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Fusion method for terahertz image and visible light image

A fusion method and visible light technology, which is applied in the field of fusion of terahertz images and visible light images, can solve problems such as difficulty in meeting actual engineering needs and fusion of image target contour information, and achieve clear display, comprehensive details, and good effects

Inactive Publication Date: 2018-11-20
XIAN TIANHE DEFENCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These problems will lead to the inability to directly fuse information between image target contours. At the same time, due to the differences and limitations of terahertz and visible light images, it is difficult to meet the actual needs of engineering only by relying on a single type of image.

Method used

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  • Fusion method for terahertz image and visible light image
  • Fusion method for terahertz image and visible light image
  • Fusion method for terahertz image and visible light image

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Embodiment 1

[0032] Such as figure 1 As shown, the fusion method of a terahertz image and a visible light image according to the present invention includes the following steps:

[0033] 1) Set the centers of the targets formed by the terahertz image acquisition device and the visible light image acquisition device to coincide; use the terahertz image information to ensure the integrity of the terahertz image information, the effectiveness of image fusion, and obtain a complete detected body area;

[0034] 2) photographing the detected object through the terahertz image acquisition device and the visible light image acquisition device respectively, and obtaining the terahertz image and the visible light image of the detected object;

[0035] 3) Perform image preprocessing on the above-mentioned terahertz image and visible light image respectively; the image preprocessing methods include denoising, filtering and binarization processing; since the terahertz image is acquired in a passive way...

Embodiment 2

[0042] On the basis of Embodiment 1, due to the different installation conditions of the terahertz and visible light image acquisition devices, the optical paths passed by the two sensors are different, and the field of view of the lens is different, there will be a relative difference between the terahertz image and the visible light image. The problems of translation, rotation, inconsistent imaging area size, and different resolution size make it impossible to directly fuse the two images. Image registration must be performed to transform the two images into the same coordinate system. Such as figure 2Shown, X in the figure c , Y c ,Z c Form the coordinate system of the image acquisition device, point C is the optical center of the image acquisition device, Z c The axis is the optical axis of the image acquisition device, the plane perpendicular to the optical axis is the imaging plane of the image acquisition device, x, y are the imaging plane coordinate system, the int...

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Abstract

The invention discloses a fusion method for a terahertz image and a visible light image, and belongs to the field of multi-spectral image fusion. The fusion method is characterized by comprising the steps of superposing the centers of targets formed by a terahertz image acquisition device and a visible light image acquisition device; shooting a detected object to obtain the terahertz image and thevisible light image of the detected object, and carrying out image preprocessing; performing image registration operation on the preprocessed terahertz image and visible light image, extracting imagefeatures, and performing geometric correction on the visible light image; and carrying out fusion according to a result of the registration operation, thereby obtaining a complete target area of thedetected object. The terahertz image acquisition device and the visible light image acquisition device shoot the detected object to carry out image information acquisition, so that the fused image isricher in information and more comprehensive in detail. The image fusion effect is good; the information of the visible light image and the terahertz image is integrated, so that a target scenery canbe displayed more comprehensively and clearly; and the method can be applied to numerous fields of security protection and the like.

Description

technical field [0001] The invention belongs to the field of multispectral image fusion, and in particular relates to a fusion method of a terahertz image and a visible light image. Background technique [0002] The fusion of terahertz images and visible light images belongs to the category of multi-spectral image fusion. The characteristics of images formed by reflection or transmission of electromagnetic waves in different bands are different, and the target information provided is different. Using this complementary information, we can realize the detection of each state of the target. Clearer display. Terahertz radiation refers to electromagnetic radiation with an oscillation frequency around 1012 Hz (1 THz = 1012 GHz). The electromagnetic wave in this frequency band is just between millimeter wave and infrared, so the spectrum field is called far infrared ray (FIR-far infrared); it is millimeter wave (MMW) or submillimeter wave (SMMW) in the field of electronics. Gene...

Claims

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Application Information

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IPC IPC(8): G06T5/50G06T5/00
CPCG06T5/50G06T2207/20221G06T2207/10036G06T5/80
Inventor 张凯歌龚亚樵赵广州李世龙王虎
Owner XIAN TIANHE DEFENCE TECH
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