CN103024267B - A kind of strengthen the method for auto-focusing, system and mobile terminal - Google Patents
A kind of strengthen the method for auto-focusing, system and mobile terminal Download PDFInfo
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- CN103024267B CN103024267B CN201210505225.3A CN201210505225A CN103024267B CN 103024267 B CN103024267 B CN 103024267B CN 201210505225 A CN201210505225 A CN 201210505225A CN 103024267 B CN103024267 B CN 103024267B
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Abstract
The present invention is applicable to Autofocus Technology field, it is provided that a kind of strengthen the method for auto-focusing, system and mobile terminal.Said method comprising the steps of: mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, read induction apparatus numerical value；The numerical value of reading is contrasted with default initial value；When moving end in mobile status when judging in focusing, then it is again started up auto-focusing；When mobile terminal is not at mobile status when judging in focusing, then keep original focusing state.Present invention enhances the susceptiveness of mobile terminal auto-focusing.
Description
Technical field
The invention belongs to Autofocus Technology field, particularly relate to a kind of strengthen the method for auto-focusing, system and mobile terminal.
Background technology
At present, the mobile phone on market is mostly all with automatic focusing function, and they are segmented into two big classes by principle: a class is based on camera lens and the range finding auto-focusing of range measurement between target that is taken；Another kind of is based on the focus detection auto-focusing of imaging clearly on focusing screen.
1. range finding auto-focusing
Range finding auto-focusing mainly has infrared distance measuring method and ultrasonic ranging method.The principle of infrared distance measuring method is actively to be launched infrared ray by camera as range finding light source, and by the geometrical relationship constituted between infrarede emitting diode, then calculates focal distance.Ultrasonic ranging method is the time propagated between camera and object according to ultrasound wave to carry out finding range.
2. focus detection auto-focusing
Focus detection methods mainly has contrast method and phase method.Contrast method is to realize auto-focusing by the contour edge of detection image.The contour edge of image is the most clear, then its brightness step is the biggest, and the contrast between edge's scenery and background is the biggest in other words.Otherwise, image out of focus, contour edge is smudgy, and brightness step or contrast decline；Out of focus the most remote, contrast is the lowest.Utilizing this principle, be placed on by two photoelectric detectors before and after CCD at equidistance, the image being photographed thing generates on the two detector through light splitting simultaneously, exports the contrast of its imaging respectively.When the absolute value minimum of contrast that two detectors are exported difference, illustrate the image planes focused just in the middle of two detectors, i.e. close with the imaging surface of CCD, then focused.Phase method is to realize auto-focusing by the side-play amount of detection picture.Place a waffle slab being made up of parallel lines in the position of photosensitive CCD, lines are printing opacity and light tight in succession.It is symmetrically positioned two photo detectors on appropriate location with optical axis after network board.Network board is of reciprocating vibration with in optical axis vertical direction.When focusing surface overlaps with network board, arrive two photo detectors behind by the light of waffle slab printing opacity lines simultaneously.And when out of focus, light beam can only successively arrive two photo detectors, then there is phase contrast between their output signal.Dephased two signals can control actuator to regulate the position of object lens after processing of circuit, makes the planes overlapping of focusing surface and waffle slab.
But, various auto-focusing modes are respectively arranged with its limitation.The focusing method of such as infrared distance measurement and supersonic sounding, when measured target has stronger Absorption to infrared light or ultrasound wave, will make range-measurement system malfunctioning or focus inaccurate；And contrast method focus detection is restricted by illumination condition, when dark is weak or subject is the least with background shade distinctions, focusing will be had any problem, the most ineffective.
When user uses the mobile phone photograph with automatic focusing function, mobile phone first starts auto-focusing, at this moment mobile phone constantly calculates various parameter according to the focus algorithm of self, to judge whether to complete focusing and the need of continuing focusing, when but occasional runs into situations below shooting at close range scenery, different minutiae point clapped by trickle cell phone, now the auto-focusing of mobile phone insensitive, not even auto-focusing.Such as when adept machine closely claps a blank sheet of paper, Mobile phone automatic focusing at the beginning, then horizontal the most slowly cell phone, now the mobile phone distance away from blank sheet of paper is constant, result mobile phone not auto-focusing.
Summary of the invention
It is an object of the invention to provide method, system and the mobile terminal of a kind of susceptiveness strengthening Mobile phone automatic focusing.
The present invention is achieved in that a kind of method strengthening auto-focusing, said method comprising the steps of:
Mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value；
The numerical value of reading is contrasted with default initial value；
When moving end in mobile status when judging in focusing, then it is again started up auto-focusing；
When mobile terminal is not at mobile status when judging in focusing, then keep original focusing state.
Another object of the present invention is to provide a kind of system strengthening auto-focusing, described system includes:
Read module, enters camera function for mobile terminal, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value；
Contrast module, for contrasting the numerical value of reading with default initial value；
Focusing control module, during for moving end in mobile status when judging in focusing, is then again started up auto-focusing；When mobile terminal is not at mobile status when judging in focusing, then keep original focusing state.
Another object of the present invention is to provide the mobile terminal of a kind of system including enhancing auto-focusing recited above.
In the present invention, mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value, and it is contrasted with default initial value, when judging that mobile terminal is in mobile status, be then again started up auto-focusing；When judging that mobile terminal is not at mobile status, then keep original focusing state.Technical scheme according to embodiments of the present invention thus judge whether to need to be again started up auto-focusing, thus when solving the shooting at close range scenery that prior art exists, different minutiae point clapped by trickle cell phone, now the auto-focusing of mobile phone insensitive, not even auto-focusing.Such as when adept machine closely claps a blank sheet of paper, Mobile phone automatic focusing at the beginning, then horizontal the most slowly cell phone, now the mobile phone distance away from blank sheet of paper is constant, the problem of result mobile phone not auto-focusing.The embodiment of the present invention strengthens the susceptiveness of mobile terminal auto-focusing.
Accompanying drawing explanation
Fig. 1 be the embodiment of the present invention provide strengthen auto-focusing method realize schematic flow sheet.
Fig. 2 is the structural representation of the system strengthening auto-focusing that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, read induction apparatus numerical value, and it is contrasted with default initial value, when judging that mobile terminal is in mobile status, then it is again started up auto-focusing；When judging that mobile terminal is not at mobile status, then keep original focusing state.Technical scheme according to embodiments of the present invention thus judge whether to need to be again started up auto-focusing, thus when solving the shooting at close range scenery that prior art exists, different minutiae point clapped by trickle cell phone, now the auto-focusing of mobile phone insensitive, not even auto-focusing.Such as when adept machine closely claps a blank sheet of paper, Mobile phone automatic focusing at the beginning, then horizontal the most slowly cell phone, now the mobile phone distance away from blank sheet of paper is constant, the problem of result mobile phone not auto-focusing.The embodiment of the present invention strengthens the susceptiveness of mobile terminal auto-focusing.
Refer to Fig. 1, for the embodiment of the present invention provide strengthen auto-focusing method realize flow process, it mainly comprises the steps that
In step S101, mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value；
In embodiments of the present invention, described induction apparatus is gyroscope.
In embodiments of the present invention, mobile terminal enters camera function, starts auto-focusing, and focusing completes, and mobile terminal auto-focusing algorithm calculates the need of continuing focusing, the most then continue auto-focusing, if need not, then reads induction apparatus numerical value.
In step s 102, the numerical value of reading is contrasted with default initial value；
In embodiments of the present invention, initial value is determined by test, specific as follows when user's hand-held mobile terminal is taken pictures, hands meeting slight jitter, tests out now induction apparatus numerical value, is designated as A；Test out induction apparatus numerical value when user the most slightly moves when not auto-focusing just occurs in mobile terminal, be designated as B；Default initial value is then to take certain value between A and B, under normal circumstances A < B, and concrete value is depending on practical situation.
In step s 103, when moving end in mobile status when judging in focusing, then auto-focusing it is again started up；
In step S104, when mobile terminal is not at mobile status when judging in focusing, then keep original focusing state.
In embodiments of the present invention, when the numerical value read is more than when presetting initial value, then judge to move end in mobile status when focusing；When the numerical value read is less than when presetting initial value, then judge that mobile terminal is not at mobile status when focusing.
In embodiments of the present invention, mobile terminal camera driver adds and reads relevant induction apparatus numerical value and this numerical value and default initial value are carried out the function contrasted, thus judge whether user mobile phone is in mobile status when focusing, thus judge the need of being again started up auto-focusing.
Refer to Fig. 2, for the structure of the system strengthening auto-focusing that the embodiment of the present invention provides.For convenience of description, illustrate only the part relevant to the embodiment of the present invention.The system of described enhancing auto-focusing specifically includes that read module 101, contrast module 102 and focusing control module 103.
Read module 101, enters camera function for mobile terminal, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value；
Contrast module 102, for contrasting the numerical value of reading with default initial value；
Focusing control module 103, during for moving end in mobile status when judging in focusing, is then again started up auto-focusing；When mobile terminal is not at mobile status when judging in focusing, then keep original focusing state.
In embodiments of the present invention, when the numerical value read is more than when presetting initial value, then judge to move end in mobile status when focusing；When the numerical value read is less than when presetting initial value, then judge that mobile terminal is not at mobile status when focusing.
In sum, the mobile terminal of the embodiment of the present invention enters camera function, when not continuing to auto-focusing after completing auto-focusing, read induction apparatus numerical value, and it is contrasted with default initial value, when judging that mobile terminal is in mobile status, then it is again started up auto-focusing；When judging that mobile terminal is not at mobile status, then keep original focusing state.Technical scheme according to embodiments of the present invention thus judge whether to need to be again started up auto-focusing, thus when solving the shooting at close range scenery that prior art exists, different minutiae point clapped by trickle cell phone, now the auto-focusing of mobile phone insensitive, not even auto-focusing.Such as when adept machine closely claps a blank sheet of paper, Mobile phone automatic focusing at the beginning, then horizontal the most slowly cell phone, now the mobile phone distance away from blank sheet of paper is constant, the problem of result mobile phone not auto-focusing.The embodiment of the present invention strengthens the susceptiveness of mobile terminal auto-focusing.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method can be by program and completes to instruct relevant hardware, described program can be stored in a computer read/write memory medium, described storage medium, such as ROM/RAM, disk, CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (4)
1. the method strengthening auto-focusing, it is characterised in that said method comprising the steps of:
Mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value, and described induction apparatus is gyroscope；
The numerical value of reading is contrasted with default initial value；The sampling process of described default initial value is as follows: when user's hand-held mobile terminal is taken pictures, hands can slight jitter, test out now induction apparatus numerical value be designated as A；Testing out induction apparatus numerical value when user the most slightly moves when not auto-focusing just occurs in mobile terminal and be designated as B, wherein, B is more than A；Preset initial value more than A and less than B；
When the numerical value read is more than when presetting initial value, it is judged that move end in mobile status when focusing, and be again started up auto-focusing；
When the numerical value read is less than when presetting initial value, it is judged that when focusing, mobile terminal is not at mobile status, and keeps original focusing state.
2. the method for claim 1, it is characterised in that described mobile terminal enters camera function, when not continuing to auto-focusing after completing auto-focusing, reads the step of induction apparatus numerical value, particularly as follows:
Mobile terminal enters camera function, starts auto-focusing, and focusing completes, and mobile terminal auto-focusing algorithm calculates the need of continuing focusing, the most then continue auto-focusing, if need not, then reads induction apparatus numerical value.
3. the system strengthening auto-focusing, it is characterised in that described system includes:
Read module, enters camera function for mobile terminal, when not continuing to auto-focusing after completing auto-focusing, reads induction apparatus numerical value, and described induction apparatus is gyroscope；
Contrast module, for contrasting the numerical value of reading with default initial value；The sampling process of described default initial value is as follows: when user's hand-held mobile terminal is taken pictures, hands can slight jitter, test out now induction apparatus numerical value be designated as A；Testing out induction apparatus numerical value when user the most slightly moves when not auto-focusing just occurs in mobile terminal and be designated as B, wherein, B is more than A；Preset initial value more than A and less than B；
Focusing control module, for when the numerical value read is more than when presetting initial value, it is judged that move end in mobile status when focusing, and be again started up auto-focusing；When the numerical value read is less than when presetting initial value, it is judged that when focusing, mobile terminal is not at mobile status, and keeps original focusing state.
4. the mobile terminal of the system strengthening auto-focusing included described in claim 3.
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| CN102053458A (en) * | 2009-10-30 | 2011-05-11 | 宏达国际电子股份有限公司 | Method for capturing image and portable communication device |
| CN102104723A (en) * | 2009-12-22 | 2011-06-22 | 深圳富泰宏精密工业有限公司 | Focusing function enabling system and method |
| CN102122107A (en) * | 2010-01-08 | 2011-07-13 | 深圳富泰宏精密工业有限公司 | Photographing system and method |
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| JP5653636B2 (en) * | 2010-02-26 | 2015-01-14 | オリンパスイメージング株式会社 | Focus control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102053458A (en) * | 2009-10-30 | 2011-05-11 | 宏达国际电子股份有限公司 | Method for capturing image and portable communication device |
| CN102104723A (en) * | 2009-12-22 | 2011-06-22 | 深圳富泰宏精密工业有限公司 | Focusing function enabling system and method |
| CN102122107A (en) * | 2010-01-08 | 2011-07-13 | 深圳富泰宏精密工业有限公司 | Photographing system and method |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. Address before: Changan town in Guangdong province Dongguan 523841 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. |