CN101431637B - Frame data processing apparatus and method - Google Patents
Frame data processing apparatus and method Download PDFInfo
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- CN101431637B CN101431637B CN 200710165743 CN200710165743A CN101431637B CN 101431637 B CN101431637 B CN 101431637B CN 200710165743 CN200710165743 CN 200710165743 CN 200710165743 A CN200710165743 A CN 200710165743A CN 101431637 B CN101431637 B CN 101431637B
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Abstract
The invention provides a device and a method for processing frame data. A frame data with M*N pixels is divided into a plurality of sub-frame data. The sub-frame is statistical calculated for pixel amount relative to gray value orderly, the sub frame data is inputted into a multiplier after obtaining calculation statistical value. A space domain filter receives and stores at least one calculation statistical value orderly, applies corresponding weighing according with the calculation statistical value and obtains an operation parameter. Finally, the multiplier processes calculus to the sub-frame data that is sent into the multiplier at least next.
Description
Technical field
The present invention relates to the device and method that a kind of frame data are processed, relate in particular to a kind of pixel quantity that utilizes and carry out with respect to the statistical calculation of gray value the device and method that frame data are processed.
Background technology
Flourish along with Information of Science and Technology makes the user require more and more high to function and the sound and light program of multimedia equipment.Not only the body of multimedia equipment itself must meet light, thin, short, little demand, and the display of multimedia equipment is except having abundant color range, also need need higher resolution, higher brightness, higher contrast, larger visible angle and reaction time faster.
The display of multimedia equipment can utilize the frame data processor to carry out frame data and process, and the frame data processor comprises the function that strengthens image contrast.Figure 1A shows in known frame data (Frame Data) processor the device of contrast of block diagram process to strengthen to(for) the image frame data.As shown in Figure 1A, as the frame data (F of whole picture
1) input frame memory 102 and when frame memory 102 stores the frame data of whole pictures thus, the frame data of this whole picture are also inputted arithmetic element 104 simultaneously.This arithmetic element 104 will be carried out pixel quantity with respect to the statistical calculation of gray value to the frame data of whole picture, for example histogram (Histogram) statistics.After this arithmetic element 104 obtains the distribution map (as Figure 1B) of gray value and the pixel quantity of the frame data of its corresponding whole picture, from then on arithmetic element 104 chooses the distribution that accounts for whole pixel quantity special ratios in distribution map, for example accounts for the corresponding gray value of whole pixel quantities 5% and account for the corresponding gray value of whole pixel quantities 95% to be used as counting statistics value C
1, C
2Receive the frame data (F that stores whole picture from frame memory 102 when multiplier (-icator) 106
1) time, and receive simultaneously the counting statistics value C that is inputted by arithmetic element 104
1, C
2, then according to this counting statistics value C
1, C
2To the purpose that performs calculations in whole pixels between pixel quantities 5% to 95% to realize frame data degree of comparing is strengthened.
But with above-mentioned method realize the gaining effect of frame data, because storing and deliver to arithmetic element to whole frame data, process by need, therefore when the data volume of frame data is large, memory relatively also just needs larger capacity to store, and arithmetic element also just needs the more time to process so large data volume.Thus, use in a large number memory will occupy the space of frame data processor wafer, and the purpose that can't realize dwindling frame data processor wafer.Generally speaking, carry out statistics with histogram take whole frame data as the basis, its required memory occupies six, seventy percent area of whole Digital Logic part in wafer, and is even higher.
In order to solve the problem that needs memory capacious and occupy the hardware space owing to processing whole frame data, thereby another kind of the gain device consequentiality of image contrast of memory that omits, as shown in Figure 2.Referring to Fig. 2, frame data F
1, F
2, F
3... be input to successively respectively arithmetic element 202, and synchronously be input to multiplier (-icator) 206.For example, as frame data F
1When being input to multiplier (-icator) 206, frame data F
1Carry out pixel quantity with respect to the statistical calculation of gray value via arithmetic element 202, will obtain one group with the corresponding gray value of whole pixel quantities 5% and account for the counting statistics value C that the corresponding gray value of whole pixel quantities 95% forms
F1
Same, as frame data F
2When being input to multiplier (-icator) 206, frame data F
2Can obtain a counting statistics value C via arithmetic element 202
F2, simultaneously, be positioned at the frame data F of multiplier (-icator) 206
2By frame data F
1Obtain counting statistics value C
F1, come enhancement frame data F
2Reduced value.
Basically, this is by strengthening its contrast with the counting statistics value that frame data were produced front in sequence to being positioned at follow-up frame data.Although the configuration that so practice need not memory because not being adopts existing frame data counting statistics value to strengthen this existing frame data, but is adopted other frame data counting statistics value this existing frame data that gain, and therefore will produce error.
Summary of the invention
Therefore, the device and method that the object of the present invention is to provide a kind of frame data to process, with the consumption that reduces memory and dwindle frame data processor wafer, and the consumption that reduces the hardware resource.
The first embodiment of the present invention is to provide a kind of display unit, and it comprises linear memory, arithmetic element, space domain filter, multiplier (-icator) and liquid crystal panel.Wherein, arithmetic element series connection space domain filter; Linear memory series gain device, and space domain filter is electrically connected multiplier (-icator).Wherein, the large I of linear memory stores the frame data with M*N pixel of 1/P, and wherein, P is to be natural number greater than 1 natural number and M, N.Namely the capacity by linear memory can be divided into the frame data with M*N pixel a P sub-frame data, and wherein, each sub-frame data has M*N/P pixel.Arithmetic element can be carried out pixel quantity with respect to the statistical calculation of gray value to sub-frame data, thereby obtains the counting statistics value.The counting statistics value that arithmetic element produces can be sent into space domain filter successively.
Space domain filter is obtained at least two counting statistics values successively, and according to the corresponding ranking operation counting statistics value that sets, and producing a parameter, and this parameter is sent into multiplier (-icator).
And multiplier (-icator) receives sub-frame data stored by linear memory and output successively, and the relevant parameter of being exported by space domain filter.Multiplier (-icator) strengthens the processing of contrast according to relevant parameter to corresponding sub-frame data.Ye crystal face Ban The is in order to the display frame data.
Because the parameter that is used for processing sub-frame data (except the parameter of the first sub-frame data that is useful in the start frame data) includes the counting statistics value that sub-frame data thus and previous at least sub-frame data produce.Therefore, parameter has comprised the contrast characteristic of sub-frame data, and the effective contrast of enhancer frame data, in addition, this parameter has comprised the contrast metric of previous sub-frame data, makes subframe after processing and the border of the subframe after previous processing be unlikely to produce discontinuous situation.
A kind of method that the present invention provides frame data to process in the first embodiment, its step is as described below: at first, capacity with the frame data with M*N pixel by linear memory is divided into P sub-frame data, arithmetic element can be carried out pixel quantity with respect to the statistical calculation of gray value to sub-frame data, thereby obtains a counting statistics value.Wherein, each sub-frame data has M*N/P pixel, and M, N are natural number greater than 1 for natural number P.
Secondly, the counting statistics value that arithmetic element produces can be sent into space domain filter successively.Space domain filter is obtained at least two counting statistics values successively, and according to the corresponding ranking operation counting statistics value that sets, and producing a parameter, and this parameter is sent into multiplier (-icator).
At last, multiplier (-icator) receives sub-frame data stored by linear memory and output successively, and the relevant parameter of being exported by space domain filter.Multiplier (-icator) strengthens the processing of contrast according to relevant parameter to corresponding sub-frame data.
The second embodiment of the present invention provides a kind of display unit, and it comprises arithmetic element, space domain filter, time-domain filter, multiplier (-icator), and liquid crystal panel.Arithmetic element is electrically connected space domain filter successively, time-domain filter, and multiplier (-icator).In a second embodiment, known time-domain filter is imported, thereby can not need use linear memory, and can guarantee the continuity that data show by the time-domain filter.Therefore, except as the first embodiment in the space domain filter that adopts, add the time-domain filter, can use for the leading portion sub-frame data in frame data and add up and pass through the resulting parameter of computing, strengthen in these frame data than the contrast of back segment sub-frame data or the contrast of different frame data.Ye crystal face Ban The is in order to the display frame data.
A kind of method that the present invention provides frame data to process in a second embodiment, its step comprises: at first, have a M*N pixel frame data with one and be divided into P sub-frame data, sub-frame data is sent into arithmetic element according to sequential and is carried out pixel quantity with respect to the statistical calculation of gray value, to obtain respectively corresponding counting statistics value.Wherein, each sub-frame data number consecutively is f
tAnd each sub-frame data has M*N/P pixel, and M, N, P are that natural number and t are 1 to P natural number.
Secondly, as a sub-frame data f
tWhen sending into arithmetic element, also send in multiplier (-icator), incite somebody to action f at least via space domain filter
t-1, f
t-2The counting statistics value that produces through the parameter of weighted calculation gained can be again via the time-domain filter further with other parameters, for example f
t-3, f
t-4Through the value that computing produces, after doing the ranking operation processing, come sub-frame data f
tDo calculation process to strengthen contrast, sub-frame data f
tBe that the time-domain filter is sent into parameter on the time point of multiplier (-icator), be positioned at the sub-frame data of multiplier (-icator).
In the second embodiment of the present invention, owing to importing the time-domain filter, therefore can not store frame data with the frame data storing memory, in addition, add also using of space domain filter, not only guaranteed the continuity that data show, the parameter that can also avoid using the different frame data to produce strengthens the contrast processing and produces the problem of distortion.
Description of drawings
For above and other purpose of the present invention, feature, advantage and embodiment can be become apparent, be elaborated with reference to accompanying drawing, wherein:
Figure 1A shows in known frame data processor the block diagram of the image frame data being processed to strengthen the device of contrast;
Figure 1B shows the distribution map of gray value and the pixel quantity of the frame data of corresponding whole picture;
Fig. 2 shows and has omitted memory in known frame data processor and the image frame data are processed to strengthen the block diagram of the device of contrast;
Fig. 3 A shows the block diagram of the device that a kind of frame data of first embodiment of the invention process;
Fig. 3 B shows the frame data that will have the M*N pixel and is divided into P sub-frame data S
tSchematic diagram;
Fig. 4 A shows the block diagram of the device that a kind of frame data of second embodiment of the invention process;
Fig. 4 B shows the frame data that will have the M*N pixel and is divided into P sub-frame data f
tSchematic diagram; And
Fig. 5 shows the data processing method schematic diagram of space domain filter and time-domain filter.
[main element symbol description]
102: frame memory 302: linear memory
104: arithmetic element 304: space domain filter
106: multiplier (-icator) 306: multiplier (-icator)
202: arithmetic element 400: cutting and arithmetic element
204: time-domain filter 402: space domain filter
206: multiplier (-icator) 404: the time-domain filter
300: cutting and arithmetic element 406: multiplier (-icator)
S
1～S
p: sub-frame data S
ij: the j in i frame data
f
1～f
t: the sub-frame data sub-frame data
Embodiment
With reference to Fig. 3 A and Fig. 3 B, it shows the block diagram of the device of processing according to a kind of frame data of first embodiment of the invention simultaneously.
Fig. 3 A illustrates first embodiment of the invention, and one is applied to the frame data processing unit of display unit.As shown in Figure 3A, the frame data processing unit comprises arithmetic element 300, linear memory 302, space domain filter 304 and multiplier (-icator) 306.frame data can be sent in linear memory 302 with the form of sub-frame data successively and store, and synchronously send into arithmetic element 300 and carry out pixel quantity with respect to the statistical calculation of gray value, after linear memory 302 is filled with, the counting statistics value that arithmetic element 300 can will produce with respect to the statistics that the sub-frame data of linear memory 302 interior storages is done is sent into space domain filter 304, after the sub-frame data of isochrone memory 302 interior storages can be sent into multiplier (-icator) 304 and empty linear memory 302, repeat above-mentioned program with the counting statistics value that sub-frame data was produced of the corresponding on-line memory 302 interior storages of continuous generation.
Can do ranking operation at least two counting statistics values according to user's design in space domain filter 304 and obtain a parameter, this parameter can be sent into multiplier (-icator) 306 to corresponding sub-frame data degree of comparing adjustment.
As shown in Fig. 3 B, the frame data with M*N pixel utilize the capacity of linear memory to be divided into P sub-frame data S
p, wherein, each sub-frame data S
pHave M*N/P pixel, and M, N are natural number and P for greater than 1 natural number.Linear memory 302 can store a sub-frame data and arithmetic element 300 can be to sub-frame data S
pCarry out pixel quantity with respect to the statistical calculation of gray value, to obtain corresponding counting statistics value V
p
For instance, work as S
1When sending into simultaneously linear memory 302 and arithmetic element 300, arithmetic element 300 output sub-frame data S
1Corresponding counting statistics value V
1Enter space domain filter 304, simultaneously, sub-frame data S
1Can send into multiplier (-icator) 306.Space domain filter 304 can be done ranking operation with continuous three counting statistics values according to user's design, for example V
p-2* 0.2+V
p-1* 0.2+V
p* 0.6.Work as V
1When sending into space domain filter 304, there is no V
0And V
-1Space domain filter produces, so can produce parameter 0.6*V
1, and it is sent into 306 couples of sub-frame data S of multiplier (-icator)
1Degree of comparing is processed.Then, arithmetic element 300 output sub-frame data S
2Corresponding counting statistics value V
2Enter space domain filter 304, simultaneously, sub-frame data S
2Can send into multiplier (-icator) 306.Because there is no V
0, space domain filter 304 can produce parameter 0.6*V
2+ 0.2*V
1, and it is sent into 306 couples of sub-frame data S of multiplier (-icator)
2Degree of comparing is processed.As arithmetic element 300 output sub-frame data S
3Corresponding counting statistics value V
3Enter space domain filter 304, simultaneously, sub-frame data S
3Can send into multiplier (-icator) 306.Send into 306 couples of sub-frame data S of multiplier (-icator)
3Parameter 0.6*V according to space domain filter 304 generations
3+ 0.2*V
2+ 0.2*V
1Degree of comparing is processed.Certainly, 306 couples of sub-frame data S of multiplier (-icator)
4Parameter 0.6*V according to space domain filter 304 generations
4+ 0.2*V
3+ 0.2*V
2Degree of comparing is processed, follow-up sub-pixel S
pParameter 0.6*V according to space domain filter 304 generations
p+ 0.2*V
p-1+ 0.2*V
p-2Degree of comparing is processed.
The quantity and the corresponding weight that apply to the counting statistics value Vp of space domain filter 30 can be designed according to actual demand by the designer, above-mentioned three counting statistics values and corresponding weight are only in order to illustrate, can not therefore to limit the present invention.Therefore according to the needs on should designing, also can adopt discontinuous counting statistics value to produce the contrast processing parameter.
By the above-mentioned first embodiment of the present invention as can be known, because the data volume of subframe is only the 1/p of frame data (Frame), so the size of linear memory only needs the 1/p of known as memory device, so the space of the shared hardware of memory will significantly reduce, and the consumption of hardware resource also reduces.
In addition, the use of space domain filter makes each subframe and strengthens except the counting statistics value degree of comparing that can both utilization itself produces, outside the error of the subframe before making subframe after gain with respect to gain reduces.Each parameter that is used for processing sub-frame data has also comprised the counting statistics value that previous at least sub-frame data produces, so when each subframe was combined into a whole frame after gain, the subframe after each gain can not produce the discontinuous problem in border each other.
With reference to Fig. 4 A and Fig. 4 B, it shows another preferred embodiment according to the present invention, a kind of block diagram that is applied to the frame data processing unit of explicit device simultaneously.
Fig. 4 A shows the frame data processing unit of second embodiment of the invention.As shown in Fig. 4 A, the frame data processing unit comprises arithmetic element 400, space domain filter 402, time-domain filter 404 and multiplier (-icator) 406.Frame data can be sent into multiplier (-icator) 406 successively, and synchronously send into arithmetic element 400 and carry out pixel quantity with respect to the statistical calculation of gray value.
As shown in Figure 4 B, the frame data with M*N pixel utilize the block signal and are divided into P sub-frame data S
p, wherein each sub-frame data has M*N/P pixel, and M, N are natural number and P for greater than 1 natural number.Number of sub frames is sent to arithmetic element 400 and multiplier (-icator) 406 according to sequential.After arithmetic element 400 is read the block signal, the pixel quantity that arithmetic element 400 can be done for sub-frame data produces the counting statistics value with respect to the statistical calculation result of gray value, and send into space domain filter 402, as disclosing of the first embodiment, space domain filter 402 can compute weighted a plurality of counting statistics values according to user's design, obtains sending into time-domain filter 404 after the first parameter.Time-domain filter 404 obtains the second parameter after also can being weighted processing according to the first parameter or a plurality of the first parameter.The second parameter can be sent into the processing that 406 pairs of follow-up sub-frame datas of multiplier (-icator) strengthen contrast.
For example, set by two sub-frame data (S in space domain filter 402
1, S
2) counting statistics value (V
1, V
2) generation the first parameters R
1And two sub-frame data (S
2, S
3) counting statistics value (V
2, V
3) generation the first parameters R
2The first parameter (R
1, R
2) send into time-domain filter 404 and can produce the second parameters R '
1, the second parameters R of producing of time-domain filter 404 '
1Can be used for to the sub-frame data S in multiplier (-icator) on different time points 406
4(at this moment, arithmetic element 400 is being carried out sub-frame data S to strengthen the processing of contrast
4The statistics of grey scale pixel value).Then, two sub-frame data (S
2, S
3) counting statistics value (V
2, V
3) generation the first parameters R
2, and two sub-frame data (S
3, S
4) counting statistics value (V
3, V
4) generation the first parameters R
3The first parameter (R
2, R
3) send into time-domain filter 404 and can produce the second parameters R '
2, the second parameters R of producing of time-domain filter 404 '
2Can be used to sub-frame data S
5Strengthening contrast processes.Although, to sub-frame data S
4Or S
5Strengthening contrast, to process the second parameter use be not to be from sub-frame data S
4Or S
5Middle generation, but produce the counting statistics value that three sub-frame datas before corresponding sub-frame data produce.
Identical with the first embodiment, apply to the counting statistics value V of space domain filter 402 and time-domain filter 404
pNumber and corresponding weight can be designed according to actual demand by the designer, it is only in order to illustrate that three counting statistics values of above-mentioned use produce the second parameters, can not be therefore and restriction the present invention.Therefore according to the needs in design, also can adopt discontinuous counting statistics value to produce the contrast processing parameter.
By second preferred embodiment of the invention described above as can be known, but adopt also joining day territory filter of mode that space domain filter can carry out dividing processing to frame data.Adopt the time-domain filter linear memory in the first embodiment can be removed, and then further reduce the demand in hardware space.Thus, not only do not need memory, and frame data processor wafer dwindles, increased the market competitiveness by the consumption that reduces the hardware resource.The data processing method schematic diagram that space domain filter and time-domain filter carry out can be with reference to figure 5, wherein S
ijRepresent j sub-frame data in i frame data.
Moreover, because the use of time-domain and space domain filter, allow each sub-frame data can be through corresponding calculation, when being combined into whole frame data after making each sub-frame data through gain, the subframe after each gain can not produce border issue each other.And the gain after sub-frame data with the gain before sub-frame data compare, error each other is less, and when image switching, can not produce the phenomenon of flicker.
Although below adopted preferred embodiment to disclose the present invention; but it is not for restriction the present invention; without departing from the spirit and scope of the present invention; those skilled in the art can carry out various modifications and retouching; therefore, protection scope of the present invention is to be defined by subsidiary claim.
Claims (11)
1. display unit, it comprises at least:
Linear memory is used for storing one of a plurality of sub-frame datas in frame data;
Arithmetic element is carried out pixel quantity with respect to the statistical calculation of gray value to each sub-frame data that is stored in described linear memory, thereby is obtained a counting statistics value;
Space domain filter receives the described counting statistics value of at least two sub-frame datas, and to described counting statistics value apply corresponding weight become a ranking operation and, with as a parameter;
Multiplier (-icator) receives described parameter, and corresponding sub-frame data is strengthened the processing of contrast according to described parameter; And
Liquid crystal panel is in order to show described frame data.
2. display unit as claimed in claim 1, wherein, described counting statistics value is for accounting for the corresponding gray value of whole pixel quantities 5% and accounting for the corresponding gray value of whole pixel quantities 95%.
3. the method processed of frame data, its step comprises:
(A) with sub-frame data while input line memory and arithmetic element, wherein, described sub-frame data is divided into one of them equal portions after P part for the frame data that have a M*N pixel with, wherein, described sub-frame data has M*N/P pixel, and P is to be natural number greater than 1 natural number and M, N;
(B) arithmetic element is carried out pixel quantity with respect to the statistical calculation of gray value to described sub-frame data, to obtain a counting statistics value;
(C) space domain filter receives and stores the described counting statistics value that described arithmetic element is exported successively, and according to described counting statistics value to its apply corresponding weight become a ranking operation and, with as a parameter;
(D) multiplier (-icator) synchronously receives each sub-frame data stored by described linear memory and output, and by the corresponding parameter of described sub-frame data of described space domain filter output, described multiplier (-icator) strengthens the processing of contrast to described sub-frame data according to described parameter.
4. the method processed of frame data as claimed in claim 3, wherein, described counting statistics value is for accounting for the corresponding gray value of whole pixel quantities 5% and accounting for the corresponding gray value of whole pixel quantities 95%.
5. the method processed of frame data as claimed in claim 3, wherein, the processing of described enhancing contrast is used for realizing the lifting of the overall contrast when described frame data show.
6. display unit, it comprises at least:
Arithmetic element, it is according to the sub-frame data of sequential frames received certificate, and each sub-frame data is carried out pixel quantity with respect to the statistical calculation of gray value, to obtain a counting statistics value;
Space domain filter, it receives at least two counting statistics values, and ranking operation obtains one first parameter;
The time-domain filter, it receives at least two the first parameters, and ranking operation obtains one second parameter;
Multiplier (-icator) is synchronizeed the sub-frame data that receives described frame data with described arithmetic element, and described the second parameter, and adopts described the second parameter the sub-frame data that is positioned at described multiplier (-icator) on this time point to be strengthened the processing of contrast; And
Liquid crystal panel is in order to show described frame data.
7. display unit as claimed in claim 6, wherein, described counting statistics value is for accounting for the corresponding gray value of whole pixel quantities 5% and accounting for the corresponding gray value of whole pixel quantities 95%.
8. as display unit as described in claim 6, wherein, described multiplier (-icator) gains to the sub-frame data that is positioned at described multiplier (-icator) on this time point, the lifting of the overall contrast when realizing that described frame data show.
9. the method processed of frame data, its step comprises:
(A) arithmetic element receives a sub-frame data with frame data of M*N/P pixel successively, and each sub-frame data is carried out pixel quantity with respect to the statistical calculation of gray value, to obtain a counting statistics value, described sub-frame data is divided into one of them equal portions after P part for the frame data that have a M*N pixel with, and P is to be natural number greater than 1 natural number and M, N;
(B) space domain filter receives and stores the described counting statistics value of described arithmetic element output successively, and space domain filter selects a plurality of numerical value from the counting statistics value that has stored, respectively it is applied corresponding weight and summation, obtain one first parameter;
(C) the time-domain filter receives and stores the first parameter of described space domain filter output, and selects a plurality of numerical value from the first parameter that has stored, and respectively it is applied corresponding weight and summation, obtains one second parameter;
(D) multiplier (-icator) receives another sub-frame data stored by described linear memory and output successively, and by the second parameter of described space domain filter output, and described multiplier (-icator) utilizes described the second parameter described another sub-frame data to be strengthened the processing of contrast.
10. the method processed of frame data as claimed in claim 9, wherein, described counting statistics value is for accounting for the corresponding gray value of whole pixel quantities 5% and accounting for the corresponding gray value of whole pixel quantities 95%.
11. the method that frame data as claimed in claim 9 are processed, wherein, described multiplier (-icator) utilizes described the second parameter that described another sub-frame data is gained, the lifting of the overall contrast when realizing that described frame data show.
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| CN1472954A (en) * | 2002-07-15 | 2004-02-04 | ���ǵ�����ʽ���� | Circuit and method for improving image quality by fram correlation |
| EP1742178A2 (en) * | 2005-07-05 | 2007-01-10 | Xerox Corporation | Contrast enhancement of images |
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| CN1472954A (en) * | 2002-07-15 | 2004-02-04 | ���ǵ�����ʽ���� | Circuit and method for improving image quality by fram correlation |
| EP1742178A2 (en) * | 2005-07-05 | 2007-01-10 | Xerox Corporation | Contrast enhancement of images |
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| Title |
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| Tae Keun Kimy等.Contrast Enhancement System Using Spatially.《IEEE Trans. Consumer Electronics》.1998,第44卷(第1期),pp.82-87. * |
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