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Object size measurement method based on depth image processing

A depth image and measurement method technology, applied in image data processing, measurement devices, image enhancement, etc., can solve the problems of reducing logistics process speed, high labor intensity, and long time consumption, so as to improve speed and accuracy and realize automation Effect

Inactive Publication Date: 2019-03-15
SHANGHAI UNIV
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Problems solved by technology

[0002] With the rapid development of the logistics industry, the flow of parcels is increasing. In order to increase the automation of the logistics industry, it is necessary to measure the size of the parcels to realize the automation of billing according to the parcel size and the deployment of express delivery vehicles. At present, manual inspection is still the most common method. The package size measurement method has problems such as low detection efficiency, high labor costs, and low measurement accuracy for irregular objects, and the traditional manual measurement method is not only labor-intensive and time-consuming, but also requires manual input into the system. Greatly reduces the speed of the entire logistics process

Method used

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  • Object size measurement method based on depth image processing
  • Object size measurement method based on depth image processing
  • Object size measurement method based on depth image processing

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Embodiment Construction

[0060] figure 1 It is a schematic diagram of depth camera installation. The depth camera is installed directly above the stage, and the object to be measured is placed on the stage for measurement.

[0061] figure 2 It is a schematic flow chart of an object size measurement method based on depth image processing, including the following steps:

[0062] (1) Designate the region of interest on the stage, and take the image of the region of interest collected by the depth camera when the stage is empty as the reference image, such as image 3 As shown, when the depth camera is used for the first time, it is necessary to manually specify the region of interest. In the subsequent image processing, only the image in the region of interest is processed, which can effectively avoid environmental interference, thereby reducing the complexity of the algorithm; On the object stage, use the depth camera to collect the depth image of the object, and make a difference between the gray va...

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Abstract

The invention belongs to the field of object size measurement, in particular to an object size measurement method based on depth image processing, comprising the following steps: (1) collecting and determining a reference image, collecting a depth image of the object by using a depth camera, and calculating a gray difference value between the depth image and the reference image to obtain a difference value map; (2) constructing Otsu algorithm model, binarizing the difference map to obtain binary image; (3) using edge detection method to detect the edge of the binary image and determine the contour of the object; (4) calculating the smallest rectangle for determining the contour of the object; (5) the height of the object is obtained by using the minimum rectangle of the object contour andthe distance difference between the reference image and the camera; (6) The length and width of the object are calculated by using the principle of small hole imaging. The invention can realize the automation of the size measurement of the object, and effectively improves the speed and accuracy of the size measurement of the object.

Description

technical field [0001] The invention belongs to the field of object size measurement, in particular to an object size measurement method based on depth image processing. Background technique [0002] With the rapid development of the logistics industry, the flow of parcels is increasing. In order to increase the automation of the logistics industry, it is necessary to measure the size of the parcels to realize the automation of billing according to the parcel size and the deployment of express delivery vehicles. At present, manual inspection is still the most common method. The package size measurement method has problems such as low detection efficiency, high labor costs, and low measurement accuracy for irregular objects, and the traditional manual measurement method is not only labor-intensive and time-consuming, but also requires manual input into the system. Greatly reduced the speed of the entire logistics process. Contents of the invention [0003] In order to solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/60G06T7/64G06T7/13G06T7/136G01B11/00
CPCG01B11/00G06T7/60G06T2207/10028G06T7/13G06T7/136G06T7/64
Inventor 杨毅孙健李小毛彭艳罗均
Owner SHANGHAI UNIV
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