CN109995992A - Image-pickup method and device, computer readable storage medium - Google Patents
Image-pickup method and device, computer readable storage medium Download PDFInfo
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- CN109995992A CN109995992A CN201810002084.0A CN201810002084A CN109995992A CN 109995992 A CN109995992 A CN 109995992A CN 201810002084 A CN201810002084 A CN 201810002084A CN 109995992 A CN109995992 A CN 109995992A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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Abstract
A kind of image-pickup method and device, computer readable storage medium, which comprises control image acquisition device image, described image acquisition device are placed vertically；Obtain described image acquisition device acquired image；Accessed image is rotated, postrotational narrow picture is obtained；The postrotational narrow picture is cut, the facial image of pre-set dimension is obtained.Using the above scheme, Image Acquisition operation can be simplified.
Description
Technical field
The present embodiments relate to image acquisition technology more particularly to a kind of image-pickup methods and device, calculating
Machine readable storage medium storing program for executing.
Background technique
Currently, since the height of image personnel to be collected is different, generalling use following two side in image acquisition process
Formula solves the height different problems of image personnel to be collected.Mode one, according to the height situation tune of collected image personnel
The height of whole camera.Mode two carries out Image Acquisition using binocular camera, and binocular camera acquisition equipment is taken the photograph using two-way
As head acquires image simultaneously.
However, mode one, needs to adjust camera position, operation according to personnel's height to be collected in image acquisition process
It is relatively complicated.Mode two, it is larger and higher to the performance requirement of equipment that binocular camera image capture device configures difficulty.
To sum up, complicated operation for current image-pickup method.
Summary of the invention
The technical issues of embodiment of the present invention solves is how to simplify Image Acquisition operation.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of image-pickup method, comprising: control Image Acquisition
Device acquires image, and described image acquisition device is placed vertically；Obtain described image acquisition device acquired image；To being obtained
The image got is rotated, and postrotational narrow picture is obtained；The postrotational narrow picture is cut, is obtained pre-
If the facial image of size.
Optionally, before controlling image acquisition device image, further includes: point of configuration described image acquisition device
Resolution, and dicode stream format is configured by codec format, the dicode stream format includes: the code stream and the second lattice of the first format
The code stream of formula, and the corresponding compression ratio of code stream of first format is less than the compression ratio of the code stream of second format.
Optionally, after obtaining image collecting device institute acquired image, further includes: to accessed image into
Row recognition of face, when detecting described image is facial image, codec format is switched to by control described image acquisition device
The code stream of first format；It is after codec format to be switched to the code stream of the first format, described image acquisition device institute is collected
Image is as accessed image.
Optionally, described image acquisition method further include: when detecting described image is inhuman face image, described in control
Codec format is switched to the code stream of the second format by image collecting device.
Optionally, the code stream of first format is the code stream of YUY2 format.
Optionally, the code stream of second format is the code stream or the H.264 code stream of format of MJPG format.
Optionally, described that the postrotational narrow picture is cut, the facial image of pre-set dimension is obtained, is wrapped
It includes: Face datection being carried out to postrotational narrow picture, and carries out facial modeling；The face characteristic obtained according to positioning
Point cuts the narrow picture, obtains the facial image of pre-set dimension.
The embodiment of the present invention also provides a kind of image collecting device, comprising: control unit, acquiring unit, rotary unit with
And cut unit, wherein described control unit is suitable for control image acquisition device image, and described image acquisition device is perpendicular
It is straight to place；The acquiring unit is suitable for obtaining described image acquisition device acquired image；The rotary unit, be suitable for pair
Accessed image is rotated, and postrotational narrow picture is obtained；The cutting unit is suitable for described postrotational narrow
Width image is cut, and the facial image of pre-set dimension is obtained.
Optionally, described image acquisition device, further includes: configuration unit is suitable in control image acquisition device figure
Before picture, the resolution ratio of described image acquisition device is configured, and configures dicode stream format, the dual code stream lattice for codec format
Formula includes: the code stream of the first format and the code stream of the second format, and the corresponding compression ratio of code stream of first format is less than
The compression ratio of the code stream of second format.
Optionally, described image acquisition device, further includes: the first switch unit is suitable for obtaining image collecting device institute
After acquired image, recognition of face is carried out to accessed image, when detecting described image is facial image, control
Codec format is switched to the code stream of the first format by described image acquisition device processed；The acquiring unit is suitable for described first
After codec format is switched to the code stream of the first format by switch unit, using described image acquisition device institute's acquired image as
Accessed image.
Optionally, described image acquisition device, further includes: the second switch unit detects that described image is non-suitable for working as
When facial image, codec format is switched to the code stream of the second format by control described image acquisition device.
Optionally, the cutting unit is suitable for carrying out Face datection to postrotational narrow picture, and carries out face characteristic
Point location；According to the human face characteristic point that positioning obtains, the narrow picture is cut, the face figure of pre-set dimension is obtained
Picture.
The embodiment of the present invention also provides a kind of image collecting device, including memory and processor, deposits on the memory
The computer instruction that can be run on the processor is contained, the processor executes above-mentioned when running the computer instruction
The step of any image-pickup method.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored thereon with computer instruction, feature
It is, the step of executing any of the above-described kind of image-pickup method when the computer instruction is run.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that
Image collecting device is placed vertically, and acquired image is rotated to obtain narrow picture, to acquired
Narrow picture cut, to obtain the facial image of pre-set dimension.When being placed vertically due to image collecting device, perpendicular
The altitude range that histogram acquires upwards is larger, by the rotation processing to image, so as to meet different height people to be collected
Member, Image Acquisition operation are relatively simple.
Further, when acquired image is facial image, codec format is switched to by control image collecting device
The code stream of lesser first format of compression ratio, can be improved the clarity of institute's acquired image in this way, obtain more high definition
Image.
Further, when acquired image is inhuman face image, control image collecting device switches codec format
For the code stream of biggish second format of compression ratio, the fluency of the picture of institute's acquired image can be improved in this way.
Detailed description of the invention
Fig. 1 is a kind of flow chart of image-pickup method in the embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of image collecting device in the embodiment of the present invention.
Specific embodiment
As described above, employing mode one, the to be collected of different heights is adapted to by adjusting the position of image collecting device
Personnel operate relatively complicated.Employing mode two adapts to the people to be collected of different heights using binocular camera image capture device
Member, needs to adjust the spacing of two cameras, adjustment difficulty is larger, slightly inaccurately, may will affect institute's acquired image quality.
In addition, need to handle two-way camera simultaneously during human image collecting, it is higher to the performance requirement of equipment, and higher cost.
To solve the above problems, in embodiments of the present invention, image collecting device is placed vertically, and to collected figure
As being rotated to obtain narrow picture, obtained narrow picture is cut, to obtain the facial image of pre-set dimension.
When being placed vertically due to image collecting device, the altitude range acquired in the vertical direction is larger, at the rotation to image
Reason, so as to meet different height personnel to be collected, Image Acquisition operation is relatively simple.
In addition, being set using image-pickup method provided in an embodiment of the present invention without using the acquisition of two-way camera image
It is standby, cost can be reduced.
It is understandable to enable the above-mentioned purpose, feature and beneficial effect of the embodiment of the present invention to become apparent, below with reference to attached
Figure is described in detail specific embodiments of the present invention.
Referring to Fig.1, a kind of flow chart of image-pickup method in the embodiment of the present invention is given, below with reference to specific steps
It is described in detail.
Step 11, image acquisition device image is controlled.
In specific implementation, it is the personnel to be collected for adapting to different heights, image collecting device can be placed vertically, with
So that the upper-lower height of institute's acquired image is greater than left and right width.Image collecting device can be increased in the vertical direction in this way
Acquisition range.
The height of usual personnel to be collected is in the range of 1m~2m, can be default by the way that image collecting device to be placed in
Highly, and the mode apart from personnel's pre-determined distance to be collected, meets the needs of certain height personnel to be collected.
It is 0.8m distance apart from personnel to be collected for example, image collecting device to be placed in the position of 1.2m high.This master drawing
As acquisition device can be 1m~2m in the acquisition height of vertical direction.
After completing image collector placement location, when needing to acquire image, it can control image collecting device and adopt
Collect image.
In specific implementation, image collecting device can be digital camera, or camera can also be wide dynamic
Video camera, or other devices with image collecting function.
Step 12, described image acquisition device acquired image is obtained.
In specific implementation, after described image acquisition device collects image, available described image acquisition dress
Set acquired image.
Step 13, accessed image is rotated, obtains postrotational narrow picture.
In specific implementation, the personage in commonly required image is positive, i.e., the head and body of personage is in image
Upper and lower positional relationship.Due to personage of the image collecting device in vertical place in acquired image direction and be unsatisfactory for
Portrait places requirement vertically, by being rotated to accessed image, available postrotational narrow picture.Wherein,
The head and body of personage in postrotational narrow picture is upper and lower positional relationship, and two eye levels.
Step 14, the postrotational narrow picture is cut, obtains the facial image of pre-set dimension.
In specific implementation, after obtaining postrotational narrow picture, postrotational narrow picture can be cut,
Obtain the facial image of pre-set dimension.
In an embodiment of the present invention, Face datection can be carried out to postrotational narrow picture, and carries out face characteristic
Point location.After positioning obtains human face characteristic point, can according to the position of human face characteristic point, to the narrow picture into
Row is cut, and obtains the facial image of pre-set dimension.Wherein, the human face characteristic point can be eyes, or mouth may be used also
Think other positions of the faces such as nose.
By cutting to the obtained narrow picture of rotation, the size of facial image can reduce, when needing to face
When image is stored, memory space can be saved.
By above scheme it is found that image collecting device is placed vertically, and acquired image is rotated to obtain narrow
Width image cuts obtained narrow picture, to obtain the facial image of pre-set dimension.Due to image collecting device
When vertical placement, the altitude range acquired in the vertical direction is larger, by the rotation processing to image, so as to meet not
With height personnel to be collected, Image Acquisition operation is relatively simple.
In addition, can be expired using image-pickup method provided in an embodiment of the present invention using an image collecting device
The demand of foot difference height personnel to be collected, cost is relatively low.Opposite binocular camera acquisition equipment can reduce central processing unit
The resource consumption of (Central Processing Unit, CPU).
In specific implementation, before controlling image acquisition device image, image collecting device can also be divided
Resolution and codec format are configured.Wherein, the size of resolution ratio can be matched according to actual application scenarios and demand
It sets, for example, application scenarios higher for image request quality, are configurable to 1920*1080 pixel.
In specific implementation, in image acquisition process, correspondence can also be automatically switched to according to actual application scenarios
Resolution ratio.
In an embodiment of the present invention, the decoding of dicode stream format is configured by the codec format of image collecting device.Wherein
Dicode stream format includes: the code stream of the first format and the code stream of the second format, and the corresponding pressure of code stream of first format
Shrinkage is less than the corresponding compression ratio of code stream of second format.The image definition that the lesser code stream decoding of compression ratio obtains compared with
The fluency of height, the image that the biggish code stream of compression ratio obtains is preferable.The clarity of the code stream acquired image of first format
Higher than the code stream acquired image clarity of the second format.
For example, the code stream of the first format is the code stream of YUY2 format.YUY2 format is uncompressed image format, does not need to solve
Code device, system resource occupancy is lower, and the clarity of the image decoded is higher.
The code stream of second format can be the code stream of MJPG format or the code stream for H.264 format.Wherein, MJPG format
It is equivalent to jpeg image compressed format, frame data are small, and frame per second is high, and the picture fluency decoded is preferable.
It, can also be according to the difference of practical application scene, or according to being adopted it is understood that in practical applications
The quality requirement for collecting image is different, configures the decoding of multi-code stream format for the decoding process of image collecting device.
It in specific implementation, can be to accessed figure after obtaining image collecting device institute acquired image
As carrying out recognition of face, when detecting described image is facial image, control described image acquisition device cuts codec format
It is changed to the code stream of the first format.After codec format to be switched to the code stream of the first format, described image acquisition device is acquired
The image arrived is as accessed image, so as to obtain the higher facial image of clarity.
When detecting described image is inhuman face image, codec format is switched to the by control described image acquisition device
The code stream of two formats.In the application scenarios that image is inhuman face image, to the clarity of image require be not it is very high, will decode
Format switches to the code stream of the second format, and the fluency of acquired image can be improved in this way.
By carrying out Face datection to acquired image, solution can be realized automatically according to the difference of the type of acquired image
The switching of code mode, it is simple and quick.
To better understand and realizing that the embodiment of the present invention, the embodiment of the present invention also provide one convenient for those skilled in the art
Kind image collecting device.
Referring to Fig. 2, described image acquisition device 20 may include: control unit 21, acquiring unit 22, rotary unit 23 with
And cut unit 24, wherein
Described control unit 21, is suitable for control image acquisition device image, and described image acquisition device is placed vertically；
The acquiring unit 22 is suitable for obtaining described image acquisition device acquired image；
The rotary unit 23 obtains postrotational narrow picture suitable for rotating to accessed image；
The cutting unit 24 obtains the face of pre-set dimension suitable for cutting to the postrotational narrow picture
Image.
In specific implementation, described image acquisition device 20 can also include: configuration unit (Fig. 2 is not shown).It is described to match
Unit is set, is suitable for before controlling image acquisition device image, configures the resolution ratio of described image acquisition device, and will solution
Code format is configured to dicode stream format, and the dicode stream format includes: the code stream of the first format and the code stream of the second format, and
The corresponding compression ratio of code stream of first format is less than the compression ratio of the code stream of second format.
In specific implementation, described image acquisition device 20 can also include: the first switch unit (Fig. 2 is not shown).Institute
The first switch unit is stated, is suitable for after obtaining image collecting device institute acquired image, accessed image is carried out
Recognition of face, when detecting described image is facial image, codec format is switched to the by control described image acquisition device
The code stream of one format；The acquiring unit, suitable for codec format to be switched to the code of the first format in first switch unit
After stream, using described image acquisition device institute's acquired image as accessed image.
In specific implementation, described image acquisition device 20 can also include: the second switch unit (Fig. 2 is not shown).Institute
The second switch unit is stated, suitable for when detecting described image is inhuman face image, control described image acquisition device will be decoded
Format is switched to the code stream of the second format.
In specific implementation, the code stream of first format can be the code stream of YUY2 format.
In specific implementation, the code stream of second format can be the code stream or the H.264 code stream of format of MJPG format.
In specific implementation, the cutting unit 24 is suitable for carrying out Face datection to postrotational narrow picture, and carries out
Facial modeling；According to the human face characteristic point that positioning obtains, the narrow picture is cut, pre-set dimension is obtained
Facial image.
In specific implementation, the working principle and workflow of described image acquisition device can be with reference to the above-mentioned realities of the present invention
A kind of description of image-pickup method of example offer is applied, details are not described herein again.
The embodiment of the present invention also provides a kind of image collecting device, including memory and processor, deposits on the memory
The computer instruction that can be run on the processor is contained, the processor executes this hair when running the computer instruction
The step of bright any image-pickup method provided by the above embodiment.
The embodiment of the present invention also provides a kind of computer readable storage medium, and computer readable storage medium is non-volatile
Storage medium or non-transitory storage media, are stored thereon with computer instruction, and the computer instruction executes the present invention when running
The step of any image-pickup method provided by the above embodiment.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (14)
1. a kind of image-pickup method characterized by comprising
Image acquisition device image is controlled, described image acquisition device is placed vertically；
Obtain described image acquisition device acquired image；
Accessed image is rotated, postrotational narrow picture is obtained；
The postrotational narrow picture is cut, the facial image of pre-set dimension is obtained.
2. image-pickup method according to claim 1, which is characterized in that control image acquisition device image it
Before, further includes:
The resolution ratio of described image acquisition device is configured, and configures dicode stream format, the dicode stream format for codec format
It include: the code stream of the first format and the code stream of the second format, and the corresponding compression ratio of code stream of first format is less than institute
State the compression ratio of the code stream of the second format.
3. image-pickup method according to claim 2, which is characterized in that obtaining, image collecting device institute is collected
After image, further includes:
Recognition of face is carried out to accessed image, when detecting described image is facial image, control described image is adopted
Codec format is switched to the code stream of the first format by acquisition means；
After codec format to be switched to the code stream of the first format, using described image acquisition device institute's acquired image as being obtained
The image got.
4. image-pickup method according to claim 3, which is characterized in that further include: when detect described image be it is non-
When facial image, codec format is switched to the code stream of the second format by control described image acquisition device.
5. image-pickup method according to claim 2, which is characterized in that the code stream of first format is YUY2 format
Code stream.
6. image-pickup method according to claim 2, which is characterized in that the code stream of second format is MJPG format
Code stream or the H.264 code stream of format.
7. image-pickup method according to claim 1, which is characterized in that it is described to the postrotational narrow picture into
Row is cut, and obtains the facial image of pre-set dimension, comprising:
Face datection is carried out to postrotational narrow picture, and carries out facial modeling；
According to the human face characteristic point that positioning obtains, the narrow picture is cut, the facial image of pre-set dimension is obtained.
8. a kind of image collecting device characterized by comprising control unit, acquiring unit, rotary unit and cutting are single
Member, wherein
Described control unit, is suitable for control image acquisition device image, and described image acquisition device is placed vertically；
The acquiring unit is suitable for obtaining described image acquisition device acquired image；
The rotary unit obtains postrotational narrow picture suitable for rotating to accessed image；
The cutting unit obtains the facial image of pre-set dimension suitable for cutting to the postrotational narrow picture.
9. image collecting device according to claim 8, which is characterized in that further include: configuration unit is suitable in control figure
Before acquisition device acquisition image, the resolution ratio of described image acquisition device is configured, and configure dual code stream for codec format
Format, the dicode stream format include: the code stream of the first format and the code stream of the second format, and the code stream of first format
Corresponding compression ratio is less than the compression ratio of the code stream of second format.
10. image collecting device according to claim 9, which is characterized in that further include: the first switch unit is suitable for
After obtaining image collecting device institute acquired image, recognition of face is carried out to accessed image, it is described when detecting
When image is facial image, codec format is switched to the code stream of the first format by control described image acquisition device；The acquisition
Unit, suitable for described image being acquired and is filled after codec format being switched to the code stream of the first format by first switch unit
Institute's acquired image is set as accessed image.
11. image collecting device according to claim 10, which is characterized in that further include: the second switch unit, suitable for working as
When detecting that described image is inhuman face image, codec format is switched to the code of the second format by control described image acquisition device
Stream.
12. image collecting device according to claim 8, which is characterized in that the cutting unit is suitable for postrotational
Narrow picture carries out Face datection, and carries out facial modeling；According to the human face characteristic point that positioning obtains, to described narrow
Image is cut, and the facial image of pre-set dimension is obtained.
13. a kind of image collecting device, including memory and processor, being stored on the memory can be in the processor
The computer instruction of upper operation, which is characterized in that perform claim requires 1 to 7 when the processor runs the computer instruction
The step of described in any item image-pickup methods.
14. a kind of computer readable storage medium, is stored thereon with computer instruction, which is characterized in that the computer instruction
Perform claim requires the step of 1 to 7 described in any item image-pickup methods when operation.
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| CN106973228A (en) * | 2017-03-31 | 2017-07-21 | 联想(北京)有限公司 | A kind of image pickup method and electronic equipment |
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