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A distance measurement method and system for a pulse sequence

A pulse sequence and distance measurement technology, applied in the field of information processing, can solve problems such as inability to record high-speed moving objects, video not conducive to algorithm implementation, and inability to provide signal input.

Active Publication Date: 2020-11-17
SPIKE VISION (BEIJING) TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, since there is no human visual persistence effect in the computer system, this sampling method is limited by the sampling frequency, cannot give a continuous signal input, and cannot record high-speed moving objects
Therefore, the video obtained by this sampling method is not conducive to the implementation of the algorithm, and is not the best input

Method used

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  • A distance measurement method and system for a pulse sequence
  • A distance measurement method and system for a pulse sequence
  • A distance measurement method and system for a pulse sequence

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Experimental program
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Effect test

Embodiment 1

[0042] The light intensity information corresponding to the pulse sequence is obtained by calculating the reciprocal of the weighted average value of the time difference. At this time, the light intensity information can be expressed as:

[0043]

[0044] where the θ T1 is the corresponding light intensity, n is the number of pulse signals in the pulse sequence Δt n is the time interval between the nth pulse signal and the n-1th signal, the ω n is the weight corresponding to the nth pulse signal, wherein the weight can be determined according to the intensity of the generated pulse signal, and φ is a parameter for adjusting the light intensity.

Embodiment 2

[0046] The light intensity information corresponding to the pulse sequence is obtained by calculating the logarithm of the time difference. At this time, the light intensity information can be expressed as:

[0047] θ T2 =φ·log(t n -t n-1 )

[0048] where the θ T2 is the corresponding light intensity, the φ is a parameter to adjust the light intensity, and the t n is the occurrence time of the nth pulse signal. The advantage of this processing method is that the logarithmic value can be constrained between 0 and 1 by selecting the corresponding base, which is convenient for analysis and utilization.

Embodiment 3

[0050] The light intensity information corresponding to the pulse sequence is obtained by exponentiating the time difference. At this time, the light intensity information can be expressed as:

[0051]

[0052] where the θ T2 is the corresponding light intensity, the φ is a parameter to adjust the light intensity, and the t n is the occurrence time of the nth pulse signal.

[0053] In a specific implementation manner, obtaining the distance measure of two pulse sequences from the light intensity information obtained by combining one or more of the above embodiments also includes one of the following embodiments.

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Abstract

The invention discloses a pulse sequence distance measuring method and system. The pulse sequence distance measuring method comprises the steps that a time difference value between each adjacent two pulse signals in pulse sequences is calculated; light intensity information corresponding to the pulse sequences is obtained according to the time difference value; the distance between the pulse sequences is measured according to the difference of the light intensity information between the pulse sequences; the pulse sequence distance measuring system comprises a pulse sensor array and a processor; and the processor specifically comprises a light intensity calculation module and a pulse sequence calculation module. According to the pulse sequence distance measuring method and system, two pulsesequences are converted into corresponding light intensity changes by analyzing a generation manner of pulse sequence signals obtained by the pulse sequence sensor, and thus the distance between thetwo pulse sequences is accurately estimated; and the pulse sequence distance measuring method and system is further applied to the design of detection, tracking, and compression algorithms and provides the basis for the subsequent analysis and coding of pulse array signals.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a distance measurement method and system for pulse sequences. Background technique [0002] Traditional image sensors take frames as units, sample scenes at a certain frequency and output video. This sampling method utilizes the persistence of vision principle of the human nervous system, and can form continuous videos in the human visual system. At present, artificial intelligence based on machine learning algorithms is developing rapidly, and has achieved rapid development in many fields, such as video surveillance, automatic driving, intelligent security, military applications, etc. In fact, since there is no human visual persistence effect in the computer system, this sampling method is limited by the sampling frequency, cannot give a continuous signal input, and cannot record high-speed moving objects. Therefore, the video obtained by this sampling method is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/16G01J11/00
Inventor 田永鸿朱林李家宁付溢华董思维黄铁军王耀威
Owner SPIKE VISION (BEIJING) TECHNOLOGY CO LTD