CN104159027B - A kind of method and device according to picture pace of change automatic camera - Google Patents
A kind of method and device according to picture pace of change automatic camera Download PDFInfo
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- CN104159027B CN104159027B CN201410404932.2A CN201410404932A CN104159027B CN 104159027 B CN104159027 B CN 104159027B CN 201410404932 A CN201410404932 A CN 201410404932A CN 104159027 B CN104159027 B CN 104159027B
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Abstract
The invention discloses a kind of methods according to picture pace of change automatic camera, applied in the intelligent camera installation with parsing preview screen data function, including the following steps: S1, intelligent camera installation enter photographing mode, and focusing unit carries out auto-focusing；Whether S2, the space shooting shutter for detecting the intelligent camera installation are pressed；S3, intelligent camera installation obtain preview screen data information, then it is handled according to the variation of preview screen data information, if the value T of preview screen data information pace of change is greater than pre-set threshold value T0, intelligent camera installation enters the mode of automatic simple focusing and automatic camera；S4, the triggering intelligent camera installation are taken pictures.This method passes through the pace of change of phase machine testing preview screen, and comes automatic trigger focusing and photographing operation with this, accurately and quickly catches transient scene, the user experience is improved；Such new photographing mode, enriches the camera function of camera.
Description
Technical field
It is the present invention relates to the technical field of intelligent camera installation, in particular to a kind of according to picture pace of change automatic camera
Method and device.
Background technique
People are frequently encountered many splendid moments in daily life and work usually, be intended to be able to use with
The instant candid photograph of the mobile phone with camera function or digital camera that body carries is got off.Mobile phone camera currently on the market or
Digital camera is taken pictures for some relatively-stationary scenes, can there is good performance, but if it is some fields in variation
Scape, such as an automobile under steam, or be in the space for having shelter, at this point, the scene of shooting may be
It will be disappeared in after several seconds inside the visual field of camera, and according to traditional shooting style --- enter camera, focusing, bat
According to after this series of operation, it is likely that the picture for needing to keep here has disappeared, that is, allows to snap some scenes,
Probably due to being nervously fumbled, cause picture very fuzzy.
Chinese invention patent discloses " camera system and method " (Publication No. CN201010300126), the skill of the patent
Art scheme comprises the concrete steps that: (a1) when the camera arrangement enters photographing mode, the focusing unit of the camera arrangement is carried out
Auto-focusing；(a2) whether the space shooting shutter for detecting the camera arrangement is pressed, if being pressed, thens follow the steps (a7), no
Then follow the steps (a3)；(a3) acceleration transducer senses the camera arrangement in the mobile acceleration in direction of taking pictures in real time
Size and acceleration direction；(a4) it is mobile in direction of taking pictures that the camera arrangement that the acceleration transducer is sensed is obtained in real time
Acceleration magnitude and acceleration direction；(a5) whether the acceleration magnitude for judging above-mentioned acquisition is more than preset acceleration threshold
Value, if being more than, thens follow the steps (a6), otherwise, return step (a2)；(a6) if the acceleration of above-mentioned acquisition is negative sense acceleration
Degree, then the zoom unit for triggering the camera arrangement amplifies zoom to the camera arrangement, if it is positive acceleration,
It triggers the zoom unit and diminution zoom, return step (a1) is carried out to the camera arrangement；(a7) camera arrangement is triggered
It takes pictures.Pass through analysis, it is known that the technical solution is substantially to sense the camera arrangement in real time by acceleration transducer to exist
The mobile acceleration magnitude in direction of taking pictures and acceleration direction to drive triggering camera camera function automatically, but do not provide
Camera is driven to realize that the technology of automatic trigger camera function is opened about the variation size of object preview screen by camera
Show.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology and deficiency, provides a kind of automatic according to picture pace of change
The method taken pictures.This method realizes a kind of function of automatic camera, mainly for the scene of high speed variation, when object enters phase
After machine, the pace of change of phase chance detection preview screen is automatically performed basic focusing if pace of change is higher, and
It is automatically performed shutter to take pictures, thus can capture the excellent picture to needs in the shortest time.
It is another object of the present invention to, with deficiency, provide a kind of according to picture variation speed the shortcomings that overcoming the prior art
Spend the device of automatic camera.
The purpose of the invention is achieved by the following technical solution:
A method of according to picture pace of change automatic camera, applied to the intelligence with parsing preview screen data function
In energy camera installation, characterized in that it comprises the following steps:
S1, intelligent camera installation enter photographing mode, while the focusing unit of the intelligence camera installation carries out auto-focusing；
Whether S2, the space shooting shutter for detecting the intelligent camera installation are pressed, if being pressed, then follow the steps S4, no
Then follow the steps S3；
S3, intelligent camera installation obtain preview screen data information, then according to the variation of preview screen data information into
Row processing, if the value T of preview screen data information pace of change is greater than pre-set threshold value T0, intelligent camera installation into
Enter the mode of automatic simple focusing and automatic camera；
S4, the triggering intelligent camera installation are taken pictures.
Preferably, the pace of change T calculating process of preview screen data information is specific as follows in the step S3:
The camera lens of the acquisition of S31, preview screen image data information, intelligent camera installation takes out preview screen image
Sample acquisition, i.e., it is average then by the way of data information sampling based on the pixel unit of intelligent camera installation display screen
Extract wherein fixed N number of point, wherein the number of sample point can according to the information processing performance height of intelligent camera installation come
Reasonable setting；
The image table of S32, intelligent camera installation color of each pixel sampled and the specified specification of brightness by this
Show that mode temporarily stores, is recorded as array Array1, the color and brightness value of sampling pixels all in this way
It is indicated with an array comprising N number of element；
After A milliseconds S33, interval of specified time interval, the camera lens of intelligent camera installation carries out primary according still further to step S32
Acquisition, records the color and brightness value of identical N number of fixed pixel point, is recorded as array Array2, wherein specified time interval A
It is pre-set；
S34, the absolute difference for calculating each corresponding element in array Array1 and Array2, and N number of difference
The summation of absolute value calculate and store, SUM is recorded as, by SUM divided by the summation of all elements quantity of array Array
N, it can obtain the pace of change T of interval A milliseconds of front and back picture of specified time.
Preferably, for indicating the color of the pixel of each sampling and the specified specification of brightness in the step S32
Image representation include 64 grades of gray scales, 256 grades of gray scales, 24 true color, 32 true color and 64 true color.
Preferably, intelligent camera installation display screen is 800*480 screen in the step S31, then has 800*480 pixel
Unit selects primary at interval of 10 point samplings；
The color for the pixel that each in the step S32 is sampled and brightness specify the mode of 24 true color to indicate,
The data for being then converted to 3 bytes are stored in intelligent camera installation；
It is preset in the step S33 and is divided into 100ms between the picture reduced time.
Preferably, the intelligent camera installation includes mobile phone, tablet computer and digital camera with camera function.
A kind of device according to picture pace of change automatic camera, applied to the intelligence with parsing preview screen data function
In energy camera installation, including following devices:
Photographing mode preparation device, which is used for intelligent camera installation and enters photographing mode, while intelligence photograph is set
Standby focusing unit carries out auto-focusing；
Whether space shooting shutter monitoring device, the space shooting shutter which is used to detect the intelligent camera installation are pressed；
Camera installation self-timer mode trigger device, the device are used for intelligent camera installation and obtain preview screen data information,
Then it is handled according to the variation of preview screen data information, if the value T of preview screen data information pace of change is greater than
Pre-set threshold value T0, then intelligent camera installation enters the mode of automatic simple focusing and automatic camera；
Camera installation camera arrangement, the device are taken pictures for triggering the intelligent camera installation.
Preferably, the camera installation self-timer mode trigger device specifically includes following devices:
Preview screen image data acquisition device, the device are used for the acquisition of preview screen image data information, intelligence
The camera lens of energy camera installation is sampled acquisition to preview screen image, i.e., is with the pixel unit of intelligent camera installation display screen
Basis, average to extract wherein fixed N number of point then by the way of data information sampling, wherein the number of sample point can be with
Reasonably it is arranged according to the information processing performance height of intelligent camera installation；
Preview screen image data information first storage device, the device are used for what intelligent camera installation sampled each
The color of pixel and brightness are temporarily stored with the image representation of specified specification, are recorded as array Array1, in this way
The color and brightness value of all sampling pixels can be indicated with an array comprising N number of element；
The second storage device of preview screen image data information, the device are used in interval specified time interval A millisecond
Afterwards, the camera lens of intelligent camera installation passes through preview screen image data information first storage device again and carries out one acquisition, records
The color and brightness value of identical N number of fixed pixel point, are recorded as array Array2, wherein specified time interval A is to set in advance
It sets；
The pace of change T computing device of preview screen image data information, the device for calculate array Array1 and
The absolute difference of each corresponding element in Array2, and the summation of the absolute value of N number of difference is calculated and stored,
It is recorded as SUM, by SUM divided by the summation N of all elements quantity of array Array, it can obtain interval A milliseconds of specified time
The pace of change T of front and back picture.
Preferably, for indicating the pixel of each sampling in the preview screen image data information first storage device
The image representation of the specified specification of the color and brightness of point includes 64 grades of gray scales, 256 grades of gray scales, 24 true color, 32
True color and 64 true color.
The present invention has the following advantages and effects with respect to the prior art:
1, the present invention is independent of hardware adaptors such as acceleration transducers, do not need yet it is artificial remove moving operation mobile phone,
It only needs to work in normal photographing mode, the algorithm of principle and use by software realization, can be applied completely
In more scenes.
2, the present invention is applicable in the scene environment that needs are captured the most, in daily life, encounters some slightly indulge i.e.
The scene to die, it is only necessary to which opening camera can record, and use very simple.
3, it the invention proposes the new photographing mode according to preview screen data variation speed automatic trigger, can be added to
In numerous photographing modes of present camera, so that user there are more selections when using camera, enrich the bat of camera
According to function, the user experience is improved spends.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram according to picture pace of change automatic camera of the present invention.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment one
The invention discloses a kind of method according to picture pace of change automatic camera, it is applied to that there is parsing preview screen
In the intelligent camera installation of data function, wherein the intelligence camera installation includes mobile phone, tablet computer with camera function
And digital camera.Intelligence camera installation described in the present embodiment one is the mobile phone with camera function.
Specific step is as follows for this method:
Step S1, intelligent camera installation enters photographing mode, while the focusing unit of the intelligence camera installation carries out automatically
Focusing.
Step S2, whether the space shooting shutter for detecting the intelligent camera installation is pressed, if being pressed, thens follow the steps
S4, it is no to then follow the steps S3.
Step S3, intelligent camera installation obtains preview screen data information, then according to the change of preview screen data information
Change is handled, if the value T of preview screen data information pace of change is greater than pre-set threshold value T0, intelligence photograph is set
The standby mode for entering automatic simple focusing and automatic camera.
Wherein the pace of change T calculating process of preview screen data information is specific as follows:
The camera lens of the acquisition of S31, preview screen image data information, intelligent camera installation takes out preview screen image
Sample acquisition, i.e., it is average then by the way of data information sampling based on the pixel unit of intelligent camera installation display screen
Extract wherein fixed N number of point, wherein the number of sample point can according to the information processing performance height of intelligent camera installation come
Reasonable setting.
The image table of S32, intelligent camera installation color of each pixel sampled and the specified specification of brightness by this
Show that mode temporarily stores, is recorded as array Array1, the color and brightness value of sampling pixels all in this way
It is indicated with an array comprising N number of element；The image representation for wherein specifying specification includes 64 grades of gray scales, 256 grades of ashes
Degree, 24 true color, 32 true color and 64 true color specify the mode of 24 true color to indicate in the present embodiment one,
The data for being then converted to 3 bytes are stored in intelligent camera installation.
After A milliseconds S33, interval of specified time interval, the camera lens of intelligent camera installation carries out primary according still further to step S32
Acquisition, records the color and brightness value of identical N number of fixed pixel point, is recorded as array Array2, wherein specified time interval A
It is pre-set.
S34, the absolute difference for calculating each corresponding element in array Array1 and Array2, and N number of difference
The summation of absolute value calculate and store, SUM is recorded as, by SUM divided by the summation of all elements quantity of array Array
N, it can obtain the pace of change T of interval A milliseconds of front and back picture of specified time.
Step S4, the intelligent camera installation is triggered to take pictures.
After completing once photo taking, then reenters step S3 and start the cycle over, until exiting camera.
However, because high-speed motion picture may be very big in the image actually difference that double sampling obtains, institute
It can carry out simplifying processing with the pace of change T calculating process of preview screen data information, preview screen data information after simplifying
Pace of change T calculating process it is as follows:
A, simplifying number of sampling points, the image information that first will acquire before treatment is pre-processed, i.e., is first reduced the size,
As the resolution ratio of 800*480 can narrow down to the size of 80*48；
B, simplify color, converting 64 grades of gray scales for the picture after diminution (also can be used 128 or 32 or others
Series), i.e., all pixels only have 64 kinds of colors in total, and the image that such camera obtains can be reduced to comprising 80*48
Integer element, each elemental range only have 0 --- and 64 array, data to be treated are very simple；
C, the summation of all elements in this array is calculated, so that it may obtain the integer for representing current picture information
SUM1；
D, it is spaced after 100ms, calculates the integer SUM2 for representing next image information again according to process above, this
Sample can simply carry out data and compare very much.
In conclusion a kind of method according to picture pace of change automatic camera, passes through the mutually confidential of intelligent camera installation
The data of preview screen can be parsed, the specific value that can represent the speed of preview screen content change is calculated with this；Phase
Machine also wants that focusing and the operation of shutter can be automatically performed in the shorter time, of course, it is possible to do not require focusing very accurate, but
It is also required for higher quality.
Embodiment two
Present embodiment discloses a kind of device according to picture pace of change automatic camera, it is applied to that there is parsing preview to draw
In the intelligent camera installation of face data function, wherein the intelligence camera installation includes mobile phone, plate electricity with camera function
Brain and digital camera.
Device disclosed in the present embodiment includes: again
1, photographing mode preparation device, which is used for intelligent camera installation and enters photographing mode, while this is intelligently taken a picture
The focusing unit of equipment carries out auto-focusing.
2, whether space shooting shutter monitoring device, the space shooting shutter which is used to detect the intelligent camera installation are pressed
Under.
3, camera installation self-timer mode trigger device, the device are used for intelligent camera installation and obtain preview screen data letter
Breath, is then handled according to the variation of preview screen data information, if the value T of preview screen data information pace of change is big
In pre-set threshold value T0, then intelligent camera installation enters the mode of automatic simple focusing and automatic camera.
Wherein, camera installation self-timer mode trigger device specifically includes following devices:
(1) preview screen image data acquisition device, the device are used for the acquisition of preview screen image data information,
The camera lens of intelligent camera installation is sampled acquisition to preview screen image, i.e., with the pixel unit of intelligent camera installation display screen
Based on, then by the way of data information sampling, average to extract wherein fixed N number of point, wherein the number of sample point can
To be reasonably arranged according to the information processing performance height of intelligent camera installation；In the embodiment two, intelligent camera installation is aobvious
Display screen is 800*480 screen, then has 800*480 pixel unit, is selected primary at interval of 10 point samplings.
(2) preview screen image data information first storage device, the device are used for intelligent camera installation and take out each
The color of the pixel of sample and brightness are temporarily stored with the image representation of specified specification, are recorded as array Array1,
The color and brightness value of sampling pixels all in this way can be indicated with an array comprising N number of element；
Wherein for indicating the image representation packet of the color of the pixel of each sampling and the specified specification of brightness
Include 64 grades of gray scales, 256 grades of gray scales, 24 true color, 32 true color and 64 true color, in the present embodiment two, each
The color of the pixel of sampling and brightness specify the mode of 24 true color to indicate, are then converted to the data storage of 3 bytes
In intelligent camera installation.
(3) the second storage device of preview screen image data information, the device are used at A milliseconds of the specified time interval in interval
Later, the camera lens of intelligent camera installation passes through preview screen image data information first storage device again and carries out one acquisition, remembers
The color and brightness value for recording identical N number of fixed pixel point, are recorded as array Array2, wherein specified time interval A is preparatory
It is arranged；In the present embodiment two, presets and be divided into 100ms between the picture reduced time.
(4) the pace of change T computing device of preview screen image data information, the device for calculate array Array1 and
The absolute difference of each corresponding element in Array2, and the summation of the absolute value of N number of difference is calculated and stored,
It is recorded as SUM, by SUM divided by the summation N of all elements quantity of array Array, it can obtain interval A milliseconds of specified time
The pace of change T of front and back picture.
4, camera installation camera arrangement, the device are taken pictures for triggering the intelligent camera installation.
It is noted that in above-mentioned apparatus embodiment, included modules and unit only according to function logic into
What row divided, but be not limited to the above division, as long as corresponding functions can be realized；In addition, each functional module and
The specific name of unit is also only for convenience of distinguishing each other, the protection scope being not intended to restrict the invention.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (6)
1. a kind of method according to picture pace of change automatic camera, applied to the intelligence with parsing preview screen data function
In camera installation, characterized in that it comprises the following steps:
S1, intelligent camera installation enter photographing mode, while the focusing unit of the intelligence camera installation carries out auto-focusing；
Whether S2, the space shooting shutter for detecting the intelligent camera installation are pressed, if being pressed, then follow the steps S4, otherwise hold
Row step S3；
S3, intelligent camera installation obtain preview screen data information, then according to the variation of preview screen data information at
Reason, if the value T of preview screen data information pace of change is greater than pre-set threshold value T0, intelligent camera installation enters certainly
The mode of dynamic simple focusing and automatic camera；
S4, the triggering intelligent camera installation are taken pictures；
The pace of change T calculating process of preview screen data information is as follows: averagely N number of picture fixed in extraction preview screen image
The color and brightness value of vegetarian refreshments；After being spaced specified time interval, N number of pixel fixed in preview screen image is averagely extracted again
The color and brightness value of point；The absolute difference of each corresponding element in the N number of pixel extracted twice is calculated, and is calculated
The summation SUM of N number of absolute difference, by SUM divided by the summation N of all elements quantity, it can before obtaining specified time interval
The pace of change T of picture afterwards；
The pace of change T calculating process of preview screen data information is specific as follows in the step S3:
The acquisition of S31, preview screen image data information, the camera lens of intelligent camera installation, which is sampled preview screen image, to be adopted
Collection, i.e., it is average to extract then by the way of data information sampling based on the pixel unit of intelligent camera installation display screen
Wherein fixed N number of point, wherein the number of sample point can be according to the information processing performance height of intelligent camera installation come rationally
Setting；
S32, intelligent camera installation color of each pixel sampled and the brightness image side of expression of specified specification by this
Formula temporarily stores, and is recorded as array Array1, and the color and brightness value of sampling pixels all in this way can use one
A array comprising N number of element indicates；
After A milliseconds S33, interval of specified time interval, the camera lens of intelligent camera installation is once adopted according still further to step S32
Collection, records the color and brightness value of identical N number of fixed pixel point, is recorded as array Array2, wherein specified time interval A is
It is pre-set；
S34, the absolute difference for calculating each corresponding element in array Array1 and Array2, and the exhausted of N number of difference
The summation of value is calculated and stored, SUM is recorded as, by SUM divided by the summation N of all elements quantity of array Array, i.e.,
It can be concluded that the pace of change T of interval A milliseconds of front and back picture of specified time.
2. a kind of method according to picture pace of change automatic camera according to claim 1, it is characterised in that:
For indicating the image expression side of the color of the pixel of each sampling and the specified specification of brightness in the step S32
Formula includes 64 grades of gray scales, 256 grades of gray scales, 24 true color, 32 true color and 64 true color.
3. a kind of method according to picture pace of change automatic camera according to claim 1, it is characterised in that:
Intelligent camera installation display screen is 800*480 screen in the step S31, then has 800*480 pixel unit, and selection is every
It is primary to be spaced 10 point samplings；
The color for the pixel that each in the step S32 is sampled and brightness specify the mode of 24 true color to indicate, then
The data for being converted into 3 bytes are stored in intelligent camera installation；
It is preset in the step S33 and is divided into 100ms between the picture reduced time.
4. a kind of method according to picture pace of change automatic camera according to any one of claims 1 to 3, feature exist
In:
The intelligence camera installation includes mobile phone, tablet computer and digital camera with camera function.
5. a kind of device according to picture pace of change automatic camera, applied to the intelligence with parsing preview screen data function
In camera installation, which is characterized in that including following devices:
Photographing mode preparation device, the device are used for intelligent camera installation and enter photographing mode, while the intelligence camera installation
Focusing unit carries out auto-focusing；
Whether space shooting shutter monitoring device, the space shooting shutter which is used to detect the intelligent camera installation are pressed；
Camera installation self-timer mode trigger device, the device are used for intelligent camera installation and obtain preview screen data information, then
It is handled according to the variation of preview screen data information, if the value T of preview screen data information pace of change is greater than in advance
The threshold value T0 of setting, then intelligent camera installation enters the mode of automatic simple focusing and automatic camera；
Camera installation camera arrangement, the device are taken pictures for triggering the intelligent camera installation；
The pace of change T calculating process of preview screen data information is as follows: averagely N number of picture fixed in extraction preview screen image
The color and brightness value of vegetarian refreshments；After being spaced specified time interval, N number of pixel fixed in preview screen image is averagely extracted again
The color and brightness value of point；The absolute difference of each corresponding element in the N number of pixel extracted twice is calculated, and is calculated
The summation SUM of N number of absolute difference, by SUM divided by the summation N of all elements quantity, it can before obtaining specified time interval
The pace of change T of picture afterwards；
The camera installation self-timer mode trigger device specifically includes following devices:
Preview screen image data acquisition device, the device are used for the acquisition of preview screen image data information, and intelligence is shone
The camera lens of phase equipment is sampled acquisition to preview screen image, i.e., using the pixel unit of intelligent camera installation display screen as base
Plinth, then by the way of data information sampling, average to extract wherein fixed N number of point, wherein the number of sample point can root
Reasonably it is arranged according to the information processing performance height of intelligent camera installation；
Preview screen image data information first storage device, the device are used for the pixel that intelligent camera installation samples each
The color of point and brightness are temporarily stored with the image representation of specified specification, are recorded as array Array1, all in this way
Sampling pixel color and brightness value can be indicated with an array comprising N number of element；
The second storage device of preview screen image data information, the device are used for the intelligence after being spaced A milliseconds of specified time interval
The camera lens of energy camera installation passes through preview screen image data information first storage device again and carries out one acquisition, records identical
The color and brightness value of N number of fixed pixel point, are recorded as array Array2, wherein specified time interval A is pre-set；
The pace of change T computing device of preview screen image data information, the device is for calculating array Array1 and Array2
In each corresponding element absolute difference, and the summation of the absolute value of N number of difference is calculated and is stored, be recorded as
SUM, by SUM divided by the summation N of all elements quantity of array Array, it can show that interval A milliseconds of front and back of specified time is drawn
The pace of change T in face.
6. a kind of device according to picture pace of change automatic camera according to claim 5, it is characterised in that:
In the preview screen image data information first storage device for indicate each sampling pixel color and
The image representation of the specified specification of brightness include 64 grades of gray scales, 256 grades of gray scales, 24 true color, 32 true color and
64 true color.
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