CN106840109A - A kind of single pixel imaging hardware system based on difference - Google Patents
A kind of single pixel imaging hardware system based on difference Download PDFInfo
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- CN106840109A CN106840109A CN201710048372.5A CN201710048372A CN106840109A CN 106840109 A CN106840109 A CN 106840109A CN 201710048372 A CN201710048372 A CN 201710048372A CN 106840109 A CN106840109 A CN 106840109A
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Abstract
The invention discloses a kind of single pixel imaging hardware system based on difference, including：First single pixel sensor, for receiving modulated finishing from the next flashlight to be measured of parked image reflection；Second single pixel sensor, for environment of accepting noise and ambient light；Luminous power harvester, for realizing that the first single pixel sensor and the second single pixel sensor gather the calculus of differences of numerical value, realizes undelayed hardware calculus of differences, and preserve measurement Value Data；The first single pixel sensor and the second single pixel sensor are same model and setting close to each other.The present invention is linked on the luminous power harvester with calculation function using two single pixel sensors of same model, realize the calculus of differences of measured value, the disturbance that ambient noise is caused is reduced, the robustness that classical single pixel imaging system changes to ambient noise and ambient light is enhanced.
Description
Technical field
The present invention relates to target detection identification and imaging field, more particularly, to single pixel imaging hardware system.
Background technology
The researcher of RICE universities of the U.S. successfully develops single pixel camera first based on compressive sensing theory within 2006,
Experimentally demonstrating people can realize high-definition picture signal acquisition using simpler cheap sensor device
Possibility.The Experimental Hardware structure of RICE universities also becomes the typical hardware configuration of single pixel imaging field, majority compression sense
Know that the theoretical application in terms of image procossing is all based on the optimization of the hardware configuration.
During classical single pixel imaging experiment, DMD is projected to from the irreflexive rays pass through lens of original image
On, incident light is carried out by selective deflection according to the program for having set by DMD, a part of light is passed through into another lens
Reflex on single pixel sensor, be converted into data signal by analog-digital converter is controlled to sample by computer, obtains a series of
Measured value, the last reconstruction image of the algorithm that undergoes reconstruction.
During the signal restoring of single pixel system, the accuracy of measurement signal collection largely determines signal
The quality of recovery.Repeating when RICE universities classics single pixel is tested it can be found that when measuring value collection, because light source is penetrated
The light for going out is subject to the influence such as original image diffusing reflection, DMD reflections, lens loss, and when reaching single pixel sensor, the energy of light is
Through smaller, measured value is directly resulted in smaller in itself；Similar reflectivity causes value between different measured values between measurement basic matrix
Change it is smaller.Simultaneously because whole system light path is more long, ambient noise and ambient light change for measured value influence compared with
Greatly, the personnel around experimental situation walk about can all cause irreversible influence to measured value, and experimental result is often unstable.Should
Typical hardware configuration the not robust that noise and ambient light change directly limit in itself single pixel systematic difference scene and
Recovery effect.
The content of the invention
The present invention is to overcome above-mentioned situation not enough, there is provided a kind of to possess very strong to ambient noise and ambient light change
The single pixel imaging hardware system based on difference of rod, including：
First single pixel sensor, for receiving modulated finishing from the next signal to be measured of parked image reflection
Light；
Second single pixel sensor, for environment of accepting noise and ambient light；
Luminous power harvester, for realizing the first single pixel sensor and the second single pixel sensor collection
The calculus of differences of numerical value, and preserve measurement Value Data；
The first single pixel sensor and the second single pixel sensor are same model and setting close to each other.
Preferably, also include：LED light source, for providing light source；Dmd chip, for directly receiving what LED light source sent
Incident light simultaneously reflects incident illumination on parked image.
Preferably, also including the first lens, for converging the flashlight to be measured come from the reflection of parked image.
The present invention is linked into the luminous power harvester with calculation function using two single pixel sensors of same model
On.Wherein the first single pixel sensor is normally received and carrys out the modulated light for making that parked image is reflected back, second single picture
Plain sensor is placed in side, receives the change light of environment, ambient noise.In luminous power harvester with calculation function
The value that two sensors are transmitted is subtracted each other in portion, and environmental change is on the one hand offset in the case where system resources in computation is not consumed
The disturbance brought with ambient noise, on the other hand offsets the DC biasings of machine itself, and the value after subtracting each other more is close to measurement
The actual value of value, improves signal accuracy.Accuracy measured value vector higher makes system primary signal recovery effect more preferable.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is schematic structural view of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of single pixel imaging hardware system based on difference designed by the present invention is along light path bag
Include LED light source 1, the first convex lens 2, dmd chip 3, the second convex lens 4, parked image 5, the 3rd 6, first single picture of convex lens
Plain sensor 7, the second single pixel sensor 9, luminous power harvester 8, PC 10.
LED light source 1, for providing light source.
Dmd chip 3, for directly receiving incident light that LED light source 1 sends and reflecting incident illumination in parked image 5
On.DMD is a kind of reflective slms of TIX (Ti) exploitation, and it is by a series of drivable
Small minute surface composition, each small minute surface is suspended on a single sram cell, can be revolved around a fixed hinge
Turn.The direction of each micro mirror can be controlled when using by random number generator (RNG) ,+12 ° can be done by relative normal in the horizontal plane
Or -12 ° of deflections in direction, the deflection that can set+12 ° of directions reflected incident light on single pixel sensor, -12 ° of directions
Deflection reflect incident light to outside whole system, be not involved in system work.The light direct irradiation that LED light source 1 is sent exists
Then dmd chip 3 is reflected on parked image 5, and the light direct irradiation that relatively former classical system LED light source 1 is sent is being treated
Restored image 5 is impinged upon on dmd chip 3 again after diffusing reflection, and light loss is substantially reduced, and then effectively increases the effect of image restoration
Really.
First single pixel sensor 7, for receiving modulated finishing from the next signal to be measured of the reflection of parked image 5
Light.
Second single pixel sensor 9, for the change of environment of accepting noise and ambient light.
Luminous power harvester 8, for realizing the first single pixel sensor 7 and the second single pixel sensor 9
The calculus of differences of numerical value is gathered, and preserves measurement Value Data；
The first single pixel sensor 7 and the second single pixel sensor 9 are same model and setting close to each other, purpose
It is effectively to eliminate systematic error.
It is linked into calculation function using the first single pixel sensor 7 and the second single pixel sensor 9 of same model
On luminous power harvester 8.Wherein the first single pixel sensor 7 normally receives come that parked image reflects back modulated and makes
Light, the second single pixel sensor 9 be placed in side, receive environment change light and ambient noise.With calculation function
Luminous power harvester 8 inside the value that two sensors are transmitted is subtracted each other, do not consuming the situation of system resources in computation
Further aspect offsets the disturbance that environmental change and ambient noise are brought, and on the other hand offsets the DC biasings of machine itself, subtracts each other it
Value afterwards is more close to the actual value of measured value, improves signal accuracy, enhances classical single pixel imaging system to environment
Noise and the robustness of ambient light change.Accuracy measured value vector higher makes system primary signal recovery effect more preferable.
The first convex lens 2, the dmd chip 3 and parked figure are provided between the LED light source 1 and the dmd chip 3
As being provided with the second convex lens 4 between 5, the single pixel sensor 7 of parked image 5 and first is provided with the 3rd convex lens 6, convex lens
Effect is effective converged light, so as to reduce light loss.The 3rd convex lens 6 are creatively increased relative to former Classic Experiments,
Further converged light, and then effectively increase the effect of image restoration.
PC 10, the measurement basic matrix for that will design is uploaded to the dmd chip 3.
The concrete methods of realizing and step that this is based on the single pixel imaging hardware system of difference are as follows：
Modes of emplacement according to Fig. 1 places each hardware device, and adjustment light path makes the one of reflection angle of dmd chip 3
Light directive parked image 5, outside the light directive system of another reflection angle.Adjust the first convex lens 2, second convex
The convex lens 6 of lens 4 and the 3rd so that the light reflected by parked image 5 can focus on the plane of the first single pixel sensor 8
On.First single pixel sensor 7 and the second single pixel sensor 9 are respectively connected to luminous power harvester 8.Connected by coaxial line
Dmd chip 3 and luminous power harvester 8 are connect, dmd chip 3 is set to internal clocking triggering, be sent out start pulse signal
Pattern, external trigger mode is set to by luminous power harvester 8, the synchronization tested between two hardware devices after being provided with
Situation.Resolution ratio and sample rate according to required restored image generate a series of measurement basic matrixs, and measurement basic matrix is passed through
USB cable is uploaded in the region of memory in dmd chip 3.Setting result is stored in machine and carries caching in luminous power harvester 8
The good measured value of difference is imported USB flash disk by region, wait after terminating.Dmd chip 3 is controlled to start whole experiment by PC 10, etc.
Treat that experiment is completed.The measured value that calculus of differences will have been finished is copied out by USB flash disk, such that it is able to carry out the primary signal of PC 10
Restore experiment.
Above disclosed is only a kind of preferred embodiment of the invention, can not limit the power of the present invention with this certainly
Sharp scope, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (3)
1. a kind of single pixel imaging hardware system based on difference, it is characterised in that including：
First single pixel sensor, for receiving modulated finishing from the next flashlight to be measured of parked image reflection；
Second single pixel sensor, for the change of environment of accepting noise and ambient light；
Luminous power harvester, for realizing the first single pixel sensor and the second single pixel sensor collection numerical value
Calculus of differences, and preserve measurement Value Data；
The first single pixel sensor and the second single pixel sensor are same model and setting close to each other.
2. the single pixel imaging hardware system based on difference according to claim 1, it is characterised in that also include：
LED light source, for providing light source；
Dmd chip, for directly receiving incident light that LED light source sends and reflecting incident illumination in parked image.
3. the single pixel imaging hardware system based on difference according to claim 2, it is characterised in that also saturating including the 3rd
Mirror, for converging the flashlight to be measured come from the reflection of parked image.
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| CN108551541A (en) * | 2018-03-26 | 2018-09-18 | 深圳市智能机器人研究院 | A kind of imaging system and its imaging method that low cost is highly sensitive |
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Application publication date: 20170613 |