CN102647565A - Pixel array ranging method, image sensor and image sensing method - Google Patents
Pixel array ranging method, image sensor and image sensing method Download PDFInfo
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Abstract
In order to improve the image dynamic range of an image sensor, the existing image sensor is configured with different exposure features according to each line, and the problems of low sampling rate, staggered deviation and the like can occur during the interpolation data recovery. The invention provides an image sensor, an image sensing method and a pixel array ranging method. The sensor comprises a pixel array, wherein pixels with different exposure features and identical color types in the same line of the pixel array are in alternate distribution at intervals, in addition, in the same line of the pixel array, the pixels with different exposure features and the identical color types are in alternate distribution at intervals. During the interpolation data recovery of pixel values with the other exposure features on the pixels (B1, B2) with the same kind of exposure features, the pixel value provided by the pixels with the color types and the other kind of exposure features in the same row and the same line as the pixel is used. The pixel array ranging method, the image sensor and the image sensing method have the advantages that the sampling rate is improved, the staggered deviation is avoided, and meanwhile, the higher dynamic range and the better image quality are realized.
Description
Technical field
The present invention relates to field of image sensors.
Background technology
Imageing sensor is often used in has the very bright scene and the unusual scene of the scene of dark, scene for example backlight simultaneously.For these scenes; All pixels in the pattern matrix of conventional imageing sensor adopt identical Exposure mode; Thereby make the image or the in the dark under-exposed dark place details of losing of catching; Thereby the over-exposed bright place details of losing at bright place is difficult to take into account simultaneously part bright with dark in the Same Scene.Along with the continuous lifting of image sensor resolutions, the area of photosensitive pixel unit will further reduce, and this problem shows more outstandingly.Therefore, need some technological improvements, obtain the image of HDR.
The method of obtaining high dynamic range images at present mainly contains two kinds:
● a kind of data processing that is based on image is obtained static high dynamic range images, is specially: all row to the photosensitive pixel array carry out time exposure, obtain the time exposure signal of whole frame, and with these signal storage to the specific memory space; All row to the photosensitive pixel array carry out the short time exposure, and short time exposure signal that obtains and the time exposure signal that is stored in particular memory space are synthesized, and typical synthetic method is: y=a*x1+b*x2; Wherein y is final output pixel value; X1 is the long exposure value of this pixel, and x2 is the short exposure value of this pixel, and a and b are weight coefficient; And satisfy a+b=1; A and b can be constant, also can regulate automatically with the bright-dark degree of pixel, and the most simply be y=0.5*x1+0.5*x2.Thereby, form image with HDR.This method needs the pixel cell data of the whole frame of access, expends more storage resources and processing time, and is double exposed in the front and back of different periods of Same Scene, and final image is easy to generate smear, is applicable to software approach processing still image.
● the method that another kind obtains high dynamic range images then be based on line direction to down-sampling (subsample), some row in the photosensitive pixel array is carried out time exposure, other row is carried out the short time exposure.As shown in fig. 1, grey behavior short exposure wherein, the long exposure of white behavior, R, G, B represent redness, green and blue pixel respectively.After exposure, through the long exposure and the short exposure value of each pixel of interpolation acquisition, selection or synthetic in time exposure row or short time exposure row then.Selection strategy generally is the bright-dark degree according to current pixel, and long exposure value is preferentially selected in the dark place, and the short exposure value is preferentially selected at bright place, and middle then length exposure combines.This method does not need extra memory space, and processing speed is fast.But row is different with the column direction sampling, and the difficulty that data are recovered is by the low direction decision of sample rate.Here this existing method of being carried; Long exposure row and short exposure are capable alternately; But what take with all pixels in the delegation all is the same time for exposure; The sample rate of the length of column direction exposure pixel is 0 like this, can only utilize the data of up-downgoing in the same row during recovery, shown in left part among Fig. 1; Perhaps utilize the data of tilted direction, shown in right part among Fig. 2.Its shortcoming is: because based on to down-sampling, the line direction of pel array and column direction sample rate are inconsistent, data are difficult to perfect the recovery during full size image output, are applicable to the high dynamic range images of in sampling process downwards, exporting reduced size.
Summary of the invention
Existing in the technology of down-sampling, for the mode that adopts up-downgoing, shown in left part among Fig. 1, in order to recover long exposure pixel B
1The short exposure value, adopt two short exposure values of up-downgoing to carry out interpolation, about the information of row be 0, the data that recover are easy to produce bigger deviation with actual.And when adopting the mode of tilted direction, for example recover long exposure pixel B
2The short exposure value time, shown in right part among Fig. 1, adopt the value of the pixel at four diagonal angles to come interpolation, and recover adjacent long exposure pixel B
3The short exposure value time, also adopt the value of the pixel at four diagonal angles to come interpolation, the locus can interlock, promptly the pixel of previous column is used for recovering back one row, the pixel of back one row is used for recovering previous column, and long exposure pixel B
2And B
3Used interpolating pixel does not have identical, occurs image deflects such as sawtooth easily.
In order to solve these technical problems, design of the present invention is, in pel array, and with the different time for exposure of distribution that the photosensitive pixel in the delegation is spaced apart, the different time for exposure of distribution that the photosensitive pixel in the same row also is spaced apart.Allow when interpolation like this; When a kind of time for exposure pixel position is obtained the pixel value of its another kind of exposure; Can use simultaneously and its pixel value with the another kind of time for exposure pixel of delegation and same row, the dimension of interpolation expand as the row to row to, improved sample rate; And do not exist staggeredly, reduced image deflects.
According to a first aspect of the invention, a kind of imageing sensor is provided, has contained pel array; It is characterized in that; In the same delegation of this pel array, the same hue type pixel alternate intervals with different exposure characteristicses distributes, and; In the same row of this pel array, this same hue type pixel alternate intervals with different exposure characteristicses distributes.
Correspondingly; A kind of device that the pixel value that imageing sensor obtained of first aspect of the present invention is handled also is provided; It is characterized in that; Color type pixel to certain first exposure characteristics; When obtaining the data of the second corresponding exposure characteristics of this pixel, this device use: be in the pixel value that provides with this color type pixel delegation, that have second exposure characteristics and be in the pixel value that this color type pixel same row, that have second exposure characteristics provides with this pixel with this pixel.
The advantage of above scheme is, when interpolation, can use simultaneously and its pixel value with the another kind of time for exposure pixel of delegation and same row, the dimension of interpolation expand as row to row to, and do not exist staggeredly, reduced image deflects.
According to one preferred embodiment, the same hue type pixel element itself of same delegation in the said pel array and same row can be configured has different exposure characteristicses.
This execution mode is that pixel element itself is improved, and makes it have different exposure characteristicses.
Further, said pixel be configured to following each:
-have different exposure times with delegation with this same hue type pixel spaced apart in the same row;
-have different susceptibilitys with delegation with this same hue type pixel spaced apart in the same row;
-have different gains with delegation with this same hue type pixel spaced apart in the same row.
This execution mode provides the various configurations pixel element to have the execution mode of different exposure characteristicses.
Further, this imageing sensor also comprises:
Control circuit, the same hue type pixel that is used to dispose with delegation and same row has similar and different exposure characteristics;
Analysis module, be used to analyze the contrast grade of the image of treating sensing: when contrast grade was higher than certain condition, said control circuit provided different exposure characteristicses; Otherwise
Said control circuit provides identical exposure characteristics.
This execution mode can select pointedly to use scheme of the present invention or existing scheme according to the contrast grade of image, has very strong flexibility and adaptability, and more excellent image quality can be provided.
Further, when said control circuit is during with delegation's exposure time different with this same hue type pixel arrangement spaced apart in the same row,
Respectively for each row successively of this pel array, said control circuit first constantly reset first exposure characteristics in the delegation pixel, after the reset pixel of second exposure characteristics in this row of second moment, subsequently:
After the 3rd constantly read the pixel value of entire row of pixels; Or
Constantly read the pixel value of the pixel of first exposure characteristics the 3rd, and read the pixel value of the pixel of second exposure characteristics in the 4th different moment;
And the time for exposure of said each row pixel of control circuit control overlaps at least.
This execution mode provides a kind of image sensing mode of the exposure of rolling, and the time for exposure of each row is overlapping at least in part, can shorten the time for exposure of entire pixel array, improves frame per second.
One preferred embodiment in, this imageing sensor also comprises:
The light transmission filter lens array is positioned on this pel array, and each printing opacity filter is used to allow incident light to pass and be radiated at corresponding pixel, and,
The printing opacity filter corresponding respectively with this same hue type pixel spaced apart in delegation and the same row has different light transmittances, thereby makes each pixel spaced apart have different exposure characteristicses.
This execution mode carries out light intensity attenuation through the filter that different light transmittance is provided for each pixel, comes for the pixel of different exposure characteristicses is provided.
One preferred embodiment in, this pel array has multicolour type pixel, one by one corresponding at least three kinds of colors,
For various color types, this color type is expert at and is belonged in the row, has this kind color type pixel of different exposure characteristicses spaced apart respectively.
This execution mode is applicable to the pel array of multicolour passage, can support the various color types in the pel array respectively.
Further, below said pel array and the multicolour type pixel correspondence each:
-RGGB paxel arrays, the red, green, blue pixel;
-CYYM paxel arrays, blue or green, yellow, fuchsin pixel;
-RGWB paxel arrays, red, green, white, blue pixel;
-CYWM paxel arrays, blue or green, yellow, white, fuchsin pixel;
-RGEB paxel arrays, red, green, emerald green, blue pixel;
-CYGM paxel arrays, blue or green, yellow, green, fuchsin pixel.
This execution mode has been enumerated some kinds of pel arrays concrete, the present invention's multicolour passage applicatory.
Further, said exposure characteristics comprises strong and weak two kinds of exposure characteristicses,
In this pel array, comprise that the 2x2 pixel groups of all color type pixels has identical exposure characteristics,
In alternately the distribute pixel groups of strong and weak exposure characteristics of the row/column direction of pel array.
This mode provides the layout of preferred checkerboard type, has the synthetic and restorability of better image.
Correspondingly, according to a third aspect of the present invention, a kind of image sensing method is provided also; This method uses pel array that image is carried out sensitization, it is characterized in that, in the same delegation of this pel array; Alternate intervals ground obtains the pixel value of the different exposure characteristicses of same hue type pixel; And in the same row of this pel array, alternate intervals ground obtains the pixel value of the different exposure characteristicses of this same hue type pixel.
In addition; According to a fourth aspect of the present invention; The method that the pixel value that also provides a kind of image sensing method to according to a third aspect of the present invention to be obtained is handled; It is characterized in that, to the first color type pixel of a certain exposure characteristics, when obtaining the data of the corresponding another kind of exposure characteristics of this pixel; Use: be in the pixel value that provides with identical first color type pixel delegation, that have this another kind exposure characteristics with this pixel, and be in the pixel value that the identical first color type pixel same row, that have this another kind exposure characteristics provides with this pixel.
Further; The first color type pixel to this kind exposure characteristics; When obtaining the data of this corresponding another kind exposure characteristics of this pixel, use: the pixel value that adjacent with this pixel, different rows and/or identical first color type pixel different lines, that have this another kind exposure characteristics provide.
And, according to a fifth aspect of the present invention, a kind of aligning method of pel array of imageing sensor is provided; It is characterized in that; In the same delegation of this pel array, alternate intervals ground is arranged has the same hue type pixel of different exposure characteristicses, and; In the same row of this pel array, alternate intervals ground is arranged has this same hue type pixel of different exposure characteristicses.
Other advantage of the present invention will be described below, and is perhaps understood by those skilled in the art through the explanation of hereinafter.
Description of drawings
Through reading the detailed description of doing with reference to following accompanying drawing that non-limiting example is done, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows existing pel array and the picture element interpolation mode that is used to improve the imageing sensor of dynamic range;
Fig. 2 shows the pel array according to the imageing sensor of an embodiment of the invention;
Fig. 3 shows the exposure of pel array shown in Figure 2 and reads sequential;
Fig. 4 shows and is applicable to several frequently seen colour filter array pattern of the present invention;
Fig. 5 shows the mode of pel array shown in Figure 2 being carried out picture element interpolation;
In the accompanying drawing, same or analogous Reference numeral is represented same or analogous steps characteristic or parts (module) characteristic.
Embodiment
The invention provides a kind of imageing sensor; Contain pel array, it is characterized in that, in the same delegation of this pel array; Same hue type pixel alternate intervals with different exposure characteristicses distributes; And in the same row of this pel array, this same hue type pixel alternate intervals with different exposure characteristicses distributes.
In field of image sensors, multicolour filter array pattern is applied to the photosensitive pixel array, to produce coloured image.Preferably, for respectively the row and the place at this color type place are listed as this kind color type pixel of the different exposure characteristicses of arrangement alternate intervals.
Shown in Figure 2 this Bayer colour filter array adopts RGB three primary colors pixel for a kind of photosensitive pixel exposure characteristics of Bayer colour filter array that is applicable to distributes the arrangement sketch map, and its pattern is RGGB (red-green-green-indigo plant) array pattern.Exposure characteristics comprises strong and weak two kinds of exposure characteristicses; In this pel array; Each 2x2 pixel groups (RGGB) has identical exposure characteristics; In alternately the distribute RGGB pixel groups of strong and weak exposure characteristics of the row/column direction of pel array, this photosensitive pixel of grey colour specification corresponds to weak exposure among the figure, the corresponding heavy exposure of this photosensitive pixel of white expression.
In a more concrete execution mode, for the same hue type pixel element itself with delegation and same row in the pel array disposes different exposure characteristicses.
Configuration pixel element itself has different exposure characteristicses and can be realized by a lot of methods, for example is with the different exposure time of this same hue type pixel arrangement spaced apart in delegation and the same row.In the instance shown in Figure 2, the photosensitive pixel in every row is divided into two groups according to the difference of time for exposure, and wherein the heavy exposure pixel of white expression has the long time for exposure, and the weak exposure pixel of grey colour specification has the short time for exposure.For example, the 1st row has the short time for exposure with photosensitive pixel such as the 2nd capable the 1st, 2,5,6,9,10,13,14; The 1st row has the long time for exposure with photosensitive pixel such as the 2nd capable the 3rd, 4,7,8,11,12,15,16; The 3rd row has the long time for exposure with photosensitive pixel such as the 4th capable the 1st, 2,5,6,9,10,13,14; The 3rd row has the short time for exposure with photosensitive pixel such as the 4th capable the 3rd, 4,7,8,11,12,15,16; Other row rule according to this replaces repetition.Every like this two field picture will be assigned the exposure pixel of time exposure pixel and short time uniformly, and the alternately rule of row and column direction is identical.
Fig. 3 reads the sequential sketch map for each row of pel array shown in Figure 2 and heavy exposure pixel in every row and weak exposure pixel.Wherein at t
10Constantly, all long exposure photosensitive pixels are reset in the 1st row; At t
11Constantly, the pixel of all short exposures is reset in the 1st row; At t
12Constantly, all long exposure pixel values are read, at t
13Constantly, all short exposure pixels are read.At t
20All long exposure photosensitive pixels are reset in the 2nd row constantly; At t
21Constantly, the pixel of all short exposures is reset in the 2nd row; At t
22The moment and t
23Constantly, the long exposure and the short exposure pixel of the 2nd row are read respectively.The 3rd row and subsequent rows rule are according to this analogized.Be appreciated that and shown in Figure 2ly read in the sequential sketch map t
12The moment and t
13Constantly can be synchronization, promptly long exposure and short exposure pixel also can be read simultaneously.
Preferably, the time for exposure and the previous row of each row are overlapping at least in part, have realized the exposure of rolling like this, have improved the exposure rate and the frame per second of entire pixel array.
In the execution mode of other variations,, pixel element itself can also be embodied as for providing different exposure characteristicses:
-be with the different susceptibility of this same hue type pixel arrangement spaced apart in delegation and the same row;
-be with the different gain of this same hue type pixel arrangement spaced apart in delegation and the same row.
Above configuration can be fixed up when imageing sensor is made.Perhaps, alternatively, pixel element is manufactured to and can be disposed exposure characteristics in real time, and a control circuit can be used in and is these pixel element configuration exposure characteristicses.
Concrete, this imageing sensor also contains an analysis module, is used to analyze the contrast grade of the image of treating sensing.The method of analyzing contrast grade is existing, and the histogram of analysis image for example when clear zone and dark space are too much, can think that contrast grade is too high; When perhaps analyzing two colour temperature districts and all gray-scale distribution being arranged, can think that contrast grade is too high.When contrast grade was higher than certain condition, above control circuit configuration had similar and different exposure characteristics with the same hue type pixel of delegation and same row, for example controls each pixel and has the different time for exposure; Otherwise control circuit is the pixel of same hue type identical exposure characteristics is provided, for example has the identical time for exposure.
In another embodiment; For different exposure characteristicses is provided to pel array, this imageing sensor also comprises the light transmission filter lens array above pel array; Each printing opacity filter is used to allow incident light to pass and be radiated at corresponding pixel; And the printing opacity filter corresponding respectively with this same hue type pixel spaced apart in delegation and the same row has different light transmittances, thereby makes each pixel spaced apart have different exposure characteristicses.For example, the another kind of implementation of instance shown in Figure 2 can be through on each photosensitive pixel, distributing the filter with different light transmittances.For example, the 1st row and photosensitive pixels such as the 1st, 2,5,6,9,10,13,14 distribution of the 2nd row have the filter of low-transmittance; The 1st row and photosensitive pixels such as the 3rd, 4,7,8,11,12,15,16 distribution of the 2nd row have the filter of high transmission rate; The 3rd row and photosensitive pixels such as the 1st, 2,5,6,9,10,13,14 distribution of the 4th row have the filter of high transmission rate; The 3rd row and photosensitive pixels such as the 3rd, 4,7,8,11,12,15,16 distribution of the 4th row have the filter of low-transmittance; Other row rule according to this replaces repetition.
More than describe the aligning method and the structure of pel array, be directed against the interpolation method of this pel array below.
When certain strong/weak exposure picture element interpolation being recovered it, equally distributed around utilizing, promptly the pixel value with the weak/heavy exposure characteristic of delegation and same row carries out corresponding to the pixel value of weak/heavy exposure characteristic.Concrete, as shown in Figure 5, for long exposure pixel B
1, utilize four short exposure pixel values to carry out interpolation with delegation and same column distribution, obtain the corresponding short exposure value of this point.Similarly, for long exposure pixel B
2, also use four short exposure pixel values that utilize with delegation and same column distribution to carry out interpolation.Through after such interpolation, each pixel all with having long exposure value and short exposure value simultaneously, utilizes aforesaid synthetic method to obtain the end value of this point again.Especially, as pointed among Fig. 5, these two adjacent long exposure picture element interpolations have used common short exposure pixel, do not have data interlace, and the image that recovers like this is difficult for producing defective.Certainly, when interpolation, can also further use and this pixel B
1The pixel value that the blue channel pixel of the short exposure of adjacent, different rows and/or different lines (tilted direction) provides.
What more than describe is application mode of the present invention under three look RGB passages, and the present invention also is applicable under other color channels.It is to be these color scheme in three look RGB, three look CYM (blue or green, yellow, fuchsin), four look RGWB (red, green, white, indigo plant), four look CYWM (blue or green, yellow, white, fuchsin), four look RGEB (red, green, emerald green, indigo plant) and four look CYGM (blue or green, yellow, green, the fuchsin) passage at the different exposure characteristicses that dispose alternate intervals with delegation and same row that Fig. 4 top has provided the present invention respectively with the bottom from left to right from left to right.
Although in accompanying drawing and aforesaid description sets forth in detail with the present invention has been described, should think that this is illustrated and describes is illustrative and exemplary, rather than restrictive; The invention is not restricted to above-mentioned execution mode.For example, more than use by force to describe with weak two kinds of exposure characteristicses, and in fact, exposure characteristics is not limited to two kinds, two or more exposure characteristicses also are feasible, and can improve the degree of refinement of exposure characteristics, thereby improve image quality.
The those skilled in the art in those present technique fields can be through research specification, disclosed content and accompanying drawing and appending claims, and understanding and enforcement are to other changes of the execution mode of disclosure.In practical application of the present invention, the function of a plurality of technical characterictics of being quoted during a part possibility enforcement of rights requires.In claim, word " comprises " element and the step of not getting rid of other, and wording " one " is not got rid of plural number.Any Reference numeral in the claim should not be construed as the restriction to scope.
Claims (27)
1. the aligning method of the pel array of an imageing sensor is characterized in that,
In the same delegation of this pel array, alternate intervals ground is arranged has the same hue type pixel of different exposure characteristicses, and,
In the same row of this pel array, alternate intervals ground is arranged has this same hue type pixel of different exposure characteristicses.
2. method according to claim 1 is characterized in that, for the same hue type pixel element itself with delegation and same row in the said pel array disposes different exposure characteristicses.
3. method according to claim 2 is characterized in that, said configuration step comprise following each:
-be with the different exposure time of this same hue type pixel arrangement spaced apart in delegation and the same row;
-be with the different susceptibility of this same hue type pixel arrangement spaced apart in delegation and the same row;
-be with the different gain of this same hue type pixel arrangement spaced apart in delegation and the same row.
4. according to claim 2 or 3 described methods, it is characterized in that this method also comprised the steps: before said configuration step
Judge the contrast grade of the image of treating sensing: when contrast grade is higher than certain condition, carry out said configuration step; Otherwise
For with the identical exposure characteristics of this same hue type pixel arrangement in delegation and the same row.
5. method according to claim 1 is characterized in that, for same hue type pixel spaced apart in the same row different light intensity attenuations being provided with delegation, has each pixel of different exposure characteristicses thereby arrange.
6. aligning method according to claim 1 is characterized in that, this pel array has multicolour type pixel, one by one corresponding at least three kinds of colors,
Respectively for various color types, be expert at and belong to row, this kind color type pixel of arranging the different exposure characteristicses of alternate intervals in this color type.
7. aligning method according to claim 6 is characterized in that, below said pel array and the multicolour type pixel correspondence each:
-RGGB paxel arrays, the red, green, blue pixel;
-CYYM paxel arrays, blue or green, yellow, fuchsin pixel;
-RGWB paxel arrays, red, green, white, blue pixel;
-CYWM paxel arrays, blue or green, yellow, white, fuchsin pixel;
-RGEB paxel arrays, red, green, emerald green, blue pixel;
-CYGM paxel arrays, blue or green, yellow, green, fuchsin pixel.
8. aligning method according to claim 6 is characterized in that, said exposure characteristics comprises strong and weak two kinds of exposure characteristicses,
In this pel array, arrange the 2x2 pixel groups that comprises all color types and have identical exposure characteristics, and,
Alternately arrange the pixel groups of strong and weak exposure characteristics at the row/column direction of said pel array.
9. an imageing sensor contains pel array, it is characterized in that,
In the same delegation of this pel array, the same hue type pixel alternate intervals with different exposure characteristicses distributes, and,
In the same row of this pel array, this same hue type pixel alternate intervals with different exposure characteristicses distributes.
10. imageing sensor according to claim 9 is characterized in that, the same hue type pixel element itself of same delegation in the said pel array and same row can be configured has different exposure characteristicses.
11. imageing sensor according to claim 10 is characterized in that, said pixel be configured to following each:
-have different exposure times with delegation with this same hue type pixel spaced apart in the same row;
-have different susceptibilitys with delegation with this same hue type pixel spaced apart in the same row;
-have different gains with delegation with this same hue type pixel spaced apart in the same row.
12. according to claim 10 or 11 described imageing sensors, it is characterized in that, also comprise:
Control circuit, the same hue type pixel that is used to dispose with delegation and same row has similar and different exposure characteristics;
Analysis module, be used to analyze the contrast grade of the image of treating sensing: when contrast grade was higher than certain condition, said control circuit provided different exposure characteristicses; Otherwise
Said control circuit provides identical exposure characteristics.
13. imageing sensor according to claim 12 is characterized in that, when said control circuit is during with delegation's exposure time different with this same hue type pixel arrangement spaced apart in the same row,
Respectively for each row successively of this pel array, said control circuit first constantly reset first exposure characteristics in the delegation pixel, after the reset pixel of second exposure characteristics in this row of second moment, subsequently:
After the 3rd constantly read the pixel value of entire row of pixels; Or
Constantly read the pixel value of the pixel of first exposure characteristics the 3rd, and read the pixel value of the pixel of second exposure characteristics in the 4th different moment;
And the time for exposure of said each row pixel of control circuit control overlaps at least.
14. imageing sensor according to claim 9 is characterized in that, also comprises:
The light transmission filter lens array is positioned on this pel array, and each printing opacity filter is used to allow incident light to pass and be radiated at corresponding pixel, and,
The printing opacity filter corresponding respectively with this same hue type pixel spaced apart in delegation and the same row has different light transmittances, thereby makes each pixel spaced apart have different exposure characteristicses.
15. imageing sensor according to claim 9 is characterized in that, this pel array has multicolour type pixel, one by one corresponding at least three kinds of colors,
For various color types, this color type is expert at and is belonged in the row, has this kind color type pixel of different exposure characteristicses spaced apart respectively.
16. imageing sensor according to claim 15 is characterized in that, below said pel array and the multicolour type pixel correspondence each:
-RGGB paxel arrays, the red, green, blue pixel;
-CYYM paxel arrays, blue or green, yellow, fuchsin pixel;
-RGWB paxel arrays, red, green, white, blue pixel;
-CYWM paxel arrays, blue or green, yellow, white, fuchsin pixel;
-RGEB paxel arrays, red, green, emerald green, blue pixel;
-CYGM paxel arrays, blue or green, yellow, green, fuchsin pixel.
17. imageing sensor according to claim 15 is characterized in that, said exposure characteristics comprises strong and weak two kinds of exposure characteristicses,
In this pel array, comprise that the 2x2 pixel groups of all color type pixels has identical exposure characteristics,
In alternately the distribute pixel groups of strong and weak exposure characteristics of the row/column direction of pel array.
18. device to handling according to the pixel value that each described imageing sensor obtained among the claim 9-17; It is characterized in that; To the color type pixel of a certain exposure characteristics, when obtaining the data of the corresponding another kind of exposure characteristics of this pixel, this installs use:
With this pixel be in the pixel value that provides with this color type pixel delegation, that have this another kind exposure characteristics and
Be in the pixel value that this color type pixel same row, that have this another kind exposure characteristics provides with this pixel.
19. device according to claim 18 is characterized in that, this device is an interpolating unit,
This interpolating unit uses this color type pixel with this a certain exposure characteristics to be in the pixel value that this color type pixel with delegation and adjacent and same row and adjacent this another kind exposure characteristics provides, and obtains the data of this another kind exposure characteristics of this pixel correspondence.
20. an image sensing method, this method use pel array that image is carried out sensitization, it is characterized in that,
In the same delegation of this pel array, alternate intervals ground obtains the pixel value of the different exposure characteristicses of same hue type pixel, and,
In the same row of this pel array, alternate intervals ground obtains the pixel value of the different exposure characteristicses of this same hue type pixel.
21. image sensing method according to claim 20 is characterized in that, behind the different exposure characteristics of the same hue type pixel element configuration of same delegation in the said pel array and same row itself, obtains the pixel value of different exposure characteristicses.
22. method according to claim 21 is characterized in that, said configuration step comprise following each:
-be with the different exposure time of this same hue type pixel arrangement spaced apart in delegation and the same row;
-be with the different susceptibility of this same hue type pixel arrangement spaced apart in delegation and the same row;
-be with the different gain of this same hue type pixel arrangement spaced apart in delegation and the same row.
23., it is characterized in that this method also comprised the steps: according to claim 21 or 22 described image sensing methods before said configuration step
Judge the contrast grade of the image of treating sensing: when contrast grade is higher than certain condition, carry out said configuration step; Otherwise
For with the identical exposure characteristics of this same hue type pixel arrangement in delegation and the same row.
24. image sensing method according to claim 22; It is characterized in that; When being during with delegation's exposure time different with this same hue type pixel arrangement spaced apart in the same row, respectively for each row successively of this pel array, first reset first exposure characteristics in the delegation constantly pixel; After second constantly reset second exposure characteristics in this row pixel, subsequently:
After the 3rd constantly read the pixel value of entire row of pixels; Or
Constantly read the pixel value of the pixel of first exposure characteristics the 3rd, and read the pixel value of the pixel of second exposure characteristics in the 4th different moment;
And the time for exposure of each row pixel overlaps at least.
25. image sensing method according to claim 20 is characterized in that this method comprises the steps:
For decaying with the additional different light intensity of the same hue type pixel spaced apart in delegation and the same row to this image;
Read the pixel value of each pixel, thereby obtain pixel value with the different exposure characteristicses of the same hue type pixel spaced apart in delegation and the same row.
26. method according to claim 20 is characterized in that, this pel array has multicolour type pixel, one by one corresponding at least three kinds of colors,
Respectively for various color types, be expert at and belong to row in this color type, be the different exposure characteristicses of this kind color type pixel arrangement of alternate intervals.
27. method that the pixel value that each described image sensing method among the claim 20-26 is obtained is handled; It is characterized in that; To the first color type pixel of a certain exposure characteristics, when obtaining the data of the corresponding another kind of exposure characteristics of this pixel, use:
With this pixel be in the pixel value that provides with identical first color type pixel delegation, that have this another kind exposure characteristics and
Be in the pixel value that the identical first color type pixel same row, that have this another kind exposure characteristics provides with this pixel.
Priority Applications (1)
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