CN101527868A - Image signal processing method and related device - Google Patents
Image signal processing method and related device Download PDFInfo
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- CN101527868A CN101527868A CN200810082084A CN200810082084A CN101527868A CN 101527868 A CN101527868 A CN 101527868A CN 200810082084 A CN200810082084 A CN 200810082084A CN 200810082084 A CN200810082084 A CN 200810082084A CN 101527868 A CN101527868 A CN 101527868A
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- 238000001514 detection method Methods 0.000 claims abstract description 30
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- 238000006073 displacement reaction Methods 0.000 claims description 16
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Abstract
The invention provides an image signal processing method, a display method and a related device. One of the methods proposed by the present invention comprises: performing predetermined detection on the image signal; dividing a picture corresponding to the image signal into a plurality of areas, wherein each area comprises a plurality of pixels; and respectively calculating the statistical data of each area in the plurality of areas relative to the preset detection result to obtain a plurality of pieces of statistical data corresponding to the plurality of areas.
Description
Technical field
The present invention relates to image processing techniques, relate in particular to image-signal processing method, display packing and relevant apparatus.
Background technology
In the prior art, be that unit carries out with field or frame usually to the processing of picture signal (for example calculate, add up or displacement of analysis image, pixel value distribution scenario or the like).Yet, be the image processing mode that unit carries out with field or frame, be difficult to take into account the otherness between zones of different in the image, so regular meeting causes bad influence to the image quality of image.
For example, many existing display unit are before display video signal, and regular meeting adds captions (caption) or pattern extra view data such as (logo) in vision signal.These extra view data of adding only can appear in the regional area of entire image picture.If with field or frame is that the deinterleave that unit carries out aforementioned vision signal is handled, regular meeting causes these captions or pattern to glimmer (flicker) or the problem of marginal portion indentation.Hence one can see that, is the image processing mode that unit carries out with field or frame, can't satisfy the requirement of user to high resolution image.
Summary of the invention
Therefore one of purpose of the present invention is to provide image-signal processing method, display packing and relevant apparatus, to address the above problem.
The invention provides a kind of embodiment of image-signal processing method, it includes: picture signal is carried out predetermined detection; The pairing picture of this picture signal is divided into a plurality of zones, and wherein each zone includes a plurality of pixels; And calculate in these a plurality of zones each zone respectively about this predetermined detection result's statistics, to obtain and corresponding many statisticss in these a plurality of zones.
This specification provides a kind of embodiment of image display system, and it includes: detector is used for picture signal is carried out predetermined detection; The decision unit is used for the pairing picture of this picture signal is divided into a plurality of zones, and wherein each zone includes a plurality of pixels; Arithmetic element is coupled to this detector and this decision unit, is used for calculating respectively in these a plurality of zones each zone about this predetermined detection result's statistics, to obtain and corresponding many statisticss in these a plurality of zones; Display unit is used for showing this picture, and this display unit includes backlight assembly; And control unit, be coupled to this arithmetic element and this backlight assembly, in order to according to the pairing statistics in a specific region in these a plurality of zones, control in this backlight assembly and the corresponding part in this specific region.
Description of drawings
Fig. 1 is the block diagram after the embodiment of image signal processing apparatus of the present invention simplifies.
Fig. 2 is the flow chart of the embodiment of description image-signal processing method of the present invention.
Fig. 3 is the schematic diagram of the embodiment of multiple area dividing.
Fig. 4 is the block diagram after the embodiment of image display system of the present invention simplifies.
Fig. 5 is the flow chart of the embodiment of description method for displaying image of the present invention.
The main element symbol description
| 100 | Image |
| 110 | |
| 120 | The |
| 130 | |
| 140、440 | |
| 150 | |
| 200、500 | Flow |
| 210、220、230、240、530、540、550 | |
| 310、320、330、340、350、360 | The area dividing example |
| 400 | |
| 450 | |
| 452 | Backlight assembly |
Embodiment
Below with reference to accompanying drawing different characteristic of the present invention is described, and similar part will be represented so that explanation in the accompanying drawings with same label.
Please refer to Fig. 1, it is depicted as the block diagram of the image signal processing apparatus 100 of one embodiment of the invention.In the present embodiment, image signal processing apparatus 100 includes detector 110, decision unit 120, arithmetic element 130, control unit 140 and processing module 150.In fact, the discrete function piece in the image signal processing apparatus 100 can be realized with different circuit elements, also the part or all of functional block in the image signal processing apparatus 100 can be integrated in the one chip.In addition, the function of image signal processing apparatus 100 also available microprocessors collocation realize through the program code of suitably design.
Figure 2 shows that flow process Figure 200 of the image-signal processing method of describing one embodiment of the invention.Further specify the function mode of image signal processing apparatus 100 hereinafter with reference to flow process Figure 200.
In step 210, detector 110 can carry out predetermined detection to the picture signal that image signal processing apparatus 100 is received.In fact, the type of this predetermined detection and content can design according to the demand of reality, are not limited to certain embodiments.For example, detector 110 can detect the pixel value of the pixel in this picture signal or detect noise in this picture signal.Alleged herein pixel value can be brightness value (luminance), chroma value (chrominance), the gray value of pixel in practice, but scope of the present invention be as limit.Detector 110 also can carry out displacement detecting (motion detection) to each pixel in this picture signal, with the displacement detecting value (motion value) of calculating this pixel, or judges that whether this pixel is corresponding to rest image or the like.The displacement detecting that aforesaid detector 110 is carried out can be that field displacement detects (field motion detection), framing bit moves detection (frame motion detection) or the both implements.
In step 220, decision unit 120 can be divided into a plurality of zones with the pairing picture of this picture signal, and wherein each zone includes a plurality of pixels.For example, Fig. 3 shows the embodiment of several area dividing.In the area dividing example 310 of Fig. 3, this picture vertically is divided into 5 region R 1～R5.In area dividing example 320, this picture is divided into 6 region R 1～R6 by level.In area dividing example 330, this picture then is to be divided into 6 * 5=30 zone.In the reality, the size and shape in these a plurality of zones does not limit identical.For example, in the area dividing example 340 of Fig. 3, this picture is 3 region R 1～R3 that differ in size by vertical division.In area dividing example 350, this picture is 5 region R 1～R5 that differ in size by horizontal division.As for 360 of area dividing examples is that this picture is divided into 3 * 3=9 region R 1～R9 that differs in size.
The area dividing mode shown in Fig. 3 that note that only is part embodiment, and scope of the present invention is not limited thereto.In fact, the region shape that decision unit 120 is divided is not limited to rectangle, and the dividing mode of picture also can dynamically be adjusted along with the actual image content of this picture.For example, in one embodiment, decision unit 120 is divided into a plurality of zones according to the result of this predetermined detection with this picture, so that the pixel in the same area has close predetermined detection result.For example, decision unit 120 can be divided into different zones with dynamic image block with image block static in the picture, or the low image block of the image block that brightness in the picture is high and brightness is divided into different zones.
Then, in step 230, arithmetic element 130 can be calculated in these a plurality of zones each zone respectively about this predetermined detection result's statistics, to obtain and corresponding many statisticss in these a plurality of zones.For example, the arithmetic element 130 displacement detecting value summation, noise height, Luminance Distribution, chroma that can calculate the average pixel value in each zone, the sum of all pixels that picture displacement is arranged, the pixel statistics that distributes or the like.Certainly, arithmetic element 130 resulting statistics contents are relevant with the predetermined detection that detector 110 is carried out in step 210.
In step 240, control unit 140 can come 150 pairs of these specific regions of control treatment module to carry out predetermined image and handle according to the pairing statistics in a specific region in these a plurality of zones.Please note, alleged herein predetermined image is handled a speech, comprise the various image processing operations that can adjust correlation parameters with reference to this statistics, for example: deinterleave processing (de-interlacing), brightness/chroma are separated (Y/C separation), error image colour suppresses (false color suppression), noise suppressed (noise reduction) or color and handles (color processing) or the like.In addition, this predetermined image handle also comprise error correction process (error correction operation), (smoothingoperation) handled in smoothing or (edge enhancement operation) strengthened handling in the edge, disclosed in Taiwan patent I248759 number " image processing method and relevant apparatus thereof ".
For example, suppose that processing module 150 includes deinterlacing device, then control unit 140 can be controlled the deinterlace algorithm that this deinterlacing device carries out this specific region according to the sum of all pixels that picture displacement is arranged in this specific region.In the present embodiment, when the sum of all pixels that picture displacement is arranged in this specific region was lower than first critical value, the deinterleave processing of this specific region was implemented in interpolation computing (inter-field interpolation) between this deinterlacing devices employing field of control unit 140 meeting indications.Otherwise, when the sum of all pixels that picture displacement is arranged in this specific region was not less than this first critical value, the deinterleave that control unit 140 just can indicate this deinterlacing device to adopt field interpolation computing (intra-field interpolation) to implement this specific region was handled.Interpolation computing between above-mentioned field interpolation computing or field is well known to those skilled in the art, so do not add to give unnecessary details at this.
Because control unit 140 and processing module 150 these a plurality of statisticss of foundation, respectively these a plurality of regional compartmentalizations being carried out corresponding deinterleave handles, therefore can significantly improve in the prior art captions or pattern glimmers (flicker) or the problem of marginal portion indentation when showing, and then the image quality of lifting image.
Suppose to comprise in addition in the processing module 150 a Y/C separator, then control unit 140 can be according to the sum of all pixels that picture displacement is arranged in this specific region, the Y/C separation algorithm that decides this Y/C separator that this specific region is carried out.For example, when control unit 140 can have the sum of all pixels of picture displacement to be lower than second critical value in this specific region, control this Y/C separator and adopt 3 dimension comb type filtering operations (3Dcomb filtering) to implement the Y/C separating treatment of this specific region.Otherwise, when the sum of all pixels that picture displacement is arranged in this specific region was not less than this second critical value, this Y/C separator of 140 may command of control unit adopted 1 dimension or 2 dimension comb type filtering operations (1D/2D comb filtering) to implement the Y/C separating treatment of this specific region.
The enforcement order that note that each step among flow process Figure 200 only is an embodiment, and scope of the present invention is not limited thereto.For example, step 210 can be exchanged mutually with 220 order.
In the reality, more than the notion of disclosed subregion statistical picture testing result, also can be applicable in the field that image shows.Please refer to Fig. 4 and Fig. 5.Block diagram after the image display system 400 that Figure 4 shows that one embodiment of the invention is simplified, Fig. 5 then is a flow chart 500 of describing the method for displaying image of one embodiment of the invention.Similar with above-mentioned image signal processing apparatus 100, image display system 400 includes detector 110, decision unit 120 and arithmetic element 130 equally.In the present embodiment, image display system 400 display unit 450 that includes control unit 440 in addition and have backlight assembly 452.In the reality, display unit 450 can be liquid crystal panel, LCD screen or LCD TV.In the present embodiment, the backlight assembly 452 in the display unit 450 includes a plurality of fluorescent tubes (for example cold cathode fluorescent lamp), a plurality of light-emitting diode or both combinations.Further specify the working method of image display system 400 hereinafter with reference to flow chart 500.
Because detector 110, decision unit 120 and the working method of arithmetic element 130 in step 510,520 and 530, with aforesaid step 210,220 and 230 identical, do not repeat them here respectively.
In step 540, image display system 400 can utilize the display unit 450 with backlight assembly 452 to come the pairing picture of display image signals.
In step 550, control unit 440 can be according to the pairing statistics in a specific region in a plurality of zones of being divided by decision unit 120, controls in the backlight assembly 452 and the corresponding part in this specific region.For instance, control unit 440 can be according to the average brightness value of pixel in this specific region, controls the size with the driving voltage/drive current of corresponding cold cathode fluorescent lamp in this specific region or light-emitting diode.
In one embodiment, when the average brightness value of pixel in this specific region is lower than first preset value, control unit 440 can reduce the driving voltage/drive current with corresponding cold cathode fluorescent lamp in this specific region or light-emitting diode, to reduce the briliancy of this cold cathode fluorescent lamp or light-emitting diode.On the other hand, when the average brightness value of pixel in this specific region is higher than second preset value, 440 of control units can increase the driving voltage/drive current with corresponding cold cathode fluorescent lamp in this specific region or light-emitting diode, to promote the briliancy of this cold cathode fluorescent lamp or light-emitting diode.Thus, just can enlarge rapidly in the shown picture of display unit 450 than bright area and than the contrast between dark areas (contrast).With regard to a certain angle, this is the equal of to have promoted the reaction speed that 450 pairs of picture brightness of display unit change.
The above only is the preferred embodiments of the present invention, and all equivalences of being made within the appended claims restricted portion change and revise, and all should belong to the scope that the present invention is contained.
Claims (12)
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| CN200810082084A CN101527868A (en) | 2008-03-06 | 2008-03-06 | Image signal processing method and related device |
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| CN200810082084A CN101527868A (en) | 2008-03-06 | 2008-03-06 | Image signal processing method and related device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104657955A (en) * | 2015-03-06 | 2015-05-27 | 南京大树智能科技股份有限公司 | Displacement field iteration smoothing method of kernel function based digital image correlation method |
| CN109246405A (en) * | 2018-11-01 | 2019-01-18 | 明基智能科技（上海）有限公司 | The method of adjustment and its system of the uniformity of image tone |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104657955A (en) * | 2015-03-06 | 2015-05-27 | 南京大树智能科技股份有限公司 | Displacement field iteration smoothing method of kernel function based digital image correlation method |
| CN104657955B (en) * | 2015-03-06 | 2019-07-19 | 南京大树智能科技股份有限公司 | The displacement field iteration smoothing method of Digital Image Correlation Method based on kernel function |
| CN109246405A (en) * | 2018-11-01 | 2019-01-18 | 明基智能科技（上海）有限公司 | The method of adjustment and its system of the uniformity of image tone |
| CN109246405B (en) * | 2018-11-01 | 2021-04-20 | 明基智能科技（上海）有限公司 | Method and system for adjusting uniformity of image tone |
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