CN201397136Y - High-definition optical remote sensing payload system based on Hadamard transform encoding - Google Patents
High-definition optical remote sensing payload system based on Hadamard transform encoding Download PDFInfo
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- CN201397136Y CN201397136Y CN2009200326458U CN200920032645U CN201397136Y CN 201397136 Y CN201397136 Y CN 201397136Y CN 2009200326458 U CN2009200326458 U CN 2009200326458U CN 200920032645 U CN200920032645 U CN 200920032645U CN 201397136 Y CN201397136 Y CN 201397136Y
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Abstract
The utility model relates to a high-definition optical remote sensing payload system based on Hadamard transform encoding, which consists of an imaging lens, a detector and a Hadamard encoding template, and the imaging lens, the Hadamard encoding template and the detector are sequentially arranged on the same optical axis. The system has the advantages of multi-channel simultaneous detection, highenergy input, simple structure, low cost, flexible use, small equipment size and light weight.
Description
Technical field
The utility model belongs to optical field, relates to a kind of high-resolution optical remote sensing load system, relates in particular to a kind of high-resolution optical remote sensing load system based on the Hadamard transform coding.
Background technology
In high-resolution optical remote sensing useful load system development, very crucial constraint is the contradiction between spatial resolution and detector pixel size and the system bulk weight etc.In order to realize high resolving power, wish that the detector pixel dimension is the smaller the better, the longer the better for the optical system focal length.But the growth of optical system focal length can increase difficulty and load volume and weight that processing is debug, and the first image device of high-sensitive high-end statuette then can only dependence on import.Be subjected to the constraints limit of aspects such as domestic industrial base and detector manufacturing, increase the optical system focal length, reduce method such as detector pixel dimension if rely on fully in high-resolution optical camera development, its difficulty is quite big.
Resolution raising method high resolving power Aero-Space at home and abroad progressively are applied with beginning in the camera, its ultimate principle is to adopt special focal plane method or multiple image fusion treatment technology, improve sample frequency indirectly, reduce spectral aliasing, thereby obtain more high-resolution image detail information, improve the spatial resolution of image.This method is divided two kinds: oversampler method and inferior pixel method.
Oversampler method is to adopt one to overlap detector, gathers the different multiple images constantly of same target, through special image fusion processing method, obtains the new images after resolution improves, and the quantity of resolution raising multiple and low resolution picture is closely related.In theory, if improve resolution n doubly, then need n at least
2Width of cloth low-resolution image just can obtain the feasible solution of ill-condition equation, owing to the degree of correlation of information between method for registering and the image, often needs 2n in the practical application
2The above low resolution original image of the width of cloth could obtain reliable high-definition picture.This technology requires remote-sensing flatform that high-precision sensing regulating power is arranged when using, and requires remote sensor repeatedly heavily to visit simultaneously, so that same terrain object is carried out several imagings.
Inferior pixel method adopts the special arrangement of the mutual locus of many group detectors, gathers the multiple image of same target synchronization, combines with image fusion processing method and improves resolution.Typical case's implementation method is to adopt the optical prism joining method, and the light-sensitive surface of two detectors is at the pixel direction pixel that staggers half, also can be at 45 ° of directions pixel that respectively staggers half.Two detector imagings simultaneously, two width of cloth images obtain high-resolution new images through after the special processing.The shortcoming of this method is the splicing body complexity, and prism divides picture to reduce the luminous energy that incides on the detector target surface in addition.
The Hadamard transform technology then is a kind of light modulation techniques that is similar to Fourier transform, it adopts the binary orthogonal transformation based on hadamard matrix, have hyperchannel and survey advantage with high light flux simultaneously, be applied in the multi-channel spectral technical field of imaging over nearly 40 years.
The utility model content
In order to solve the above-mentioned technical matters that exists in the background technology, but the utility model provides that a kind of hyperchannel is surveyed simultaneously, the high-energy input, simple in structure, cost is low, use-pattern is flexible, equipment volume is little, lightweight high-resolution optical remote sensing load system based on the Hadamard transform coding.
Technical solution of the present utility model is: the utility model provides a kind of high-resolution optical remote sensing load system based on the Hadamard transform coding, comprise imaging mirror and detector, its special character is: described high-resolution optical remote sensing load system based on the Hadamard transform coding also comprises the Adama coding templet; Described imaging mirror, Adama coding templet and detector are set in turn on the same optical axis.
Above-mentioned Adama coding templet is that the one side at sheet glass is coated with Adama coding rete.
One side relative with being coated with Adama coding rete on the above-mentioned sheet glass is coated with anti-reflection film.
Above-mentioned Adama coding templet and detector glue together or are close to.
The one side and the detector that are coated with Adama coding rete on the above-mentioned sheet glass glue together or are close to.
Above-mentioned Adama coding rete is that two-dimentional Hadamard transform loop coding of employing or one dimension Hadamard transform loop coding are formed.
Above-mentioned Adama coding rete is chromium film, silverskin or aluminium film.
Above-mentioned imaging mirror is refracting telescope, catoptron or catadioptric mirror.
Above-mentioned detector is charge coupled device ccd or complementary metal oxide semiconductor (CMOS) CMOS optoelectronic sensor.
Above-mentioned detector is planar array detector or linear array detector.
The utility model has the advantages that:
But 1 hyperchannel is surveyed simultaneously and the high-energy input.The utility model utilizes Hadamard transform that the detector pixel is segmented coded modulation to improve resolution, has hyperchannel and surveys advantage with the high-energy input quantity simultaneously.Realizing under the condition of same spatial resolution that the mean square deviation of signal can reduce that (m * n/4) doubly, correspondingly, signal to noise ratio (S/N ratio) can improve (m * n)
1/2/ 2 times.
2, simple in structure, volume is little, in light weight, with low cost.The utility model can be under the condition of not changing any technical parameter of conventional imaging equipment, only before the detector focal plane, increase the template of making by the Hadamard transform coding, by computer decoding handle can implementation space resolution raising, have simple in structure, volume is little, in light weight, advantage that cost is low.
3, use-pattern is versatile and flexible.The degree that the utility model load system intermediate-resolution improves is by the exponent number decision of Hadamard transform coding, need not the technical parameter and the structure of the equipment of changing, by the Adama coding templet of selecting different rank and pattern the required spatial resolution that reaches can be set flexibly, use-pattern is versatile and flexible.
Description of drawings
Fig. 1 is the structural representation of the utility model system;
Fig. 2 is matching relationship synoptic diagram between the utility model Adama coding film and the detector.
Embodiment
Referring to Fig. 1, the utility model provides a kind of high-resolution optical remote sensing load system based on the Hadamard transform coding, comprises imaging mirror 4, detector 3 and Adama coding templet 5; Imaging mirror 4, Adama coding templet 5 and detector 3 are set in turn on the same optical axis 6.
Adama coding templet 5 is that the one side at sheet glass 1 is coated with Adama coding rete 2, the one side relative with Adama coding rete 2 is coated with anti-reflection film or only is coated with Adama coding rete 2 in the one side of sheet glass 1, and sheet glass 1 is coated with the one side and detector 3 gummeds of Adama coding rete 2 or is close to placement.
The surface of sheet glass 1 is coated with Adama coding rete 2 and forms Adama coding templets 5, plated film regional light tight, and uncoated zone all sees through light.Another surface of sheet glass 1 is plated film or be coated with anti-reflection film to increase transmitance not.
Adama coding rete 2 is that two-dimentional Hadamard transform loop coding of employing or one dimension Hadamard transform loop coding are formed.When Adama coding templet 5 adopted two-dimentional Hadamard transform loop coding, each coding unit comprised m (push away and sweep direction) * individual code element of n (sweeping direction perpendicular to pushing away), and its effect is a Hadamard transform coding of realizing that exponent number is m * n.Each row of Adama coding templet is swept direction and is aligned in sequence with m * n coding unit pushing away, and they constitute a complete Adama coded sequence jointly.Different with two-dimensional phase is, one dimension Hadamard transform loop coding is the situation that is equal to m=1 in the two-dimentional Hadamard transform loop coding or n=1.When m=1, to sweep director space resolution constant pushing away for equipment, sweeping director space resolution and improve (n-1) doubly perpendicular to pushing away; When n=1, equipment is swept director space resolution and is improved (m-1) doubly pushing away, in that to sweep director space resolution constant perpendicular to pushing away.The size of each Adama coding unit and detector 3 each pixel measure-alike, the position is corresponding one by one with detector 3 pixel strictnesses.
Adama coding rete 2 is metal films such as chromium film, silverskin or aluminium film, or other material, and it mainly acts on is make plated film regional light tight, and uncoated zone all sees through light.
On Adama coding rete 2, send in the computer processing system after digitizing by the signal that detector 3 receives after target is encoded by the Adama coding templet with target imaging for imaging mirror 4.Imaging mirror 4 is various forms such as refracting telescope, catoptron or catadioptric mirror, main effect be with target imaging on Adama coding rete 2.
Referring to Fig. 2, high-resolution optical remote sensing load system employing based on the Hadamard transform coding provided by the utility model pushes away the mode of sweeping and carries out work, sweep direction target is carried out imaging along pushing away, 3 one pairing target sizes of pixel of the every inswept detector of equipment are gathered a secondary data.
From the coded data that detector 3 obtains, extract the Adama coded sequence signal of sweeping in each row of direction the same target that m * n pixel gather constantly in difference along pushing away.This m * n the Adama coded sequence signal that extracts carried out fast handmard transform decoding, finally obtain spatial resolution and push away the conventional imaging equipment sweeping mode work but encode and sweep direction and improve (m-1) doubly and sweeping direction and improve (n-1) echo signal doubly pushing away perpendicular to pushing away than same the employing.
Push away the optical imaging apparatus of sweeping mode work with the routine employing and compare, optical system of the present utility model is complete Entirely constant, image-forming principle is identical, and detector 3 frame frequencies are constant, and each parameter of remote sensor also need not be changed, and is unique Same is that the utility model has increased Adama coding templet 5 before the detector focal plane, by the computer decoding place Reason realize target spatial resolution is swept that direction improves (m-1) doubly and is being swept direction and improve (n perpendicular to pushing away pushing away-1) doubly.
With adopt long-focal distance optical system and statuette unit detector and realize the imaging device phase of high spatial resolution Ratio, the utility model is under the condition that realizes same spatial resolution, and the optical system focal length can foreshorten to its 1/m, the frame frequency of detector also is reduced to its 1/m. To the reduction of detector frame frequency requirement, so that remote sensor Become possibility at a high speed high than high-resolution imaging under the condition.
Claims (10)
1, a kind of high-resolution optical remote sensing load system based on the Hadamard transform coding comprises imaging mirror and detector, it is characterized in that: described high-resolution optical remote sensing load system based on the Hadamard transform coding also comprises the Adama coding templet; Described imaging mirror, Adama coding templet and detector are set in turn on the same optical axis.
2, the high-resolution optical remote sensing load system based on Hadamard transform coding according to claim 1 is characterized in that: described Adama coding templet is that the one side at sheet glass is coated with Adama coding rete.
3, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 2 is characterized in that: one side relative with being coated with Adama coding rete on the described sheet glass is coated with anti-reflection film.
4, according to claim 1 or 2 or 3 described high-resolution optical remote sensing load systems based on the Hadamard transform coding, it is characterized in that: described Adama coding templet and detector glue together or are close to.
5, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 4 is characterized in that: the one side and the detector that are coated with Adama coding rete on the described sheet glass glue together or are close to.
6, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 5 is characterized in that: described Adama coding rete is that two-dimentional Hadamard transform loop coding of employing or one dimension Hadamard transform loop coding are formed.
7, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 1 is characterized in that: described Adama coding rete is chromium film, silverskin or aluminium film.
8, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 1, it is characterized in that: described imaging mirror is refracting telescope, catoptron or catadioptric mirror.
9, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 1, it is characterized in that: described detector is charge coupled device ccd or complementary metal oxide semiconductor (CMOS) CMOS optoelectronic sensor.
10, the high-resolution optical remote sensing load system based on the Hadamard transform coding according to claim 9, it is characterized in that: described detector is planar array detector or linear array detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200326458U CN201397136Y (en) | 2009-04-16 | 2009-04-16 | High-definition optical remote sensing payload system based on Hadamard transform encoding |
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| CN2009200326458U CN201397136Y (en) | 2009-04-16 | 2009-04-16 | High-definition optical remote sensing payload system based on Hadamard transform encoding |
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| CN201397136Y true CN201397136Y (en) | 2010-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743484A (en) * | 2013-11-22 | 2014-04-23 | 中国科学院光电研究院 | Frequency spectrum coding imaging apparatus |
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2009
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743484A (en) * | 2013-11-22 | 2014-04-23 | 中国科学院光电研究院 | Frequency spectrum coding imaging apparatus |
| CN103743484B (en) * | 2013-11-22 | 2016-03-09 | 中国科学院光电研究院 | A kind of spectrum coding imaging device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20120416 |