CN106341597A - Spherical-lens non-focusing digital imaging system based on visual sensor - Google Patents
Spherical-lens non-focusing digital imaging system based on visual sensor Download PDFInfo
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- CN106341597A CN106341597A CN201610811017.4A CN201610811017A CN106341597A CN 106341597 A CN106341597 A CN 106341597A CN 201610811017 A CN201610811017 A CN 201610811017A CN 106341597 A CN106341597 A CN 106341597A
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- vision sensor
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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
- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The invention belongs to the image acquisition technology field and especially relates to a spherical-lens non-focusing digital imaging system based on a visual sensor. The imaging system can be used for various kinds of large-scale astronomical telescope and other optical systems and is used to collect unfocused images on an emergent surface and directly carry out image restoration on the unfocused images. The system is formed by a large-scale lens 1, a visual sensor group 2, a visual sensor control circuit 3, an image acquisition card 4 and an upper computer 5. Light of starry sky and celestial bodies traverses the large-scale lens 1 and is converged on the visual sensor group 2. The visual sensor control circuit 3 makes surface array visual sensors collect data and output a gray value of a digital signal. In the invention, the visual sensor group 2 spliced by the small surface array visual sensors is used to carry out image acquisition before the large-scale lens 1 carries out focusing. Cost of the visual sensor is cheaper than an optical compensation system and the visual sensor is simple to realize.
Description
Technical field
The invention belongs to acquisition technology field is and in particular to one kind can be used for the light such as all kinds of large-scale astronomical telescopes
System, effect is to gather unfocused image on exit facet, and non-focusedimage is directly carried out with the base of image restoring
Spherical lenss non-focusing digital imaging system in vision sensor.
Background technology
For the optical systems such as my telescope of large-scale astronomical, the remote celestial body such as collection starry sky needs very bigbore
Coquille is as object lens.The lens general diameter that these Large optical systems are selected can reach hundred meters of magnitudes, for example: the U.S.
300 meters of telescopes of arecibo diameter, Bonn 100 rice diameter telescope of Germany etc..The diameter of large-scale astronomical telescope is very
Greatly, this also results in the problem that much satisfaction avoids.As excessive object lens in diameter, its focal length also can be very big, and the result causing is just
It is while wasting space, the aberration of the image after focusing is extremely difficult to require, and needs much follow-up optical compensation
System.And also can introduce more other errors while follow-up optical system aberration for compensation, these errors all can be
It is embodied in eventually on formed image.The cost manufacturing subsequent optical system can be very big.In addition, super large caliber lens are such in lens
In big focal range, it is difficult to ensure that the position of the optical system of back coincide with the position of anticipation completely.Large Aperture Lenses
Also have heating problem.Large Aperture Lenses focusing power than more than 1,100 times by force of common lens, so after they focus on
Temperature can height extremely, particularly when detecting the sun this near-earth fixed star.Ask for the heating after lens focuss
Topic, designer also will comprehensively consider how to design to prevent this high temperature that can melt all after focusing.In network inspection
Suo Shi, we can find a lot of restored methods with regard to broad image, such as: " based on the symmetrical broad image method of reducing of circle "
Edge function of middle employing etc..What they were targeted is mostly the unsharp calculating in the image having obtained, rather than multiple
The quality of original image script.So, the present invention looks for another way, the neural network algorithm of selection, in conjunction with the vision sensor of splicing
Array is it is achieved that a kind of need not focus on the large spherical surface lenticular image system that just image can be acquired and reduce.
Content of the invention
It is an object of the invention to provide a kind of it can be avoided that the problem of the heating of large-scale convex lenss and aberration based on regarding
Feel the spherical lenss non-focusing digital imaging system of sensor.
The object of the present invention is achieved like this:
A kind of spherical lenss non-focusing digital imaging system of view-based access control model sensor, by large-scale lens 1, vision sensor
Group 2, vision sensor control circuit 3, image pick-up card 4 and host computer more than 5 part composition.The light of starry sky and celestial body passes through large-scale
Lens 1, and be converged in vision sensor group 2；Vision sensor control circuit 3 chain of command battle array vision sensor is gathering number
According to the gray value of output digit signals；The digital signal of vision sensor group 2 collection is by the core of vision sensor control circuit 3
Acquired in heart controller, and it is transferred to image pick-up card 4；Host computer 5 data that image pick-up card is adopted is analyzed and
Reduction, finally realizes digital image.
Vision sensor group 2 is one group of face battle array vision sensor, the curved surface vision sensor of the solid shape being stitched together
Array.
Vision sensor group be shaped as the hemisphere face vision sensor group parallel with lens surface, be located at equiphase surface on
Curved surface vision sensor group or be located at fixed position plane visual sensor group.
Vision sensor control circuit 3 is controlling the work of each little face battle array vision sensor.
Host computer realizes digital image by algorithm.
The digital imaging algorithms that host computer adopts are neural network algorithms.
The beneficial effects of the present invention is:
Using the advance being focused in large-scale lens 1 by the vision sensor group 2 that little face battle array vision sensor is stitched together
Row image acquisition.Vision sensor cost is cheap for compensation optical system, and realizes simple.
After eliminating follow-up optical system, large-scale lens 1 need not focus on and just can complete to be imaged, and save very big sky
Between it is most important that eliminating the trouble of large-scale lens 1 and the assembling of subsequent optical system it is therefore prevented that by subsequent optical system institute
The various aberrations introducing and the error put of position.
When preventing large-scale lens 1 to focus on, the high temperature of focus.
The present invention is transmitted through volume of data, and the data measured by vision sensor group 2 is passed to host computer.Host computer
The image application neural network algorithm of out of focus is reduced.Structure is simple and clear, and data is accurately and reliably.
Brief description
Fig. 1 is the spherical lenss non-focusing digital imaging method overall construction drawing of vision sensor.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described further.
Wherein (1) is large-scale lens.(2) it is ccd sensor group.(3) it is vision sensor control circuit.(4) it is image
Capture card.(5) it is host computer.
The present invention relates to a kind of spherical lenss non-focusing digital imaging method of view-based access control model sensor, the present invention can by with
In optical systems such as all kinds of large-scale astronomical telescopes, effect is to gather unfocused image on exit facet, and to not focusing on
Image carries out digital image.The present invention proposes a kind of collection of the out-of-focus image using very many low profile battle array vision sensors
Instrument.The present invention it can be avoided that large-scale convex lenss focus on heating and aberration problem.
The present invention is by large-scale lens (1), vision sensor group (2), vision sensor control circuit (3), image pick-up card
(4) form with a few part of host computer (5).Large-scale lens (1) gather the light of starry sky and celestial body, and the light of collection is beaten in vision sensor
In group (2).Vision sensor control circuit (3) chain of command battle array vision sensor comes gathered data, the gray scale of output digit signals
Value.The each pixel of digital signal that vision sensor group (2) gathers has corresponding gray value.Vision sensor group (2) is adopted
The digital signal of collection is acquired in the core controller of vision sensor control circuit (3), and is transferred to image pick-up card
(4).Host computer (5) data incoming to image pick-up card is analyzed and reduces, and is ultimately imaged.Eliminate follow-up optical system
After system, large-scale lens (1) need not focus on and just can complete to be imaged, and save very big space it is most important that eliminating large-scale
Lens (1) and the assembling of subsequent optical system and the trouble that controls are it is therefore prevented that due to the introduced various aberrations of subsequent optical system
The error put with position.When preventing large-scale lens (1) to focus on, the issuable high temperature of focus.
The present invention is by large-scale lens 1, vision sensor group 2, vision sensor control circuit 3, image pick-up card 4 and upper
Machine more than 5 part forms.Large-scale lens 1 gather the light of starry sky and celestial body, and the light of collection is beaten in vision sensor group 2.Vision passes
Sensor control circuit 3 chain of command battle array vision sensor comes gathered data, the gray value of output digit signals.Vision sensor group 2
The digital signal of collection is acquired in the core controller of vision sensor control circuit 3, and is transferred to image pick-up card 4.
The data that host computer 5 is adopted to image pick-up card adopts the algorithm of neutral net, is analyzed and reduces, is ultimately imaged.
Large-scale lens 1 are the heavy caliber object lens of large-scale astronomical system, and its diameter is very big, reaches hundred meters of magnitudes.Bore is big
Object lens be conducive to the absorption of light, luminous very faint, very remote star can be seen at night.
Vision sensor group 2 is one group of face battle array vision sensor.Every unilateral battle array vision sensor in vision sensor group 2
Area less, near apart from the position of lens, vision sensor be shaped as face battle array, distance reaches to a certain degree, using linear array.
Vision sensor group 2 is the curved surface vision sensor battle array of the solid shape being stitched together by such low profile battle array vision sensor
Row.Ccd vision sensor is uniformly arranged in after large-scale lens, and is full of whole lens as far as possible.When light is from large-scale
During lens 1 incidence, because the converging action of large-scale lens 1 changes light path, the light of outgoing can be towards the focus side of large-scale lens 1
To convergence.Vision sensor group 2 is located between large-scale lens 1 and focus, apart from large-scale lens 1 apart from for x.Due to visual sensing
Not in image planes, also not in the focus of large-scale lens 1, the image that obtains is simultaneously unintelligible for the position of device group 2.It but thus is avoided that
The focus high temperature that large-scale lens 1 cause to the convergence of light.And vision sensor group 2 is using much little face battle array visual sensing
The mode of device splicing gets, and partial array vision sensor is easily manufactured, and for manufacture and design subsequent optical system, adopts
To be saved much with the cost that little face battle array vision sensor is spliced into large-scale vision sensor group 2.Vision sensor group 2
Shape is not fixed, and can be spliced into the plane vertical with large-scale lens 1 optical axis or parallel with large-scale lens 1 surface
The all equal equiphase surface of each light path on sphere or face.
Vision sensor control circuit 3 controls the work of each little face battle array vision sensor.Meanwhile, vision sensor control
Circuit 3 processed also control temperature collection circuit, data transfer etc..Vision sensor control circuit 3 is the core of whole system.Depending on
Feel that the data that sensor group 2 is adopted passes to vision sensor control circuit 3, vision sensor control circuit 3 control line first
Cable, is sent to image pick-up card 4 the data of collection.
Image pick-up card 4 is the board receiving view data.Host computer 5 is the computer with computing function.Host computer
The image with neural network algorithm restoring data.Because the focal length of lens, diameter, the position x of vision sensor face battle array, vision pass
The gray value that sensor face battle array does not record is all known.The data that host computer 5 is easy to vision sensor group 2 is gathered only is entered
Row image restoring, is imaged well by calculating.
Large-scale lens 1 are mounted on huge installing rack, i.e. observatory.Because technology now can not possibly directly founding
Go out so big lens, so being typically spliced into a bulk of lens with each good position of founding.
When being embodied as, designer is by obtaining its item to the design of large-scale lens 1 and actual measurement
Parameter, such as radius of curvature, refractive index, optical path difference of each point etc..So pass through calculate be assured that beam projecting etc.
Phase face, the angle of outgoing.According to these parameters, designer can design the shape of the vision sensor group 2 wanted, such as: and
The parallel hemisphere face vision sensor group 2 of lens surface, be located at equiphase surface on curved surface vision sensor group, be located at fixed bit
The plane visual sensor group 2 put.Then designer can be by making accurate mould, by each little face battle array visual sensing
Each position accurately put by device.Because the diameter of large-scale lens 1 is very big, more than ten thousand times of face battle array vision sensor, face battle array vision
The arrangement of sensor can be approximate regard perfect sphere as, very big error will not be introduced.
After light passes through lens, ccd is arranged in a certain position apart from lens, and be full of entirely big as far as possible
The geometry of type lens.Ccd is different apart from the distance of large-scale lens, according to the transportation law of large-scale lens light, visual sensing
The size of device has a dynamic scope.Adopting face battle array arrangement in the position away from closer to the lens is circular vision sensor,
Light is all introduced into ccd.Distance exceedes certain limit, and light has been provided with certain convergence effect, using the arrangement mode of linear array.
The difference of distance, is precisely calculated ccd size according to geometric optics.
After designing the position of vision sensor group 2, follow-up data transfer work relies on accurately sequencing contro
To realize.The acp chip of vision sensor control circuit can control the synchronous reception optical signal of vision sensor group 2, obtains each
The gray value of individual pixel.
The making of vision sensor control circuit can be solved well with debugging technique application prior art.Regard in making
When feeling sensor control circuit, designer can design the printed circuit board of multilamellar, from high precision electro subcomponent, rationally
Arrangement layout, each noise like of control circuit to allow circuit reach good working order, accomplish carrying of precision and function
Rise.
The selection of image pick-up card is how the data transmission interface of vision sensor control circuit selects.Designer is led to
Cross corresponding Data Transport Protocol to select data-interface, cable and data collecting card.When data is successfully by circuit transmission
After on host computer, with Digital Signal Processing, image processing tool can be removed to the noise of gathered image.Lead to again
Cross various calculating with algorithm it is possible to reduce the image that large-scale lens 1 are seen.
The superior part of the present invention also resides in can be by controlling a part of vision sensor work, and another part vision passes
Sensor does not work.So can very easily probe into the more features in image capturing, such as: select to allow a part of banding
Vision sensor works, and probes into local tomography and whether can reduce complete image, and image be reduced after resolution such as
How etc..Also had a lot based on the scientific research that the present invention can be carried out.
Claims (6)
1. a kind of view-based access control model sensor spherical lenss non-focusing digital imaging system it is characterised in that: by large-scale lens
(1), vision sensor group (2), vision sensor control circuit (3), image pick-up card (4) and a few part of host computer (5) composition.
The light of starry sky and celestial body pass through large-scale lens (1), and be converged in vision sensor group (2)；Vision sensor control circuit
(3) chain of command battle array vision sensor comes gathered data, the gray value of output digit signals；The number that vision sensor group (2) gathers
Word signal is acquired in the core controller of vision sensor control circuit (3), and is transferred to image pick-up card (4)；Upper
Machine (5) is analyzed to the data that image pick-up card is adopted and reduces, and finally realizes digital image.
2. the spherical lenss non-focusing digital imaging system of a kind of view-based access control model sensor according to claim 1, it is special
Levy and be: vision sensor group (2) is one group of face battle array vision sensor, the curved surface vision sensor of the solid shape being stitched together
Array.
3. the spherical lenss non-focusing digital imaging system of a kind of view-based access control model sensor according to claim 1, it is special
Levy and be: vision sensor group be shaped as the hemisphere face vision sensor group parallel with lens surface, be located at equiphase surface on
Curved surface vision sensor group or be located at fixed position plane visual sensor group.
4. the spherical lenss non-focusing digital imaging system of a kind of view-based access control model sensor according to claim 1, it is special
Levy and be: vision sensor control circuit (3) is controlling the work of each little face battle array vision sensor.
5. the spherical lenss non-focusing digital imaging system of according to claim 1, a kind of view-based access control model sensor, it is special
Levy and be: host computer realizes digital image by algorithm.
6. the spherical lenss non-focusing digital imaging system of a kind of view-based access control model sensor according to claim 1, it is special
Levy and be: the digital imaging algorithms that host computer adopts are neural network algorithms.
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| CN201610811017.4A CN106341597B (en) | 2016-09-08 | 2016-09-08 | A kind of spherical lens non-focusing digital imaging system of view-based access control model sensor |
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| CN201610811017.4A CN106341597B (en) | 2016-09-08 | 2016-09-08 | A kind of spherical lens non-focusing digital imaging system of view-based access control model sensor |
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| US8966528B2 (en) * | 2010-10-14 | 2015-02-24 | Sony Corporation | System and method of providing an interactive menu through streaming video |
| CN104469183A (en) * | 2014-12-02 | 2015-03-25 | 东南大学 | Optical field capture and post-processing method for X-ray scintillator imaging system |
| CN105407265A (en) * | 2014-09-05 | 2016-03-16 | 佳能株式会社 | Interchangeable lens apparatus, image capturing apparatus and focusing program |
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2016
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8966528B2 (en) * | 2010-10-14 | 2015-02-24 | Sony Corporation | System and method of providing an interactive menu through streaming video |
| CN105407265A (en) * | 2014-09-05 | 2016-03-16 | 佳能株式会社 | Interchangeable lens apparatus, image capturing apparatus and focusing program |
| CN104198056A (en) * | 2014-09-25 | 2014-12-10 | 中国科学院国家天文台南京天文光学技术研究所 | Schack hartmann wavefront sensor for low contrast expansion source telescope |
| CN104469183A (en) * | 2014-12-02 | 2015-03-25 | 东南大学 | Optical field capture and post-processing method for X-ray scintillator imaging system |
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