CN105704395B - Photographic method and camera arrangement - Google Patents
Photographic method and camera arrangement Download PDFInfo
- Publication number
- CN105704395B CN105704395B CN201610211643.XA CN201610211643A CN105704395B CN 105704395 B CN105704395 B CN 105704395B CN 201610211643 A CN201610211643 A CN 201610211643A CN 105704395 B CN105704395 B CN 105704395B
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- brightness
- spot
- facial image
- skin
- ratio
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001815 facial effect Effects 0.000 claims abstract description 63
- 238000001514 detection method Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 13
- 230000037311 normal skin Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 208000003351 Melanosis Diseases 0.000 description 3
- 230000003796 beauty Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000289 photo-effect Toxicity 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/168—Feature extraction; Face representation
- G06V40/171—Local features and components; Facial parts ; Occluding parts, e.g. glasses; Geometrical relationships
Abstract
The present invention relates to a kind of photographic method and camera arrangements.The method includes the steps：Obtain the facial image in carrying out finding a view picture under the first brightness when image taking；Obtain each first spot in the facial image；The second spot for being more than default comparison threshold value with the contrast of adjacent skin is obtained from each first spot, wherein adjacent skin is the skin for being less than pre-determined distance threshold value at a distance from the first spot；Detect whether second spot meets brightness regulation condition；If satisfied, by brightness by the first brightness regulation to the second brightness, using the second brightness as the first new brightness, the step of obtaining the facial image in carrying out finding a view picture under the first brightness when image taking is returned to, wherein the second brightness is less than the first brightness；Otherwise, image capture operations are executed under the first brightness.The present invention can optimize the colour of skin contrast of user in the case where retaining user colour feature, to take i.e. natural reality and the preferable photo of effect.
Description
Technical field
The present invention relates to technical field of information processing, more particularly to a kind of photographic method, camera arrangement.
Background technology
At present when taking pictures, generally there is U.S. face to take pictures and both of which of commonly taking pictures.U.S. face, which is taken pictures, to be done specially for skin
The whitening of door and mill skin, the photo effect taken is relatively good, but due to that can erase some features of skin colors of user, takes
Photo is less natural, more false.And although the features of skin colors of user can be retained by commonly taking pictures, and take the natural effect of comparison,
But it can not be clapped especially for the user for having whelk or freckle on the face since special whitening and mill skin will not be carried out
Go out the preferable photo of effect.
Invention content
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of photographic method and camera arrangement, user's skin can retained
The preferable photo of effect is taken in the case of color characteristic.
In order to achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of photographic method, including step：
Obtain the facial image in carrying out finding a view picture under the first brightness when image taking；
Obtain each first spot in the facial image；
The second spot for being more than default comparison threshold value with the contrast of adjacent skin is obtained from each first spot, wherein
Adjacent skin is the skin for being less than pre-determined distance threshold value at a distance from the first spot；
Detect whether second spot meets brightness regulation condition；
If satisfied, brightness is returned by the first brightness regulation to the second brightness using the second brightness as the first new brightness
The step of obtaining the facial image in carrying out finding a view picture under the first brightness when image taking, wherein the second brightness is less than first
Brightness；Otherwise, image capture operations are executed under the first brightness.
A kind of camera arrangement, including：
Facial image acquisition module carries out the face figure found a view in picture when image taking for obtaining under the first brightness
Picture；
First spot acquisition module, for obtaining each first spot in the facial image；
Second spot acquisition module is more than default pair for being obtained from each first spot with the contrast of adjacent skin
Than the second spot of threshold value, wherein adjacent skin is the skin for being less than pre-determined distance threshold value at a distance from the first spot；
Brightness regulation condition detection module, for detecting whether second spot meets brightness regulation condition；
Photo module, for when meeting brightness regulation condition, by brightness by the first brightness regulation to the second brightness, by
Two brightness are as the first new brightness, wherein the second brightness is less than the first brightness；When being unsatisfactory for brightness regulation condition, first
Image capture operations are executed under brightness.
Photographic method and camera arrangement of the present invention identify the spot in facial image under common exposal model, then examine
The contrast of spot and adjacent skin is surveyed, if contrast is more than default comparison threshold value, it is meant that spot is compared with adjacent skin
Obviously, it obtains second spot and judges whether the second spot meets brightness regulation condition, if satisfied, taking reduction exposure brightness
Mode reduce the contrast of spot and skin, make the contrast of spot and surrounding skin within the scope of certain acceptable, allow
Entire blee is relatively uniform, to take the preferable photo of effect.The present invention can be in the feelings for retaining user colour feature
The colour of skin contrast of user is optimized under condition, to take i.e. natural reality and the preferable photo of effect.
Description of the drawings
Fig. 1 is the flow diagram of photographic method embodiment of the present invention；
Fig. 2 is the structural schematic diagram of camera arrangement embodiment one of the present invention；
Fig. 3 is the structural schematic diagram of camera arrangement embodiment two of the present invention；
Fig. 4 is the structural schematic diagram of the first spot acquisition module embodiment of the invention.
Specific implementation mode
It is below in conjunction with the accompanying drawings and preferably real further to illustrate the effect of the technological means and acquirement of the invention taken
Example is applied, to technical scheme of the present invention, carries out clear and complete description.
As shown in Figure 1, a kind of photographic method, including step：
S110, the facial image for carrying out finding a view in picture when image taking under the first brightness is obtained；
Each first spot in S120, the acquisition facial image；
S130, the second spot for being more than default comparison threshold value with the contrast of adjacent skin is obtained from each first spot
Point, wherein adjacent skin are the skin for being less than pre-determined distance threshold value at a distance from the first spot；
Whether S140, detection second spot meet brightness regulation condition, if satisfied, enter step S150, otherwise into
Enter step S160；
S150, by brightness by the first brightness regulation to the second brightness, using the second brightness as the first new brightness, return obtains
The step of taking the facial image in carrying out finding a view picture under the first brightness when image taking, wherein the second brightness is bright less than first
Degree；
S160, image capture operations are executed under the first brightness.
In step s 110, picture of finding a view is to open the picture shown in terminal screen when camera is shot.Face figure
The identification of picture can be realized according to existing mode in the prior art.Brightness is AE (automatic exposure).When just starting shooting,
The brightness or the brightness after user's AE adjustings that first brightness is camera acquiescence.
When smaller in view of screen proportion shared by facial image, even if if spottiness is taken above face photo not
Obviously, so, in one embodiment, obtain the facial image that carries out finding a view in picture when image taking under the first brightness it
Afterwards, can also include step before obtaining each first spot in the facial image：
Whether the ratio for detecting the facial image and the picture of finding a view is more than preset ratio threshold value；
If so, entering the step of obtaining each first spot in the facial image；Otherwise it is bright first to return to acquisition
The step of spending the facial image in carrying out finding a view picture down when image taking.
Region shared by facial image and region shared by picture (i.e. screen area) of finding a view can be according in the prior art
Some modes are realized.Preset ratio threshold value can need sets itself according to user.
In the step s 120, spot includes the feature different from normal skin such as whelk, freckle.According in the prior art
Some modes can identify the skin area in facial image, then detect skin area whether spottiness.If spottiness,
It needs method using the present invention to optimize, if be speckless, means that the skin of user is preferable, without this hair
Bright method can also take the preferable photo of effect.
There are many kinds of the methods for identifying spot, for example, in one embodiment, obtains each the in the facial image
The step of one spot may include：
Detect in the facial image whether the difference of the color value of color value a little and surrounding skin is more than default value,
Middle surrounding skin is the skin for being less than pre-determined distance threshold value at a distance from the point；
Detect in the facial image whether area a little is more than preset area；
If difference is more than default value and area is more than preset area, which is confirmed as the first spot.
Default value, pre-determined distance threshold value and preset area can need to carry out sets itself according to user.Due to
The color value of spot and the color value of surrounding normal skin differ greatly, and general area is bigger, so passing through color value and area
Method can identify the spot in skin.User can also be added as needed on the condition of other identification spots, and the present invention is simultaneously
Restriction is made not to this.
In step s 130, default comparison threshold value can need sets itself according to user.It obtains certain around spot
The skin in region calculates the contrast of the skin and the spot, if contrast is more than default comparison threshold value, it is meant that spot with
Surrounding skin comparison is apparent, is visually easy to discover, if contrast is less than or equal to default comparison threshold value, it is meant that spot and week
Flaw-piece skin compares unobvious, is visually not easy to discover.The calculation of contrast can be according to existing side in the prior art
Formula is realized.Pre-determined distance threshold value in step S130 can phase with pre-determined distance threshold value when judging the first spot in step S120
It together, can not also be identical.
In step S140, in one embodiment, brightness regulation condition can be the number and the first spot of the second spot
The ratio of the number of point is more than default ratio.If the ratio of the number of the second spot and the number of the first spot is more than default ratio
Value, enters step S150, if the ratio of the number of the second spot and the number of the first spot is less than or equal to default ratio, enters
Step S160.
In another embodiment, the brightness regulation condition can be that the number of the second spot is more than predetermined number.Such as
The number of the second spot of fruit is more than predetermined number, it is meant that and larger spot is more with normal skin contrast, enters step S150,
If the number of the second spot is less than or equal to predetermined number, it is meant that larger spot is less with normal skin contrast, has at this time
It may be beauty mole etc., not handle the beauty for also less influencing photo, enter step S160 at this time.
In step S150, different AE has an impact to taking the facial spot effect come.In the case that AE is excessively high, it can put
The contrast of blotch and normal skin.So reduce brightness can allow entire blee relatively uniform, the contrast of skin is covered.
When the second spot meets brightness regulation condition, the first brightness is reduced, then reacquires the face figure after reducing the first brightness
Picture repeats subsequent step until the second spot no longer meets brightness regulation condition.It is unsatisfactory for brightness regulation in the second spot
When condition, execution photographing operation can shoot the preferable photo of effect directly under present intensity.
Brightness can be realized by the first brightness regulation to the second brightness according to various ways.For example, can be bright by first
Degree reduces a fixed constant every time, then reacquires the facial image after reduce brightness；It can also be every by the first brightness
Then the secondary fixed percentage being multiplied by less than 1 reacquires the facial image after reduce brightness；The width that first brightness reduces every time
Degree can also be different value, such as just started reduce by a relatively large margin, behind be finely adjusted again, the present invention not to brightness reduction
Method make restriction.
Based on same inventive concept, the present invention also provides a kind of camera arrangements, take pictures dress to the present invention below in conjunction with the accompanying drawings
The specific implementation mode set is described in detail.
As shown in Fig. 2, a kind of camera arrangement, including：
Facial image acquisition module 110 carries out the people to find a view in picture when image taking for obtaining under the first brightness
Face image；
First spot acquisition module 120, for obtaining each first spot in the facial image；
Second spot acquisition module 130 is more than in advance for being obtained from each first spot with the contrast of adjacent skin
If the second spot of comparison threshold value, wherein adjacent skin are the skin for being less than pre-determined distance threshold value at a distance from the first spot；
Brightness regulation condition detection module 140, for detecting whether second spot meets brightness regulation condition；
Photo module 150, for when meeting brightness regulation condition, by brightness by the first brightness regulation to the second brightness,
Using the second brightness as the first new brightness, wherein the second brightness is less than the first brightness；When being unsatisfactory for brightness regulation condition,
Image capture operations are executed under first brightness.
When smaller in view of screen proportion shared by facial image, even if if spottiness is taken above face photo not
Obviously, so, in one embodiment, as shown in figure 3, camera arrangement of the present invention can also include be connected to the facial image
Ratio detection module 160 between acquisition module 110 and the first spot acquisition module 120, the ratio detection module 160
Whether the ratio for detecting the facial image and the picture of finding a view is more than preset ratio threshold value.First spot obtains
Module 120 obtains each first spot in the facial image when ratio is more than preset ratio threshold value.The facial image
Acquisition module 110 reacquires when ratio is less than or equal to preset ratio threshold value and carries out taking when image taking under the first brightness
Facial image in scape picture.
Spot includes the feature different from normal skin such as whelk, freckle.It can be with according to existing mode in the prior art
Identify facial image in skin area, then detect skin area whether spottiness.There are many kinds of the methods for detecting spot, example
Such as, in one embodiment, as shown in figure 4, the first spot acquisition module 120 may include：
Color value detection unit 1201, for detect in the facial image whether the color value of color value and surrounding skin a little
Difference be more than default value, wherein surrounding skin be at a distance from the point be less than pre-determined distance threshold value skin；
Area detecting unit 1202, for detecting, whether area a little is more than preset area in the facial image；
First spot acquiring unit 1203 is used for when difference is more than default value and area is more than preset area, by this
Point is confirmed as the first spot.
It should be noted that user can also be added as needed on the condition of other identification spots, the present invention is not to this
Make restriction.
In one embodiment, brightness regulation condition can be the ratio of the number and the number of the first spot of the second spot
More than default ratio.In another embodiment, the brightness regulation condition can be that the number of the second spot is more than default
Number.When the second spot meets brightness regulation condition, photo module 150 reduces the first brightness, and facial image acquisition module 110 exists
Facial image is reacquired after reducing the first brightness.When the second spot is unsatisfactory for brightness regulation condition, photo module 150 is direct
Photographing operation is executed under present intensity can shoot the preferable photo of effect.
Photo module 150 can be realized brightness by the first brightness regulation to the second brightness according to various ways.For example, can
The first brightness is reduced a fixed constant every time, the facial image after reduce brightness is then reacquired；It can also incite somebody to action
The fixed percentage less than 1 is multiplied by first brightness every time, then reacquires the facial image after reduce brightness；First brightness is every
The amplitude of secondary reduction can also be different value, for example, just started reduce by a relatively large margin, behind be finely adjusted again, the present invention is not
The method reduced to brightness makes restriction.
The present invention identifies the spot in facial image under common exposal model, then detects pair of spot and adjacent skin
Than degree, if contrast is more than default comparison threshold value, it is meant that spot and adjacent skin comparison are apparent, obtain second spot simultaneously
Judge whether the second spot meets brightness regulation condition, if satisfied, the mode for reducing exposure brightness is taken to reduce spot and skin
Contrast, make the contrast of spot and surrounding skin within the scope of certain acceptable, make entire blee relatively uniform,
To take the preferable photo of effect.The present invention can in the case where retaining user colour feature to the colour of skin contrast of user into
Row optimization, to take i.e. natural reality and the preferable photo of effect.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of photographic method, which is characterized in that including step：
Obtain the facial image in carrying out finding a view picture under the first brightness when image taking；
Obtain each first spot in the facial image；
The second spot for being more than default comparison threshold value with the contrast of adjacent skin is obtained from each first spot, wherein adjacent
Skin is the skin for being less than pre-determined distance threshold value at a distance from the first spot；
Detect whether second spot meets brightness regulation condition；The brightness regulation condition is the number and the of the second spot
The ratio of the number of one spot is more than default ratio or the number of second spot is more than predetermined number；
If satisfied, brightness is returned and obtained using the second brightness as the first new brightness by the first brightness regulation to the second brightness
Carry out finding a view when image taking under the first brightness facial image in picture the step of, wherein to be less than first bright for the second brightness
Degree；Otherwise, image capture operations are executed under the first brightness.
2. photographic method according to claim 1, which is characterized in that obtain and carry out taking when image taking under the first brightness
Further include step before obtaining each first spot in the facial image after facial image in scape picture：
Whether the ratio for detecting the facial image and the picture of finding a view is more than preset ratio threshold value；
If so, entering the step of obtaining each first spot in the facial image；Otherwise it returns and obtains under the first brightness
Find a view when image taking facial image in picture the step of.
3. photographic method according to claim 1, which is characterized in that obtain each first spot in the facial image
The step of include：
Detect in the facial image whether the difference of the color value of color value a little and surrounding skin is more than default value, wherein week
It is the skin for being less than pre-determined distance threshold value at a distance from the point to enclose skin；
Detect in the facial image whether area a little is more than preset area；
If difference is more than default value and area is more than preset area, which is confirmed as the first spot.
4. a kind of camera arrangement, which is characterized in that including：
Facial image acquisition module carries out the facial image found a view in picture when image taking for obtaining under the first brightness；
First spot acquisition module, for obtaining each first spot in the facial image；
Second spot acquisition module is more than default contrast threshold for being obtained from each first spot with the contrast of adjacent skin
Second spot of value, wherein adjacent skin are the skin for being less than pre-determined distance threshold value at a distance from the first spot；
Brightness regulation condition detection module, for detecting whether second spot meets brightness regulation condition；The brightness tune
Section condition is more than of default ratio or second spot for the ratio of the number of the second spot and the number of the first spot
Number is more than predetermined number；
Photo module, it is bright by second by brightness by the first brightness regulation to the second brightness for when meeting brightness regulation condition
It spends as the first new brightness, wherein the second brightness is less than the first brightness；When being unsatisfactory for brightness regulation condition, in the first brightness
Lower execution image capture operations.
5. camera arrangement according to claim 4, which is characterized in that further include being connected to the facial image acquisition module
With the ratio detection module between the first spot acquisition module, the ratio detection module is for detecting the facial image
Whether it is more than preset ratio threshold value with the ratio of the picture of finding a view；
The first spot acquisition module obtains each first in the facial image when ratio is more than preset ratio threshold value
Spot；The facial image acquisition module ratio be less than or equal to preset ratio threshold value when, reacquire under the first brightness into
The facial image found a view when row image taking in picture.
6. camera arrangement according to claim 4, which is characterized in that the first spot acquisition module includes：
Color value detection unit, for detect in the facial image whether the color value of color value a little and surrounding skin difference it is big
In default value, wherein surrounding skin is the skin for being less than pre-determined distance threshold value at a distance from the point；
Area detecting unit, for detecting, whether area a little is more than preset area in the facial image；
First spot acquiring unit, for when difference is more than default value and area is more than preset area, which to be confirmed as
First spot.
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| CN201610211643.XA CN105704395B (en) | 2016-04-05 | 2016-04-05 | Photographic method and camera arrangement |
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| CN201610211643.XA CN105704395B (en) | 2016-04-05 | 2016-04-05 | Photographic method and camera arrangement |
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| CN105704395B true CN105704395B (en) | 2018-09-14 |
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| CN106469301B (en) * | 2016-08-31 | 2019-05-07 | 北京天诚盛业科技有限公司 | Adaptive adjustable face identification method and device |
| EP3662406B1 (en) | 2017-08-01 | 2023-11-22 | Apple Inc. | Determining sparse versus dense pattern illumination |
| CN108038836B (en) * | 2017-11-29 | 2020-04-17 | 维沃移动通信有限公司 | Image processing method and device and mobile terminal |
| CN110740252A (en) | 2018-07-20 | 2020-01-31 | 华为技术有限公司 | image acquisition method, device and terminal |
| CN109359611B (en) * | 2018-10-26 | 2020-10-13 | 厦门美图之家科技有限公司 | Method for detecting face nevus and mobile terminal |
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| JP2004271845A (en) * | 2003-03-07 | 2004-09-30 | Olympus Corp | Camera and program for camera |
| US8244059B2 (en) * | 2007-07-13 | 2012-08-14 | Fujifilm Corporation | Image processing method, apparatus, recording medium, and image pickup apparatus |
| CN103841323A (en) * | 2014-02-20 | 2014-06-04 | 小米科技有限责任公司 | Shooting parameter allocation method and device and terminal device |
| CN104159037A (en) * | 2014-08-26 | 2014-11-19 | 厦门美图之家科技有限公司 | Self-timer method for automatically photographing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040207743A1 (en) * | 2003-04-15 | 2004-10-21 | Nikon Corporation | Digital camera system |
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| JP2004271845A (en) * | 2003-03-07 | 2004-09-30 | Olympus Corp | Camera and program for camera |
| US8244059B2 (en) * | 2007-07-13 | 2012-08-14 | Fujifilm Corporation | Image processing method, apparatus, recording medium, and image pickup apparatus |
| CN103841323A (en) * | 2014-02-20 | 2014-06-04 | 小米科技有限责任公司 | Shooting parameter allocation method and device and terminal device |
| CN104159037A (en) * | 2014-08-26 | 2014-11-19 | 厦门美图之家科技有限公司 | Self-timer method for automatically photographing |
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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 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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Granted publication date: 20180914 |