Data processing device and data processing method

Patent metadata

Field	Value
Publication number	US-2024264310-A1
Application number	US-202418614789-A
Country	US
Kind code	A1
Filing date	Mar 25, 2024
Priority date	Oct 13, 2021
Publication date	Aug 8, 2024
Grant date	—

Abstract

A data processing device includes: a storage device storing measurement data, including position information and velocity information about multiple measurement points in a space; and a processing circuit. The processing circuit acquires the measurement data from the storage device, recognizes measurement points on a stationary object from among the multiple measurement points on the basis of the velocity information, and generates point cloud data including the position information about the measurement points on a stationary object on the basis of a result of the recognition.

First claim

What is claimed is:

1 . A data processing device comprising:
a storage device storing measurement data, including position information and velocity information about a plurality of measurement points in a space; and a processing circuit, wherein the processing circuit acquires the measurement data from the storage device, recognizes measurement points on a stationary object from among the plurality of measurement points on a basis of the velocity information, and generates point cloud data, including the position information about the measurement points on a stationary object, on a basis of a result of the recognition.

2 . The data processing device according to claim 1 , wherein
the storage device stores the measurement data for each of a plurality of frames, and the measurement data for each frame includes the position information and the velocity information about the plurality of measurement points in a space.

3 . The data processing device according to claim 1 , wherein
the velocity information about the plurality of measurement points in the measurement data includes first velocity information and second velocity information acquired by measuring at different measurement angles, and the processing circuit recognizes the measurement points on a stationary object on a basis of the first velocity information and the second velocity information.

4 . The data processing device according to claim 1 , wherein the processing circuit generates the point cloud data by excluding, from the measurement data, information pertaining to measurement points other than the recognized measurement points on a stationary object.

5 . The data processing device according to claim 1 , wherein the processing circuit generates the point cloud data by recognizing measurement points on a moving object from among the plurality of measurement points on a basis of the velocity information and using other measurement data as a basis for filling in information about points that were unmeasured due to the presence of the moving object.

6 . The data processing device according to claim 5 , wherein the processing circuit assigns a flag to the measurement points on a moving object and generates the point cloud data using measurement data acquired by remeasuring the flagged measurement points.

7 . The data processing device according to claim 1 , wherein the processing circuit generates the point cloud data through processing in which, from among the plurality of measurement points in the measurement data, the recognized measurement points on a stationary object are assigned a flag indicating a stationary object, or through processing in which, from among the plurality of measurement points in the measurement data, measurement points excluding the recognized measurement points on a stationary object are assigned a flag indicating a moving object.

8 . The data processing device according to claim 1 , wherein
the position information about the plurality of measurement points in the measurement data includes three-dimensional coordinate values for each of the plurality of measurement points, and the point cloud data is three-dimensional point cloud data including the three-dimensional coordinate values for each of the measurement points on a stationary object.

9 . The data processing device according to claim 1 , wherein, in the measurement data, the number of measurement points with the velocity information is the same as the number of measurement points with the position information.

10 . The data processing device according to claim 1 , wherein the measurement data is sensor data outputted from a sensor using a frequency-modulated continuous wave (FMCW), or data generated on a basis of the sensor data.

11 . The data processing device according to claim 10 , wherein
the velocity information about the plurality of measurement points includes information indicating a velocity component of the relative velocity of each of the plurality of measurement points with respect to the sensor, the velocity component being the component in the direction along a straight line connecting the sensor and each of the plurality of measurement points, and the processing circuit recognizes, from among the plurality of measurement points, measurement points for which the magnitude of the velocity component is less than or equal to a threshold value as the measurement points on a stationary object.

12 . The data processing device according to claim 10 , wherein
the velocity information about the plurality of measurement points includes a flag indicating whether or not a velocity component of the relative velocity of each of the plurality of measurement points with respect to the sensor is greater than a threshold value, the velocity component being the component in the direction along a straight line connecting the sensor and each of the plurality of measurement points, and the processing circuit recognizes the measurement points on a stationary object from among the plurality of measurement points on a basis of the flag.

13 . The data processing device according to claim 10 , wherein the processing circuit
matches the point cloud data with map data of an environment sensed by the sensor to thereby determine whether the map data needs to be updated, and if updating is necessary, updates the map data on a basis of the point cloud data.

14 . The data processing device according to claim 10 , wherein the processing circuit
acquires map data of an environment sensed by the sensor, and matches the point cloud data with the map data to thereby estimate the position and/or orientation of the sensor.

15 . The data processing device according to claim 10 , wherein, after recognizing a measurement point on a moving object from among the plurality of measurement points, the processing circuit causes the sensor to measure the measurement point on a moving object.

16 . A system comprising:
the data processing device according to claim 1 ; and a sensor that generates the measurement data or data for generating the measurement data.

17 . The system according to claim 16 , wherein the sensor is a LiDAR sensor of the FMCW method.

18 . The system according to claim 16 , wherein the sensor is a radar.

19 . A data processing method to be executed by a computer, the data processing method comprising:
acquiring measurement data, including position information and velocity information about a plurality of measurement points in a space; recognizing measurement points on a stationary object from among the plurality of measurement points on a basis of the velocity information; and generating point cloud data, including the position information about the measurement points on a stationary object, on a basis of a result of the recognition.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Hisada Kazuya
• Kato Yumiko
• Kikuchi Kohei
• Inada Yasuhisa

Classifications

• G01S13/536

  using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves · CPC title

• G01S13/58

  Velocity or trajectory determination systems; Sense-of-movement determination systems · CPC title

• G01S13/931

  of land vehicles · CPC title

• G01S17/42

  Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) · CPC title

• G01S13/89

  for mapping or imaging · CPC title