Building relative distance estimation method based on near-infrared tri-spectral imaging

A near-infrared imaging and relative distance technology, which is applied in the field of image visual distance estimation, can solve the problems of unstable sensor signals, inability to image and estimate distance, and error in estimation results, so as to broaden the band range, improve accuracy, and overcome large errors Effect

CN113625293AInactive Publication Date: 2021-11-09南京信息工程大学滨江学院
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Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-11-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a building relative distance estimation method based on near-infrared tri-spectral imaging. The method comprises the following steps: firstly, measuring the spectrum of sunlight in a foggy day and selecting three near-infrared bands from the spectrum; then, using the same near-infrared camera and the optical filters corresponding to the three near-infrared imaging wavebands for imaging the selected building target in the foggy weather to obtain three near-infrared images imaged in different wavebands in the same scene; respectively determining global atmospheric light values and extinction coefficients of the three near-infrared images; deducing a building relative distance estimation formula according to the three near-infrared images and the corresponding global atmospheric light values and extinction coefficients; and finally, estimating the relative distance of the building by using the derived distance estimation formula. According to the invention, the influence of the reflectivity of the material under different wave bands on distance estimation in the prior art is overcome, so that the estimation of the relative distance of the building is more accurate.
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Description

technical field

[0001] The invention belongs to the technical field of image visual distance estimation, and in particular relates to a method for estimating relative distances of buildings based on near-infrared three-spectrum imaging. Background technique

[0002] Distance perception technology is widely used in national defense and civilian fields, such as automatic barriers based on distance measurement technology, unmanned driving, and robotic arm grabbing targets. Currently, there are two main types of distance perception based on the type of light source. The first is a distance perception method based on active light, such as a method based on triangulation ranging and time-of-flight (ToF). This distance perception method based on active light needs to provide a light source as a signal source, and is susceptible to interference from external conditions such as noise. , has certain requirements on the surface material of the measured target, and its performance is p...

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Embodiment Construction

[0069] The present invention is described in further detail now in conjunction with accompanying drawing.

[0070] It should be noted that terms such as "upper", "lower", "left", "right", "front", and "rear" quoted in the invention are only for clarity of description, not for Limiting the practicable scope of the present invention, and the change or adjustment of the relative relationship shall also be regarded as the practicable scope of the present invention without substantive changes in the technical content.

[0071] As shown in the accompanying drawings, an embodiment of the present invention provides a method for estimating the relative distance of buildings based on near-infrared three-spectrum imaging;

[0072] Specifically, it is realized through the following steps:

[0073] Step 1: Measure the spectrum of sunlight under fog using a standard white target and a spectrometer.

[0074] Specifically, it is realized through the following steps:

[0075] Step 101, sele...