CN100512435C - Image decoding display method and system - Google Patents
Image decoding display method and system Download PDFInfo
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- CN100512435C CN100512435C CNB2006101127448A CN200610112744A CN100512435C CN 100512435 C CN100512435 C CN 100512435C CN B2006101127448 A CNB2006101127448 A CN B2006101127448A CN 200610112744 A CN200610112744 A CN 200610112744A CN 100512435 C CN100512435 C CN 100512435C
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Abstract
This image decoding display method includes: Draw-line decodes the image according to the image draw-line decoding coefficient (IDDC). Print the decoded image onto the image block of the plate object. This image decoding display system (IDDS) consists of the printing module (PM) and the draw-line decoding module (DDM). According to IDDC, DDM draw-line decodes the image and outputs it to PM. PM prints the decoded image onto the image block of the plate object. This technical scheme reduces the load on IDDS and raises the efficiency of IDDS.
Description
Technical field
The present invention relates to the Image Information Processing field, relate in particular to a kind of image decoding display method and system.
Background technology
For being shown on the space of a whole page of guaranteeing that image file under the different images form coded system can be correct, need carry out picture decoding to image file, image file under the different images form coded system is converted to device-dependent display bitmap data, more decoded view data is shown on screen.
At present, common picture decoding process all is to carry out according to the raw information of image fully, and promptly decoded data message all is one to one with the preceding data message of decoding.But the view data that has big data quantity owing to high-resolution, large-sized image file, raw information is gone decoding if place one's entire reliance upon, the data volume that then needs to decode is huge, and the data volume of the image data that the final conversion of process decoding is come out also is huge, this just makes that the load of picture decoding display system is huge and decoding and display speed image are slow inevitably, can't satisfy the high efficiency decoding of high-resolution, large-size images and the requirement that shows.
Therefore, which kind of decoding process the image file of big data quantity is adopted, also just determined to reach load that alleviates the picture decoding display system and the purpose that improves picture decoding and display speed.
Summary of the invention
The invention provides a kind of image decoding display method and system, in order to solve the huge and slow-paced problem of load that has the picture decoding display system in the prior art.
In order to solve the problems of the technologies described above, the invention provides a kind of image decoding display method, may further comprise the steps:
According to formula X=Y/ (computed image of Z * A) take out the line desorption coefficient, wherein, X represents to take out the line desorption coefficient, Y presentation video resolution, Z represents screen resolution, A represents space of a whole page displaying ratio;
The line desorption coefficient of taking out according to described image is taken out the line described image of decoding;
The image block that the decoded image of line is plotted to page object will be taken out.
Further, said method also can have following characteristics: to after the taking out the line desorption coefficient and round of the described image that calculates, take out the line described image of decoding according to the line desorption coefficient of taking out after rounding again downwards.
Further, said method also can have following characteristics: in advance for taking out line desorption coefficient divided rank, when described image calculation go out take out the line desorption coefficient and belong to specific grade the time, with this grade correspondence take out in the line desorption coefficient minimum value as described image final take out the line desorption coefficient.
Further, said method also can have following characteristics: for the line desorption coefficient of taking out that calculates is taken the logarithm, according to described divided rank as a result of taking the logarithm.
Further, said method also can have following characteristics: the formula of determining the grade of taking out the line desorption coefficient that calculates is:
Wherein, N represents to take out line desorption coefficient grade, and X represents to calculate takes out the line desorption coefficient, and P is a set point;
Again according to the grade of taking out the line desorption coefficient that calculates determine image final take out the line desorption coefficient, formula is:
X
NEW＝P
N
Wherein, X
NEWPresentation video is final takes out the line desorption coefficient, and N represents to take out line desorption coefficient grade, and P is described set point.
Further, said method also can have following characteristics: after described space of a whole page displaying ratio changes, also comprise in the described method: that obtains described image again takes out the line desorption coefficient, again take out the line described image of decoding according to the described line desorption coefficient of taking out that obtains again, and will take out the image block that the decoded image of line is plotted to page object again.
Further, said method also can have following characteristics: described obtain again take out that line desorption coefficient and described image last time obtain take out the line desorption coefficient when identical, directly the described image last time is taken out the image block that the decoded image of line repaints page object.
Further, said method also can have following characteristics: whether that judges earlier image takes out the line desorption coefficient greater than 1, if, according to image take out the line desorption coefficient, described image is taken out line decodes; Otherwise, directly image is decoded.
The present invention also provides a kind of picture decoding display system, comprises drafting module, also comprise taking out the line decoder module, wherein:
The described line decoder module of taking out comprises calculating sub module and takes out line decoding submodule, described calculating sub module, according to formula X=Y/ (computed image of Z * A) take out the line desorption coefficient, wherein, X represents to take out the line desorption coefficient, Y presentation video resolution, Z represents screen resolution, and A represents space of a whole page displaying ratio; The described line decoding submodule of taking out is taken out the line described image of decoding according to the line desorption coefficient of taking out of image, and is exported to described drafting module;
Described drafting module is plotted to decoded image the image block of page object.
Further, said system also can have following characteristics: described system also comprises the direct decoding module, and the described line decoder module of taking out also comprises the judgement submodule, wherein:
Described judge that submodule judges the output of described calculating sub module whether take out the line desorption coefficient greater than 1, if will describedly take out the line desorption coefficient and export to the described line submodule of decoding of taking out; Otherwise, notify described direct decoding module;
Described direct decoding module is directly decoded to image according to the notice of judging submodule, and exports to described drafting module.
Further, said system also can have following characteristics: the described line decoder module of taking out also comprises: round submodule, be used for exporting to the described line decoding submodule of taking out again after result of calculation with described calculating sub module rounds.
Further, said system also can have following characteristics: the described line decoder module of taking out also comprises: coefficient is determined submodule, be used for determining the grade of taking out the line desorption coefficient of described calculating sub module output, and according to described grade determine described image final take out the line desorption coefficient, export to the described line decoding submodule of taking out.
Further, said system also can have following characteristics: described coefficient determines that submodule comprises:
First memory cell is preserved the hierarchical relationship of taking out the line desorption coefficient;
The coefficient determining unit, the hierarchical relationship of taking out the line desorption coefficient according to described first memory cell preservation, determine the grade of taking out the line desorption coefficient of described calculating sub module output, and with this grade correspondence take out in the line desorption coefficient minimum value as described image final take out the line desorption coefficient, export to the described line decoding submodule of taking out.
Further, said system also can have following characteristics: described system also comprises second memory cell, the 3rd memory cell and processing sub, wherein:
Described second memory cell is preserved the current line desorption coefficient of taking out of described image;
Described the 3rd memory cell is preserved and is taken out the decoded image of line according to the described current line desorption coefficient of taking out;
Described processing sub judge the space of a whole page displaying ratio of described image change the back described round that submodule or described coefficient determine that submodule exports again take out the line desorption coefficient whether with described second memory cell in preserve current to take out the line desorption coefficient identical, if the image of preserving in described the 3rd memory cell is exported to described drafting module; Otherwise, round the line desorption coefficient of taking out that submodule or described coefficient determine that submodule is exported again and export to described second memory cell and the described line decoding submodule of taking out described;
The described line decoding submodule of taking out is taken out the line described image of decoding according to the line desorption coefficient of taking out of described output again, and exports to described the 3rd memory cell and described drafting module.
Beneficial effect of the present invention is as follows:
Adopt technical solution of the present invention, take out line this image of decoding according to the line desorption coefficient of taking out of image; The image block that the decoded image of line is plotted to page object will be taken out.Because image is taken out the line decoding, so reduced the data volume of decoding, and also reduced through the final data volume of changing the image data that comes out of decoding, this has just reduced the load of picture decoding display system, decoding and display speed have been improved, thereby satisfy the high efficiency decoding and the display requirement of high-resolution, large scale picture, make that the image processing performance of high-resolution, large-sized images with large data volume and general data amount is roughly suitable.And, because after taking out the line decoding, the resolution of image equals or is slightly larger than screen resolution, so adopt technical solution of the present invention can also in the data volume that reduces decoding, guarantee the display effect of screen.
And, in advance for taking out line desorption coefficient divided rank, when image calculation go out take out the line desorption coefficient and belong to specific grade the time, with this grade correspondence take out in the line desorption coefficient minimum value as image final take out the line desorption coefficient, line desorption coefficient and image last time calculate when taking out the line desorption coefficient and belonging to same grade when taking out of newly calculating of image, image is not carried out new taking out the line decoding, thereby avoided the situation of frequently decoding for the demonstration of same image.
Description of drawings
Fig. 1 is the flow chart that picture decoding shows among the embodiment one;
Fig. 2 is the structured flowchart of the picture decoding display system among the embodiment one;
Fig. 3 is the flow chart that picture decoding shows among the embodiment two;
Fig. 4 is the structured flowchart of the picture decoding display system among the embodiment two.
Embodiment
Because in the specific implementation of display image screen, the resolution of image generally all is higher than the resolution of screen, therefore, when screen during at display image, generally all can not demonstrate the original appearance of image.For example, the resolution of screen is 72dpi (dpi (dots per inch)), and when space of a whole page displaying ratio was 100%, it was the image of 300dpi that screen is wanted display resolution, can not demonstrate the original appearance of image, and when showing, this image has some points to be rejected.Just because of this, the present invention proposes image is taken out the line decoding, the resolution of taking out the decoded image of line is equaled or be slightly larger than screen resolution, can either guarantee the display effect of screen, reduced the data volume of the image data that the data volume of decoding and decoding obtain again because take out line decoding, reduce the load of picture decoding display system, improved decoding and display speed.
Core concept of the present invention is, takes out line this image of decoding according to the line desorption coefficient of taking out of image; The image block that the decoded image of line is plotted to page object will be taken out.
Below in conjunction with drawings and Examples the present invention is done to describe further.
Embodiment one
As shown in Figure 1, the flow process that picture decoding shows in the present embodiment may further comprise the steps:
Step S101, according to screen resolution, space of a whole page displaying ratio and image resolution ratio, computed image take out the line desorption coefficient;
When the space of a whole page need be drawn by system, when being plotted to the image block of page object, take out the line desorption coefficient according to what following formula calculated this image earlier:
X＝Y/(Z×A) (1)
Wherein, X represents to take out the line desorption coefficient, Y presentation video resolution, and Z represents screen resolution, A represents space of a whole page displaying ratio.
Step S102 judges that whether this take out the line desorption coefficient greater than 1, if carry out step S104, otherwise carry out step S103;
Because the resolution of image generally all is higher than the resolution of screen, promptly take out the line desorption coefficient generally all greater than 1, take out the line desorption coefficient seldom less than 1 situation, so in the specific implementation, also can ignore and take out the line desorption coefficient less than 1 situation, promptly omit to judge judge and take out the line desorption coefficient, directly this image is taken out the line decoding according to the line desorption coefficient of taking out that calculates whether greater than 1 step.
Step S103 directly decodes to image, finishes;
Promptly all data of image file are all decoded.
Step S104 takes out the line decoding according to the line desorption coefficient of taking out that calculates to this image;
Because which kind of picture format coded system no matter, for example RLE (Run Length Encoding), LZW (Lempel-Ziv-Welch), JPEG (Joint Photographic Experts Group) etc., all image file is encoded with behavior unit, therefore, when the image file of decoding under the various picture format coded systems, all image file is decoded with behavior unit.
When taking out the line decoding, specify the particular row data to decode according to taking out the line desorption coefficient earlier, from decoded line data, read out the specify columns data again, be shown as figure thereby create.
As seen, take out the image that obtains after the line decoding according to the line desorption coefficient of taking out that calculates, the resolution of its resolution and screen equates, its display effect and image directly decoded and indifference, but the data volume of the image data that the data volume of decoding and decoding obtain but reduced.
In an example of the present invention, image resolution ratio is 500dpi, and screen resolution is 100dpi, when space of a whole page displaying ratio is 100%, takes out the line desorption coefficient according to what formula (1) calculated this image:
X＝Y/(Z×A)＝500/(100×100％)＝5
The line desorption coefficient of taking out that obtains thus is 5, then when taking out the line decoding, specifies data line in every five-element's data, decodes; From decoded each line data, read the specify columns data again, wherein, specify a columns certificate in per five columns certificate.As seen, in this example, the data that data of decoding and decoding obtain have reduced 4/5 than the data of decoding according to the raw information of image, improve decoding and display speed, and can't influence the display effect of screen.
And when space of a whole page displaying ratio is changed to 200%, take out the line desorption coefficient according to what formula (1) calculated this image once more:
X＝Y/(Z×A)＝500/(100×200％)＝2.5
As seen, the line desorption coefficient of taking out of this image that calculate this moment is not an integer, in this case, two kinds of processing modes can be arranged:
First kind of processing mode: directly image file is decoded according to the line desorption coefficient of taking out that calculates;
In this example, then in every five-element's data, specify two line data to decode, from decoded each line data, read the specify columns data again, wherein, specify two columns certificates in per five columns certificate.But because in some cases, what directly calculate takes out the line desorption coefficient and may have very complicated decimal place, very is not easy to handle, and therefore, handles for convenience, also can adopt second kind of processing mode as described below.
Second kind of processing mode: the line desorption coefficient of taking out that will calculate rounds downwards, according to the line desorption coefficient of taking out after rounding image file is decoded again.
In this example, be 2 to taking out after the line desorption coefficient rounds downwards of this image, then in taking out the line decode procedure, in per two line data, specify data line to decode, from decoded each line data, read the specify columns data again, wherein, specify a columns certificate in per two columns certificate.
As seen, in first kind of processing mode, the data of decoding have reduced 3/5 than the data of decoding according to the raw information of image, make that taking out the decoded image resolution ratio of line equals screen resolution.And in second kind of processing mode, the data of decoding have reduced 1/2 than the data of decoding according to the raw information of image, promptly, than 1/10 the data of having decoded in first kind of processing mode more, take out the decoded image resolution ratio of line and be slightly larger than screen resolution, but deal with more convenient.Simultaneously, two kinds of processing modes can guarantee the display effect of screen.
Step S105 will take out the image block that the decoded image of line is plotted to page object.
After will taking out the decoded image of line and being plotted to the image block of page object, if the space of a whole page displaying ratio of this image changes, what then need to obtain again this image takes out the line desorption coefficient, again take out line this image of decoding according to the line desorption coefficient of taking out that obtains again, and will take out the image block that the decoded image of line is plotted to page object again.
For second kind of processing mode among the step S104, after the space of a whole page displaying ratio of this image changes, that recomputates this image takes out the line desorption coefficient, to recalculate take out the line desorption coefficient and round downwards after, may be with current to take out the line desorption coefficient identical, then, in this case, this image is not carried out the new line decoding of taking out, directly taken out the image block that the decoded image of line repaints page object this image last time and get final product.
The picture decoding display system comprises and takes out line decoder module 100 and drafting module 200 as shown in Figure 2 in the present embodiment, wherein:
Take out line decoder module 100, take out line this image of decoding according to the line desorption coefficient of taking out of image, and export to drafting module 200; Take out line decoder module 100 and comprise following submodule:
Calculating sub module 110, according to screen resolution, space of a whole page displaying ratio and image resolution ratio, computed image take out the line desorption coefficient, and output result of calculation;
Take out line decoding submodule 120, take out line this image of decoding according to the line desorption coefficient of taking out of image, and export to drafting module 200.
Take out line decoding for convenience, taking out line decoder module 100 and can also comprise and round submodule 130 in the present embodiment is used for exporting to after result of calculation with calculating sub module 110 rounds again and takes out line decoding submodule 120.
Because after the space of a whole page displaying ratio of image changes, the line desorption coefficient of taking out of this image that calculating sub module 110 recalculates also changes, but might to calculate take out the line desorption coefficient and round after, obtain take out the line desorption coefficient and current to take out the line desorption coefficient identical, this moment, necessity was not taken out the line decoding to this image again, therefore for fear of this situation, system in the present embodiment can also comprise second memory cell 160, the 3rd memory cell 170 and processing sub 150, wherein:
The 3rd memory cell 170 is preserved according to this current line desorption coefficient of taking out and is taken out the decoded image of line;
Take out line decoding submodule 120 and take out line this image of decoding, and export to the 3rd memory cell 170 and drafting module 200 according to this line desorption coefficient of exporting again of taking out.
Owing to the line desorption coefficient may occur taking out less than 1 situation, and taking out the line desorption coefficient less than 1 o'clock, should decode to the total data of image file, therefore, picture decoding display system in the present embodiment can also comprise direct decoding module 300, take out and can also comprise in the line decoder module 100 and judge submodule 140, wherein:
Embodiment two
When showing same image file, in case space of a whole page displaying ratio changes, taking out the line desorption coefficient also will change, in a single day change and take out the line desorption coefficient, will try again and take out the line decoding according to the line desorption coefficient of taking out of this image of newly calculating again image file, this also can bring the picture decoding display system bigger load, therefore, in the present embodiment, in advance for taking out line desorption coefficient divided rank, when this image calculation go out take out the line desorption coefficient and belong to specific grade the time, take out the line desorption coefficient with the minimum value in the line desorption coefficient of taking out of this grade correspondence as this image.Thereby when the line desorption coefficient of taking out of image changes, but during taking out the line desorption coefficient and belong to same grade before and after changing, do not need again image to be decoded, reduced the decoding number of times, and satisfy the required precision that image shows simultaneously, do not influence the screen display effect.
As shown in Figure 3, the flow process that picture decoding shows in the present embodiment may further comprise the steps:
Step S301, according to screen resolution, space of a whole page displaying ratio and image resolution ratio, computed image take out the line desorption coefficient;
In the present embodiment, also can take out the line desorption coefficient according to what formula (1) calculated this image.
Step S302 judges that whether this take out the line desorption coefficient greater than 1, if carry out step S304, otherwise carry out step S303;
Step S303 directly decodes to image, finishes;
Step S304, line desorption coefficient grade judges that this image calculation goes out takes out grade under the line desorption coefficient according to taking out of dividing in advance;
In an example of the present invention, be to determine the grade of taking out the line desorption coefficient that this calculates according to the result that the line desorption coefficient takes the logarithm that takes out who calculates, wherein, the formula of calculating grade is:
Wherein, N represents to take out line desorption coefficient grade, and X represents to calculate takes out the line desorption coefficient; This formula is promptly got 2 being the logarithm at the end the line desorption coefficient of taking out that calculates, and the result who takes the logarithm rounded downwards draws the grade of taking out the line desorption coefficient that this calculates.
Step S305, with this image calculation obtain take out grade correspondence under the line desorption coefficient take out in the line desorption coefficient minimum value as this image final take out the line desorption coefficient;
In above-mentioned example, the line desorption coefficient of finally taking out of this image is:
X
NEW＝2
N (3)
This is because in this example, and the minimum value of taking out the line desorption coefficient in grade is 2
N
For example, the resolution of this image is 500dpi, and screen resolution is 100dpi, when space of a whole page displaying ratio is 100%, takes out the line desorption coefficient according to what formula (1) calculated this image:
X＝Y/(Z×A)＝500/(100×100％)＝5
Determine the grade of taking out the line desorption coefficient that this calculates according to formula (2) then:
Finally take out the line desorption coefficient according to what formula (3) calculated this image again:
X
NEW＝2
N＝2
2＝4
Promptly when this image of decoding, it takes out the line desorption coefficient is 4, specifies data line in every four lines data, decodes; From decoded each line data, read the specify columns data again, wherein, specify a columns certificate in per four columns certificate.
The benefit of doing like this is, when the space of a whole page displaying ratio of this image changes, though take out the line desorption coefficient and can change according to what formula (1) calculated, if but the line desorption coefficient of taking out before and after changing all belongs to same grade, then need not decode to image once more, thereby reduce the decoding number of times.And take out that the resolution of this image is slightly larger than screen resolution after the line decoding, can guarantee the display effect of screen.
For example, in the above-mentioned example, the space of a whole page displaying ratio of this image becomes 80%, then takes out the line desorption coefficient according to what formula (1) calculated this image:
X＝Y/(Z×A)＝500/(100×80％)＝6.25
Determine the grade of taking out the line desorption coefficient that this calculates according to formula (2) then:
Finally take out the line desorption coefficient according to what formula (3) calculated this image again:
X
NEW＝2
N＝2
2＝4
As seen, after the space of a whole page displaying ratio of this image became 80%, the line desorption coefficient of finally taking out of this image did not change, and in this case, needn't do again decoding to this image, thereby reduced the decoding number of times.
In above-mentioned example, be the grade of taking out the line desorption coefficient that the mode of the logarithm at the end calculates by asking with 2, only be more convenient in order to implement, in the present embodiment, can be as required with other regular divided rank, be the grade of taking out the line desorption coefficient that the logarithm at the end calculates for example by asking with other numerical value; Perhaps the multiple according to a numerical value comes divided rank, and for example: the multiple with 4 is an example, the first estate correspondence to take out line desorption coefficient scope be [1,4), the line desorption coefficient scope of taking out of the second grade correspondence for [4,8), the line desorption coefficient scope of taking out of tertiary gradient correspondence for [8,12), by that analogy.In this case, when image calculation go out take out the line desorption coefficient and be 5 the time, finally take out the line desorption coefficient with the minimum value 4 in the line desorption coefficient of taking out of the second grade correspondence under 5 as this image; When image calculation go out take out the line desorption coefficient and be 8 the time, get final product as the line desorption coefficient of finally taking out of this image with the minimum value 8 of taking out in the line desorption coefficient of the tertiary gradient correspondence under 8.As seen, the grade of taking out the line desorption coefficient can be to divide arbitrarily as required.
Step S306 takes out the line decoding according to the line desorption coefficient of taking out that this image is final to this image;
Step S307 will take out the image block that the decoded image of line is plotted to page object.
After the space of a whole page displaying ratio of this image changed, that need obtain this image again took out the line desorption coefficient, took out line this image of decoding again according to the line desorption coefficient of taking out that obtains again, and will take out the image block that the decoded image of line is plotted to page object again.
In the present embodiment, after the space of a whole page displaying ratio of this image changes, that recomputates this image takes out the line desorption coefficient, the line desorption coefficient of taking out that recalculates belongs to same grade, what obtain final takes out the line desorption coefficient and current to take out the line desorption coefficient identical, then, and in this case, this image is not carried out the new line decoding of taking out, directly taken out the image block that the decoded image of line repaints page object this image last time and get final product.
The picture decoding display system comprises and takes out line decoder module 100 and drafting module 200 as shown in Figure 4 in the present embodiment, wherein:
Take out line decoder module 100, take out line this image of decoding according to the line desorption coefficient of taking out of image, and export to drafting module 200; Take out line decoder module 100 and comprise following submodule:
Calculating sub module 110, according to screen resolution, space of a whole page displaying ratio and image resolution ratio, computed image take out the line desorption coefficient, and output result of calculation;
Coefficient is determined submodule 180, is used for determining the grade of taking out the line desorption coefficient of calculating sub module 110 outputs, and according to this grade determine this image final take out the line desorption coefficient, export to and take out line decoding submodule 120; Coefficient determines that submodule 180 comprises with lower unit:
Take out line decoding submodule 120, take out line this image of decoding according to the line desorption coefficient of taking out of image, and export to drafting module 200.
Because after the space of a whole page displaying ratio of image changes, the line desorption coefficient of taking out of this image that calculating sub module 110 recalculates also changes, but the line desorption coefficient of taking out that might recalculate belongs to same grade, what obtain final takes out the line desorption coefficient and current to take out the line desorption coefficient identical, this moment, necessity was not taken out the line decoding to this image again, therefore for fear of this situation, system in the present embodiment can also comprise second memory cell 160, the 3rd memory cell 170 and processing sub 150, wherein:
The 3rd memory cell 170 is preserved according to this current line desorption coefficient of taking out and is taken out the decoded image of line;
Take out line decoding submodule 120 and take out line this image of decoding, and export to the 3rd memory cell 170 and drafting module 200 according to this line desorption coefficient of exporting again of taking out.
Picture decoding display system in the present embodiment can also comprise direct decoding module 300, takes out to comprise judgement submodule 140 in the line decoder module 100, wherein:
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1, a kind of image decoding display method is characterized in that, may further comprise the steps:
According to formula X=Y/ (computed image of Z * A) take out the line desorption coefficient, wherein, X represents to take out the line desorption coefficient, Y presentation video resolution, Z represents screen resolution, A represents space of a whole page displaying ratio;
The line desorption coefficient of taking out according to described image is taken out the line described image of decoding;
The image block that the decoded image of line is plotted to page object will be taken out.
2, the method for claim 1 is characterized in that, to after the taking out the line desorption coefficient and round of the described image that calculates, takes out the line described image of decoding according to the line desorption coefficient of taking out after rounding again downwards.
3, the method for claim 1, it is characterized in that, in advance for taking out line desorption coefficient divided rank, when described image calculation go out take out the line desorption coefficient and belong to specific grade the time, with this grade correspondence take out in the line desorption coefficient minimum value as described image final take out the line desorption coefficient.
4, method as claimed in claim 3 is characterized in that, for the line desorption coefficient of taking out that calculates is taken the logarithm, according to described divided rank as a result of taking the logarithm.
5, method as claimed in claim 4 is characterized in that, determines that the formula of the grade of taking out the line desorption coefficient that calculates is:
Wherein, N represents to take out line desorption coefficient grade, and X represents to calculate takes out the line desorption coefficient, and P is a set point;
Again according to the grade of taking out the line desorption coefficient that calculates determine image final take out the line desorption coefficient, formula is:
X
NEW＝P
N
Wherein, X
NEWPresentation video is final takes out the line desorption coefficient, and N represents to take out line desorption coefficient grade, and P is described set point.
6, as the described method of arbitrary claim in the claim 1 to 5, it is characterized in that, after described space of a whole page displaying ratio changes, also comprise in the described method: that obtains described image again takes out the line desorption coefficient, again take out the line described image of decoding according to the described line desorption coefficient of taking out that obtains again, and will take out the image block that the decoded image of line is plotted to page object again.
7, method as claimed in claim 6, it is characterized in that, described obtain again take out that line desorption coefficient and described image last time obtain take out the line desorption coefficient when identical, directly the described image last time is taken out the image block that the decoded image of line repaints page object.
8, the method for claim 1 is characterized in that, whether that judges earlier image takes out the line desorption coefficient greater than 1, if, according to image take out the line desorption coefficient, described image is taken out line decodes; Otherwise, directly image is decoded.
9, a kind of picture decoding display system comprises drafting module, it is characterized in that, also comprise taking out the line decoder module, wherein:
The described line decoder module of taking out comprises calculating sub module and takes out line decoding submodule, described calculating sub module, according to formula X=Y/ (computed image of Z * A) take out the line desorption coefficient, wherein, X represents to take out the line desorption coefficient, Y presentation video resolution, Z represents screen resolution, and A represents space of a whole page displaying ratio; The described line decoding submodule of taking out is taken out the line described image of decoding according to the line desorption coefficient of taking out of image, and is exported to described drafting module;
Described drafting module is plotted to decoded image the image block of page object.
10, system as claimed in claim 9 is characterized in that, described system also comprises the direct decoding module, and the described line decoder module of taking out also comprises the judgement submodule, wherein:
Described judge that submodule judges the output of described calculating sub module whether take out the line desorption coefficient greater than 1, if will describedly take out the line desorption coefficient and export to the described line submodule of decoding of taking out; Otherwise, notify described direct decoding module;
Described direct decoding module is directly decoded to image according to the notice of judging submodule, and exports to described drafting module.
11, system as claimed in claim 9 is characterized in that, the described line decoder module of taking out also comprises: round submodule, be used for exporting to the described line decoding submodule of taking out again after result of calculation with described calculating sub module rounds.
12, system as claimed in claim 9, it is characterized in that, the described line decoder module of taking out also comprises: coefficient is determined submodule, be used for determining the grade of taking out the line desorption coefficient of described calculating sub module output, and according to described grade determine described image final take out the line desorption coefficient, export to the described line decoding submodule of taking out.
13, system as claimed in claim 12 is characterized in that, described coefficient determines that submodule comprises:
First memory cell is preserved the hierarchical relationship of taking out the line desorption coefficient;
The coefficient determining unit, the hierarchical relationship of taking out the line desorption coefficient according to described first memory cell preservation, determine the grade of taking out the line desorption coefficient of described calculating sub module output, and with this grade correspondence take out in the line desorption coefficient minimum value as described image final take out the line desorption coefficient, export to the described line decoding submodule of taking out.
14, as claim 11,12 or 13 described systems, it is characterized in that described system also comprises second memory cell, the 3rd memory cell and processing sub, wherein:
Described second memory cell is preserved the current line desorption coefficient of taking out of described image;
Described the 3rd memory cell is preserved and is taken out the decoded image of line according to the described current line desorption coefficient of taking out;
Described processing sub judge the space of a whole page displaying ratio of described image change the back described round that submodule or described coefficient determine that submodule exports again take out the line desorption coefficient whether with described second memory cell in preserve current to take out the line desorption coefficient identical, if the image of preserving in described the 3rd memory cell is exported to described drafting module; Otherwise, round the line desorption coefficient of taking out that submodule or described coefficient determine that submodule is exported again and export to described second memory cell and the described line decoding submodule of taking out described;
The described line decoding submodule of taking out is taken out the line described image of decoding according to the line desorption coefficient of taking out of described output again, and exports to described the 3rd memory cell and described drafting module.
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| CNB2006101127448A CN100512435C (en) | 2006-08-31 | 2006-08-31 | Image decoding display method and system |
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| CNB2006101127448A CN100512435C (en) | 2006-08-31 | 2006-08-31 | Image decoding display method and system |
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| CN100512435C true CN100512435C (en) | 2009-07-08 |
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