CN1384668A - Adaptive flashing-preventing method and adaptive-flashing-preventing filtering lens unit - Google Patents
Adaptive flashing-preventing method and adaptive-flashing-preventing filtering lens unit Download PDFInfo
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- CN1384668A CN1384668A CN 02108026 CN02108026A CN1384668A CN 1384668 A CN1384668 A CN 1384668A CN 02108026 CN02108026 CN 02108026 CN 02108026 A CN02108026 A CN 02108026A CN 1384668 A CN1384668 A CN 1384668A
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Abstract
The adaptive flashing-preventing method and adaptive flashing-preventing filtering lens unit is used in converting progressive scanning image data into interlaced scanning image data. The unit includes one edge segment detector and a flashing-preventing filtering lens. The method includes the following steps: receiving progressive scanning image data; performing flashing-preventing processing to edge segments with length greater than or equal to one threshold; and converting the progressive scanning image data into interlaced scanning image data before output.
Description
Technical field
The present invention relates to the anti-flicker of a kind of adaptive processing method and the anti-flicker of adaptive filtering lens unit (adaptive de-flicker filter), refer to be applied to an adaptive anti-flicker processing method and the adaptive that image data displaying is converted in the interlacing scan image data displaying process of lining by line scan especially and prevent the filtering lens unit that glimmers.
Background technology
Along with the rapid progress of manufacturing technology, PC has become people's necessary product of living, and it has powerful operation capacity, and the user can utilize it to finish the function of many other electronic products.Utilizing PC to play videodiscs such as VCD, DVD is an example, but it is too small because of the PC screen size usually, cause actual inconvenience of viewing and admiring, therefore provide a TV signal output end to utilize general domestic TV to show, become the critical function of display card in the PC.
Fig. 1 (a) is the partial function block schematic diagram of a display card (display adapter), wherein graph processing chips 10 (graphic chip) is exported pixel data digital signal to a random access storage device arranged side by side digital to analog converter (Random Access Memory Digital-to-Analog Converter, be called for short RAM DAC) 11 and one television signal encoder 12 (TV encoder), and this pixel data digital signal arranged side by side is the analog signal that can supply computer display 13 to show after the conversion of this random access storage device digital to analog converter 11.After the processing of this television signal encoder 12, can produce power supply as for this pixel data digital signal arranged side by side and look 14 anolog TV signals that show, and these anolog TV signals generally can be divided into NTSC and two kinds of specifications of PAL.
Fig. 1 (b) is the inner part function block schematic diagram of above-mentioned television signal encoder 12 (TV encoder), and wherein this pixel data digital signal arranged side by side is through data acquisition device (Data Capturedevice) 121, color space converter (Color Space Converter) 122, picture dimension adjustment and anti-scintillator (Scaler and Deflicker) 123,14 NTSC specifications that show or PAL specification TV signal are looked in powering of producing after the conversion of a NTSC/PAL encoder (NTSC/PALencoder) 124 and a digital to analog converter (Digital-to-Analog Converter) 125.
Fig. 1 (c) is the existing capability block schematic diagram of above-mentioned picture dimension adjustment and anti-scintillator 123, because in the specification of NTSC specification and PAL, the horizontal scanning line quantity of each frame (Frame) has been respectively 525 and 625, neither identical with the horizontal scanning line quantity (for example 600 or 768) of common computer display frame, therefore the image data of being exported by color space converter 122 must through picture dimension adjuster 1231 be used for be adjusted to proper level scan line quantity, and normally utilize bilinearity algorithm (bilinear algorithm) to carry out.For example, when desire is adjusted into four scan lines with five scan lines, article four, the color-values of second scan line in the scan line and the 3rd scan line must be carried out interpolative operation according to the second scan line in five scan lines, the 3rd scan line and the 3rd scan line, the 4th scan line, describe with the pixel shown in Fig. 2 (a), wherein P41 directly equals P51, P42 then equals 3 (P52)/4+1 (P53)/4, P43 then equals 2 (P53)/4+2 (P54)/4, then equals 1 (P54)/4+3 (P55)/4 as for P44.In addition, because TV is to utilize interlacing scan to come display frame, therefore horizontal scanning line quantity must be separated into Qi Tuchang (odd field) and the next staggered demonstration in bigraph field (even field) again through adjusted image data, therefore convert to when showing when having a horizontal former image data that a pixels tall only arranged with interlacing scan, this horizontal line just only can show in a certain figure field and produce so-called flicker (flicker) phenomenon, for eliminating this phenomenon, anti-scintillator 1232 just carries out one [1/4 with every received horizontal scanning line, 1/2,1/4] filter (filter) is handled, be that every horizontal scanning line all neighbouring calculated and is defined again through weights with itself horizontal scanning line by it, describe with the pixel shown in Fig. 2 (b), the color-values of the P2 that redefines will equal (P1)/4+ (P2)/2+ (P3)/4.So, these lines will all be revealed in two figure and eliminate scintillation.
But increasing (for example 768 along with the horizontal scanning line quantity of former computer display frame, article 864,, article 1024, even to 1200), the above-mentioned picture dimension adjuster 1231 required vertically degree of dwindling of carrying out will heighten, and when the adjusted size factor (scaling factor) less than about 0.7 the time, just may produce the situation of losing line, meaning promptly, a certain horizontal scanning line will be not by any new scan line institute reference that redefines, describe with the pixel shown in Fig. 2 (c), the wherein P12 P21 and the reference of P22 institute that will not be redefined, therefore the color information of P12 will be lost because of adjusted size, and, will make that image quality worsens more again through after the processing of preventing scintillator 1232.And how to improve the shortcoming of these existing means, be development main purpose of the present invention.
Summary of the invention
The present invention is the anti-flicker of an a kind of adaptive processing method, is applied to the image data displaying of lining by line scan and is converted in the process of an interlacing scan image data displaying, and it comprises the following step: receive the image data displaying of lining by line scan; In this image data displaying of lining by line scan, length is carried out an anti-flicker processing more than or equal to an edge line segment of a threshold value; And export after this image data displaying of lining by line scan is converted to this interlacing scan image data displaying.
According to above-mentioned conception, this edge line segment is a horizontal edge line segment in the anti-flicker of the adaptive of the present invention processing method.
According to above-mentioned conception, should prevent in the anti-flicker of the adaptive of the present invention processing method that it was that the combined value with this pixel picture element point chromatic value neighbouring with it is replaced again with the color-values of a pixel in this horizontal edge line segment that flicker is handled.
According to above-mentioned conception, this combined value is a linear combination value of this pixel two picture element point chromatic values neighbouring with it in the anti-flicker of the adaptive of the present invention processing method.
According to above-mentioned conception, the coefficient of this linear combination is [1/4,1/2,1/4] in the anti-flicker of the adaptive of the present invention processing method.
According to above-mentioned conception, in the anti-flicker of the adaptive of the present invention processing method is to decide length this edge line segment more than or equal to this threshold value with the following step: when the distance between the color-values of neighbor pixel is greater than a predetermined value when a pixel that reads in and on it, judge that this pixel is a marginal point; And the number that occurs continuously when the pixel that is judged as marginal point judges that described marginal point is length this edge line segment more than or equal to this threshold value during more than or equal to this threshold value.
According to above-mentioned conception, in the anti-flicker of the adaptive of the present invention processing method is to determine length this edge line segment more than or equal to this threshold value with the following step: when the distance between the color-values of a pixel that reads in and its time neighbor pixel during greater than a predetermined value, judge that this pixel is a marginal point; And the number that occurs continuously when the pixel that is judged as marginal point judges that described marginal point is length this edge line segment more than or equal to this threshold value during more than or equal to this threshold value.
According to above-mentioned conception, this image data displaying of lining by line scan is to handle through the following step before carrying out this anti-flicker processing in the anti-flicker of the adaptive of the present invention processing method: the color-values of a pixel in the image data displaying that this is lined by line scan, again a combined value that is adjacent picture element point chromatic value with this pixel is replaced, and then obtains the image data displaying of lining by line scan handled once the obfuscation filter; And will be somebody's turn to do the image data displaying of handling through the obfuscation filter of lining by line scan and carry out a picture dimension and adjust computing, and then obtain the image data displaying of lining by line scan once the obfuscation filter is handled and picture dimension is readjusted.
According to above-mentioned conception, this combined value is a linear combination value of this pixel two picture element point chromatic values neighbouring with it in the anti-flicker of the adaptive of the present invention processing method.
According to above-mentioned conception, the coefficient of this linear combination is [1/4,1/2,1/4] in the anti-flicker of the adaptive of the present invention processing method.
Another aspect of the present invention is the anti-flicker of an a kind of adaptive filtering lens unit, being applied to the image data displaying of lining by line scan is converted in the process of an interlacing scan image data displaying, it comprises: an edge line segment detector, receive the image data displaying of lining by line scan, it sends a useful signal according to a length more than or equal to the appearance of the edge line segment of a threshold value; And an anti-flicker filter, being electrically connected on this edge line segment detector, it carries out an anti-flicker with this edge line segment and handles back output according to this useful signal.
According to above-mentioned conception, this edge line segment detector is a horizontal scanning line and the adjacent level scan line on it that reads in this image data displaying of lining by line scan in the anti-flicker of the adaptive of the present invention filtering lens unit, when a pixel in this horizontal scanning line that reads in and when distance between neighbor pixel is greater than a predetermined value on it, just judge that this pixel is a marginal point, and the number that occurs continuously when the pixel that is judged as marginal point judges that just described marginal point is this edge line segment during more than or equal to this threshold value.
According to above-mentioned conception, this edge line segment detector is a horizontal scanning line and its following adjacent level scan line that reads in this image data displaying of lining by line scan in the anti-flicker of the adaptive of the present invention filtering lens unit, when the distance between neighbor pixel is greater than a predetermined value when a pixel in this horizontal scanning line that reads in and under it, just judge that this pixel is a marginal point, and the number that occurs continuously when the pixel that is judged as marginal point judges that just described marginal point is this edge line segment during more than or equal to this threshold value.
According to above-mentioned conception, should anti-flicker filter be that two picture element point chromatic values neighbouring with it of the pixel in this edge line segment are carried out computing and draw a linear combination value in the anti-flicker of the adaptive of the present invention filtering lens unit, and according to the triggering of this useful signal, the coefficient of this linear combination is by [0,1,0] changes [1/4,1/2,1/4] into.
According to above-mentioned conception, the coefficient of this linear combination is to be stored in the buffer in the anti-flicker of the adaptive of the present invention filtering lens unit.
Description of drawings
Fig. 1 (a) is the partial function block schematic diagram of a display card;
Fig. 1 (b) is the part function block schematic diagram of television signal encoder inside;
Fig. 1 (c) is the existing capability block schematic diagram of picture dimension adjustment and anti-scintillator;
Fig. 2 (a) is the schematic diagram of bilinearity algorithm;
Fig. 2 (b) is the schematic diagram of anti-flicker computing;
Fig. 2 (c) produces the schematic diagram of losing line in the bilinearity algorithm;
Fig. 3 (a) is that the present invention develops the preferred embodiment function block schematic diagram that;
Fig. 3 (b) is the preferred embodiment function block schematic diagram of obfuscation filtering lens unit of the present invention;
Fig. 3 (c) is the schematic diagram that carries out the obfuscation computing in the obfuscation filtering lens unit of the present invention;
Fig. 4 is the function block schematic diagram of the preferred embodiment of the anti-flicker of adaptive filtering lens unit among the present invention;
Fig. 5 is the pixel schematic diagram of horizontal scanning line among the present invention.
Embodiment
Fig. 3 (a) be the present invention the function block schematic diagram of preferred embodiment, wherein the image data displaying of being imported by color space converter 322 of lining by line scan is earlier received and handles by an obfuscation filtering lens unit (blurring filter) 323, it mainly is the color-values with each pixel in this image data displaying of lining by line scan, again a combined value that is adjacent picture element point chromatic value with this pixel is replaced, and then obtain the image data displaying of lining by line scan handled once the obfuscation filter, to be somebody's turn to do the image data displaying of handling through the obfuscation filter of lining by line scan by picture dimension adjuster 324 subsequently carries out picture dimension and readjusts, and then the effect by the anti-flicker of adaptive filtering lens unit 325, export after being converted to an interlacing scan image data displaying by follow up device more at last.
Fig. 3 (b) is the function block schematic diagram of the preferred embodiment of above-mentioned obfuscation filtering lens unit 323, it mainly is by two line buffers 3231,3232 constitute, it is respectively in order to store two horizontal scanning lines of this image data displaying of lining by line scan, and then each received bar horizontal scanning line carried out one [1/4,1/2,1/4] filter (filter) is handled (certainly, above-mentioned coefficient can change according to actual demand), be that each bar horizontal scanning line all neighbouring calculated through weights and redefines with a linear combination value with itself horizontal scanning line by it, describe with the pixel shown in Fig. 3 (c), the color-values of the P2 ' that redefines will equal (P1)/4+ (P2)/2+ (P3)/4.So, the new horizontal scanning line that produces of each bar is all mixed the color-values of neighbouring scan line, even therefore the vertically degree of dwindling of follow-up picture dimension adjuster 324 heightens and produces when losing the line situation, the color information of losing line still partly is stored in the neighbouring scan line, in order to guarantee to dwindle the image quality of back image.
When converting the interlacing scan image data displaying to, produce the phenomenon of flicker (flicker) for fear of image, still need again through anti-flicker processing through the image data displaying of lining by line scan that the obfuscation filter is handled and picture dimension is readjusted, but if handle by existing anti-scintillator, each bar horizontal scanning line all can be made once that by fuzzy image quality worsens more again, for addressing this problem, the present invention proposes the anti-flicker of adaptive filtering lens unit 325.
Fig. 4 is the preferred embodiment function block schematic diagram of the anti-flicker of adaptive filtering lens unit 325, wherein the first edge line segment detector 3251 and the second edge line segment detector 3252 read in a horizontal scanning line respectively and adjacent level scan line and this horizontal scanning line and adjacent level scan line under it on it, when a pixel in this horizontal scanning line that reads in and neighbor pixel or its when the distance between the neighbor pixel color-values is greater than a predetermined value down on it, just judge that this pixel is a marginal point, and the number that occurs continuously when the pixel that is judged as marginal point judges that just described marginal point is an edge line segment during more than or equal to a threshold value.Therefore, when this edge line segment is admitted to anti-flicker filter 3253, in order to storativity value [a0, a1, a2] buffer 3254 just by [0,1,0] is rewritten as [1/4,1/2,1/4], handle (being about to each bar horizontal scanning line is all redefined with a linear combination value by its neighbouring calculating through weights with itself horizontal scanning line) in order to this edge line segment is carried out an anti-flicker, otherwise, when other pixel that is not judged as the edge line segment is admitted to anti-flicker filter 3253, the value of buffer then will be maintained at [0,1,0] realizes not producing the effect of effect, and then finish the technological means of only preventing the flicker processing more than or equal to the edge line segment of this threshold value at length, so, other can skip over this anti-flicker processing and can keep its original image quality with regard to the pixel that scintillation can not take place originally.
Fig. 5 is the pixel schematic diagram of above-mentioned horizontal scanning line, below equals 11 for example with regard to threshold value, and further specifying marginal point how to judge continuous appearance is the method for an edge line segment.We are provided with a width is 11 sliding window (sliding window), therefore the pixel when sliding window central authorities is a marginal point, and it is when each side 5 pixels are all marginal point, the pixel of these sliding window central authorities just is confirmed as a bit in this edge line segment, and can determine further that this edge line segment has 11 pixels at least.Therefore, when among the figure the 9th o'clock when the 22nd is all marginal point, utilize above-mentioned sliding window to detect after, just can determine at the 15th, 16,17 and be this edge line segment, and determine that further this edge line segment has at least 14 pixels long.
In sum; the television signal encoder of the present invention on can applying to the PC display card; the clock pulse frequency that also can be applied to external circuit is than in unsettled other the similar circuit structure of the clock pulse frequency of internal circuit; so the present invention can carry out various variations and modification easily by the those of ordinary skill in the industry, and the protection range that does not all break away from claims and defined.
Claims (10)
1. the anti-flicker of adaptive processing method is applied to the image data displaying of lining by line scan and is converted in the process of an interlacing scan image data displaying, it is characterized in that comprising the following step:
Receive the image data displaying of lining by line scan;
In this image data displaying of lining by line scan, length is carried out an anti-flicker processing more than or equal to an edge line segment of a threshold value; And
Export after this image data displaying of lining by line scan is converted to this interlacing scan image data displaying.
2. the anti-flicker of adaptive as claimed in claim 1 processing method, it is characterized in that described edge line segment is a horizontal edge line segment, the processing of should anti-ly glimmering is the color-values with a pixel in this horizontal edge line segment, again the combined value with this pixel picture element point chromatic value neighbouring with it is replaced, this combined value is a linear combination value of this pixel two picture element point chromatic values neighbouring with it, the coefficient of this linear combination is [1/4,1/2,1/4].
3. the anti-flicker of adaptive as claimed in claim 1 processing method is characterized in that it being to decide length this edge line segment more than or equal to described threshold value with the following step:
When the distance between the color-values of neighbor pixel is greater than a predetermined value when a pixel that reads in and on it, judge that this pixel is a marginal point; And
The number that occurs continuously when the pixel that is judged as marginal point judges that described marginal point is length this edge line segment more than or equal to this threshold value during more than or equal to this threshold value.
4. the anti-flicker of adaptive as claimed in claim 1 processing method is characterized in that it being to decide length this edge line segment more than or equal to this threshold value with the following step:
When a pixel that reads in and its when the distance between the color-values of neighbor pixel is greater than a predetermined value down, judge that this pixel is a marginal point; And
The number that occurs continuously when the pixel that is judged as marginal point judges that described marginal point is length this edge line segment more than or equal to this threshold value during more than or equal to this threshold value.
5. the anti-flicker of adaptive as claimed in claim 1 processing method is characterized in that the described image data displaying of lining by line scan is to handle through the following step before carrying out this anti-flicker processing:
With the color-values of a pixel in this image data displaying of lining by line scan, a combined value that is adjacent picture element point chromatic value with this pixel is replaced again, and then obtains the image data displaying of lining by line scan handled once the obfuscation filter; And
This image data displaying of handling through the obfuscation filter of lining by line scan is carried out a picture dimension adjust computing, and then obtain the image data displaying of lining by line scan once the obfuscation filter is handled and picture dimension is readjusted.
6. as the anti-flicker of the 5th described adaptive of claim scope processing method, wherein this combined value is a linear combination value of this pixel two picture element point chromatic values neighbouring with it, and the coefficient of this linear combination is [1/4,1/2,1/4].
7. the anti-flicker of adaptive filtering lens unit is applied to the image data displaying of lining by line scan and is converted in the process of an interlacing scan image data displaying, and it comprises:
One edge line segment detector receives the image data displaying of lining by line scan, and it sends a useful signal according to a length more than or equal to the appearance of the edge line segment of a threshold value; And
One anti-flicker filter is electrically connected on this edge line segment detector, and it carries out an anti-flicker with this edge line segment and handle back output according to this useful signal.
8. the anti-flicker of adaptive as claimed in claim 7 filtering lens unit, it is characterized in that described edge line segment detector reads in a horizontal scanning line and the adjacent level scan line on it in this image data displaying of lining by line scan, when a pixel in this horizontal scanning line that reads in and when distance between neighbor pixel is greater than a predetermined value on it, just judge that this pixel is a marginal point, and the number that occurs continuously when the pixel that is judged as marginal point judges that just described marginal point is this edge line segment during more than or equal to this threshold value.
9. the anti-flicker of adaptive as claimed in claim 7 filtering lens unit, it is characterized in that described edge line segment detector reads in a horizontal scanning line and its following adjacent level scan line in this image data displaying of lining by line scan, when the distance between neighbor pixel is greater than a predetermined value when a pixel in this horizontal scanning line that reads in and under it, just judge that this pixel is a marginal point, and the number that occurs continuously when the pixel that is judged as marginal point makes and judges that described marginal point is this edge line segment during more than or equal to this threshold value.
10. the anti-flicker of adaptive as claimed in claim 7 filtering lens unit, it is characterized in that described should anti-flicker filter be that two picture element point chromatic values neighbouring with it of the pixel in this edge line segment are carried out computing and draw a linear combination value, and according to the triggering of this useful signal, the coefficient of this linear combination is by [0,1,0] changes [1/4,1/2 into, 1/4], the coefficient of this linear combination is to be stored in the buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02108026 CN1203672C (en) | 2002-03-22 | 2002-03-22 | Adaptive flashing-preventing method and adaptive-flashing-preventing filtering lens unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02108026 CN1203672C (en) | 2002-03-22 | 2002-03-22 | Adaptive flashing-preventing method and adaptive-flashing-preventing filtering lens unit |
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| Publication Number | Publication Date |
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| CN1384668A true CN1384668A (en) | 2002-12-11 |
| CN1203672C CN1203672C (en) | 2005-05-25 |
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| CN 02108026 Expired - Lifetime CN1203672C (en) | 2002-03-22 | 2002-03-22 | Adaptive flashing-preventing method and adaptive-flashing-preventing filtering lens unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431612B (en) * | 2007-11-08 | 2012-06-20 | 鸿富锦精密工业（深圳）有限公司 | Anti-flicker apparatus and method |
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2002
- 2002-03-22 CN CN 02108026 patent/CN1203672C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431612B (en) * | 2007-11-08 | 2012-06-20 | 鸿富锦精密工业（深圳）有限公司 | Anti-flicker apparatus and method |
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| CN1203672C (en) | 2005-05-25 |
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