CN107786814A - One kind is based on wide dynamic image processing method, device and exposure circuit - Google Patents

One kind is based on wide dynamic image processing method, device and exposure circuit Download PDF

Info

Publication number
CN107786814A
CN107786814A CN201610720722.3A CN201610720722A CN107786814A CN 107786814 A CN107786814 A CN 107786814A CN 201610720722 A CN201610720722 A CN 201610720722A CN 107786814 A CN107786814 A CN 107786814A
Authority
CN
China
Prior art keywords
image
exposure
image element
short
element circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610720722.3A
Other languages
Chinese (zh)
Other versions
CN107786814B (en
Inventor
王艳侠
洪晖潞
陈树毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Hikvision Digital Technology Co Ltd
Original Assignee
Hangzhou Hikvision Digital Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Hikvision Digital Technology Co Ltd filed Critical Hangzhou Hikvision Digital Technology Co Ltd
Priority to CN201610720722.3A priority Critical patent/CN107786814B/en
Publication of CN107786814A publication Critical patent/CN107786814A/en
Application granted granted Critical
Publication of CN107786814B publication Critical patent/CN107786814B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/50—Control of the SSIS exposure
    • H04N25/57—Control of the dynamic range
    • H04N25/58—Control of the dynamic range involving two or more exposures
    • H04N25/587—Control of the dynamic range involving two or more exposures acquired sequentially, e.g. using the combination of odd and even image fields
    • H04N25/589—Control of the dynamic range involving two or more exposures acquired sequentially, e.g. using the combination of odd and even image fields with different integration times, e.g. short and long exposures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

Included the embodiment of the invention discloses one kind based on wide dynamic image processing method, device and exposure circuit, this method：At least corresponding first image element circuit for being used to grow exposure of each pixel and second image element circuit for being used to carry out short exposure in image processing system, and each first image element circuit and each second image element circuit are after each self-corresponding long exposure reset signal and short exposure reset signal is received, start simultaneously at exposure, generate the first long exposure image and the first short exposed images, reduce the time interval for starting exposure, solve in wide dynamic data and motion flaw be present.Then in order to form the preferable image of effect, the first of each pixel the long exposure image and the first short exposed images are overlapped, obtain effective exposure image of each pixel.

Description

One kind is based on wide dynamic image processing method, device and exposure circuit
Technical field
It is more particularly to a kind of based on wide dynamic image processing method, device the present invention relates to technical field of image processing And exposure circuit.
Background technology
Wide dynamic technique is a kind of technology for allowing video camera to see the characteristic of image under contrast strongly and using, Wide dynamic technique makes scene middle light details and dark portion details while can be particularly clear to see.WDR(Wide Dynamic Range, wide dynamic range) it is the most bright brightness signal value that image can be differentiated and the ratio for the most dark light signal value that can be differentiated Value.Wide dynamic range is bigger, and the level that it can be showed is abundanter, and the highlights details and dark portion details that can be recorded simultaneously are richer It is rich.
Traditional wide dynamic technique be using the mechanism of multiframe synthesis, will carry out growing expose formed exposure image and Carry out the exposure image that short exposure is formed and be overlapped the wide dynamic data of acquisition.
Using the image processing system of traditional wide dynamic technique, can be double exposed for each pixel, including one Vice-minister exposes and a short exposure, then according to the double exposure long exposure image and short exposed images that are generated carry out screening and Superposition, effective exposure image is obtained, and then carry out follow-up image processing flow.Wherein, exposure depends on image element circuit.It is existing In technology, the corresponding image element circuit of each pixel.Traditional image element circuit is as shown in figure 1, specific exposure process is：In picture When element proceeds by exposure, image processor sends reset signal RST to the image element circuit and starts reset operation, so that photoelectricity two Pole pipe PD output voltage is set to 0；Photodiode PD absorbs optical signal and carries out the accumulative of effective charge, when reaching exposure Between after threshold value, the accumulative end of effective charge；The effective charge that photodiode PD adds up is changed by source follower T1 Into analog voltage signal, opto-electronic conversion is realized；Row gate pulse RS starts address selection switch T2, and the analog voltage signal being converted into leads to Alignment output is crossed, the analog voltage signal passes through analog/digital conversion, generation data signal (long exposure image), completes single exposure. Then exposed next time again, to generate short exposed images.Double exposed and just have the operation of RST resets twice, gone forward side by side Capable photoelectric conversion process twice.Double exposing, formed exposure image is overlapped, and obtains effective exposure image.
It can be seen that having time is poor between RST resets operation twice, for mobile object, carry out growing the formed exposure of exposure Motion flaw, and exposure diagram occurs in the wide dynamic data for the exposure image synthesis that light image and progress short exposure are formed As bigger with the time interval of beginning time for exposure between exposure image, motion flaw is more obvious.Time difference is bigger, and pixel starts The time interval being exposed is bigger, and it is more obvious that flaw is moved in the wide dynamic data formed.
The content of the invention
The embodiment of the invention discloses one kind based on wide dynamic image processing method, device and exposure circuit, to reduce Start the time interval of exposure, solve the problems, such as motion flaw in wide dynamic data be present.Concrete scheme is as follows：
On the one hand, the embodiments of the invention provide one kind based on wide dynamic image processing method, applied to image procossing System, at least corresponding first image element circuit and one for being used to grow exposure of each pixel in described image processing system Individual the second image element circuit for being used to carry out short exposure, methods described include：
Obtain long the exposure reset signal and short exposure reset signal for each pixel；
By the transmission simultaneously of long exposure reset signal and short exposure reset signal to corresponding each first image element circuit and often Individual second image element circuit, so that each first image element circuit and each second image element circuit start simultaneously at exposure, generate each picture First long exposure image of vegetarian refreshments and the first short exposed images；
The first of each pixel long exposure image and the first short exposed images are overlapped, obtain each pixel Effective exposure image.
Optionally, it is described to be overlapped the first long exposure image and the first short exposed images, effective exposure image is obtained, Including：
According to the described first long exposure image and the exposure ratio of first short exposed images, to the first short exposure figure As being normalized, second short exposed images consistent with the described first long exposure image data amount are obtained；
By the second brightness value of second exposure image compared with preset threshold range；
If the second brightness value is more than the maximum in the preset threshold range, first short exposed images are determined To can use exposure image；
If the second brightness value is less than the minimum value in the preset threshold range, the described first long exposure image is determined To can use exposure image；
If the second brightness value is in preset threshold range, according to the described first long exposure image and the first short exposure figure The monochrome information of picture determines that exposure image can be used；
It can be handled using default brightness Homogenization Mean with exposure image described, obtain effective exposure of brightness homogenizing Light image.
Optionally, it is described to be determined that exposure is used according to the monochrome information of the described first long exposure image and the first short exposed images Light image, including：
Described first long exposure image and first short exposed images are merged by predetermined ratio, obtain available exposure Light image.
Optionally, it is described according to the described first long exposure image and the exposure ratio of first short exposed images, to described First short exposed images are normalized, and obtain second short exposed images consistent with the described first long exposure image data amount, Including：Obtain the first brightness value of first short exposed images；First brightness value is multiplied by the exposure ratio, obtain with The second consistent short exposed images of the first long exposure image data amount.
Optionally, corresponding two the first image element circuits of each pixel and two the second pixels in described image processing system Circuit；The pixel, which is averaged, is divided into four regions；Described two first image element circuit difference corresponding pixel points one are right Two regions on linea angulata；Two regions on described two second image element circuit difference another diagonal of corresponding pixel points；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
Optionally, it is described to be handled using default brightness Homogenization Mean with exposure image described, obtain brightness Effective exposure image institute of homogenizing using formula is：
Y=X1*K1+X2*K2+X3*K3+X4*K4；
Wherein, the Y represents effective exposure image；The X1And X4Described two first image element circuits are represented respectively Brightness value, the X in two regions on one diagonal of corresponding pixel points respectively2And X3Described two second pixel electricity are represented respectively The brightness value in two regions on difference one diagonal of corresponding pixel points of road；The K1、K2、K3And K4Respectively represent be in advance The X1, the X2, the X3And the X4The weight coefficient of setting；Wherein, exposure image is used by described first when described When short exposed images determine, the X1And X4Take 0；When it is described can be determined with exposure image by the described first long exposure image when, institute State X2And X3Take 0；When described true by the monochrome information of the described first long exposure image and the first short exposed images with exposure image Regularly, the X1、X2、X3And X4For intrinsic brilliance value.
On the other hand, the embodiments of the invention provide one kind based on wide dynamic image processing apparatus, at image Reason system, in described image processing system at least corresponding one of each pixel be used to carrying out the first image element circuit for growing exposure and One the second image element circuit for being used to carry out short exposure, described device include：
First obtains module, for obtaining long exposure reset signal and short exposure reset signal for each pixel；
Sending module, for long exposure reset signal and short exposure reset signal to be sent to corresponding each first simultaneously Image element circuit and each second image element circuit, so that each first image element circuit and each second image element circuit start simultaneously at exposure Light, generate the first long exposure image and the first short exposed images；
Second obtains module, for the first of each pixel the long exposure image and the first short exposed images to be folded Add, obtain effective exposure image of each pixel.
Optionally, the second acquisition module includes normalization unit, comparing unit, the first determining unit, the second determination Unit, the 3rd determining unit and processing unit；
The normalization unit, for the exposure according to the described first long exposure image and first short exposed images Than being normalized to first short exposed images, it is short obtaining second consistent with the described first long exposure image data amount Exposure image；
The comparing unit, specifically for by the second brightness value of second exposure image and preset threshold range phase Than；
First determining unit, will if being more than the maximum in the preset threshold range for the second brightness value First short exposed images are defined as available exposure image；
Second determining unit, will if being less than the minimum value in the preset threshold range for the second brightness value The first long exposure image is defined as available exposure image；
3rd determining unit, if be in for the second brightness value in preset threshold range, according to the described first length The monochrome information of exposure image and the first short exposed images determines that exposure image can be used；
The processing unit, for can be handled using default brightness Homogenization Mean with exposure image described, obtain To effective exposure image of brightness homogenizing.
Optionally, the 3rd determining unit, specifically for by the described first long exposure image and first short exposure Image is merged by predetermined ratio, obtains available exposure image.
Optionally, the normalization unit, the first brightness value specifically for obtaining first short exposed images；By institute State the first brightness value and be multiplied by the exposure ratio, obtain the second short exposure figure consistent with the described first long exposure image data amount Picture.
Optionally, corresponding two the first image element circuits of each pixel and two the second pixels in described image processing system Circuit；The pixel, which is averaged, is divided into four regions；Described two first image element circuit difference corresponding pixel points one are right Two regions on linea angulata；Two regions on described two second image element circuit difference another diagonal of corresponding pixel points；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
Optionally, it is described to be handled using default brightness Homogenization Mean with exposure image described, obtain brightness Effective exposure image institute of homogenizing using formula is：
Y=X1*K1+X2*K2+X3*K3+X4*K4；
Wherein, the Y represents effective exposure image；The X1And X4Described two first image element circuits are represented respectively Brightness value, the X in two regions on one diagonal of corresponding pixel points respectively2And X3Described two second pixel electricity are represented respectively The brightness value in two regions on difference one diagonal of corresponding pixel points of road；The K1、K2、K3And K4Respectively represent be in advance The X1, the X2, the X3And the X4The weight coefficient of setting；Wherein, exposure image is used by described first when described When short exposed images determine, the X1And X4Take 0；When it is described can be determined with exposure image by the described first long exposure image when, institute State X2And X3Take 0；When described true by the monochrome information of the described first long exposure image and the first short exposed images with exposure image Regularly, the X1、X2、X3And X4For intrinsic brilliance value.
On the other hand, the embodiments of the invention provide a kind of exposure circuit, it is used to carry out growing exposure including at least one First image element circuit and second image element circuit for being used to carry out short exposure；
Each first image element circuit is connected with image processor, and it is multiple to receive the long exposure that described image processor is sent Position signal carries out growing exposure；
Each second image element circuit is connected with described image processor, receives the short exposure that described image processor is sent Light reset signal carries out short exposure.
Optionally, corresponding two the first image element circuits of the exposure circuit and two the second image element circuits；Each pixel It is averaged and is divided into four regions；Described two first image element circuit difference corresponding pixel points, one diagonal Shang Liangge area Domain；Two regions on described two second image element circuit difference another diagonal of corresponding pixel points；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
Optionally, the first alignment of described two first image element circuits is connected, and the first of described two first image element circuits Row gating signal line is connected；
Second alignment of described two second image element circuits is connected, the second row gating letter of described two second image element circuits Number line is connected.
Optionally, first image element circuit includes the first photodiode, the first source follower and the first addressing Switch；
First photodiode, for receiving the length of described image processor transmission in first image element circuit After exposing reset signal, output voltage is set to 0, and absorbs optical signal and carries out the accumulative of the first effective charge；
First source follower, first effective optical charge conversion for first photodiode to be added up Into the first analog voltage signal；
First address selection switch, for after the first row gating signal of described image processor transmission is received, inciting somebody to action First analog voltage signal that first source follower is changed is exported by the first alignment；
Second image element circuit includes the second photodiode, the second source follower and the second address selection switch；
Second photodiode, for receiving the short of described image processor transmission in second image element circuit After exposing reset signal, output voltage is set to 0, and absorbs optical signal and carries out the accumulative of the second effective charge；
Second source follower, second effective optical charge conversion for second photodiode to be added up Into the second analog voltage signal；
Second address selection switch, for after the second row gating signal of described image processor transmission is received, inciting somebody to action Second analog voltage signal that second source follower is changed is exported by the second alignment.
Optionally, the first A/D converter is also included in first image element circuit；
First A/D converter, first analog voltage signal for will be exported from first alignment turn The first data signal is changed into export to described image processor；
Also include the second A/D converter in second image element circuit；
Second A/D converter, second analog voltage signal for will be exported from second alignment turn The second data signal is changed into export to described image processor.
In this programme, at least corresponding first picture for being used to grow exposure of each pixel in image processing system Plain circuit and one are used for the second image element circuit for carrying out short exposure, obtain for each pixel long exposure reset signal and Short exposure reset signal, while send to corresponding each first image element circuit and each second image element circuit, so that each the One image element circuit and each second image element circuit start simultaneously at exposure, generate the first long exposure image and the first short exposed images, Reduce the time interval for starting exposure, solve in wide dynamic data and motion flaw be present, it is then preferable in order to form effect Image, the first of each pixel the long exposure image and the first short exposed images are overlapped, obtain each pixel Effective exposure image.Certainly, any product or method for implementing the present invention must be not necessarily required to reach above-described institute simultaneously There is advantage.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic diagram of traditional image element circuit；
A kind of schematic flow sheet based on wide dynamic image processing method that Fig. 2 is provided by the embodiment of the present invention；
A kind of specific implementation schematic flow sheet that Fig. 3 is step S203 shown in Fig. 2；
A kind of structural representation based on wide dynamic image processing apparatus that Fig. 4 is provided by the embodiment of the present invention；
Fig. 5 is the second a kind of concrete structure schematic diagram for obtaining module in Fig. 4 shown devices；
A kind of structural representation for exposure circuit that Fig. 6 is provided by the embodiment of the present invention；
A kind of circuit diagram for exposure circuit that Fig. 7 is provided by the embodiment of the present invention；
The distribution schematic diagram of a kind of first image element circuit and the second image element circuit that Fig. 8 is provided by the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
The embodiments of the invention provide one kind based on wide dynamic image processing method, device and exposure circuit, to reduce Start the time interval of exposure, solve the problems, such as motion flaw in wide dynamic data be present.
The one kind provided first below the embodiment of the present invention is based on wide dynamic image processing method and is introduced.
It should be noted that the embodiment of the present invention provided based on wide dynamic image processing method, can apply to Image processing system, at least corresponding first pixel for being used to grow exposure of each pixel in described image processing system Circuit and second image element circuit for being used to carry out short exposure.Wherein, first image element circuit and the second image element circuit be each The corresponding time for exposure can be controlled by upper application software.
As shown in Fig. 2 the embodiment of the present invention provided based on wide dynamic image processing method, following step can be included Suddenly：
S201：Obtain long the exposure reset signal and short exposure reset signal for each pixel；
It is understood that after wide dynamic function is opened, described image processing system is obtained for each pixel Long exposure reset signal and short exposure reset signal, wherein, length exposure reset signal can phase with the short exposure reset signal Together, can also be different.A kind of in the specific implementation, length exposure reset signal and the short exposure reset signal can be to reset Signal RST.
And it is possible to obtain length exposure reset signal and short exposure reset signal using prior art, do not do herein superfluous State.
S202：Long exposure reset signal and short exposure reset signal are sent to corresponding each first image element circuit simultaneously With each second image element circuit, so that each first image element circuit and each second image element circuit start simultaneously at exposure, generation the One long exposure image and the first short exposed images；
In order to ensure that each first image element circuit and each second image element circuit can be exposed simultaneously, elimination starts to expose The time interval of light, solve the problems, such as motion flaw in wide dynamic data be present.The long exposure that image processing system will be obtained Reset signal and short exposure reset signal are sent to corresponding each first image element circuit and each second image element circuit simultaneously.Often Individual first image element circuit and each second image element circuit start simultaneously at exposure, generate the first long exposure image and the first short exposure figure Picture.
Wherein, for each first image element circuit and each second image element circuit when being exposed, with prior art phase Together, will not be described here.
S203：The first of each pixel long exposure image and the first short exposed images are overlapped, obtain each picture Effective exposure image of vegetarian refreshments.
It is understood that for the first short exposed images, its time for exposure is shorter, and pixel is it is possible that expose The phenomenon of light deficiency, now, the image that can be formed corresponding part is excessively dark, and the dark portion details of picture cannot get good body It is existing.For the first long exposure image, its time for exposure is longer, pixel it is possible that exposure over-saturation phenomenon, this When, the image that can be formed corresponding part is excessively bright, and the highlights details of picture cannot also embody well.In order to form effect Preferable image, more can fully intactly the highlights details in display image and dark portion details, it is necessary to according to generated One long exposure image and the first short exposed images determine effective exposure image, then carry out follow-up image processing flow.Its In, the first long exposure image of each pixel and the first short exposed images, which are overlapped, can use prior art, herein Do not repeat.
Using the embodiment of the present invention, at least corresponding one of each pixel is used to carry out growing exposure in image processing system First image element circuit and second image element circuit for being used to carry out short exposure, the long exposure obtained for each pixel reset Signal and short exposure reset signal, while send to corresponding each first image element circuit and each second image element circuit, so that Each first image element circuit and each second image element circuit start simultaneously at exposure, generate the first long exposure image and the first short exposure Image, reduce the time interval for starting exposure, solve in wide dynamic data and motion flaw be present, then in order to form effect Preferable image, the first of each pixel the long exposure image and the first short exposed images are overlapped, obtain each pixel Effective exposure image of point.
In a kind of specific implementation, as shown in figure 3, described enter the first long exposure image and the first short exposed images Row superposition, obtains effective exposure image (S203), including：
S301：It is short to described first according to the described first long exposure image and the exposure ratio of first short exposed images Exposure image is normalized, and obtains second short exposed images consistent with the described first long exposure image data amount；
S302：By the second brightness value of second exposure image compared with preset threshold range；
S303：If the second brightness value is more than the maximum in the preset threshold range, by the first short exposure figure As being defined as available exposure image；
S304：If the second brightness value is less than the minimum value in the preset threshold range, by the described first long exposure diagram As being defined as available exposure image；
S305：It is short according to the described first long exposure image and first if the second brightness value is in preset threshold range The monochrome information of exposure image determines that exposure image can be used；
S306：It can be handled using default brightness Homogenization Mean with exposure image described, obtain brightness homogenizing Effective exposure image.
Because the first short exposed images are different from the time for exposure of the first long exposure image, its brightness of image presented is deposited In difference, in order to guarantee preferably to be determined preferably available according to the first short exposed images and the first long exposure image Exposure image.First according to the first long exposure image and the exposure ratio of the first short exposed images, the first short exposed images are carried out Normalization, the first short exposed images are transformed into in the first long same data volume of exposure image, obtaining the second short exposed images. Wherein, the exposure ratio of the first long exposure image and the first short exposed images can determine according to prior art, will not be described here. Also, the first short exposed images, which are normalized, can also use prior art.For example, it is right before being normalized For the first long exposure image, its corresponding data volume is probably 16bit, and for the first short exposed images, its is right The data volume answered is probably 12bit.According to the described first long exposure image and the exposure ratio of first short exposed images, to institute State after the first short exposed images are normalized, the second short exposed images that data volume is 16bit can be obtained.
At this point it is possible to directly by the second brightness value of the second exposure image compared with preset threshold range.Wherein, this is default Threshold range can be determined by prior art.And it is to be appreciated that when the second brightness value is more than in preset threshold range Maximum when, may indicate that corresponding pixel points in the first long exposure image it is possible that the phenomenon of exposure over-saturation, is Make the better quality of available exposure image, ensure the complete embodiment of the highlights details of exposure image, it may be determined that the first short exposure Light image is available exposure image；When the second brightness value is less than the minimum value in preset threshold range, it may indicate that first is short Corresponding pixel points in exposure image are it is possible that expose insufficient phenomenon, in order that the quality of exposure image can be used more It is good, ensure the complete embodiment of the dark portion details of exposure image, it may be determined that the first long exposure image is available exposure image；When When two brightness values are in preset threshold range, it may indicate that pixel exposure is sufficient corresponding to the first short exposed images, also, Pixel corresponding to first long exposure image exposes non-over-saturation, now can be according to the first long exposure image and the first short exposure The monochrome information of image determines that exposure image can be used, you can passes through the first long exposure diagram with the value of exposure image corresponding pixel points The monochrome information of the corresponding pixel points of picture and the first short exposed images determines.
It should be noted that when the second brightness value is in preset threshold range, the first short exposed images are may indicate that Corresponding pixel exposure is sufficient, also, pixel corresponding to the first long exposure image exposes non-over-saturation.Now, can should First short exposed images and the first long exposure image respective pixel are pressed predetermined ratio and merged, and obtain each pixel can Use exposure image.
For each pixel, while long short exposure is carried out, each pixel carries out the part of short exposure, forms the One short exposed images, each pixel grow the part of exposure, form the first long exposure image.It is it is understood that each Pixel grow the part of exposure, and due to not carrying out short exposure, corresponding part is not in the first short exposed images formed Generate brightness；Each pixel carries out the part of short exposure, due to not carrying out growing exposure, in the first long exposure image formed Middle corresponding part does not generate brightness.Exposed to ensure to be used according to determined by the first long exposure image and the first short exposed images The integrality and brightness uniformity of light image, can be using default brightness Homogenization Mean to can use at exposure image Reason, obtain effective exposure image of brightness homogenizing.
It is understood that the available exposure image of each pixel has three kinds of situations, one is：Second short exposed images When second brightness value of corresponding pixel points is more than the maximum in preset threshold range, the value of corresponding pixel is short for first The value of the corresponding pixel points of exposure image；Secondly it is：Second brightness value of the second short exposed images corresponding pixel points is less than default During minimum value in threshold range, the values of corresponding pixel points for the corresponding pixel points of the first long exposure image value；Thirdly it is： When second brightness value of the second short exposed images corresponding pixel points is in preset threshold range, the value of corresponding pixel points is root The value determined according to the monochrome information of the first long exposure image and the first short exposed images.
It is described according to the described first long exposure image and first short exposed images in a kind of specific implementation Ratio is exposed, first short exposed images are normalized, obtains consistent with the described first long exposure image data amount the Two short exposed images, including：
Obtain the first brightness value of first short exposed images；First brightness value is multiplied by the exposure ratio, obtained To second short exposed images consistent with the described first long exposure image data amount.
Because the first short exposed images are different from the time for exposure of the first long exposure image, the brightness value of corresponding pixel Data volume can have differences, in order to determine preferably to can use exposure image, can be determined using prior art the first length expose Light image and the exposure of the first short exposed images ratio, first short exposed images are converted to and the first long exposure image data amount The second consistent short exposed images, in order to the screening to can use exposure image.For example, the first long exposure image data amount For 16bit, the first short exposure image data amount is 12bit, and it is exposed than being 4：3(16：12), with first short exposed images The first corresponding brightness value is multiplied by the exposure than 4：3, obtain the second short exposed images that data volume is 16bit.
Other, the first long exposure image can also be transformed into second length consistent with the first short exposure image data amount Exposure image, then the 3rd brightness value according to corresponding to the second long exposure image, carries out follow-up available exposure image really Fixed, this is also possible.
In a kind of specific implementation, corresponding two the first image element circuits of each pixel in described image processing system With two the second image element circuits；The pixel, which is averaged, is divided into four regions；Described two first image element circuits are right respectively Answer two regions on one diagonal of pixel；Described two second image element circuits distinguish another diagonal of corresponding pixel points On two regions；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
As shown in figure 8, exposing luminance proportion in order that obtaining in each pixel, each pixel can be averagely divided into Four regions, wherein, two regions (region 1 and region 4, or region 2 and region 3) carry out growing exposure, two regions (region 2 and region 3, or region 1 and region 4) carry out short exposure.Grow two the first image element circuits difference respective pixel of exposure Two regions on one diagonal of point, such as：Region 1 and region 4 in Fig. 8, carry out two the second image element circuits of short exposure Two regions on another diagonal of corresponding pixel points respectively, such as：Region 2 and region 3 in Fig. 8.And in order to ensure to expose The synchronization of optical circuit, the reset terminal of two the first image element circuits are connected, and the reset terminal of two the second image element circuits is connected.And it is The time difference between long exposure and short exposure is reduced, avoids the problem of motion flaw, first picture in wide dynamic data being present Plain circuit and the second image element circuit receive reset signal simultaneously, start simultaneously at exposure.
It is described to be carried out using default brightness Homogenization Mean to described with exposure image in a kind of specific implementation Processing, the effective exposure image institute for obtaining brightness homogenizing are using formula：
Y=X1*K1+X2*K2+X3*K3+X4*K4；
Wherein, the Y represents effective exposure image；The X1And X4Described two first image element circuits are represented respectively Brightness value, the X in two regions on one diagonal of corresponding pixel points respectively2And X3Described two second pixel electricity are represented respectively The brightness value in two regions on difference one diagonal of corresponding pixel points of road；The K1、K2、K3And K4Respectively represent be in advance The X1, the X2, the X3And the X4The weight coefficient of setting；Wherein, exposure image is used by described first when described When short exposed images determine, the X1And X4Take 0；When it is described can be determined with exposure image by the described first long exposure image when, institute State X2And X3Take 0；When described true by the monochrome information of the described first long exposure image and the first short exposed images with exposure image Regularly, the X1、X2、X3And X4For intrinsic brilliance value.
Wherein, K1、K2、K3And K4It can be set according to actual conditions, not limited herein.It is understood that It is to correspond to each pixel respectively to carry out brightness homogenizing when handling available exposure image.
Corresponding to above method embodiment, the embodiments of the invention provide one kind to be based on wide dynamic image processing apparatus, Image processing system is can apply to, at least corresponding one of each pixel is used to carry out growing exposure in described image processing system The first image element circuit and one be used to carry out the second image element circuit of short exposure, as shown in figure 4, described device can include：
First obtains module 401, and the long exposure reset signal and short exposure for obtaining for each pixel reset letter Number；
Sending module 402, for long exposure reset signal and short exposure reset signal to be sent to corresponding each simultaneously First image element circuit and each second image element circuit, so that each first image element circuit and each second image element circuit start simultaneously at Exposure, generate the first long exposure image and the first short exposed images；
Second obtains module 403, for the first of each pixel the long exposure image and the first short exposed images to be carried out Superposition, obtain effective exposure image of each pixel.
Using the embodiment of the present invention, at least corresponding one of each pixel is used to carry out growing exposure in image processing system First image element circuit and second image element circuit for being used to carry out short exposure, the long exposure obtained for each pixel reset Signal and short exposure reset signal, while send to corresponding each first image element circuit and each second image element circuit, so that Each first image element circuit and each second image element circuit start simultaneously at exposure, generate the first long exposure image and the first short exposure Image, reduce the time interval for starting exposure, solve in wide dynamic data and motion flaw be present, then in order to form effect Preferable image, the first of each pixel the long exposure image and the first short exposed images are overlapped, obtain each pixel Effective exposure image of point.
In a kind of specific implementation, as shown in figure 5, it is described second obtain module 403 include normalization unit 501, Comparing unit 502, the first determining unit 503, the second determining unit 504, the 3rd determining unit 505 and processing unit 506；
The normalization unit 501, for the exposure according to the described first long exposure image and first short exposed images Light ratio, first short exposed images are normalized, obtain second consistent with the described first long exposure image data amount Short exposed images；
The comparing unit 502, specifically for by the second brightness value and preset threshold range of second exposure image Compare；
First determining unit 503, if being more than the maximum in the preset threshold range for the second brightness value, First short exposed images are defined as available exposure image；
Second determining unit 504, if being less than the minimum value in the preset threshold range for the second brightness value, Described first long exposure image is defined as available exposure image；
3rd determining unit 505, if be in for the second brightness value in preset threshold range, according to described first The monochrome information of long exposure image and the first short exposed images determines that exposure image can be used；
The processing unit 506, for can be handled using default brightness Homogenization Mean with exposure image described, Obtain effective exposure image of brightness homogenizing.
In a kind of specific implementation, the 3rd determining unit 505, specifically for by the described first long exposure image Merged with first short exposed images by predetermined ratio, obtain available exposure image.
In a kind of specific implementation, the normalization unit 501, specifically for obtaining first short exposed images The first brightness value；
First brightness value is multiplied by the exposure ratio, obtains consistent with the described first long exposure image data amount Two short exposed images.
In a kind of specific implementation, corresponding two the first image element circuits of each pixel in described image processing system With two the second image element circuits；The pixel, which is averaged, is divided into four regions；Described two first image element circuits are right respectively Answer two regions on one diagonal of pixel；Described two second image element circuits distinguish another diagonal of corresponding pixel points On two regions；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
It is described to be carried out using default brightness Homogenization Mean to described with exposure image in a kind of specific implementation Processing, the effective exposure image institute for obtaining brightness homogenizing are using formula：
Y=X1*K1+X2*K2+X3*K3+X4*K4；
Wherein, the Y represents effective exposure image；The X1And X4Described two first image element circuits are represented respectively Brightness value, the X in two regions on one diagonal of corresponding pixel points respectively2And X3Described two second pixel electricity are represented respectively The brightness value in two regions on difference one diagonal of corresponding pixel points of road；The K1、K2、K3And K4Respectively represent be in advance The X1, the X2, the X3And the X4The weight coefficient of setting；Wherein, exposure image is used by described first when described When short exposed images determine, the X1And X4Take 0；When it is described can be determined with exposure image by the described first long exposure image when, institute State X2And X3Take 0；When described true by the monochrome information of the described first long exposure image and the first short exposed images with exposure image Regularly, the X1、X2、X3And X4For intrinsic brilliance value.
Using the embodiment of the present invention, it is possible to achieve each first image element circuit and each second image element circuit start simultaneously at exposure Light, and obtain effective exposure image of brightness uniformity.
Corresponding to above method embodiment, the embodiments of the invention provide a kind of exposure circuit, as shown in fig. 6, the exposure Optical circuit comprises at least first image element circuit 610 for being used to grow exposure and second picture for being used to carry out short exposure Plain circuit 620；
Each first image element circuit 610 is connected with image processor 600, receives described image processor 600 and sends Long exposure reset signal carry out growing exposure；
Each second image element circuit 620 is connected with described image processor 600, receives described image processor 600 The short exposure reset signal of transmission carries out short exposure.
It should be noted that between each first image element circuit 610 and described image processor 600 shown in Fig. 6 Line, the line between each second image element circuit 620 and described image processor 600 be used only for showing existing it is logical Believe annexation, do not represent entity line.Wherein, exposure circuit provided by the present invention can be applied to each picture In vegetarian refreshments.
, it is necessary to carry out growing exposure respectively to target object and short exposure exposes twice in the circuit for realizing wide dynamic function Light.Image processor 600 is opened by sending long exposure reset signal to each first image element circuit 610 in the embodiment of the present invention Move each first image element circuit 610 and proceed by long exposure, reset letter by sending short exposure to each second image element circuit 620 Number, start each second image element circuit 620 and proceed by short exposure.Wherein, length exposure reset signal and short exposure reset letter Number can be with identical, can also be different.In a kind of specific implementation, length exposure reset signal and short exposure reset signal can To be reset signal RST.
It should be noted that reset signal RST can be that high level is effective, i.e. reset signal RST is every when being high level Individual first image element circuit 610 or each second image element circuit 620 proceed by exposure；It can also be that low level is effective, that is, reset Signal RST when being low level each first image element circuit 610 or each second image element circuit 620 proceed by exposure.
Further it will be understood that image processor 600 can be simultaneously to each first image element circuit 610 and each the Two image element circuits 620 send corresponding long exposure reset signal and short exposure reset signal.So that each first image element circuit 610 Exposure is started simultaneously at each second image element circuit 620, the beginning time for exposure eliminated between long exposure and short exposure is poor.
Described image processor 600 can use SOC picture processing chips.It is understood that it ought not open wide dynamic During function, the long exposure reset signal of output of described image processor 600 or the pin of short exposure reset signal may be at hanging Empty or ground connection state, when opening wide dynamic function, the pin of the long exposure reset signal of output of described image processor 600 Each first image element circuit 610 is accessed, the pin of short exposure reset signal accesses each second image element circuit 620.Each pin Access way can be identical with existing access way.In addition, it is necessary to, it is emphasized that " the first picture in the embodiment of the present invention " second " in " first " and " the second image element circuit " in plain circuit " is used only for distinguishing different pixel electricity from name Road, and do not have any limiting meaning.
First image element circuit for being used to grow exposure is comprised at least using the embodiment of the present invention, in the exposure circuit With second image element circuit for being used to carry out short exposure；Each first image element circuit is connected with image processor, receives image The long exposure reset signal that processor is sent carries out growing exposure；Each second image element circuit is connected with described image processor, connects Receive the short exposure reset signal that image processor is sent and carry out short exposure, each first image element circuit and each second pixel electricity Road can be exposed simultaneously, to reduce the time difference between double exposing.
In a kind of specific implementation, as shown in fig. 7, corresponding two Hes of the first image element circuit 610 of the exposure circuit Two the second image element circuits 620；Each pixel, which is averaged, is divided into four regions；Described two first image element circuits 610 divide Two regions on other one diagonal of corresponding pixel points；It is another that described two second image element circuits 620 distinguish corresponding pixel points Two regions on bar diagonal；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
Luminance proportion is exposed in order that obtaining in each pixel, each pixel can be averagely divided into four regions, Wherein, two regions carry out growing exposure, and two regions carry out short exposure.Two the first image element circuits 610 for grow exposure divide Two regions on other one diagonal of corresponding pixel points, two the second image element circuits 620 for carrying out short exposure correspond to picture respectively Two regions on another diagonal of vegetarian refreshments.And in order to ensure that exposure circuit starts the synchronization of exposure, two the first pixels The reset terminal of circuit 610 is connected, and the reset terminal of two the second image element circuits 620 is connected.And in order to reduce long exposure and short exposure Time difference between light, image processor 600 can be simultaneously to each first image element circuits 610 and each second image element circuit Long exposure reset signal and short exposure reset signal, each first image element circuit 610 and each second picture corresponding to 620 transmissions Plain circuit 620 can receive each self-corresponding long exposure reset signal and short exposure reset signal simultaneously, and then start simultaneously at exposure Light.Wherein it is possible to understand, reset terminal is reset signal input.
In addition, a kind of example of the above-described embodiment only as the present invention, pixel, which can also be averaged, is divided into two areas Domain, eight regions or ten regions etc., this is all possible.
In a kind of specific implementation, the first alignment of described two first image element circuits 610 is connected, and described two The first row gating signal line of one image element circuit 610 is connected；
Second alignment of described two second image element circuits 620 is connected, the second row of described two second image element circuits 620 Gating signal line is connected.
Wherein, for each first image element circuit 610, due to the pixel corresponding to each first image element circuit 610 The exposure position of point is different, and it is carried out after growing exposure, can collectively constitute long exposure signal, this two the first image element circuits 610 The first alignment be connected, resulting long exposure signal is exported as a complete result.Similarly, for each For two image element circuits 620, because the exposure position of the pixel corresponding to each second image element circuit 620 is different, it is carried out After short exposure, short exposure signal can be collectively constituted, the second alignment of this two the second image element circuits 620 is connected, to resulting Short exposure signal exported as a complete result.
Wherein, from prior art, after starting address selection switch by row gating signal, long exposure signal (or short exposure Signal) it can just be exported from the first alignment (the second alignment).In order to ensure that the exposure signal formed in each exposure circuit can Exporting the first row gating signal line of this two the first image element circuits 610 simultaneously can be connected, this two the second image element circuits 620 The second row gating signal line can be connected.
In a kind of specific implementation, as shown in fig. 7, being wrapped in a kind of exposure circuit that the embodiment of the present invention is provided Every one first image element circuit 610 and the circuit structure of every one second image element circuit 620 contained can be with traditional image element circuit Circuit structure is identical.First image element circuit 610 includes the first photodiode PD1, the first source follower T1 and One address selection switch T2；
The first photodiode PD1, for receiving described image processor in first image element circuit 610 After the 600 long exposure reset signals sent, output voltage is set to 0, and absorb optical signal and carry out the accumulative of the first effective charge；
The first source follower T1, for the first effective photoelectricity for adding up the first photodiode PD1 Lotus is converted into the first analog voltage signal；
The first address selection switch T2, for receiving the first row gating signal of the transmission of described image processor 600 Afterwards, the first source follower T1 first analog voltage signals changed are exported by the first alignment；
Second image element circuit includes the second photodiode PD2, the second source follower T3 and the second addressing and opened Close T4；
The second photodiode PD2, for receiving described image processor in second image element circuit 620 After the 600 short exposure reset signals sent, output voltage is set to 0, and absorbs optical signal and carries out the accumulative of the second effective charge；
The second source follower T3, for the second effective photoelectricity for adding up the second photodiode PD2 Lotus is converted into the second analog voltage signal；
The second address selection switch T4, for receiving the second row gating signal of the transmission of described image processor 600 Afterwards, the second source follower T3 second analog voltage signals changed are exported by the second alignment.
Wherein, the time for exposure of each first image element circuit 610 and each second image element circuit 620 can be by image at Reason device 600 controls.By taking the first image element circuit 610 as an example：First image element circuit 610 receives the long exposure that image processor 600 is sent After light reset signal, long exposure is proceeded by.Also, each first image element circuit 610 and each second image element circuit 620 is defeated Going out the time of respective exposure signal can also be controlled by image processor 600.By taking the first image element circuit 610 as an example：First After image element circuit 610 receives the first row gating signal that image processor 600 is sent, the first source follower T1 is turned First analog voltage signal changed is exported by corresponding first alignment.
In order to ensure that exposure signal that each first image element circuit 610 and each second image element circuit 620 formed can be with Export simultaneously, the first row gating signal and the second row gating signal that image processor 600 can be sent simultaneously.This is also can be with 's.In addition, a kind of in the specific implementation, the first row gating signal and the second row gating signal can be with identical, can also be different, should The first row gating signal and the second row gating signal can be row gate pulse RS, wherein, the first row gating signal (the second row Gating signal) can be high level it is effective, i.e., high level when the first address selection switch (the second address selection switch) open；Can also be low Level is effective, i.e., low level when the first address selection switch (the second address selection switch) open；Or the first row gating signal or the second row The effective low level of one high level of gating signal is effective, and this is also possible.
It is emphasized that after each first image element circuit 610 and each second image element circuit 620 reset, will export Voltage is set to 0, and due to the influence of each device in circuit, may be there is the skew of virtual voltage, now be needed to enter effective charge Row is accumulative, avoids influence of the voltage of skew to exposure signal.
In a kind of specific implementation, as shown in fig. 7, in first image element circuit 610 can also include the first mould/ Number converter；
First A/D converter, for first analog voltage signal to be converted into the first data signal；
The second A/D converter can also be included in second image element circuit 620；
Second A/D converter, for second analog voltage signal to be converted into the second data signal.
Further, first analog voltage signal (the second analog voltage signal) passes through corresponding first alignment ( Two alignments) output after, can be directly inputted into the first A/D converter (the second A/D converter) of connection, pass through first First analog voltage signal (the second analog voltage signal) is converted into the first number by A/D converter (the second A/D converter) Word signal (the second data signal) exports to image processor 600 again.Or image processor 600 can be directly inputted, carry out Follow-up image processing flow.
Wherein, the exposure electricity that first A/D converter (the second A/D converter) the access embodiment of the present invention is provided The output end on road.Wherein, as shown in fig. 7, the first A/D converter and the second A/D converter can use A/D converter table Show.
Using the embodiment of the present invention, each first image element circuit and each second image element circuit can be exposed simultaneously, To reduce the time difference between double exposing, and it can realize while the first analog voltage signal and the second analog voltage are believed Number carry out analog/digital conversion.
For systems/devices embodiment, because it is substantially similar to embodiment of the method, so the comparison of description is simple Single, the relevent part can refer to the partial explaination of embodiments of method.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that Other identical element also be present in process, method, article or equipment including the key element.
Can one of ordinary skill in the art will appreciate that realizing that all or part of step in above method embodiment is To instruct the hardware of correlation to complete by program, described program can be stored in computer read/write memory medium, The storage medium designated herein obtained, such as：ROM/RAM, magnetic disc, CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention It is interior.

Claims (17)

1. one kind is based on wide dynamic image processing method, it is characterised in that applied to image processing system, described image processing First image element circuit and one of at least corresponding one of each pixel for grow exposure are used to carry out short exposure in system The second image element circuit, methods described includes：
Obtain long the exposure reset signal and short exposure reset signal for each pixel；
Long exposure reset signal and short exposure reset signal are sent to corresponding each first image element circuit and each the simultaneously Two image element circuits, so that each first image element circuit and each second image element circuit start simultaneously at exposure, generate each pixel The first long exposure image and the first short exposed images；
The first of each pixel long exposure image and the first short exposed images are overlapped, obtain the effective of each pixel Exposure image.
2. it is according to the method for claim 1, described to be overlapped the first long exposure image and the first short exposed images, obtain Effective exposure image is obtained, including：
According to the described first long exposure image and the exposure ratio of first short exposed images, first short exposed images are entered Row normalization, obtains second short exposed images consistent with the described first long exposure image data amount；
By the second brightness value of second exposure image compared with preset threshold range；
If the second brightness value is more than the maximum in the preset threshold range, first short exposed images are defined as can Use exposure image；
If the second brightness value is less than the minimum value in the preset threshold range, the described first long exposure image is defined as can Use exposure image；
If the second brightness value is in preset threshold range, according to the described first long exposure image and the first short exposed images Monochrome information determines that exposure image can be used；
It can be handled using default brightness Homogenization Mean with exposure image described, obtain effective exposure diagram of brightness homogenizing Picture.
3. according to the method for claim 2, it is characterised in that described according to the described first long exposure image and the first short exposure The monochrome information determination of light image can use exposure image, including：
Described first long exposure image and first short exposed images are merged by predetermined ratio, obtain available exposure diagram Picture.
4. according to the method for claim 2, it is characterised in that described according to the described first long exposure image and described first First short exposed images are normalized by the exposure ratio of short exposed images, are obtained and the described first long exposure image number According to the second consistent short exposed images of amount, including：
Obtain the first brightness value of first short exposed images；
First brightness value is multiplied by the exposure ratio, it is short to obtain second consistent with the described first long exposure image data amount Exposure image.
5. according to the method described in claim any one of 1-4, it is characterised in that each pixel in described image processing system Corresponding two the first image element circuits and two the second image element circuits；The pixel, which is averaged, is divided into four regions；Described two Two regions on individual first image element circuit difference, one diagonal of corresponding pixel points；Described two second image element circuits are right respectively Answer two regions on another diagonal of pixel；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
6. according to the method for claim 5, it is characterised in that described to be used using default brightness Homogenization Mean described Exposure image is handled, and the effective exposure image institute for obtaining brightness homogenizing is using formula：
Y=X1*K1+X2*K2+X3*K3+X4*K4；
Wherein, the Y represents effective exposure image；The X1And X4Described two first image element circuit difference are represented respectively Brightness value, the X in two regions on one diagonal of corresponding pixel points2And X3Described two second image element circuits point are represented respectively The brightness value in two regions on other one diagonal of corresponding pixel points；The K1、K2、K3And K4Represent to be in advance described respectively X1, the X2, the X3And the X4The weight coefficient of setting；Wherein, exposure image is used by the described first short exposure when described When light image determines, the X1And X4Take 0；When it is described can be determined with exposure image by the described first long exposure image when, the X2 And X3Take 0；Determined when described with exposure image by the monochrome information of the described first long exposure image and the first short exposed images When, the X1、X2、X3And X4For intrinsic brilliance value.
7. one kind is based on wide dynamic image processing apparatus, it is characterised in that applied to image processing system, described image processing First image element circuit and one of at least corresponding one of each pixel for grow exposure are used to carry out short exposure in system The second image element circuit, described device includes：
First obtains module, for obtaining long exposure reset signal and short exposure reset signal for each pixel；
Sending module, for long exposure reset signal and short exposure reset signal to be sent to corresponding each first pixel simultaneously Circuit and each second image element circuit, so that each first image element circuit and each second image element circuit start simultaneously at exposure, it is raw Into the first long exposure image and the first short exposed images；
Second obtains module, for the first of each pixel the long exposure image and the first short exposed images to be overlapped, obtains Obtain effective exposure image of each pixel.
8. device according to claim 7, it is characterised in that the second acquisition module includes normalization unit, compared Unit, the first determining unit, the second determining unit, the 3rd determining unit and processing unit；
The normalization unit is right for the exposure ratio according to the described first long exposure image and first short exposed images First short exposed images are normalized, and obtain the second short exposure figure consistent with the described first long exposure image data amount Picture；
The comparing unit, specifically for by the second brightness value of second exposure image compared with preset threshold range；
First determining unit, if being more than the maximum in the preset threshold range for the second brightness value, by described in First short exposed images are defined as available exposure image；
Second determining unit, if being less than the minimum value in the preset threshold range for the second brightness value, by described in First long exposure image is defined as available exposure image；
3rd determining unit, if be in for the second brightness value in preset threshold range, exposed according to the described first length The monochrome information of image and the first short exposed images determines that exposure image can be used；
The processing unit, for can be handled using default brightness Homogenization Mean with exposure image described, obtain bright Spend effective exposure image of homogenizing.
9. device according to claim 8, it is characterised in that the 3rd determining unit, specifically for by described first Long exposure image and first short exposed images are merged by predetermined ratio, obtain available exposure image.
10. device according to claim 8, it is characterised in that the normalization unit, specifically for obtaining described first First brightness value of short exposed images；
First brightness value is multiplied by the exposure ratio, it is short to obtain second consistent with the described first long exposure image data amount Exposure image.
11. according to the device described in claim any one of 7-10, it is characterised in that each pixel in described image processing system Corresponding two the first image element circuits of point and two the second image element circuits；The pixel, which is averaged, is divided into four regions；It is described Two regions on two the first image element circuit difference one diagonal of corresponding pixel points；Described two second image element circuit difference Two regions on another diagonal of corresponding pixel points；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
12. device according to claim 11, it is characterised in that it is described using default brightness Homogenization Mean to it is described can Handled with exposure image, the effective exposure image institute for obtaining brightness homogenizing is using formula：
Y=X1*K1+X2*K2+X3*K3+X4*K4；
Wherein, the Y represents effective exposure image；The X1And X4Described two first image element circuit difference are represented respectively Brightness value, the X in two regions on one diagonal of corresponding pixel points2And X3Described two second image element circuits point are represented respectively The brightness value in two regions on other one diagonal of corresponding pixel points；The K1、K2、K3And K4Represent to be in advance described respectively X1, the X2, the X3And the X4The weight coefficient of setting；Wherein, exposure image is used by the described first short exposure when described When light image determines, the X1And X4Take 0；When it is described can be determined with exposure image by the described first long exposure image when, the X2 And X3Take 0；Determined when described with exposure image by the monochrome information of the described first long exposure image and the first short exposed images When, the X1、X2、X3And X4For intrinsic brilliance value.
13. a kind of exposure circuit, it is characterised in that including at least first image element circuit for being used to grow exposure and one For carrying out the second image element circuit of short exposure；
Each first image element circuit is connected with image processor, receives the long exposure that described image processor is sent and resets letter Number carry out growing exposure；
Each second image element circuit is connected with described image processor, receives the short exposure that described image processor is sent and answers Position signal carries out short exposure.
14. exposure circuit according to claim 13, it is characterised in that corresponding two the first pixels electricity of the exposure circuit Road and two the second image element circuits；Each pixel, which is averaged, is divided into four regions；Described two first image element circuit difference Two regions on one diagonal of corresponding pixel points；Described two another of second image element circuit difference corresponding pixel points are diagonal Two regions on line；
The reset terminal of described two first image element circuits is connected；
The reset terminal of described two second image element circuits is connected.
15. exposure circuit according to claim 14, it is characterised in that
First alignment of described two first image element circuits is connected, the first row gating signal line of described two first image element circuits It is connected；
Second alignment of described two second image element circuits is connected, the second row gating signal line of described two second image element circuits It is connected.
16. according to the exposure circuit described in claim any one of 13-15, it is characterised in that wrapped in first image element circuit Include the first photodiode, the first source follower and the first address selection switch；
First photodiode, for receiving the long exposure of described image processor transmission in first image element circuit After reset signal, output voltage is set to 0, and absorbs optical signal and carries out the accumulative of the first effective charge；
First source follower, first effective optical charge for first photodiode to be added up are converted into One analog voltage signal；
First address selection switch, described in after the first row gating signal of described image processor transmission is received, inciting somebody to action First analog voltage signal that first source follower is changed is exported by the first alignment；
Second image element circuit includes the second photodiode, the second source follower and the second address selection switch；
Second photodiode, for receiving the short exposure of described image processor transmission in second image element circuit After reset signal, output voltage is set to 0, and absorbs optical signal and carries out the accumulative of the second effective charge；
Second source follower, second effective optical charge for second photodiode to be added up are converted into Two analog voltage signals；
Second address selection switch, described in after the second row gating signal of described image processor transmission is received, inciting somebody to action Second analog voltage signal that second source follower is changed is exported by the second alignment.
17. according to the exposure circuit described in claim any one of 13-15, it is characterised in that in first image element circuit also Including the first A/D converter；
First A/D converter, for first analog voltage signal exported from first alignment to be converted into First data signal is exported to described image processor；
Also include the second A/D converter in second image element circuit；
Second A/D converter, for second analog voltage signal exported from second alignment to be converted into Second data signal is exported to described image processor.
CN201610720722.3A 2016-08-24 2016-08-24 Wide dynamic image processing method and device and exposure circuit Active CN107786814B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610720722.3A CN107786814B (en) 2016-08-24 2016-08-24 Wide dynamic image processing method and device and exposure circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610720722.3A CN107786814B (en) 2016-08-24 2016-08-24 Wide dynamic image processing method and device and exposure circuit

Publications (2)

Publication Number Publication Date
CN107786814A true CN107786814A (en) 2018-03-09
CN107786814B CN107786814B (en) 2023-08-04

Family

ID=61393305

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610720722.3A Active CN107786814B (en) 2016-08-24 2016-08-24 Wide dynamic image processing method and device and exposure circuit

Country Status (1)

Country Link
CN (1) CN107786814B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108495055A (en) * 2018-04-10 2018-09-04 中国科学院长春光学精密机械与物理研究所 Obtain the method and system of more exposure images for high dynamic range imaging
CN110460781A (en) * 2019-08-26 2019-11-15 Oppo广东移动通信有限公司 A kind of imaging sensor, image processing method and storage medium
CN111491110A (en) * 2020-04-17 2020-08-04 Oppo广东移动通信有限公司 High dynamic range image processing system and method, electronic device, and storage medium
CN111917994A (en) * 2019-05-10 2020-11-10 三星电子株式会社 Method and apparatus for combining image frames captured using different exposure settings into a blended image
CN114513610A (en) * 2020-11-17 2022-05-17 浙江大华技术股份有限公司 Image processing method, image processing apparatus, and storage apparatus
WO2022140897A1 (en) * 2020-12-28 2022-07-07 深圳元戎启行科技有限公司 Image generation method and apparatus, and computer device and storage medium
CN116095502A (en) * 2023-04-13 2023-05-09 芯动微电子科技(珠海)有限公司 Method and device for fusing multiple exposure images

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001016499A (en) * 1999-06-29 2001-01-19 Hitachi Ltd Wide dynamic range image pickup device
KR20080104725A (en) * 2007-05-29 2008-12-03 한국과학기술연구원 Physical property of image sensor used wide dynamic range video signal processing method
KR20090048191A (en) * 2007-11-09 2009-05-13 주식회사 쎄이미지 Color image processing apparatus and method for expanding dynamic range
US20110063483A1 (en) * 2009-09-16 2011-03-17 Altasens, Inc. Image sensor with wide dynamic range
CN102075688A (en) * 2010-12-28 2011-05-25 青岛海信网络科技股份有限公司 Wide dynamic processing method for single-frame double-exposure image
CN102098444A (en) * 2009-12-10 2011-06-15 三星电子株式会社 Multi-step exposure method using electronic shutter and photography apparatus using the same
JP2011244351A (en) * 2010-05-20 2011-12-01 Fujifilm Corp Imaging apparatus and drive control method of solid state image sensor
US20130033616A1 (en) * 2011-08-04 2013-02-07 Sony Corporation Imaging device, image processing method and program
US20130051700A1 (en) * 2011-08-31 2013-02-28 Sony Corporation Image processing apparatus, image processing method, and program
JP2013066145A (en) * 2011-08-31 2013-04-11 Sony Corp Image processing apparatus, image processing method, and program
US20130208138A1 (en) * 2012-02-09 2013-08-15 Aptina Imaging Corporation Imaging systems and methods for generating auto-exposed high-dynamic-range images
CN103685995A (en) * 2012-09-13 2014-03-26 株式会社东芝 Shooting device
CN104639920A (en) * 2013-11-13 2015-05-20 上海微锐智能科技有限公司 Wide dynamic fusion method based on single-frame double-pulse exposure mode
US20150163423A1 (en) * 2013-12-11 2015-06-11 Himax Imaging, Inc. Image sensor and pixel arrary
KR20150124381A (en) * 2014-04-28 2015-11-05 삼성전자주식회사 Image processing device and mobile computing device having same
CN205945977U (en) * 2016-08-24 2017-02-08 杭州海康威视数字技术股份有限公司 Exposure circuit

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001016499A (en) * 1999-06-29 2001-01-19 Hitachi Ltd Wide dynamic range image pickup device
KR20080104725A (en) * 2007-05-29 2008-12-03 한국과학기술연구원 Physical property of image sensor used wide dynamic range video signal processing method
KR20090048191A (en) * 2007-11-09 2009-05-13 주식회사 쎄이미지 Color image processing apparatus and method for expanding dynamic range
US20110063483A1 (en) * 2009-09-16 2011-03-17 Altasens, Inc. Image sensor with wide dynamic range
CN102098444A (en) * 2009-12-10 2011-06-15 三星电子株式会社 Multi-step exposure method using electronic shutter and photography apparatus using the same
JP2011244351A (en) * 2010-05-20 2011-12-01 Fujifilm Corp Imaging apparatus and drive control method of solid state image sensor
CN102075688A (en) * 2010-12-28 2011-05-25 青岛海信网络科技股份有限公司 Wide dynamic processing method for single-frame double-exposure image
US20130033616A1 (en) * 2011-08-04 2013-02-07 Sony Corporation Imaging device, image processing method and program
US20130051700A1 (en) * 2011-08-31 2013-02-28 Sony Corporation Image processing apparatus, image processing method, and program
JP2013066145A (en) * 2011-08-31 2013-04-11 Sony Corp Image processing apparatus, image processing method, and program
US20130208138A1 (en) * 2012-02-09 2013-08-15 Aptina Imaging Corporation Imaging systems and methods for generating auto-exposed high-dynamic-range images
CN103685995A (en) * 2012-09-13 2014-03-26 株式会社东芝 Shooting device
CN104639920A (en) * 2013-11-13 2015-05-20 上海微锐智能科技有限公司 Wide dynamic fusion method based on single-frame double-pulse exposure mode
US20150163423A1 (en) * 2013-12-11 2015-06-11 Himax Imaging, Inc. Image sensor and pixel arrary
KR20150124381A (en) * 2014-04-28 2015-11-05 삼성전자주식회사 Image processing device and mobile computing device having same
CN205945977U (en) * 2016-08-24 2017-02-08 杭州海康威视数字技术股份有限公司 Exposure circuit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108495055A (en) * 2018-04-10 2018-09-04 中国科学院长春光学精密机械与物理研究所 Obtain the method and system of more exposure images for high dynamic range imaging
CN108495055B (en) * 2018-04-10 2019-11-08 中国科学院长春光学精密机械与物理研究所 Obtain the method and system of more exposure images for high dynamic range imaging
CN111917994A (en) * 2019-05-10 2020-11-10 三星电子株式会社 Method and apparatus for combining image frames captured using different exposure settings into a blended image
CN110460781A (en) * 2019-08-26 2019-11-15 Oppo广东移动通信有限公司 A kind of imaging sensor, image processing method and storage medium
CN110460781B (en) * 2019-08-26 2021-10-12 Oppo广东移动通信有限公司 Image sensor, image processing method and storage medium
CN113709382A (en) * 2019-08-26 2021-11-26 Oppo广东移动通信有限公司 Image sensor, image processing method and storage medium
CN111491110A (en) * 2020-04-17 2020-08-04 Oppo广东移动通信有限公司 High dynamic range image processing system and method, electronic device, and storage medium
CN111491110B (en) * 2020-04-17 2021-09-17 Oppo广东移动通信有限公司 High dynamic range image processing system and method, electronic device, and storage medium
WO2021208593A1 (en) * 2020-04-17 2021-10-21 Oppo广东移动通信有限公司 High dynamic range image processing system and method, electronic device, and storage medium
CN114513610A (en) * 2020-11-17 2022-05-17 浙江大华技术股份有限公司 Image processing method, image processing apparatus, and storage apparatus
WO2022140897A1 (en) * 2020-12-28 2022-07-07 深圳元戎启行科技有限公司 Image generation method and apparatus, and computer device and storage medium
CN116095502A (en) * 2023-04-13 2023-05-09 芯动微电子科技(珠海)有限公司 Method and device for fusing multiple exposure images

Also Published As

Publication number Publication date
CN107786814B (en) 2023-08-04

Similar Documents

Publication Publication Date Title
CN107786814A (en) One kind is based on wide dynamic image processing method, device and exposure circuit
US10861133B1 (en) Super-resolution video reconstruction method, device, apparatus and computer-readable storage medium
DE102004063847B4 (en) Circuit arrangement for DMA image data processing and camera interface
US20140247979A1 (en) Method and device for generating high dynamic range images
CN101388950B (en) Content-adaptive contrast improving method and apparatus for digital image
TW201349852A (en) Image processing apparatus and image processing method
DE10261373A1 (en) Apparatus and method for converting picture elements from the YUV format to the RGB format using color conversion tables
JPH05241550A (en) Color picture converting method
CN115082350A (en) Stroboscopic image processing method and device, electronic device and readable storage medium
CN116095502B (en) Method and device for fusing multiple exposure images
JP2921973B2 (en) Image extraction method and image extraction device for specific object
CN106558019A (en) Picture arrangement method and device
KR100561462B1 (en) Image processing method and apparatus in image forming system
CN205945977U (en) Exposure circuit
CN108683842B (en) Panoramic camera and method and device for outputting panoramic video
JPH04301966A (en) Color image reader
DE102009061757B3 (en) Electronic device capable of efficiently transmitting control signals and data between different types of electronic modules
KR100662276B1 (en) apparatus and method for on screen display
KR20180121243A (en) Image Processing Method and Apparatus Using Bus Protocol Based Valid Pixel
JP3466655B2 (en) Image processing device
KR100345686B1 (en) Device and method for converting image into virtual stereo image
KR100308302B1 (en) Apparatus for on screen display in a digital camera
JPS61258567A (en) Digital video signal processing system
JP2689609B2 (en) Video camera equipment
CN116264019A (en) Training method and device for silent image reproduction detection model and related equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant