KR20140118115A - System and method for calibrating around view of vehicle - Google Patents
System and method for calibrating around view of vehicle Download PDFInfo
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- KR20140118115A KR20140118115A KR1020130033464A KR20130033464A KR20140118115A KR 20140118115 A KR20140118115 A KR 20140118115A KR 1020130033464 A KR1020130033464 A KR 1020130033464A KR 20130033464 A KR20130033464 A KR 20130033464A KR 20140118115 A KR20140118115 A KR 20140118115A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012937 correction Methods 0.000 claims abstract description 117
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 claims description 21
- 239000000284 extract Substances 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 claims description 5
- 238000003702 image correction Methods 0.000 abstract description 25
- 238000012545 processing Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 25
- 238000010586 diagram Methods 0.000 description 10
- 238000000605 extraction Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000012935 Averaging Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
- G06T3/4038—Image mosaicing, e.g. composing plane images from plane sub-images
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/10—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used
- B60R2300/101—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used using cameras with adjustable capturing direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/10—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used
- B60R2300/105—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used using multiple cameras
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/40—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the details of the power supply or the coupling to vehicle components
- B60R2300/402—Image calibration
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Image Processing (AREA)
Abstract
The present invention relates to a vehicle periphery image correction system and a vehicle periphery image correction method. According to one embodiment of the present invention, there is provided an image processing apparatus comprising: an image acquiring unit acquiring images around a vehicle with a plurality of cameras; An object detecting unit for detecting an object in the overlapping region of the acquired images; A color correcting unit for performing color correction in the remaining area excluding the object in the overlapping area; And an image synthesizer for performing image synthesis by connecting images forming the overlap region with the color corrected region. Also, a method for correcting the surrounding image of the vehicle is proposed.
Description
The present invention relates to a vehicle periphery image correction system and a vehicle periphery image correction method. More particularly, the present invention relates to a vehicle periphery image correction system and a vehicle periphery image correction method for correcting a difference in color distribution due to the presence of an object in overlapping images of captured images around the vehicle.
The surround view or the surround view image is displayed so that the driver can not see the surroundings of the vehicle which can not be seen, so that a plurality of cameras are installed in the vehicle so that the images around the automobile are displayed on one screen. For example, a top-view image looking at the vehicle from above is generated from the captured images of the cameras mounted on the front, rear, left, and right sides of the vehicle to indicate the front, rear, and side conditions of the vehicle.
At this time, since a surround-view image is formed by combining images captured by a plurality of cameras installed in a vehicle, colors of the same object may be displayed differently depending on the environment in which the images are captured in each camera.
Conventionally, an overlapping region of images obtained by each camera for photographing the surroundings of a vehicle is adjusted by simply adjusting the average color distribution over the entire overlapping region without considering the influence of the presence of an object. For example, when photographing using a wide-angle lens in front, rear, left and right cameras mounted on a vehicle, it is possible to have a view angle of about 180 degrees or more. At this time, overlapping areas OA1 to OA4 May be formed. At this time, conventionally, the color distribution of the entire image is similarly adjusted by simply averaging and adjusting the color distribution of all the overlapping regions so that the color distributions of the entire overlapping regions are similar.
5, the color distribution OA_B1 due to the presence of the object B shown by the
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a vehicle periphery image correction technique in which color correction is performed in an overlapping area in consideration of the influence of objects existing in overlapping areas of images captured by a plurality of cameras.
According to one aspect of the present invention, there is provided an image processing apparatus comprising: an image obtaining unit for obtaining images around a vehicle by a plurality of cameras; An object detecting unit for detecting an object in the overlapping region of the acquired images; A color correcting unit for performing color correction in the remaining area excluding the object in the overlapping area; And an image synthesizer for performing image synthesis by connecting images forming the overlap region with the color corrected region.
In this case, in one example, the color correction unit may include: a color information extraction unit that extracts color information of the overlapping area; A parameter calculation unit for calculating a color correction parameter using the extracted color information; A maintenance ratio calculation unit for calculating a maintenance ratio using the calculated color correction parameter; And a color correction executing unit for performing color correction on the remaining area by applying the calculated correction ratio.
At this time, the color information extracting unit extracts the average object color information of the object region and the average remaining color information of the remaining region in each of the first and second images forming the overlap region, The sum of the product of the first weight and the average object color information, the product of the second weight and the average residual color information, the sum of the first weight and the second weight is a predetermined weight value, and each of the first and second weights May be an experimentally obtained set value among the interval values from '0' to the weight value.
Also, at this time, in one example, the first weight may be '0'.
According to one example, when the reference of the color correction is the first image, the maintenance ratio is the ratio of the color correction parameter of the second image to the color correction parameter of the first image, Color correction can be performed by multiplying the color information of the color correction amount by the correction amount.
Further, in one example, the plurality of cameras may be four cameras that photograph the vehicle in the longitudinal, lateral, and lateral directions.
In this case, the vehicle periphery image correction system according to one example may further include a display unit for displaying the synthesized image.
Next, in order to solve the above-mentioned problem, according to another aspect of the present invention, there is provided a method comprising: obtaining images around a vehicle with a plurality of cameras; Detecting an object in an overlapping region of acquired images; Performing color correction in an area other than an object in the overlapping area; And performing image synthesis by connecting images forming the overlap region with the color-corrected region.
At this time, in one example, the step of performing color correction includes: extracting color information of a redundant area; Calculating color correction parameters using the extracted color information; Calculating a maintenance ratio using the calculated color correction parameter; And performing color correction on the remaining area by applying the calculated maintenance ratio.
In this case, in the step of extracting the color information, the average object color information of the object region and the average remaining color information of the remaining region are extracted from each of the first and second images forming the overlap region, The sum of the product of the first weight and the average object color information and the product of the second weight and the average residual color information in each of the first image and the second image, and the sum of the first weight and the second weight is a preset weight value, And each of the second weights may be an experimentally obtained set value among the interval values from '0' to the weight value.
Also, at this time, in one example, the first weight may be '0'.
According to one example, in the case where the reference of the color correction is the first image, the maintenance ratio is the ratio of the color correction parameter of the second image to the color correction parameter of the first image, The color correction can be performed by multiplying the color information of each of the remaining areas by the maintenance ratio.
In another example, a plurality of cameras may be four cameras that photograph the vehicle in the front, rear, left, and right directions.
Here, in another example, the vehicle periphery image correction method may further include displaying the synthesized image.
According to an embodiment of the present invention, color correction can be performed in an overlapping area in consideration of the influence of objects existing in overlapping areas of images captured by a plurality of cameras.
In addition, according to one example, it is possible to easily perceive the periphery of the user by performing color correction so as to exhibit a similar color distribution by reflecting the influence of the color distribution by the object existing in the overlapping region
It is apparent that various effects not directly referred to in accordance with various embodiments of the present invention can be derived by those of ordinary skill in the art from the various configurations according to the embodiments of the present invention.
FIG. 1 is a block diagram schematically illustrating a vehicle periphery image correction system according to an embodiment of the present invention.
2 is a block diagram schematically illustrating a vehicle periphery image correction system according to another embodiment of the present invention.
3 is a block diagram schematically showing a part of the configuration of a vehicle surroundings image correction system according to an embodiment of the present invention.
4 is a block diagram schematically showing a part of the configuration of a vehicle surroundings image correction system according to another embodiment of the present invention.
5 is a diagram schematically showing an application state of a vehicle surroundings image correction system according to another embodiment of the present invention.
6 is a flowchart schematically illustrating a method for correcting a surrounding image according to another embodiment of the present invention.
FIG. 7 is a flowchart schematically illustrating a method of correcting a surrounding image of a vehicle according to another embodiment of the present invention.
FIG. 8 is a flowchart schematically showing a part of a method for correcting a surrounding image according to an embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a first embodiment of the present invention; Fig. In the description, the same reference numerals denote the same components, and a detailed description may be omitted for the sake of understanding of the present invention to those skilled in the art.
As used herein, unless an element is referred to as being 'direct' in connection, combination, or placement with other elements, it is to be understood that not only are there forms of being 'directly connected, They may also be present in the form of being connected, bonded or disposed.
It should be noted that, even though a singular expression is described in this specification, it can be used as a concept representing the entire constitution unless it is contrary to, or obviously different from, or inconsistent with the concept of the invention. It is to be understood that the phrases "including", "having", "having", "comprising", etc. in this specification are intended to be additionally or interchangeable with one or more other elements or combinations thereof.
A vehicle periphery image correction system according to one aspect of the present invention will be described in detail with reference to the drawings. Here, reference numerals not shown in the drawings to be referred to may be reference numerals in other drawings showing the same configuration.
FIG. 1 is a block diagram schematically showing a vehicle periphery image correction system according to an embodiment of the present invention, FIG. 2 is a block diagram schematically showing a vehicle periphery image correction system according to another embodiment of the present invention FIG. 3 is a block diagram schematically showing a part of the configuration of a vehicle periphery image correction system according to an embodiment of the present invention, and FIG. 4 is a block diagram schematically illustrating a configuration of a part of a vehicle periphery image correction system according to another embodiment of the present invention And FIG. 5 is a view schematically showing an application state of the vehicle surroundings image correction system according to another embodiment of the present invention.
An
Referring to FIG. 1 and FIG. 2, the
For example, referring to FIG. 5, the plurality of
1 and 2, the
Next, with reference to Figs. 1, 2, 3, and / or 4, the
3 and 4, in one example, the
Specifically, referring to FIG. 3 and / or 4, the color
4, when the images of the overlapping regions of the images obtained from the two cameras, that is, the images of the
3 and 4, the
4, the
3 and 4, the maintenance
4, the maintenance ratio or the correction ratio is a parameter for correcting the color information, which can be calculated as a ratio between Ival 1 and Ival 2 , and can be used for color correction of the final output image. For example, referring to FIG. 4, when the image of the
3 and 4, the color
For example, referring to FIG. 4, when an image of the
1 and 2, the
In addition, referring to FIG. 2, the vehicle surroundings image correction system according to another example may further include a
Next, a vehicle periphery image correction method according to another aspect of the present invention will be described in detail with reference to the following drawings. At this time, the vehicle periphery image correction systems according to the above embodiment and FIGS. 1 to 5 will be referred to, and redundant explanations therefor may be omitted.
FIG. 6 is a flowchart schematically illustrating a method of correcting a surrounding image of a vehicle according to another embodiment of the present invention, FIG. 7 is a flowchart schematically illustrating a method of correcting a surrounding image of a vehicle according to another embodiment of the present invention, FIG. 8 is a flowchart schematically showing a part of a method for correcting a surrounding image according to an embodiment of the present invention.
6 and 7, a method for correcting a surrounding image according to an embodiment of the present invention includes an image obtaining step S100, an object detecting step S300, a color correcting step S500, and an image synthesizing step S700 . In addition, referring to FIG. 7, a method for correcting a surrounding image according to another example may further include a display step S900. Let's look at each step in detail.
Referring to FIG. 6 and FIG. 7, in the image acquisition step S100, images around the vehicle are acquired by the plurality of
For example, referring to FIG. 5, the plurality of
Next, referring to FIG. 6 or FIG. 7, the object detecting step S300 can detect the object B in the overlapping areas OA1 to OA4 of the images obtained in the image obtaining step S100. For example, in the object detection step S300, the overlap areas OA1 to OA4 of the images acquired in the image acquisition step S100 may be detected and the object B in the overlap areas OA1 to OA4 may be detected. A method of detecting an object only in a redundant area can perform a high-speed operation. Alternatively, in the object detecting step S300, the object B is detected from the images obtained in the image acquiring step S100 and whether or not the detected object B is within the overlapping areas OA1 to OA4 It is possible to detect the object B in the overlapping areas OA1 to OA4. Also, in the process of detecting an object in the object detection step S300, overlapping regions of images acquired by two neighboring cameras can be detected.
6, 7, and / or 8, in the color correction step (S500), the color correction may be performed in the remaining area excluding the object in the overlap area.
For example, referring to FIG. 8, in one example, the color correction step S500 for performing color correction includes a color information extraction step S510, a color correction parameter calculation step S530, a color correction calculation calculation step S550, And performing a color correction step S570.
Specifically, in the color information extracting step (S510) in FIG. 8, the color information of the overlapping area can be extracted. For example, referring to the color
Referring to FIG. 8, in the color correction parameter calculation step S530 of the color correction step S500, the color correction parameter may be calculated using the color information extracted in the color information extraction step S510. For example, referring to FIG. 4, in the color correction parameter calculation step S530, the color correction parameter is calculated by multiplying each of the first and second images by the product of the first weight and the average object color information, Can be calculated as the sum of the products of the information. In this case, the sum of the first weight and the second weight may be a predetermined weight value, and each of the first and second weights may be an experimentally obtained set value of the interval value from '0' to the weight value. For example, in one example, the first weight may be '0'.
Next, referring to FIG. 8, the color correction maintenance calculation step S550 of the color correction steps S500 can calculate the maintenance cost using the color correction parameter calculated in the color correction parameter calculation step S530. For example, referring to the storage
Next, referring to FIG. 8, in the color correction step S570 of the color correction step S500, the color correction can be performed on the remaining area by applying the correction ratio calculated in the color correction calculation calculation step S550 have. For example, referring to the color
6 and 7, in the image synthesis step S700, image combining may be performed by connecting the images forming the color-corrected area and the overlapped area in the color correction step S500.
In addition, referring to FIG. 7, the method for correcting the surrounding image according to one example may further include displaying the synthesized image.
The foregoing embodiments and accompanying drawings are not intended to limit the scope of the present invention but to illustrate the present invention in order to facilitate understanding of the present invention by those skilled in the art. Embodiments in accordance with various combinations of the above-described configurations can also be implemented by those skilled in the art from the foregoing detailed description. Accordingly, various embodiments of the present invention may be embodied in various forms without departing from the essential characteristics thereof, and the scope of the present invention should be construed in accordance with the invention as set forth in the appended claims. Alternatives, and equivalents by those skilled in the art.
10:
30: Object detection unit 50: Color correction unit
51: color information extracting unit 53: parameter calculating unit
55: Maintenance calculation unit 57: Color correction performing unit
70: image synthesizer 90: display
Claims (14)
An object detecting unit for detecting an object in the overlapping region of the acquired images;
A color correcting unit for performing color correction in the remaining areas except for the object among the overlapping areas; And
And an image synthesis unit for synthesizing the color-corrected region and the images forming the overlap region to perform image synthesis.
Wherein the color correction unit comprises:
A color information extracting unit for extracting color information of the overlapping area;
A parameter calculation unit for calculating a color correction parameter using the extracted color information;
A storage ratio calculating unit for calculating a storage ratio using the calculated color correction parameter; And
And a color correction executing unit for performing color correction on the remaining area by applying the calculated correction ratio.
Wherein the color information extracting unit extracts average object color information of the object region and average residual color information of the remaining region in each of the first and second images forming the overlap region,
Wherein the color correction parameter is calculated as a sum of a product of a first weight and an average object color information in each of the first and second images, a product of a second weight and a mean residual color information,
Wherein the sum of the first weight and the second weight is a preset weight value, and each of the first and second weight values is an experimentally obtained set value among interval values from '0' to the weight value. system.
Wherein the first weight is '0'.
Wherein the correction ratio is a ratio of a color correction parameter of the second image to a color correction parameter of the first image when the reference of the color correction is the first image,
Wherein the color correction performing unit multiplies the color information of each of the remaining regions by the correction ratio to perform the color correction.
Wherein the plurality of cameras are four cameras for photographing the front, rear, left, and right directions of the vehicle.
And a display unit for displaying the synthesized image.
Detecting an object in the overlapping region of the acquired images;
Performing color correction in an area other than the object among the overlapping areas; And
And performing image synthesis by connecting the color-corrected area and the images forming the overlapping area.
The step of performing the color correction includes:
Extracting color information of the overlapping region;
Calculating a color correction parameter using the extracted color information;
Calculating a maintenance ratio using the calculated color correction parameter; And
And performing color correction on the remaining area by applying the calculated maintenance ratio.
Extracting the average object color information of the object region and the average remaining color information of the remaining region in each of the first and second images forming the overlap region,
Wherein the color correction parameter is calculated as a sum of a product of a first weight and an average object color information in each of the first and second images, a product of a second weight and a mean residual color information,
Wherein the sum of the first weight and the second weight is a preset weight value, and each of the first and second weight values is an experimentally obtained set value among interval values from '0' to the weight value. Way.
Wherein the first weight is " 0 ".
Wherein the correction ratio is a ratio of a color correction parameter of the second image to a color correction parameter of the first image when the reference of the color correction is the first image,
Wherein the color correction is performed by multiplying each of the color information of the remaining area by the correction ratio in performing the color correction.
Wherein the plurality of cameras are four cameras for photographing the front, rear, left, and right directions of the vehicle.
Further comprising the step of displaying the synthesized image.
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KR1020130033464A KR20140118115A (en) | 2013-03-28 | 2013-03-28 | System and method for calibrating around view of vehicle |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170099252A (en) * | 2016-02-23 | 2017-08-31 | 두산인프라코어 주식회사 | Display system |
KR20180001869A (en) * | 2016-06-28 | 2018-01-05 | 엘지이노텍 주식회사 | Image Improving Apparatus for AVM System and Improving Method thereof |
KR20190075034A (en) * | 2019-06-20 | 2019-06-28 | 주식회사 아이닉스 | Imaging Apparatus and method for Automobile |
-
2013
- 2013-03-28 KR KR1020130033464A patent/KR20140118115A/en not_active Application Discontinuation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170099252A (en) * | 2016-02-23 | 2017-08-31 | 두산인프라코어 주식회사 | Display system |
WO2017146403A1 (en) * | 2016-02-23 | 2017-08-31 | 두산인프라코어 주식회사 | Display system |
KR20180001869A (en) * | 2016-06-28 | 2018-01-05 | 엘지이노텍 주식회사 | Image Improving Apparatus for AVM System and Improving Method thereof |
KR20190075034A (en) * | 2019-06-20 | 2019-06-28 | 주식회사 아이닉스 | Imaging Apparatus and method for Automobile |
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