Adaptive heterogeneous variable-resolution ghost imaging method and system
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A resolution and ghost imaging technology, applied in the field of adaptive heterogeneous resolution ghost imaging methods and systems, can solve problems such as small resolution, slow imaging speed, and inability to adjust, so as to improve ghost imaging efficiency and reduce data volume Effect
Active Publication Date: 2020-09-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0005] In order to solve the problem of slow imaging speed caused by small objects of interest in a large field of view and fixed resolution that cannot be adjusted in the practical application of traditional ghost imaging, an adaptive heterogeneous variable resolution ghost imaging disclosed in the present invention The technical problem to be solved by the method and system is: perform image processing according to the first ghost imaging results, use prior knowledge, detect the circular area where the target object is located through image processing, and generate the position and size by determining the position of the center of the circular area Corresponding non-uniform speckle with adjustable resolution, project the non-uniform speckle to the target for secondary imaging, by dividing the classic speckle in polar coordinates, reorganizing and filling the pixels of the random matrix The generation of non-uniform speckle, that is, adaptively adjust the position of the high-resolution center point according to the actual situation, perform high-resolution speckle imaging on the sensing area area, and perform low-resolution speckle imaging on the non-sensing area area, reducing the data volume, thereby improving ghost imaging efficiency
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Embodiment 1
[0049] Such as image 3 , as shown in 4, 5, and 6, this embodiment discloses an adaptive heterogeneous variable resolution ghost imaging method, and the specific implementation steps are as follows:
[0051] The ghost imaging parameters for initial configuration include high-resolution area radius r0, resolution 126*126, maximum discrete angle P=60, and maximum discrete ring number Q=40.
[0052] Step 2: Load the initial non-uniform annular speckle through the digital micromirror array device 4 according to the initialization parameters, project it onto the target object through the tube diode laser 1, and the speckle light intensity signal received by the single-point detector 6 corresponds to the corresponding target 10 The light intensity signal reflected by the object is associated with the calculation to realize the image reconstruction, and complete the first speckle projection, ghost imaging sa...
Embodiment 2
[0068] Such as figure 1 As shown, this embodiment also discloses an adaptive heterogeneous variable-resolution ghost imaging system, which is used to realize the above-mentioned adaptive heterogeneous variable-resolution ghost imaging method, and the channel includes a laser 1, a collimator Beam mirror group 2, data processing module 3, digital micromirror array device 4, coinciding operator 5, single point detector 6, receiving lens 7, receiving beam 8, reflector 9, target 10, half mirror 11, transmitting Light beam 12, half mirror 13, relay lens 14.
[0069] The data processing module 3 includes a speckle generation submodule, an image processing submodule and a coincidence operator 5 . The speckle generation sub-module is used to run the speckle generation algorithm to realize speckle generation. The image processing sub-module is used to realize the image processing in the automatic method in step 3, that is, the image processing algorithm is run through the image p...
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Abstract
The invention discloses an adaptive heterogeneous variable-resolution ghost imaging method and system, and belongs to the technical field of optical imaging. The implementation method comprises the following steps: performing image processing according to the first ghost imaging result; utilizing priori knowledge, detecting a circular area where the target object is located through image processing; determining the position of the circle center of the circular area to generate non-uniform speckles with adjustable resolution corresponding to the position and the size; projecting the non-uniformspeckle to a target to carry out secondary imaging on the target. The generation of non-uniform speckles is realized by carrying out region division, recombination and pixel filling of a random matrix on classical speckles under polar coordinates. That is to say, the position of the high-resolution center point is adaptively adjusted according to actual situation requirements, high-resolution speckle imaging is performed on the induction area, low-resolution speckle imaging is performed on the non-induction area, the data volume is reduced, and the ghost imaging efficiency is further improved. The invention also discloses an adaptive heterogeneous variable-resolution ghost imaging system for realizing the method.
Description
technical field [0001] The invention belongs to the technical field of optical imaging, in particular to an adaptive heterogeneous variable resolution ghost imaging method and system. Background technique [0002] Ghost imaging is a new imaging technology that utilizes the correlation characteristics of light field intensity to restore the information of the scene to be tested. Different from the direct imaging of traditional area array detectors, ghost imaging only uses single-point detectors without spatial resolution, and can reconstruct the target scene information by correlating the fluctuations of the light field and the changes of the total light intensity of the echo. Due to its advantages of high detection efficiency, low noise, low cost, and simple structure, ghost imaging shows great application prospects in the fields of space remote sensing, optical encrypted transmission, and medical imaging. [0003] This method is a system in which the target is imaged indir...
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