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Scene change detection in size measurer

A technology of scene change and size, which is applied in the direction of instruments, measuring devices, and photo interpretation, etc., and can solve the problems of slight slippage of sensor time, collision and displacement, etc.

Active Publication Date: 2021-06-15
HAND HELD PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sensors on wires or poles may slip slightly over time or may be accidentally displaced by bumps

Method used

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  • Scene change detection in size measurer
  • Scene change detection in size measurer
  • Scene change detection in size measurer

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Experimental program
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Embodiment Construction

[0023] Embodiments consistent with the present invention include several methods and apparatus for detecting dimensional misalignment based on the movement of components of the system relative to other components of the system.

[0024] For the purpose of this document, the term "mixture of Gaussian distributions" refers to the method of background modeling. You can use a single-channel grayscale image, an RGB image, or a depth image (the depth image contains the observed Z value at each pixel location). Each pixel location has one or more associated Gaussian (normal) probability distributions (Gaussian distributions) based on the observed intensities. Blends multiple Gaussian distributions together to form a joint distribution. Gaussian distributions can be dynamic; new Gaussian distributions can be added, or Gaussian distributions can be merged, or the mean (μ) and standard deviation (σ) can be changed.

[0025] The term "support point" refers to a three-dimensional (XYZ) po...

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Abstract

A package size measurer is disclosed. Changes in the pose of the package sizer are detected by background modeling the area of ​​the measurement platform, and then determining whether multiple points in the scene are at different distances from the background model. Pose changes can also be detected by comparing the counts of support points in the 3D container generated from images taken during training with the counts of support points in subsequent images and determining how many support points differ.

Description

technical field [0001] The present invention relates to dimensioner devices that use image processing to measure the physical dimensions of objects. More specifically, a method and apparatus are provided for determining whether a scene has changed indicating corresponding movement between a camera and a measurement platform. Background technique [0002] Use the fixed position package measurer to measure the X, Y and Z dimensions of objects such as packages. To provide accuracy, such sizers assume a static relationship between the camera and the plane on which an object such as a package is placed. Once this relationship is established, translation or rotation of the camera will generally result in under / overestimation of the parcel size. Similarly, a reference plane (eg, a scale or platform) against which a sizer measures a package typically cannot be moved without introducing error. In other words, the sensor and reference plane should not move relative to each other af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/04
CPCG01C11/04G01B21/042G01B11/00G01B11/02G01B11/2513G07B17/00661G07B2017/00685G06T7/50G06T7/001G06T2207/30108
Inventor R.A.罗伊德S.麦克克罗斯基
Owner HAND HELD PRODS