CN101453556A - Method and apparatus for eliminating image blurring by pixel based processing - Google Patents
Method and apparatus for eliminating image blurring by pixel based processing Download PDFInfo
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- CN101453556A CN101453556A CNA2007101967638A CN200710196763A CN101453556A CN 101453556 A CN101453556 A CN 101453556A CN A2007101967638 A CNA2007101967638 A CN A2007101967638A CN 200710196763 A CN200710196763 A CN 200710196763A CN 101453556 A CN101453556 A CN 101453556A
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Abstract
The invention relates to a method for eliminating image blurring, which comprises: performing mobile detection on two pixels which are positioned in corresponding positions of two continuous images of a video respectively, so as to generate a detection result; and adjusting the brightness of the two pixels according to the detection result, wherein one pixel is brightened and the other pixel is darkened when the detection result indicates that the two pixels belong to dynamic images.
Description
Technical field
The present invention relates to keep the settling mode of mobile image blurring (the motion image blur) of type display unit (hold type display device), especially relate to by processing (pixel-based processing) and come the fuzzy method and apparatus of removal of images based on pixel.
Background technology
For keeping type display unit (hold type display device), for example: active matrix liquid crystal display (active matrix liquid crystal display, AMLCD), move image blurring (motion image blur) subject under discussion for coming into question widely.Moving the image blurring origin cause of formation comprises: slow excessively liquid crystal reaction time, the capacitance variations of pixel and so-called " take a sample and keep false shadow " (sample and hold artifact).
According to known technology, the above two all can solve by utilizing voltage overdrive methods such as (voltage overdrive).Yet, the latter is owing to be the combination of level and smooth moving tracing (smooth motion tracking) characteristic of the sampling characteristic of described active matrix liquid crystal display and user's vision system, be difficult for processing, so still be present in LCD on the market widely.In the known technology about sampling with keep the solution and the imperfection of false shadow.For example in a known solution, destroy visual sense of continuity by the data that off and on data of a part of image are substituted by all black picture, in the hope of destroying sampling and the effect of keeping false shadow.Again for example in another known solution, by off and on the backlight liquid crystal display power-off being destroyed visual sense of continuity, in the hope of destroying sampling and the effect of keeping false shadow.Yet described known solution all can have the problem of image deepening.
In addition, the solution that known technology provided often needs quite complicated controlling mechanism and expends quite high research and development/manufacturing cost, therefore is unfavorable for importing product on the market.
Summary of the invention
Therefore one of purpose of the present invention is to provide and is used for the fuzzy method and apparatus of removal of images, to address the above problem.
Another object of the present invention is to provide be used for the fuzzy method and apparatus of removal of images, keep the problem of mobile image blurring (the motion image blur) of type display unit (hold type display device) with solution.
Another object of the present invention is to provide be used for the fuzzy method and apparatus of removal of images, the sampling that comes the shown image of processes and displays device with keep false shadow (sample and hold artifact).
A kind of fuzzy method of removal of images that is used for is provided in the preferred embodiment of the present invention.This method includes: two pixels of the opposite position of two consecutive images laying respectively at a video are moved detect to produce a testing result; And adjust the brightness of these two pixels according to this testing result, wherein when this testing result points out that these two pixels belong to dynamic image, then the pixel in these two pixels is lightened, and another pixel is dimmed.
The present invention also provides a kind of fuzzy device of removal of images that is used for accordingly when said method is provided.This device comprises a moving detector and and adjusts circuit, and wherein this adjustment circuit is coupled to this moving detector.This moving detector is used for two pixels of the opposite position of two consecutive images that lay respectively at a video are moved detection to produce a testing result.This adjustment circuit is used for adjusting according to this testing result the brightness of these two pixels, wherein when this testing result points out that these two pixels belong to dynamic image, then the pixel in these two pixels is lightened, and another pixel is dimmed.
Description of drawings
A kind of the be used for removal of images fuzzy schematic representation of apparatus of Fig. 1 for being provided according to one first embodiment of the present invention.
Fig. 2 shows device shown in Figure 1 implementation detail in one embodiment, and wherein present embodiment is that one of this first embodiment changes example.
Fig. 3 shows that one of this first embodiment changes in the example, adjustment circuit shown in Figure 1 can utilize the schematic diagram of the transfer function of (utilize).
Fig. 4 shows device shown in Figure 1 implementation detail in another embodiment, and wherein present embodiment is that another of this first embodiment changes example, and it is routine also be that one of embodiment shown in Figure 2 changes.
A kind of the be used for removal of images fuzzy schematic representation of apparatus of Fig. 5 for being provided according to one second embodiment of the present invention, wherein this second embodiment be this first embodiment another changes routinely, also is variation example embodiment illustrated in fig. 4.
Fig. 6 is the dynamic adjustment shown in Figure 5 and the schematic diagram of reaction time accelerating module.
The reference numeral explanation
| 100，200 | The device that removal of images is fuzzy |
| 110，210 | Pixel is engine relatively |
| 120 | Adjust |
| 122 | The still image table of |
| 124 | The dynamic image table of |
| 126 | |
| 128 | |
| 130 | The reaction |
| 140 | |
| 150 | The |
| 200M | Dynamically adjust and the reaction time accelerating module |
| C0，C1，C2 | Transfer function |
Embodiment
Please refer to Fig. 1, a kind of schematic diagram that be used for removal of images fuzzy device 100 of Fig. 1 for being provided according to one first embodiment of the present invention, wherein the device 100 of present embodiment can be arranged at one and keep type display unit (hold type display device), for example: active matrix liquid crystal display (active matrixliquid crystal display, AMLCD), and can be used to eliminate this and keep the image blurring of type display unit, especially can eliminate above-mentioned sampling and keep false shadow (sample and hold artifact).
According to present embodiment, (motion index, MI) represent by the state of MI by mobile index shown in Figure 1 for this testing result.So, be loaded with the running of the mobile index MI may command adjustment circuit 120 of this testing result.When this testing result pointed out that these two pixels belong to dynamic image, mobile index MI (for example: logical value 1) was in one first state; Under this situation, adjusting circuit 120 can lighten a pixel in these two pixels, and one other pixel is dimmed, and uses the moving tracing (motion tracking) that interrupts user's vision system, to avoid producing image blurring sensation.On the contrary, when this testing result pointed out that these two pixels belong to still image, mobile index MI (for example: logical value 0) was in one second state; Under this situation, adjust circuit 120 and can carry out identical gamma (GAMMA) conversion these two pixels.Change in the example at one of present embodiment, when this testing result points out that these two pixels belong to still image, adjust circuit 120 and can't carry out any adjustment these two pixels.
Because sampling is closely bound up with the origin cause of formation and the visual sense of continuity of keeping false shadow, and the visual sense of continuity of mechanism meeting destruction is adjusted in above-mentioned brightness, and when adjusting brightness, optionally carry out the adjustment of light and dark at per two images that transmit continuously, so the present invention can eliminate above-mentioned sampling by this and keep false shadow, and mean flow rate can be kept the due brightness of image, can not cause having as known technology the problem of image deepening.
Fig. 2 shows device shown in Figure 1 100 implementation detail in one embodiment, and wherein present embodiment is that one of this first embodiment changes example.As shown in Figure 2, device 100 also comprises an external memory storage 140, is used for temporarily storing the view data of this video.In the present embodiment, external memory storage 140 be Synchronous Dynamic Random Access Memory (Synchronous Dynamic Random Access Memory, SDRAM).
Last data PRE_DATA shown in Figure 2 and present data CURR_DATA represent the pixel data of two consecutive images respectively.For example: when the pixel data of present data CURR_DATA representative frame F (n), last data PRE_DATA is with regard to the pixel data of representative frame F (n-1).In addition, adjusted present data CURR_DATA_ADJ represents the result of present data CURR_DATA after adjusting circuit 120 processing.
According to present embodiment, adjustment circuit 120 comprises a plurality of tables of comparisons, and (look-up table LUT), can finish the brightness of adjusting this video by tabling look-up.As shown in Figure 2, these a plurality of tables of comparisons comprise a still image table of comparisons 122 and at least one dynamic image table of comparisons 124.When this testing result points out that these two pixels belong to still image, adjust circuit 120 is adjusted these two pixels by the queries static image table of comparisons 122 brightness; When this testing result points out that these two pixels belong to dynamic image, adjust circuit 120 is adjusted these two pixels by the inquiry dynamic image table of comparisons 124 brightness.
As shown in Figure 2, adjust circuit 120 and also comprise a multiplexer 128.The multiplexer 128 of present embodiment is according to this testing result of mobile index MI representative, from these two adjusted pixel datas of pixel that utilize the still image table of comparisons 122 gained with utilize in these two adjusted pixel datas of pixel of the dynamic image table of comparisons 124 gained, select one as the output of adjusting circuit 120.So, by the selection running of multiplexer 128, the adjustment circuit 120 of present embodiment can utilize the still image table of comparisons 122 or the dynamic image table of comparisons 124 to adjust the brightness of these two pixels.
In the present embodiment, the content in the described table of comparisons (being numerical value/data) representative " transfer function ".The still image table of comparisons 122 has the data of representing a transfer function, and for adjusting these two pixels, for example: the still image table of comparisons 122 includes the contrast tabular value of representative function C0.In addition, the dynamic image table of comparisons 124 has the data of representing two different transfer functions, for adjusting these two pixels, for example: the dynamic image table of comparisons 124 includes the contrast tabular value of representative function C1 and the contrast tabular value of representative function C2, wherein function C 2 is used for lightening the brightness of image, and function C 1 is used for dimming the brightness of image.
Fig. 3 shows that one of this first embodiment changes in the example, the schematic diagram of adjustment circuit 120 available transfer functions shown in Figure 1.The curve shape of each function C 0, C1 and C2 shown in this variation example for the example in many may the variation, is not to be used for limiting the scope of the invention only.For example: in another variation example of this first embodiment, the curve shape of function C 0 and non-rectilinear.
According to another variation example of this first embodiment, two transfer functions that the dynamic image table of comparisons 124 is provided are selected from the predetermined transfer function of a group.Especially in this variation example, the described transfer function that this transfer function that the still image table of comparisons 122 is provided and the dynamic image table of comparisons 124 are provided is the gamma conversion function, and wherein each transfer function is corresponding to a gamma value.
For example: when this testing result points out that these two pixels belong to still image, adjust the same transfer function that circuit 120 utilizes corresponding to identical gamma value GAMMA0, as the adjustment mechanism in two consecutive images, wherein gamma value GAMMA0 is between two gamma value GAMMA1 and GAMMA2 respectively; So, adjust (default) gamma conversion that circuit 120 utilizes same gamma value GAMMA0 that the pixel that belongs to still image among frame F (n) and the F (n+1) is preset.
On the other hand, when this testing result points out that these two pixels belong to dynamic image, adjust circuit 120 and utilize corresponding to different gamma value GAMMA1 and the transfer function of GAMMA2, respectively as the adjustment mechanism in two consecutive images; So, adjust circuit 120 and can utilize gamma value GAMMA2 that the pixel that belongs to dynamic image among the frame F (n) is lightened respectively, and utilize gamma value GAMMA1 that the pixel that belongs to dynamic image among the frame F (n+1) is dimmed respectively.
Fig. 4 shows device shown in Figure 1 100 implementation detail in another embodiment, and wherein present embodiment is that another of this first embodiment changes example, and it is routine also be that one of embodiment shown in Figure 2 changes.As shown in Figure 4, adjust circuit 120 and also comprise a gain adjusting unit 126.About gain adjusting unit 126 in adjusting circuit 120 below function that the path provided further specify as follows.
In the present embodiment, two transfer functions that the dynamic image table of comparisons 124 is provided are selected from the predetermined transfer function of a group, and each predetermined transfer function is corresponding to a predetermined gain adjustment amount.The gain adjusting unit 126 of present embodiment is adjusted gain according to a predetermined gain adjustment amount G in the back of tabling look-up, to adjust the brightness of this video; Device 100 also comprises a decision unit 150, be respectively different frame F (N) (N=0,1 ..., n, (n+1) ...) and amount of gain adjustment G that decision is fit to, use for gain adjusting unit 126, so amount of gain adjustment G also can be write as amount of gain adjustment G
NIn the present embodiment, the employed amount of gain adjustment of two continuous frames G for example
nWith G
N+1Can correspond to each other, make the contrast tabular value and the amount of gain adjustment G of function C 2
nBe combined into function (G
nC2), and the contrast tabular value of function C 1 and amount of gain adjustment G *
N+1Be combined into function (G
N+1* C1).
The decision unit 150 of present embodiment can be controlled according to the frame characteristic and adjust circuit 120 select two predetermined transfer functions in described predetermined transfer function, when pointing out that when this testing result these two pixels belong to dynamic image as this two transfer function.In the present embodiment, above-mentioned frame characteristic is corresponding to the mobile degree of at least one object in the detected image.On real the work, this moves mobile range, the translational speed of this object or the motion-vector of this object that degree can be this object.
As shown in Figure 4, in the present embodiment, device 100 also comprises a reaction time accelerating circuit (Response Time Enhancement Circuit, RTE Circuit) 130, be used for (the Overdrive that optionally overdrives, OD) handle, wherein extremely drive data OD_DATA represents the pixel data that reaction time accelerating circuit 130 is exported.A plurality of assemblies in the device 100 of present embodiment, for example: pixel relatively engine 110, adjust circuit 120, with reaction time accelerating circuit 130, be integrated in a chip.On real the work, the described table of comparisons utilizes embedded memory (Embedded Memory) and the corresponding memory access control circuit in this chip to implement.
Above-mentioned mobile index MI can control simultaneously and adjust circuit 120 and reaction time accelerating circuit 130.When this testing result pointed out that these two pixels belong to dynamic image, mobile index MI (for example: logical value 1) was in this first state; Under this situation, reaction time accelerating circuit 130 starts these processing of overdriving, for example to the processing of overdriving of these two pixels.On the contrary, when this testing result pointed out that these two pixels belong to still image, mobile index MI (for example: logical value 0) was in this second state; Under this situation, reaction time accelerating circuit 130 cuts out this processing of overdriving.
In addition, change example according to one of present embodiment, correspond respectively to redness, green, with the transfer function of blue color channel (R/G/B color channel) and inequality, and the adjustment circuit 120 in this variations example respectively according to corresponding to red, green, and the transfer function of respectively organizing of blue color channel operate.
Please refer to Fig. 5 and Fig. 6.A kind of schematic diagram that be used for removal of images fuzzy device 200 of Fig. 5 for being provided according to one second embodiment of the present invention, Fig. 6 then is dynamic adjustment shown in Figure 5 and the schematic diagram of reaction time accelerating module (Dynamic Adjustment and Response Time EnhancementModule, Dynamic Adjustment and RTE Module) 200M.This second embodiment is a variation example embodiment illustrated in fig. 4, and its Discrepancy Description is as follows.In this second embodiment, the data path of last data PRE_DATA compares engine 210 without pixel, as Fig. 5 and shown in Figure 6.According to this structure, pixel is engine 210 more present data CURR_DATA and next data NEXT_DATA relatively.For example: last data PRE_DATA, at present data CURR_DATA, with next data NEXT_DATA correspond respectively to frame F (n-1), F (n), with the frame data of F (n+1).Owing to be coupled to before present data CURR_DATA that the display unit of device 200 is ready to show disposed by device 200, next data NEXT_DATA has begun access to plant 200 for relatively, so present embodiment can be adjusted present data CURR_DATA according to next data NEXT_DATA in real time.
Compared to embodiment shown in Figure 4, device 200 can carry out simultaneously last data PRE_DATA, at present data CURR_DATA, to utilize the still image table of comparisons 122 or utilize the dynamic image table of comparisons 124 so that dynamically determine with comparison between next data NEXT_DATA, and by reaction time accelerating circuit 130 adjusted present data CURR_DATA_ADJ is further handled at once and produce extremely drive data OD_DATA, show in real time for this display unit.
One of benefit of the present invention is that method and apparatus provided by the present invention can come removal of images fuzzy by the processing based on pixel, especially eliminates sampling and keeps false shadow.Therefore, by adjustment of the present invention, the image that the user watched does not have the problem of luminance distortion or luminance shortage.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (18)
1. one kind is used for the fuzzy method of removal of images, and it includes:
Two pixels of the opposite position of two consecutive images that lay respectively at a video are moved detect to produce a testing result; And
Adjust the brightness of these two pixels according to this testing result, wherein when this testing result points out that these two pixels belong to dynamic image, then the pixel in these two pixels is lightened, and another pixel is dimmed.
2. the method for claim 1, wherein adjust in the step of brightness of these two pixels according to this testing result, when this testing result points out that these two pixels belong to dynamic image, adjust the brightness of these two pixels by inquiring about a dynamic image table of comparisons.
3. method as claimed in claim 2, wherein this dynamic image table of comparisons has the data of representing two transfer functions, and a transfer function in these two transfer functions is used for lightening the brightness of image, and another transfer function is used for dimming the brightness of image.
4. method as claimed in claim 3, wherein these two transfer functions are selected from the predetermined transfer function of a group.
5. method as claimed in claim 4, wherein said transfer function are the gamma conversion function, and each transfer function is corresponding to a gamma value.
6. the method for claim 1, wherein adjust in the step of brightness of these two pixels according to this testing result, when this testing result points out that these two pixels belong to still image, adjust the brightness of these two pixels by inquiring about a still image table of comparisons.
7. method as claimed in claim 6, wherein this still image table of comparisons has the data of representing a gamma conversion function.
8. the method for claim 1 also comprises:
According to this testing result, to the processing of overdriving of these two pixels.
9. one kind is used for the fuzzy device of removal of images, and it includes:
One moving detector is used for two pixels to the opposite position of two consecutive images laying respectively at a video to move and detect to produce a testing result; And
One adjusts circuit, be coupled to this moving detector, be used for adjusting the brightness of these two pixels, wherein when this testing result points out that these two pixels belong to dynamic image according to this testing result, then a pixel in these two pixels is lightened, and one other pixel is dimmed.
10. device as claimed in claim 9, wherein this adjustment circuit comprises a dynamic image table of comparisons, and this adjustment circuit can be adjusted the brightness of these two pixels by inquiring about this dynamic image table of comparisons.
11. device as claimed in claim 10, wherein this dynamic image table of comparisons has the data of representing two transfer functions, and a transfer function in these two transfer functions is used for lightening the brightness of image, and another transfer function is used for dimming the brightness of image.
12. device as claimed in claim 11, wherein these two transfer functions are selected from the predetermined transfer function of a group.
13. device as claimed in claim 12, wherein said transfer function are the gamma conversion function, and each transfer function is corresponding to a gamma value.
14. device as claimed in claim 10, wherein this adjustment circuit also comprises a still image table of comparisons, and this adjustment circuit can be adjusted the brightness of these two pixels by inquiring about this still image table of comparisons.
15. device as claimed in claim 14, wherein this still image table of comparisons has the data of representing a gamma conversion function.
16. device as claimed in claim 14, wherein this adjustment circuit also includes:
One multiplexer, couple this moving detector, this dynamic image table of comparisons and this still image table of comparisons, be used for according to this testing result, from these two adjusted pixel datas of pixel that utilize this still image table of comparisons gained with utilize in these two adjusted pixel datas of pixel of this dynamic image table of comparisons gained, select one to adjust the output of circuit as this.
17. device as claimed in claim 10 also comprises:
One decision unit is in order to determine a yield value; And
One gain adjusting unit is coupled to output and this decision unit of this dynamic image table of comparisons, in order to adjust the dateout of this dynamic image table of comparisons according to this yield value.
18. device as claimed in claim 9, wherein this moving detector and this adjustment are circuit integrated in a chip; This device also includes:
One external memory storage is coupled to this moving detector, is used for temporarily storing the view data of this video.
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|---|---|---|---|
| CN2007101967638A CN101453556B (en) | 2007-12-06 | 2007-12-06 | Method and apparatus for eliminating image blurring by pixel based processing |
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|---|---|---|---|
| CN2007101967638A CN101453556B (en) | 2007-12-06 | 2007-12-06 | Method and apparatus for eliminating image blurring by pixel based processing |
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| CN101453556B CN101453556B (en) | 2012-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836937A (en) * | 2014-02-12 | 2015-08-12 | 瑞昱半导体股份有限公司 | Processing method for performing dynamic image smoothing by utilizing overvoltage drive function, and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836937A (en) * | 2014-02-12 | 2015-08-12 | 瑞昱半导体股份有限公司 | Processing method for performing dynamic image smoothing by utilizing overvoltage drive function, and method |
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