A two-dimensional phase-sensitive demodulation method and device
A technology of phase-sensitive demodulation and image demodulation module, which is applied in the field of two-dimensional phase-sensitive demodulation method and device, which can solve the problems of long time-consuming detection and achieve the effects of reducing time-consuming detection, suppressing noise, and improving signal-to-noise ratio
Inactive Publication Date: 2021-03-23
BEIJING INFORMATION SCI & TECH UNIV
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[0004] Although the light intensity time domain modulation method can be used to modulate and demodulate the light wave parameters to achieve the purpose of improving the signal-to-noise ratio, but the signal or image needs to be collected multiple times, and the detection takes a long time
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[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] In order to facilitate the understanding of the embodiments of the present invention, further explanations will be made below with specific embodiments in conjunction with the accompanying drawings, and the embodiments are not intended to limit the embodiments of the present invention.
[0041] The technical solution provided by the em...
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The invention relates to a two-dimensional phase-sensitive demodulation method and device. The two-dimensional phase-sensitive demodulation method comprises the following steps of obtaining a two-dimensional amplitude modulation gray scale image, and a two-dimensional reference signal, wherein the two-dimensional amplitude modulation gray scale image includes a two-dimensional carrier signal and atwo-dimensional modulation signal; determining the two-dimensional amplitude modulation gray scale image, and the two-dimensional reference signal as two paths of input of a preset multiplier; inputting the two-dimensional amplitude modulation gray scale image and the two-dimensional reference signal into the preset multiplier to obtain an intermediate result; determining the intermediate resultas the input of a preset low pass filter; and inputting the intermediate result into the preset low pass filter, and demodulating the two-dimensional amplitude modulated gray scale image.
Description
technical field [0001] Embodiments of the present invention relate to the field of computer technology, and in particular to a two-dimensional phase-sensitive demodulation method and device. Background technique [0002] Photoelectric detection technology is a technology to detect and identify objects based on the characteristics of the radiated, reflected, and scattered light waves of the detected object. It is widely used in underwater target detection, naval photoelectric detection, space targets, and material property detection. [0003] In the actual application of photoelectric detection technology, due to the low signal-to-noise in some environments, the imaging quality of ordinary imaging methods is poor, and even the target object in the image cannot be distinguished. ) to modulate and demodulate is an effective method to improve the signal-to-noise ratio. At present, the light intensity time-domain modulation method is the most widely used method in photoelectric d...
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IPC IPC(8): G01D3/036
CPCG01D3/036
Inventor 刘国忠刘懿郝思忠田玉琳
Owner BEIJING INFORMATION SCI & TECH UNIV