CN103674264A - Image fusion device and method based on period diffraction correlated imaging - Google Patents

Abstract

The invention discloses an image fusion device based on periodic diffraction correlation imaging and its method. The image fusion device includes a pseudothermal light source module, a transmission module, a detection module and a post-processing module. The transmission module includes a signal path and a reference Way, the detection module includes a first detector and a second detector. The steps of the method are: the pseudothermal light source module emits a light beam, a part of the light beam is directly received by the second detector through space transmission; the other part of the light beam irradiates the target object, and the transmitted light beam of the target object passes through The transmission is received by the first detector, the output of the second detector and the output of the first detector are sent to the post-processing module, and the post-processing module recovers the picture. The invention has the advantages of simple calculation, low cost, high flexibility and good anti-interference performance.

Description

An image fusion device and method based on periodic diffraction correlation imaging

technical field

The present invention relates to the technical field of correlation imaging, in particular to an image fusion device and method based on periodic diffraction correlation imaging.

Background technique

Imaging is the most basic way for human beings to obtain external information, and it is also the basis for human beings to judge and respond to the external environment. The existing correlative imaging technology is very mature, and can get good results from microscopic imaging to astronomical imaging. In traditional correlative imaging, the pseudothermal light is divided into two beams by a beam splitter, and the two spatially correlated lights travel along different paths, and only one of them is irradiated on the target object to be imaged, and the light passing through the target object Collected with a barrel detector, known as the signal path. The other path of light is collected by a charge-coupled device image sensor (CCD) after propagation, which is called the reference path. Then correlating the light intensity detected by the barrel detector with the light intensity detected by the CCD, the image of the target object can be recovered. In 2008, a novel correlative imaging mechanism was proposed, computational ghost imaging, which does not require the use of a beam splitter but introduces a spatial light modulator (SLM). This mechanism enables the information of the reference path to be obtained through calculation, so the transmission of one path of light can be reduced in the experiment, reducing the complexity of the experiment.

Periodic diffraction correlation imaging is a new correlation imaging mechanism based on periodic diffraction effect. Periodic intensity distribution can be generated through periodic lattice light source. This intensity distribution has point-to-point correlation, so it has the same characteristics as traditional correlation imaging. Physical mechanism, but the realization of this mechanism does not require the use of beam splitters and SLMs, so the complexity and cost of the imaging system can be reduced. This new mechanism has a wide range of applications in image reconstruction and image fusion.

The traditional image fusion technology mainly synthesizes a new image from two or more images through a specific algorithm. The technical system mainly includes: image preprocessing, image fusion algorithm, image fusion evaluation, and fusion results. The calculation of the traditional image fusion algorithm is mainly realized by software algorithm, the calculation is complicated, and it can only fuse multiple images into a new image, and the anti-interference is poor.

Therefore, those skilled in the art are committed to developing an image fusion device and method based on periodic diffraction correlation imaging. Pseudothermal light source is used to realize image fusion by periodic diffraction correlation imaging. The light field strength value of the reference path is directly measured by CCD. Therefore, it does not need to be obtained by calculation, which can reduce the calculation amount of the system, reduce the complexity of the imaging system and the cost of experiments.

Contents of the invention

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an image fusion device and method based on periodic diffraction correlation imaging, which uses a pseudothermal light source to realize image fusion using periodic diffraction correlation imaging, which is simple in calculation and low in cost. Low, high flexibility and good anti-interference.

In order to achieve the above object, the present invention provides an image fusion device based on periodic diffraction correlation imaging, which includes a pseudothermal light source module, a transmission module, a detection module and a post-processing module, and the pseudothermal light source module is arranged at the proximal end; The transmission module includes a target object, a signal path, and a reference path; the detection module is arranged at the far end, and includes a first detector and a second detector; the pseudothermal light source module emits a beam, and a part of the beam is directly transmitted through space. Received by the second detector, the other part illuminates the target object, the transmitted light beam of the target object is received by the first detector after transmission, and the output of the second detector is used as reference information, the The output of the first detector is used as target object information, the output of the second detector and the output of the first detector are sent to the post-processing module, and the post-processing module recovers the image of the target object.

In a preferred embodiment of the present invention, the pseudothermal light source module includes sequentially arranged He-Ne lasers, frosted glass, and periodic array plates, and the continuous wavelength of the He-Ne laser emitted by the laser beam is 632.8nm, so The laser beam passes through the rotating frosted glass to generate pseudothermal light, and the pseudothermal light is output through the periodic array plate to generate the periodic lattice light source required for the experiment.

In another preferred embodiment of the present invention, the periodic array plate is an N×N dot matrix, the interval between adjacent dots is a, and the values of N and a are set to 100 and 50 μm, respectively.

In a preferred embodiment of the present invention, the detection module is a charge-coupled device image sensor (CCD) or a barrel detector (BD).

In another preferred embodiment of the present invention, the rotational speed of the rotating frosted glass is greater than the sampling frequency of the first detector and the second detector.

In a preferred embodiment of the present invention, the post-processing module is used to correlate the measured data to restore the image of the target object, and the first detector records the light field intensity passing through the target object , the second detector records the light field intensity of the reference path, and the post-processing module correlates the light field intensity recorded by the first detector with the light field intensity recorded by the second detector to recover the target image of an object.

In another preferred embodiment of the present invention, the target object includes a first target object and a second target object, the detection module includes a third detector, and a part of the light beam emitted by the pseudothermal light source module passes through the space The transmission is directly received by the second detector; another part of the light beam irradiates the first target object and the second target object, and the transmitted light beams of the first target object and the second target object are transmitted Received by the first detector and the third detector respectively, the output of the second detector and the output of the first detector and the third detector are sent to the post-processing module, The post-processing module restores the images of the first target object and the second target object through correlation calculation.

An image fusion method based on periodic diffraction correlation imaging, comprising the steps of:

(1) A continuous laser beam is emitted by a wavelength He-Ne laser;

(2) The laser beam passes through the rotating frosted glass to generate pseudothermal light;

(3) The generated pseudothermal light is output through an N×N lattice and a periodic array plate with an interval of a between adjacent points to generate the periodic lattice light source required for the experiment;

(4) Part of the beam of the light source is irradiated on the target object, and the light intensity information passing through the target object is recorded by the detector; the other part is directly transmitted in space and received by the detector. The first detector and the second detector The sampling rate of the device is 70 frames per second;

(5) Each rotation of the frosted glass is equivalent to a modulation, and the generated randomly distributed light field is transmitted by the target object, and the intensity of the light field is recorded by the first detector, and the measured value is S _i ; the second detector records The light field intensity of the reference path is I _i (x, y); repeat the above operations and continuously modulate to obtain different light intensity values, and the number of measurements is M;

(6) The measured value obtained by the first detector and the measured value obtained by the second detector are associated with the formula (1) to obtain the image G(x, y) of the target object:

$\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

表示M次测量的平均值，S_i为第一探测器探测的透过目标物体的光场强值。in,

represents the average value of M measurements, and S _i is the light field intensity value detected by the first detector through the target object.

In a preferred embodiment of the present invention, the wavelength of the He-Ne laser is 632.8nm, the diameter of the laser beam is 10cm, the rotation speed of the ground glass is 1000Hz, the N and a values of the periodic array plate were set to 100 and 50 μm, respectively.

In a preferred embodiment of the present invention, an image fusion method based on periodic diffraction correlation imaging has two target objects, and the specific steps are as follows:

(1) A continuous laser beam is emitted by a He-Ne laser with a wavelength of 632.8nm;

(2) The laser beam passes through the frosted glass with a diameter of 10cm and a rotation speed of 1000Hz to generate pseudothermal light;

(3) The generated pseudothermal light is output through the periodic array plate to generate the periodic lattice light source required for the experiment. The values of N and a of the periodic array plate are set to 100 and 50 μm, respectively;

(4) Part of the light beam of the periodic lattice light source is irradiated on the first target object and the second target object, and the light intensity information transmitted through the first target object and the second target object is respectively The first detector and the third detector record; the other part is directly transmitted in space and received by the second detector, and the first detector, the second detector and the third detector The sampling rate of the detector is 70 frames per second;

(5) Each rotation of the frosted glass is equivalent to a modulation, and the generated randomly distributed light field is transmitted through the target object and the target object, and the light field intensity is recorded by the first detector and the third detector, and measured The obtained values are S _i and B _i ; the second detector records the light field intensity of the reference path, which is I _i (x, y); repeat the above operation and continuously modulate to obtain different light field intensities, and the number of measurements is M;

(6) Correlating the light field intensity obtained by the first detector and the third detector with the light field intensity obtained by the second detector using the formula (2) to obtain the first target object and the second target Image G(x, y) of the object:

$\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

表示M次测量的平均值，S_i为所述第一探测器探测的透过所述第一目标物体的光场强值，B_i为所述第三探测器探测的透过所述第二目标物体的光场强值。in,

Indicates the average value of M measurements, S _i is the light field intensity value detected by the first detector and transmitted through the first target object, and _Bi is the light field intensity value detected by the third detector and transmitted through the second target object. The light field strength value of the target object.

The imaging system provided by the present invention uses a pseudothermal light source to realize image fusion by using periodic diffraction correlation imaging. Compared with the prior art, the present invention has the following beneficial effects:

1. The optical field strength value of the reference path is directly measured by the CCD, and does not need to be obtained through calculation, which can reduce the calculation amount of the system.

2. The realization of this technology does not require the use of beam splitters and SLMs, so the complexity and cost of the experimental system can be reduced.

3. The number of sampling can be changed according to the requirements for the definition of the target object, with high flexibility.

4. Good anti-interference performance, can penetrate smoke, ground glass and other scattering media for imaging.

The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

Fig. 1 is a schematic structural diagram of an image fusion device of an image fusion technology based on periodic diffraction correlation imaging of a single target object in a preferred embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an image fusion device for image fusion technology based on periodic diffraction correlation imaging of two target objects according to another preferred embodiment of the present invention.

Detailed ways

Example 1:

As shown in FIG. 1 , there is one target object, and the image fusion device based on periodic diffraction correlation imaging includes a pseudothermal light source module 1 , a transmission module 2 , a detection module 3 and a post-processing module 4 . The transmission module 2 includes a target object 21, a signal path and a reference path. The detection module 3 is arranged at the far end, including a first detector 31 and a second detector 32, wherein the pseudothermal light source module 1 emits a beam, and a part of the beam is directly received by the second detector 32 through space transmission; the other part irradiates the target object 21, the transmitted light beam of the target object 21 is received by the first detector 31 after transmission; the output of the second detector 32 is used as reference information, the output of the first detector 31 is used as the target object information, the output of the second detector 32 and The output of the first detector 31 is sent to the post-processing module 4, and the post-processing module 4 restores the image of the target object 21 through correlation calculation.

The pseudothermal light source module 1 includes a He—Ne laser 11 , a ground glass 12 and a periodic array plate 13 arranged in sequence, as shown in FIG. 1 . The laser wavelength emitted by the He-Ne laser 11 is 632.8nm, which emits a continuous laser beam, which first passes through the rotating frosted glass 12, and its rotational speed is greater than the sampling rate of the first detector 31 and the second detector 32. The laser beam passes through the rotating frosted glass 12 to generate pseudothermal light, which is output through the periodic array plate 13. The periodic array plate 13 is an N×N lattice, and the interval between adjacent points is a, which generates the periodic points required for the experiment. array of light sources. The values of N and a of the periodic array plate are preset according to specific needs, and the values of N and a can be set to 100 and 50 μm respectively.

The detection module 3 is used to record the light field intensity of the signal path and the reference path. Similar products include charge-coupled device image sensors (CCD) and barrel detectors (BD).

The post-processing module 4 is used to perform correlation calculation on the measured data to restore the image of the target object 21 . The first detector 31 records the light field intensity passing through the target object 21 , and the second detector 32 records the light field intensity of the reference path. The image of the target object 21 can be restored by correlating the field strength value recorded by the first detector 31 with the field strength value recorded by the second detector 32 .

This embodiment provides an image fusion method based on periodic diffraction correlation imaging, the signal path includes a target object 21, and a part of the light beam of the periodic lattice light source is irradiated on a target object 21, including the following steps:

(1) emit a continuous laser beam through a He-Ne laser 11 with a wavelength of 632.8nm;

(2) The laser beam passes through the frosted glass 12 with a diameter of 10cm and a rotation speed of 1000Hz to generate pseudothermal light;

(3) The generated pseudothermal light is output through the periodic array plate 13 to generate the periodic lattice light source required for the experiment. The N and a values of the periodic array plate 13 are set to 100 and 50 μm, respectively;

(4) Part of the light beam of the light source is irradiated on the target object 21, and the light intensity information transmitted through the target object 21 is recorded by the first detector 31 respectively; the other part directly propagates in space and is received by the second detector 32. The sampling rate of the detector 31 and the second detector 32 is 70 frames per second;

(5) Every time the frosted glass 12 rotates, it is equivalent to a modulation, and the generated randomly distributed light field is transmitted through the target object 21, and the intensity of the light field is recorded by the first detector 31, and the measured value is S _i ; the second detector 32. Record the light field intensity of the reference path, which is I _i (x, y); repeat the above operations and continuously modulate to obtain different light intensity values, and the number of measurements is M;

(6) The measurement value obtained by the first detector 31 and the measurement value obtained by the second detector 32 are correlated using the formula (1) to obtain the image G(x, y) of the target object 21:

$\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

表示M次测量的平均值，S_i为第一探测器31探测的透过目标物体21的光场强值。in,

represents the average value of M measurements, and S _i is the light field intensity value detected by the first detector 31 and transmitted through the target object 21 .

Example 2:

As shown in Figure 2, the transmission module 2 includes a first target object 21 and a second target object 22, and the number of detectors included in the detector 3 is three, as shown in Figure 2, the image fusion device based on periodic diffraction correlation imaging It includes a pseudothermal light source module 1, a transmission module 2, a detection module 3 and a post-processing module 4. The transmission module 2 includes a signal path and a reference path. The detection module 3 is arranged at the far end and includes a first detector 31, a second detector 32 and a third detector 33, wherein the pseudothermal light source module 1 emits a light beam, and a part of the light beam is directly transmitted by the second detector through space transmission. 32 to receive; the other part illuminates the first target object 21 and the second target object 22, and the transmitted light beams of the two target objects are respectively received by the first detector 31 and the third detector 33 after transmission; the second detector 32 The output of the first detector 31 and the third detector 33 are used as reference information, the output of the first detector 31 and the third detector 33 are used as the first target object information and the second target object information, the output of the second detector 32 and the first detector 31 and the third detector The output of 33 is sent to the post-processing module 4, and the post-processing module 4 restores the images of the first target object 21 and the second target object 22 through correlation calculation.

The pseudothermal light source module 1 includes a He-Ne laser 11 , ground glass 12 and a periodic array plate 13 , as shown in FIG. 2 . The laser wavelength emitted by the He-Ne laser 11 is 632.8nm, which emits a continuous laser beam, which first passes through the rotating frosted glass 12 at a speed greater than the sampling rate of the first detector 31 , the second detector 32 and the third detector 33 . The laser beam passes through the rotating frosted glass 12 to generate pseudothermal light, which is output through the periodic array plate 13. The periodic array plate 13 is an N×N lattice, and the interval between adjacent points is a, which generates the periodic points required for the experiment. array of light sources. The values of N and a of the periodic array plate are preset according to specific needs, and the values of N and a can be set to 100 and 50 μm respectively.

The detection module 3 is used to record the light field intensity of the signal path and the reference path. Similar products include charge-coupled device image sensors (CCD) and barrel detectors (BD).

The post-processing module 4 is used to perform correlation calculation on the measured data to restore the images of the first target object 21 and the second target object 22 . The first detector 31 and the third detector 33 record the light field intensity passing through the target object 21 and the target object 22 , and the second detector 32 records the light field intensity of the reference path. The images of the first target object 21 and the second target object 22 can be recovered by correlating the light field intensity recorded by the first detector 31 and the third detector 33 with the light field intensity recorded by the second detector 32 .

This embodiment provides an image fusion method based on periodic diffraction correlation imaging. The signal path includes two target objects, and a part of the light beam of the periodic lattice light source is irradiated on the two target objects, including the following steps:

(1) emit a continuous laser beam through a He-Ne laser 11 with a wavelength of 632.8nm;

(2) The laser beam passes through the frosted glass 12 with a diameter of 10cm and a rotation speed of 1000Hz to generate pseudothermal light;

(3) The generated pseudothermal light is output through the periodic array plate 13 to generate the periodic lattice light source required for the experiment. The N and a values of the periodic array plate 13 are set to 100 and 50 μm, respectively;

(4) Part of the light beam of the light source is irradiated on the target object, and the light intensity information transmitted through the first target object 21 and the second target object 22 is recorded by the first detector 31 and the third detector 33 respectively; Medium propagation, received by the second detector 32, the sampling rate of the first detector 31, the third detector 33 and the second detector 32 is 70 frames per second;

(5) Every time the frosted glass 12 rotates, it is equivalent to a modulation, and the generated randomly distributed light field is transmitted by the first target object 21 and the second target object 22, and then the light field is recorded by the first detector 31 and the third detector 33 Intensity, the measured values are S _i and B _i ; the second detector 32 records the light field intensity of the reference path, which is I _i (x, y); repeat the above operations and continuously perform modulation to obtain different light intensity values , the number of measurements is M;

(6) Correlating the measured values obtained by the first detector 31 and the third detector 33 with the measured values obtained by the second detector 32 using the formula (2) to obtain the image G(x, y) of the target object;

$\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

表示M次测量的平均值，S_i为第一探测器31探测的透过第一目标物体21的光场强值，B_i为第三探测器33探测的透过第二目标物体22的光场强值。in,

Represents the average value of M measurements, S _i is the light field intensity value detected by the first detector 31 and passed through the first target object 21, and _Bi is the light passed through the second target object 22 detected by the third detector 33 field strength value.

In summary, the correlative imaging device and method based on periodic diffraction correlative imaging provided by the present invention has the characteristics of simplicity, convenience, low cost, small amount of calculation and good anti-interference, and can well restore the image of the target object. .

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (10)

1. An image fusion device based on periodical diffraction correlation imaging, comprising a pseudothermal light source module (1), a transmission module (2), a detection module (3) and a post-processing module (4), characterized in that the pseudothermal The thermal light source module (1) is arranged at the near end; the transmission module (2) includes a target object, a signal path and a reference path; the detection module (3) is arranged at a far end, including a first detector (31) and a second Two detectors (32); the pseudothermal light source module (1) emits a light beam, a part of the light beam is directly received by the second detector (32) through space transmission, and the other part irradiates the target object, through The light beam of the target object is received by the first detector (31) after transmission; the output of the second detector (32) is used as reference information, and the output of the first detector (31) is used as the target The object information, the output of the second detector (32) and the output of the first detector (31) are sent to the post-processing module (4), and the post-processing module (4) calculates The image of the target object is recovered. 2. The image fusion device based on periodic diffraction correlation imaging according to claim 1, wherein the pseudothermal light source module (1) includes He-Ne lasers (11), ground glass (12) and periodic array plates arranged in sequence (13), the He-Ne laser (11) emits a continuous laser beam with a wavelength of 632.8nm, the laser beam passes through the rotating ground glass (12) to generate pseudothermal light, and the pseudothermal light passes through the periodic array plate (13) Output to generate the periodic lattice light source required for the experiment. 3. The image fusion device based on periodic diffraction correlation imaging according to claim 2, wherein the periodic array plate (13) is an N×N lattice, the interval between adjacent points is a, and the N is set to is set at 100, and the value of a is set at 50 μm. 4. The image fusion device based on periodic diffraction correlation imaging according to claim 2, wherein the detection module (3) is a charge-coupled device image sensor (CCD) or a barrel detector (BD). 5. The image fusion device based on periodic diffraction correlation imaging according to claim 2, wherein the rotation speed of the rotating frosted glass (12) is greater than the sampling rate of the first detector (31) and the second detector (32) frequency. 6. The image fusion device based on periodic diffraction correlation imaging according to claim 1, wherein the post-processing module (4) is used to perform correlation calculation on the measured data to restore the image of the target object, so The first detector (31) records the light field intensity passing through the target object (21), the second detector (32) records the light field intensity of the reference path, and the post-processing module (4 ) correlating and calculating the light field intensity recorded by the first detector (31) and the light field intensity recorded by the second detector (32), to recover the image of the target object. 7. The image fusion device based on periodic diffraction correlation imaging according to claim 1, wherein the target object includes a first target object (21) and a second target object (22), and the detection module (3 ) includes a third detector (33), part of the light beam emitted by the pseudothermal light source module (1) is directly received by the second detector (32) through space transmission; another part of the light beam irradiates the first The target object (21) and the second target object (22), the light beams passing through the first target object (21) and the second target object (22) are respectively transmitted by the first detector ( 31) and the third detector (33), the output of the second detector (32) and the output of the first detector (31) and the third detector (33) are sent to the The post-processing module (4), the post-processing module (4) restores the images of the first target object (21) and the second target object (22) through correlation calculation. 8. An image fusion method based on the image fusion device based on periodic diffraction correlation imaging according to any one of claims 2 to 6, characterized in that it comprises the following steps: Step 1: emit a continuous laser beam through a He-Ne laser (11); Step 2: passing the laser beam through the rotating ground glass (12) to generate pseudothermal light; Step 3: output the generated pseudothermal light through a periodic array plate (13) with an N×N lattice and an interval of a between adjacent points to generate a periodic lattice light source required for the experiment; Step 4: Make a part of the light beam of the periodic lattice light source irradiate the target object, record the light field intensity by the first detector (31), and the measured value is S _i ; the other part directly propagates in space, The light field intensity of the reference path is recorded by the second detector (32), which is I _i (x, y), wherein, each rotation of the frosted glass (12) is equivalent to one modulation; repeating the above operation, continuously Modulate, record a plurality of different light field intensities, and the number of measurements is M; Step 5: Correlating the light field intensity obtained by the first detector (31) with the light field intensity obtained by the second detector (32) using formula (1) to obtain the image of the target object (21) G(x,y): $\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$ in,

represents the average value of M measurements, and S _i is the light field intensity detected by the first detector (31) passing through the target object. 9. The image fusion method of the image fusion device based on periodic diffraction correlation imaging according to claim 8, wherein the wavelength of the He-Ne laser (11) is 632.8nm, and the diameter of the laser beam is 10cm, The rotational speed of the frosted glass (12) is 1000 Hz, and the values of N and a of the periodic array plate (13) are set to 100 and 50 μm, respectively. 10. An image fusion method based on the image fusion device based on periodic diffraction correlation imaging according to claim 7, characterized in that it comprises the following steps: Step 1: emit a continuous laser beam through a He-Ne laser (11) with a wavelength of 632.8nm; Step 2: Make the laser beam pass through the frosted glass (12) with a diameter of 10cm and a rotation speed of 1000Hz to generate pseudothermal light; Step 3: Make the generated pseudothermal light output through the periodic array plate (13) to generate the periodic lattice light source required for the experiment, and set the N and a values of the periodic array plate (13) to 100 and 50 μm, respectively; Step 4: Make a part of the light beam of the periodic point matrix light source shine on the first target object (21) and the second target object (22), pass through the target object (21) and the target object ( 22) After transmission, the light field intensity is recorded respectively by the first detector (31) and the third detector (33), and the measured values are S _i and B _i ; the other part directly propagates in space, and is obtained by The second detector (32) records the light field intensity of the reference path, which is I _i (x, y); wherein, each rotation of the frosted glass (12) is equivalent to one modulation; repeating the above operations, the modulation is continuously performed , record multiple different light field intensities, and the number of measurements is M; Step 6: Correlating the light field intensity obtained by the first detector (31) and the third detector (33) with the light field intensity obtained by the second detector (32) using formula (2), Obtain the image G(x, y) of the first target object (21) and the second target object (22): $\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$ in,

Indicates the average value of M measurements, S _i is the light field intensity value detected by the first detector (31) passing through the first target object (21), and Bi _is the value of the light field intensity detected by the third detector (33) ) detects the intensity of the light field passing through said second target (22) object.

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