction parameter comprises described ruddiness augmenting factor, green glow augmenting factor and blue light augmenting factor.

14. devices according to claim 13, is characterized in that, described coloured light light source comprises white light source, and wherein, described second acquisition unit comprises:

The first acquisition module, for in the time using described white light source to irradiate described primary standard substance, using the display parameters of ruddiness sub-pixel point as described ruddiness display parameters, using the display parameters of green glow sub-pixel point as described green glow display parameters, using the display parameters of blue photons pixel as described blue light display parameters; Wherein,

15. devices according to claim 13, is characterized in that, described coloured light light source comprises red-light source, green-light source and blue light source, and wherein, described second acquisition unit comprises:

Irradiation module, for using respectively described red-light source, described green-light source and described blue light source to irradiate described primary standard substance, and obtains corresponding ruddiness benchmark image, green glow benchmark image and blue light benchmark image;

The second acquisition module, be used for using the display parameters of pixel corresponding described ruddiness benchmark image as described ruddiness display parameters, using the display parameters of pixel corresponding in described green glow benchmark image as described green glow display parameters, and using the display parameters of pixel corresponding in described blue light benchmark image as described blue light display parameters.

16. devices according to claim 13, is characterized in that, described correcting unit comprises:

Correction module, show component for the ruddiness of proofreading and correct the second pixel according to described ruddiness augmenting factor, the green glow of proofreading and correct the second pixel according to described green glow augmenting factor shows component, and according to described blue light augmenting factor proofread and correct the second pixel blue light show component, described the second pixel represents the pixel corresponding with described the first pixel in described ultraviolet image.