CN208956216U - Based on the long large car viewing system away from transmission of low-light (level) camera synchronous acquisition - Google Patents
Based on the long large car viewing system away from transmission of low-light (level) camera synchronous acquisition Download PDFInfo
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Abstract
The utility model relates to large cars to look around DAS (Driver Assistant System) field, more particularly to a kind of based on the long large car viewing system away from transmission of low-light (level) camera synchronous acquisition, including four tunnel low-light (level) cameras, the output end of four tunnel low-light (level) cameras has been electrically connected AHD serializer, the input terminal of AHD serializer is electrically connected by AHD coaxial line with the input terminal of deserializer, the output end of deserializer is electrically connected with master chip, blending image system built in master chip will look around image and export outward, the system realizes the high-resolution acquisition of image by low-light (level) camera under the low light environments such as night or tunnel, and pass through serializer, LVDS coaxial line and deserializer, it realizes over long distances, height is synchronous, it is high anti-interference, the data of low delay are transmitted, height fusion multiway images are seamless spliced at one rotatable 360 Image is spent, it is at low cost, practical.
Description
Technical field
The utility model relates to large cars to look around DAS (Driver Assistant System) field, and in particular to one kind is based on low-light (level) camera
Synchronous acquisition grows the large car viewing system away from transmission.
Background technique
Current vehicle body looks around DAS (Driver Assistant System) and mainly uses universal camera shooting head, generic video data transport vehicle
HDMI, LVDS coaxial line etc. passes to host tiled display.Either spliced using CVBS transmission SD video data to host
Display.
This vehicle body is looked around DAS (Driver Assistant System) and is had the following disadvantages: the side such as first, HDMI, winding displacement LVDS, CVBS
Formula carries out data transmission, and is parallel or short-range processing mode, does not have long distance transmission ability, without high anti-interference energy
Power.And LVDS coaxial line transmits, Gao Chengben, in the long distance transmission in cart more than 10 meters, signal decaying, and transmission shakiness
It is fixed.CVBS transmission transmits poor image quality, is unable to satisfy high definition anastomosing and splicing display effect although inexpensive.Second,
The prior art can be used in compact car, can not apply on the large car for having super large blind area, can not solve the blind area peace of large car
Full problem.Third, universal camera shooting head commonly used in the prior art carry out data acquisition, and so-called fine definition is in night or tunnel
The imaging effect of the environment such as road is bad.4th, in the prior art directly showing after the splicing of multi-path camera data, image cannot
Height merges, or splicing has sharp trace.
Summary of the invention
In view of the deficiencies in the prior art and problem, the utility model provide a kind of synchronous based on low-light (level) camera
Acquire the long large car viewing system away from transmission.
Solution adopted by the utility model to solve its technical problems is that: a kind of long based on low-light (level) camera synchronous acquisition
Large car viewing system away from transmission, the camera including being installed on large car vehicle body, the camera are that four tunnel low-light (level)s are taken the photograph
As head, the output end of the four tunnels low-light (level) camera respectively be electrically connected with AHD serializer, the AHD serializer is included
Low-light (level) camera acquired image signal is converted to serial signal by image signal processing unit, the AHD serializer
Input terminal is electrically connected by AHD coaxial line with the input terminal of deserializer, and the output end of the deserializer is electrically connected with master chip, main
The blending image system of built-in chip type will look around image and export outward；The blending image system include parameter initialization unit and
Image co-registration concatenation unit, the parameter initialization unit initialize deserializer address, deserializer to AHD serializer from
The image signal processing unit of band is initialized, and is carried out initialization by image signal processing unit control low-light (level) camera and is set
It sets, low-light (level) camera sends to image signal processing unit and sets the image data of specification, then through deserializer by low image
Data are sent to image co-registration concatenation unit, and described image anastomosing and splicing unit permeates four tunnel low-light (level) camera images
The output end of road image, image co-registration concatenation unit is connect with display screen.
Further, the low-light (level) camera is 2,000,000 pixel camera heads, acquires vehicle body surrounding with the frame per second of 60fps
Image.
Further, the pixel of four tunnel low-light (level) camera images is fallen in and is finally melted by described image anastomosing and splicing unit
The position of result 1920*1080p image is closed, sampling mapping makes the synthesis of four road images, and image is exported to display screen all the way.
Further, the described image signal processing unit control output resolution ratio of low-light (level) camera, sample frequency and
Image size.
The utility model has the beneficial effects that the utility model is long away from the big of transmission based on low-light (level) camera synchronous acquisition
Type vehicle viewing system, can real-time 15 meters or more long range image transmittings, high reduction degree, it is no lose angle anastomosing and splicing.Low
Illumination collects the image of high-resolution, and low-light (level) camera can make system realize the Image Acquisition of real low-light (level) high-resolution.
Using serializer+LVDS coaxial line+deserializer transmission apparatus, system can be made to realize real synchronization, low delay, long range, height
Jamproof data transmission.By image co-registration concatenation unit, system can highly merge four tunnels, one megapixel image and seamless
360 degree of immersion rotatable images are spliced into, while four tunnel picture altitudes are merged and are seamless spliced, real-time immersion rotation
Show, allow user it is on the spot in person look around surrounding, and user can real-time control 360 degree rotation.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1: it is a kind of based on the long large car viewing system away from transmission of low-light (level) camera synchronous acquisition, such as Fig. 1 institute
Show, camera is installed in the vehicle body surrounding of large car, camera is selected as four tunnel low-light (level) cameras, and low-light (level) camera is
2000000 pixel camera heads, with the image of the frame per second acquisition large car vehicle body surrounding of 60fps.The output of four tunnel low-light (level) cameras
End has been electrically connected AHD serializer, and the included image signal processing unit of AHD serializer is collected by low-light (level) camera
Picture signal is converted to serial signal, and the input terminal of AHD serializer is electrically connected by AHD coaxial line with the input terminal of deserializer,
AHD coaxial line is used for serial signal, and the output end of deserializer is electrically connected with master chip, and serial signal is parsed into main core by deserializer
The manageable image data format of piece, is transferred on master chip by MIPI agreement, the blending image system built in master chip
Four tunnel image datas are subjected to anastomosing and splicing, export an inner loop outward around the full field-of-view image of full-sized bus surrounding.
Wherein, blending image system includes parameter initialization unit and image co-registration concatenation unit, parameter initialization unit
Deserializer is controlled, deserializer address is initialized, deserializer carries out the image signal processing unit that AHD serializer carries
Initialization carries out I2C configuration and control to ISP image signal processing unit, then controls low photograph by ISP image signal processing unit
Degree camera is configured and is controlled.Four tunnel low-light (level) camera synchronous acquisitions, four tunnel low-light (level) cameras, which are worked as, receives main core
Just start to acquire data when the control signal of piece, four tunnel low-light (level) cameras set specification to signal processing unit transmission
Image data, then image data is sent to image co-registration concatenation unit through deserializer, image co-registration concatenation unit is low by four tunnels
Illumination camera image is parsed, and the image that the brightness of image, coloration parsed is unified, anastomosing and splicing is at nature
Seamless effective image data all the way, the output end of image co-registration concatenation unit are connect with display screen, are highly merged seamless spliced
Image be illustrated as 360 degree of immersions rotatable control image and synchronism output to HDMI display.
In order to express easily, it is assumed here that the width of blending image is 400 pixels, is highly 600 pixels, corresponds to practical generation
Area size in boundary be it is 4 meters wide, it is 6 meters long, then we can establish the mapping of pixel coordinate to world coordinates
xw=(4/400)·xp (1)
yw=(6/600)·yp (2)
Wherein, xp, ypFor the pixel coordinate in blending image, xw, ywFor world coordinates, 4 camera acquisitions demarcated
To 4 width images, it is divided into all around, calibration is exactly to find a camera to the point (x in world coordinate systemw, yw) arrive and be somebody's turn to do
One mapping relations of the coordinate (u, v) in the pixel coordinate system of camera acquired image, it is assumed that this mapping relations is
G(xw, yw)=p (u, v) (3)
Then a point in figure is merged by formula (1) and (2), can be converted world coordinates, this world coordinates
By formula (3), it is known that indexing that pixel in the camera institute acquired image, the main rope in upside of figure is merged
Draw the image of preceding camera acquisition, left side, right side mainly indexes a left side, and right side camera acquired image, downside mainly indexes
Lower section camera acquired image will then index two images, such as the upper left corner in four apex regions of fusion figure simultaneously
Region will index upside, left side camera acquired image simultaneously.
Pixel in one fusion figure, the index to acquisition image is a fixed mapping relations, therefore can be this
Mapping is made into a concordance list, when real-time rendering, blending image is generated can in real time by searching for this table.
System specific workflow:
Step 1: setting deserializer address, low-light (level) camera sample frequency, image size etc. parameter, complete to unstring
Setting serializer address is gone by deserializer after device initialization.
Step 2: master chip initialization low-light (level) camera CSI receives data port and receives image resolution ratio, sampling frequency
Rate, if overturning etc. simultaneously initializes ISP image signal processing unit and low-light (level) camera, by ISP image signal process list
Member sets the correct resolution ratio of output and sample frequency of low-light (level) camera, and opens low-light (level) camera and send ISP image
Signal processing unit sets the image data of specification.
Step 3: master chip obtains four circuit-switched datas, four tunnel brightness of image and coloration are merged, first corrects single fish eye lens
For the image of common 1280*720, using the overlapping region of adjacent camera two-by-two, algorithm finds out coincidence point and is fused into a width
The pixel of bigger image, tetra- road image of blending algorithm Shi Jiang falls in the position of final fusion results 1920*1080p image,
Sampling mapping in the past can seamless spliced four road image synthesis 360 degree of immersion rotatable images all the way.
Step 4: 360 degree of immersion rotatable images having merged of output are to display screen.
Claims (4)
1. it is a kind of based on the long large car viewing system away from transmission of low-light (level) camera synchronous acquisition, including it is installed on large car vehicle
The camera of body, it is characterised in that: the camera is four tunnel low-light (level) cameras, the output of the four tunnels low-light (level) camera
End has been electrically connected AHD serializer, and the AHD serializer comes with image signal processing unit, described image signal processing
The output end of unit is electrically connected by AHD coaxial line with the input terminal of deserializer, output end and the master chip electricity of the deserializer
Connection, the blending image system built in master chip will look around image and export outward；The blending image system includes that parameter is initial
Change unit and image co-registration concatenation unit, the parameter initialization unit passes sequentially through the included image of deserializer, AHD serializer
Signal processing unit and low-light (level) camera interconnect, and the output end of the low-light (level) camera passes sequentially through AHD serializer
Included image signal processing unit, deserializer are electrically connected with image co-registration concatenation unit, described image anastomosing and splicing unit
Output end is connect with display screen.
2. according to claim 1 grow the large car viewing system away from transmission based on low-light (level) camera synchronous acquisition,
Be characterized in that: the low-light (level) camera is 2,000,000 pixel camera heads, acquires vehicle body circumferential images with the frame per second of 60fps.
3. according to claim 1 grow the large car viewing system away from transmission based on low-light (level) camera synchronous acquisition,
Be characterized in that: the pixel of four tunnel low-light (level) camera images is fallen in fusion results 1920* by described image anastomosing and splicing unit
The position of 1080p image.
4. according to claim 1 grow the large car viewing system away from transmission based on low-light (level) camera synchronous acquisition,
It is characterized in that: output resolution ratio, sample frequency and the image size of described image signal processing unit control low-light (level) camera.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336970A (en) * | 2019-07-18 | 2019-10-15 | 广州健飞通信有限公司 | A kind of circuit and its signal synthesis method of multiple signals interface |
| CN112689083A (en) * | 2020-11-27 | 2021-04-20 | 深兰科技（上海）有限公司 | Vehicle-mounted camera configuration method and device, electronic equipment and storage medium |
| CN113891039A (en) * | 2021-09-17 | 2022-01-04 | 长春一汽富晟集团有限公司 | Image acquisition and processing system and method for vehicle-mounted all-round viewing system |
-
2018
- 2018-11-30 CN CN201821992463.0U patent/CN208956216U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336970A (en) * | 2019-07-18 | 2019-10-15 | 广州健飞通信有限公司 | A kind of circuit and its signal synthesis method of multiple signals interface |
| CN112689083A (en) * | 2020-11-27 | 2021-04-20 | 深兰科技（上海）有限公司 | Vehicle-mounted camera configuration method and device, electronic equipment and storage medium |
| CN112689083B (en) * | 2020-11-27 | 2022-11-25 | 深兰科技（上海）有限公司 | Vehicle-mounted camera configuration method and device, electronic equipment and storage medium |
| CN113891039A (en) * | 2021-09-17 | 2022-01-04 | 长春一汽富晟集团有限公司 | Image acquisition and processing system and method for vehicle-mounted all-round viewing system |
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