Method and device for detecting height line of stacked grain

A detection method and detection device technology, which are applied in image data processing, instruments, calculations, etc., can solve the problem of no stacking grain height line detection, etc.

Active Publication Date: 2018-01-16
AEROSPACE INFORMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective means to detect the height line of grain piles by combining the color space model and shape

Method used

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  • Method and device for detecting height line of stacked grain
  • Method and device for detecting height line of stacked grain
  • Method and device for detecting height line of stacked grain

Examples

Experimental program
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Effect test

Embodiment 1

[0066] In the embodiment of the present invention, by modeling the color space where the pile height line is located, and using an edge detection algorithm to find the upper and lower edges of the pile height line, the position of the pile height line can be accurately detected.

[0067] In the embodiment of the present invention, a camera is installed on the top of the wall opposite to the height line of the pile to be detected, and the camera preferably adopts a telecentric lens with less distortion. The schematic diagram of a camera provided in this embodiment for taking pictures of a wall where a grain height line is set is as follows: figure 1 As shown, when the camera is installed, the grain height line is as horizontal as possible in the image, and the optical axis of the camera is as perpendicular as possible to the wall surface of the grain height line to be detected, so that the camera can capture as few other walls as possible.

[0068] The processing flow of a method fo...

Embodiment 2

[0097] This embodiment provides a device for detecting the height line of piles, and its specific structure is as follows Figure 4 As shown, including the following modules:

[0098] The training sample set construction module 41 is used to collect training images of the grain height line through a camera, and form a training sample set based on the training images;

[0099] The Gaussian mixture model construction module 42 is used to extract the color space features of each pixel in each training image in the training sample set, use the color space features of all pixels as training data, and train the above training data with the EM algorithm to obtain one GMM, denoted as model Θ. The trained GMM represents the distribution of pixel color space features.

[0100] The probability image acquisition module 43 is configured to calculate the posterior probability value of the color space feature of each pixel in the image to be inspected relative to the Gaussian mixture model to obt...

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Abstract

The invention provides a method and a device for detecting the height line of stacked grain. The method includes: collecting the training images of the height line of the stacked grain by the camera, forming a training sample set based on the training images; extracting the color space features of each pixel in each training image in the training sample set, and using the EM algorithm to train all the color space features Obtain the mixed Gaussian model; calculate the posterior probability value of the color space feature of each pixel in the image to be inspected relative to the mixed Gaussian model to obtain the probability image; according to the probability image and the grayscale image of the image to be inspected, obtain the heap by Hough transform The candidate set on the grain height line and the lower edge; the position of the grain height line in the image to be checked is obtained from the pairing of the candidate set on the edge on the grain height line and the candidate set on the lower edge. The invention combines the color space modeling and the Hough transform algorithm to fuse the color information and shape information of the height line of the grain pile, thereby improving the position detection accuracy of the height line of the grain pile.

Description

Technical field [0001] The invention relates to the field of intelligent grain storage management, in particular to a method and device for detecting the height line of piled grain. Background technique [0002] The automation level of grain storage management still needs to be improved. The height measurement of piled grain and the recording of grain in and out of warehouse information are all done manually, which hinders the development of grain logistics organization. The grain height line, also known as the grain storage line, is an important reference mark line for the measurement and control of the grain height, and the detection of grain in and out of the warehouse. The detection of its position plays an important role in the intelligent monitoring and supervision of the granary. [0003] The pile height line has a specific color and shape, generally a fixed-width dark red strip painted horizontally on the wall. However, in the granary environment, the lights are dim and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/90
Inventor 胡懋地李其均
Owner AEROSPACE INFORMATION
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