Method and device for suppressing shot noise of aerial squint long-distance imaging remote sensing image

A shot noise and remote sensing image technology, applied in the field of aerial remote sensing imaging, can solve problems such as noise and large shot particles, and achieve the effect of improving the signal-to-noise ratio, reducing the impact of shot noise, and increasing the limit distance

Active Publication Date: 2021-06-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Embodiments of the present invention provide a method and device for suppressing shot noise in aerial strabismus long-distance imaging remote sensing images, so as to at least solve the technical problem of a large amount of shot noise in existing aerial remote sensing equipment during long-distance imaging

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  • Method and device for suppressing shot noise of aerial squint long-distance imaging remote sensing image

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Embodiment 1

[0034] According to an embodiment of the present invention, there is provided a method for suppressing shot noise in aerial squint remote imaging remote sensing images, see figure 1 , including the following steps:

[0035] S101: taking multiple pictures of the same target on the ground through the method of multiple exposures in the frame, and obtaining multiple frames of images of the same target;

[0036] S102: Perform time-domain averaging processing on multiple frames of images to reduce image shot noise.

[0037] In the embodiment of the present invention, the method for suppressing the shot noise of aerial strabismus long-distance imaging remote sensing images is to obtain multiple frames of images of the same target by taking multiple pictures of the same target on the ground through the method of multiple exposures in the frame, and to obtain multiple frames of images of the same target, and to obtain multiple frames of images of the same target. Time-domain average ...

Embodiment 2

[0057] According to another embodiment of the present invention, a device for suppressing shot noise in aerial squint remote imaging remote sensing images is provided, see figure 2 ,include:

[0058] The intra-frame image averaging processing unit is used to take multiple pictures of the same target on the ground through the method of multiple exposures in the frame to obtain multiple frames of images of the same target;

[0059] The image target area extraction processing unit is used to perform time-domain average processing on multiple frames of images to reduce image shot noise.

[0060] In the embodiment of the present invention, the device for suppressing the shot noise of aerial strabismus long-distance imaging remote sensing images takes multiple pictures of the same target on the ground through the method of multiple exposures in the frame to obtain multiple frames of images of the same target, and the multi-frame Time-domain average processing of the image reduces ...

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Abstract

The invention relates to the field of aerial remote sensing imaging, in particular to a method and a device for suppressing shot noise of an aerial squint long-distance imaging remote sensing image. According to the method and the device, the same target on the ground is photographed for multiple times through an intra-frame multiple exposure method, multiple frames of images of the same target are obtained, time domain average processing is performed on the multiple frames of images to reduce shot noise of the images, the shot noise influence of the images can be effectively reduced, and the signal-to-noise ratio of the images is improved; meanwhile, the contradiction between the small pixel size and the large full-well electron number demand in the model selection of the aviation squint remote sensing image detector is solved, the limit distance of imaging detection can be effectively increased, and the detection of a smaller target background reflectivity difference target is realized.

Description

technical field [0001] The invention belongs to the field of aerial remote sensing imaging, and relates to a method and a device for suppressing shot noise of aerial squint long-distance imaging remote sensing images, and is particularly aimed at suppressing atmospherically excited shot noise by aerial camera squint long-distance imaging. Background technique [0002] When aerial remote sensing equipment performs long-distance imaging, it is affected by the radiation of the atmospheric path, and the signal-to-noise ratio of the image is relatively poor, especially when the imaging distance is more than 30km, the influence of the atmosphere is more significant. The noise source of aerial remote sensing equipment is mainly shot noise, when the number of electrons received by the photodetector is μ e When , the excited shot noise is Fits a Poisson distribution. In the long-distance aerial squint imaging, there is very obvious atmospheric path radiation. The analysis results ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/217H04N5/232H04N5/357
CPCH04N23/81H04N23/66H04N23/695H04N25/60
Inventor 李军修吉宏张洪文黄浦李昕阳
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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