CN102291517A - Resolution regulation method - Google Patents
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- CN102291517A CN102291517A CN2010102087196A CN201010208719A CN102291517A CN 102291517 A CN102291517 A CN 102291517A CN 2010102087196 A CN2010102087196 A CN 2010102087196A CN 201010208719 A CN201010208719 A CN 201010208719A CN 102291517 A CN102291517 A CN 102291517A
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Abstract
The invention relates to a resolution regulation method, which is applied to an image capturing device. The image capturing device comprises an image pickup module and a storage unit. The method comprises the following steps of: using the image pickup module for capturing an image with the first resolution; analyzing the object quantity in the captured image; comparing the object quantity to at least one threshold; reducing the resolution of the image to the second resolution from the first resolution by at least one corresponding small threshold when the object quantity is smaller than at least one threshold and storing the image with the second resolution into the storage unit; and storing the image with the first resolution into the storage unit when the object quantity is greater than or equal to all thresholds. The resolution regulation method has the advantages that the resolution when the image is stored is determined through analyzing the object quality of the captured image, so the stored resources are effectively utilized.
Description
Technical field
The present invention relates to a kind of image treatment method, particularly a kind of method of adjustment of resolution.
Background technology
Along with the development of digital camera, make that photography no longer is expensive consumption.The user can be random the desired image of shooting, in order to write down memorable a moment or scene.
When taking, general user wishes that taken photo is apparent.So, when photographic subjects thing (can be landscape, personage or article), all to adjust suitably for the focal length and the brightness of object, just can photograph satisfied photo.
Along with the progress of science and technology, digital camera provides the function of automatic setting camera parameter mostly.In general, digital camera calculates suitable camera parameter at object.
On the resolution of the image that photographs, still can only before taking pictures, be provided relevant menu to adjust by digital camera voluntarily by the user.
If the user does not change resolution setting, all can have equal resolution at every kind of occasion, every kind of theme or the taken image of each leading role this moment.
Because the storage area of digital camera is limited, when resolution setting was higher, the image number that can take then can be less relatively.And when putting in order, regular meeting finds that having many photos of getting useless, that hesitate to discard to be left has occupied storage resources, for example: the individual photo album on the memory card on the camera, the hard disk on the computer, burning CD or the network afterwards.
Otherwise, when in order to save the space of storage area, and when selecting to use lower resolution, then can sacrifice the details of good photo.
In order not omit any details, when selecting to use highest resolution, the photo of inferior, the relatively poor or extreme difference of effect then can not have or the extremely unworthy space that occupies the camera Storage Media, has influenced greatly and can clap number.
Summary of the invention
In view of above problem, the invention provides a kind of method of adjustment of resolution, by solving the one or more problems of existing in prior technology.
The method of adjustment of the disclosed resolution of the present invention, it is applied to an image capture unit.This image capture unit comprises a photographing module and a storage element.
At first, utilize photographing module to capture image, and analyze the object amount in the image that captures with first resolution.
Then, the object amount that analysis is obtained is compared with one or more threshold values.
The object amount that obtains when analysis is during less than one or more threshold value, corresponding less than threshold value the resolution of image is turned down from first resolution is second resolution; Perhaps, it is second resolution that the resolution of image capture unit is turned down from first resolution, and captures the image with second resolution again.Then, the image that will have second resolution is stored in the storage element.
The object amount that obtains when analysis is during more than or equal to all threshold values, and the image that will have first resolution is stored in the storage element.
Object amount in the image can be by carrying out the marginalisation program earlier, with the image edgeization that will capture, the content of the quantity of segment or edge composition in the image after the edge calculationization, so as to the content of the quantity of the segment that will calculate or marginal element as the object amount.
Method of adjustment according to resolution of the present invention can be applicable to an image capture unit, its be in the image that captures by analysis object how much decide image to store the time resolution, promptly, judge the image whether convergent-divergent captures or judge whether turn down the resolution of image capture unit, and then effectively utilize storage resources.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the schematic diagram of an image capture unit;
Fig. 2 A is the flow chart according to the method for adjustment of the resolution of first embodiment of the invention;
Fig. 2 B is the flow chart according to the method for adjustment of the resolution of second embodiment of the invention;
Fig. 3 A is the thin portion flow chart of the step 220 of an embodiment;
Fig. 3 B is the thin portion flow chart of the step 220 of another embodiment;
Fig. 4 is the schematic diagram of the image edgeization of an embodiment;
Fig. 5 A is the flow chart according to the method for adjustment of the resolution of third embodiment of the invention;
Fig. 5 B is the flow chart according to the method for adjustment of the resolution of fourth embodiment of the invention;
Fig. 6 A is the flow chart according to the method for adjustment of the resolution of fifth embodiment of the invention;
Fig. 6 B is the flow chart according to the method for adjustment of the resolution of sixth embodiment of the invention.
Wherein, Reference numeral
100 image capture units
110 photographing modules
112 lens group
114 photo-sensitive cells
130 storage elements
150 processing units
The B segment
L edge composition
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done concrete description:
Method of adjustment according to resolution of the present invention can be applicable to an image capture unit, make object in its image that can capture by analysis how much decide image to store the time resolution, promptly, judge the image whether convergent-divergent captures or judge whether turn down the resolution of image capture unit, and then effectively utilize storage resources.Wherein, image capture unit can be digital camera, digital camera or has the electronic installation (for example: mobile phone or computer etc.) of photographing module.
Please refer to Fig. 1, image capture unit 100 can comprise: photographing module 110, storage element 130 and processing unit 150.Photographing module 110 comprises lens group 112 and photo-sensitive cell 114.
Photo-sensitive cell 114 corresponding lens group 112 and being provided with.Photo-sensitive cell 114 can receive light signal corresponding to object and peripheral scenery thereof by lens group 112, and the signal of telecommunication that converts digitized video according to received light signal to is to obtain the image corresponding to object.In other words, photo-sensitive cell 114 can be via the find a view image of picture of lens group 112.
In this, processing unit 150 also can be analyzed the object amount of the image that captures and optionally adjust the setting of the resolution of the resolution of the image that captures or image capture unit according to the object amount of the image that captures.
In other words, can software according to the method for adjustment of resolution of the present invention or firmware program be implemented on the image capture unit 100.Promptly, can be stored in the image capture unit 100 in order to the program code of enforcement according to the method for adjustment of resolution of the present invention, read and carry out the program code of storage again by the processing unit 150 of image capture unit 100, so that the method for adjustment that image capture unit 100 is carried out according to resolution of the present invention.
Wherein, processing unit 150 can be by one or more processors, for example: digital signal processor (digitalsignal processor; DSP) etc., realize.Storage element 130 can be realized by one or more holders.Holder can be non-volatility memory or is the volatility memory body.
In this, the image of analyzing can be the preview image or is filmed image.The preview image is meant the image that image capture unit 100 is captured in preview phase or focusing stage.Filmed image is meant that image capture unit 100 is in the image that photographing phase captured.
In general, the running of image capture unit 100 can be divided into preview phase (live view), focusing stage (auto focusing) and photographing phase.
Preview phase is meant that the user pushes the shutter key moment before of image capture unit 100.In preview phase, the user can be by the display (not shown) preview of image capture unit 100 picture of finding a view.
Focusing stage is meant that the user is in half moment by the shutter key of image capture unit 100.In focusing stage, image capture unit 100 can be with in the subject matter in the picture of finding a view one or more as object, and the object distance of adjustment lens group 112 and object, and the user can pass through the find a view picture of the display (not shown) preview of image capture unit 100 to defocused (that is after, the object distance adjustment is finished).
Photographing phase is meant that the user presses the moment of the shutter key of image capture unit 100 entirely.In photographing phase, image capture unit 100 is taken the current picture of finding a view of finding a view picture and will photograph by photographing module 110 and is recorded as an image.
Fig. 2 A and Fig. 2 B are the flow charts for the method for adjustment of the resolution of two embodiment according to the present invention.
With reference to Fig. 1, Fig. 2 A and Fig. 2 B, at first, utilize photographing module 110 to take with acquisition corresponding to a image (step 210) at a plurality of subject matters in image capture unit 100 the place aheads.This image has first resolution.This first resolution can be the resolution of image capture unit 100 current settings or is the upper limit (this upper limit can be determined by the ability of image capture unit 100) of the resolution of image capture unit 100.These a little subject matters can be at least a feature object in people's face, building, animal, plant, mountain, cloud, stone, flowing water, the vehicles, sign and the special article.
Then, analyze object amount (step 220) in the image capture.
And utilize and analyze the complexity that the object amount that obtains is judged image, promptly whether the object amount meets impose a condition (step 230).In this, what of the detail section (that is subject matter) that shows in the image are the complexity of image be meant.
When the complexity of image was high relatively, the image that then will have first resolution was stored in the storage element 130 (step 240).
When the complexity of image was low relatively, then to turn down from first resolution be second resolution (step 250) to the resolution of the image that will capture; Perhaps, it is second resolution (step 252) that the setting of the resolution of image capture unit is turned down from first resolution, and utilizes photographing module 110 pick-up image (step 254) once more after adjusting.At this moment, image then has second resolution.
Then, the image that will have second resolution again is stored in the storage element 130 (step 260).
With reference to Fig. 3 A and Fig. 3 B, in step 220, can carry out the marginalisation program by processing unit 150, with the image edgeization (step 222) that will capture, the content (step 224 or step 226) of the quantity of segment or marginal element in the image after the edge calculationization then, and with the content of the quantity of the segment that calculates or marginal element as the object amount.
With reference to Fig. 4, segment B promptly is meant the block that the L of marginal element is distinguished.Wherein, the content of marginal element can be quantity or the marginal element occupied ratio in whole image of the pixel that belongs to marginal element.
In addition, in step 220, also can carry out identification programs by processing unit 150, the quantity of the subject matter in the image that captures with identification and calculating, so as to the quantity of the subject matter that will calculate as the object amount.
In step 230, can utilize a threshold value or have a plurality of threshold values and a relation information (for example: threshold value and resolution are adjusted the mapping table of data) that the self-corresponding resolution of Qi Ge is adjusted data is compared with the object amount that analysis obtains, so as to the complexity of judgement image.
With single threshold value,, the object amount that obtains can be compared with threshold value (step 232) with reference to Fig. 5 A and Fig. 5 B.
When object amount during more than or equal to threshold value, the complexity height of expression image does not promptly carry out the adjustment (step 240) of resolution (setting of the resolution of the resolution of image or image capture unit 100).
When object amount during less than threshold value, the complexity of expression image is low, and then the resolution of image being turned down from first resolution is second resolution (step 250).Perhaps, it is second resolution (step 252) that the setting of the resolution of image capture unit is turned down from first resolution, and the image (step 254) of acquisition with second resolution again.
In step 250 and step 252, can when the complexity of image is low, current resolution (setting of the resolution of the resolution of image or image capture unit 100) be turned down determining with particular power.In other words, first resolution can be the particular power of second resolution, and for example: one times, two times or three times are with first-class.
For instance, suppose that image capture unit 100 current resolution (that is, first resolution) are set at 6MP, and particular power is preset as one times.At this moment, image capture unit 100 utilizes the resolution of the image that photographing module 110 captures to be 6MP.
When analyzing and judge that the result who obtains hangs down for the complexity of image, then processing unit 150 is carried out resolution and is adjusted program, so that the resolution of image is turned down into 3MP (that is second resolution) by 6MP (that is, first resolution).Or processing unit 150 is carried out resolution and is adjusted programs, turns down and becomes to be set at 3MP (that is second resolution) from being set at 6MP with the resolution (that is first resolution) that image capture unit 100 is current.
In step 250 and step 252, also can according to the setting option of the resolution of image capture unit 100 with the gap of a specific grade with the setting of the resolution of the resolution of image or image capture unit 100 low from the first resolution adjustment be second resolution.In other words, first resolution and second resolution differ a specific grade, and for example: grade, two grades or Three Estate are with first-class.
For instance, the setting option of supposing the resolution that image capture unit 100 is provided is 10MP (mega pixel), 8MP, 6MP, 4MP, 3MP, 2MP and 1MP, current resolution (that is, first resolution) is set at 8MP, and specific grade is preset as a grade.
At this moment, when the complexity of determining image is low, then processing unit 150 is carried out resolution and is adjusted program, with by 8MP (promptly with the resolution of image, first resolution) turn down into 6MP (promptly, second resolution) or the resolution (that is first resolution) that image capture unit 100 is current turn down and become to be set at 6MP (that is second resolution) from being set at 8MP.
At this, image capture unit 100 can additionally be set adjusted resolution (that is second resolution) can not be less than the lower limit of the resolution of image capture unit 100 (this lower limit can by the ability decision of image capture unit 100).
Moreover, the minimum value (that is second resolution) of adjustable resolution also can be provided according to the setting option of the resolution that is provided voluntarily by the user.
When the value of predetermined second resolution of adjusting during, then directly with the minimum value of the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting value as second resolution less than the minimum value of the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting.In other words, when the value of predetermined second resolution of adjusting during less than the minimum value of the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting, carrying out when resolution is adjusted then is that resolution is turned down minimum value into the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting from first resolution.
With reference to Fig. 6 A and Fig. 6 B, can also analyze the object amount that obtains and search a relation information (step 234) in addition.This relation information comprises different each other a plurality of threshold values and the pairing resolution adjustment of each threshold value data.
Wherein, resolution is adjusted data and is then represented different adjustment result (that is, adjusting second resolution of different numerical value).In this, threshold value can be a numerical value or is a status indication.Adjust the result and can be special value, particular power or specific grade (based on the setting option of the resolution of image capture unit 100).
For convenience of description, be example with three threshold values, and three descending first threshold value, second threshold value and the 3rd threshold values of being referred to as in regular turn of threshold value.
The object amount that obtains when analysis is during more than or equal to first threshold value, do not adjust resolution and the image of tool first resolution is stored in the storage element 130 (step 240).Because first threshold value is greater than second threshold value and the 3rd threshold value, so the object amount that analysis obtains is equally greater than second threshold value and the 3rd threshold value.
The object amount that obtains when analysis is adjusted data according to the resolution of the first threshold value correspondence during less than first threshold value but more than or equal to second threshold value, and it is second resolution (step 250-1 and step 252-1) that resolution is turned down from first resolution.At this moment, second resolution is to adjust data corresponding to the pairing resolution of first threshold value.
When analysis obtain object amount during less than second threshold value but more than or equal to the 3rd threshold value, adjust data according to the resolution of the second threshold value correspondence, it is second resolution (step 250-2 and step 252-2) that resolution is turned down from first resolution.At this moment, second resolution is to adjust data corresponding to the pairing resolution of second threshold value.
The object amount that obtains when analysis is adjusted data according to the resolution of the 3rd threshold value correspondence during less than the 3rd threshold value, and it is second resolution (step 250-3 and step 252-3) that resolution is turned down from first resolution.At this moment, second resolution is to adjust data corresponding to the pairing resolution of the 3rd threshold value.
In other words, the object amount that obtains when analysis is during less than at least one threshold value, processing unit 150 can according to less than threshold value in minimum threshold value pairing less than at least one threshold value (step 250 and step 252).
In this, when the value of predetermined second resolution of adjusting during, then directly with the minimum value of the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting value as second resolution less than the minimum value of the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting.In other words, when the value of predetermined second resolution of adjusting during less than the minimum value of the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting, the image of adjusting is then turned down minimum value into the adjustable resolution of the lower limit of the resolution of image capture unit 100 or setting from first resolution.
For clearly demonstrating, be example in this with two threshold values, threshold value and corresponding resolution thereof are adjusted data can be as the relation of following table one.But the non-restriction of the present invention of this quantity.
Table one
| Threshold value | Resolution is adjusted data |
| First threshold value | First adjusts the result |
| Second threshold value | Second adjusts the result |
In other words, relation information can be the mapping table of threshold value and resolution adjustment data.
For instance, first threshold value can be set at 50%, and second threshold value can be set at 30%.In this, the bigger expression complexity of numerical value is high more, so this non-restriction of the present invention.And first adjust the result and can be set at and turn down a grade, and second adjusts the result and can be set at and turn down two grades.
The setting option of supposing the resolution that image capture unit 100 is provided is 10MP (mega pixel), 8MP, 6MP, 4MP, 3MP, 2MP and 1MP, and current resolution (that is first resolution) is set at 8MP.
The object amount that obtains when analysis is not then adjusted the resolution of image during more than or equal to first threshold value, and will capture have a 8MP image be stored in the storage element 130.
The object amount that obtains when analysis is during less than first threshold value but more than or equal to second threshold value, processing unit 150 is carried out resolution and is adjusted program, adjust data (promptly with resolution according to the first threshold value correspondence, first adjusts the result), with the resolution of image (promptly by 8MP, first resolution) turn down into 6MP (that is, second resolution), and the image of the capable 6MP of tool is stored in the storage element 130.Or, adjust data (that is, first adjusts the result) according to the resolution of the first threshold value correspondence, image capture unit 100 current resolution setting are turned down by 8MP be 6MP, and acquisition has the image of 6MP again.The image with 6MP that will capture again again is stored in the storage element 130.
The object amount that obtains when analysis is during less than second threshold value, processing unit 150 is carried out resolution and is adjusted program, adjust data (promptly with resolution according to the second threshold value correspondence, second adjusts the result), with the resolution of image (promptly by 8MP, first resolution) turn down into 4MP (that is, second resolution), and the image that will have a 4MP is stored in the storage element 130.Or, adjust data (that is, second adjusts the result) according to the resolution of the second threshold value correspondence, image capture unit 100 current resolution setting are turned down by 8MP be 4MP, and acquisition has the image of 4MP again.The image with 4MP that will capture again again is stored in the storage element 130.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the method for adjustment of a resolution is applied to an image capture unit, and this image capture unit comprises a photographing module and a storage element, it is characterized in that, the method for adjustment of this resolution comprises:
An image that utilizes this photographing module acquisition to have one first resolution;
Object amount in this image that analysis captures;
Relatively this object amount and at least one threshold value;
When this object amount less than this during at least one at least one threshold value, corresponding less than this at least one threshold value the resolution of this image is turned down from this first resolution is one second resolution, and this image that will have this second resolution is stored in this storage element; And
When this object amount during more than or equal to all these threshold values, this image that will have this first resolution is stored in this storage element.
2. the method for adjustment of resolution according to claim 1 is characterized in that, the step of the object amount in this image that this analysis captures comprises:
Carry out a marginalisation program, with this image edgeization that will capture; And
The quantity of segment in this image after the edge calculationization, so as to this quantity of this segment that will calculate as this object amount.
3. the method for adjustment of resolution according to claim 1 is characterized in that, the step of the object amount in this image that this analysis captures comprises:
Carry out a marginalisation program, with this image edgeization that will capture; And
The content of marginal element in this image after the edge calculationization, so as to this content of this marginal element that will calculate as this object amount.
4. the method for adjustment of resolution according to claim 1 is characterized in that, the step of the object amount in this image that this analysis captures comprises:
Carry out an identification program, the quantity of the subject matter in this image that captures with identification and calculating, so as to this quantity of this subject matter that will calculate as this object amount.
5. the method for adjustment of resolution according to claim 1, it is characterized in that, two kinds of resolution in the setting option of this resolution that this first resolution and this second resolution are this image capture unit, and this first resolution and this second resolution differ a specific grade.
6. the method for adjustment of a resolution is applied to an image capture unit, and this image capture unit comprises a photographing module and a storage element, it is characterized in that, the method for adjustment of this resolution comprises:
An image that utilizes this photographing module acquisition to have one first resolution;
Object amount in this image that analysis captures;
Relatively this object amount and at least one threshold value;
When this object amount less than this during at least one at least one threshold value, corresponding less than this at least one threshold value the setting of the resolution of this image capture unit is turned down from this first resolution is one second resolution;
After the resolution adjustment of this image capture unit, utilize this photographing module to capture once more and have an image of this second resolution, and this image that will have this second resolution is stored in this storage element; And
When this object amount during more than or equal to this at least one threshold value, this image that will have this first resolution is stored in this storage element.
7. the method for adjustment of resolution according to claim 6 is characterized in that, the step of the object amount in this image that this analysis captures comprises:
Carry out a marginalisation program, with this image edgeization that will capture; And
The quantity of segment in this image after the edge calculationization, so as to this quantity of this segment that will calculate as this object amount.
8. the method for adjustment of resolution according to claim 6 is characterized in that, the step of the object amount in this image that this analysis captures comprises:
Carry out a marginalisation program, with this image edgeization that will capture; And
The content of marginal element in this image after the edge calculationization, so as to this content of this marginal element that will calculate as this object amount.
9. the method for adjustment of resolution according to claim 6 is characterized in that, the step of the object amount in this image that this analysis captures comprises:
Carry out an identification program, the quantity of the subject matter in this image that captures with identification and calculating, so as to this quantity of this subject matter that will calculate as this object amount.
10. as asking the method for adjustment of 67 a described resolution, wherein this first resolution and this second resolution are to be two kinds of resolution in the setting option of this resolution of this image capture unit, and this first resolution and this second resolution differ a specific grade.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060106460A (en) * | 2005-04-08 | 2006-10-12 | 엘지전자 주식회사 | System for automatically setting a camera and method therefor |
| CN101383934A (en) * | 2007-09-05 | 2009-03-11 | 乐金电子（昆山）电脑有限公司 | Resolution tunable image data storage method and multimedia device applying the method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060106460A (en) * | 2005-04-08 | 2006-10-12 | 엘지전자 주식회사 | System for automatically setting a camera and method therefor |
| CN101383934A (en) * | 2007-09-05 | 2009-03-11 | 乐金电子（昆山）电脑有限公司 | Resolution tunable image data storage method and multimedia device applying the method |
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Application publication date: 20111221 |