阅读说明：本技术 一种单片烟叶三视图像的获取装置及方法 (Device and method for acquiring three-view image of single tobacco leaf ) 是由 王艺斌 刘承钧 李亚勇 于 2019-08-12 设计创作，主要内容包括：本发明公开了一种单片烟叶三视图像的获取装置及方法,采用纵向通道输送方法输送烟叶,并配合巧妙设置的图像采集设备和正面、背面光源,能够采集烟叶的三视图像——即正视、背视、透视图像。其中透视图像能够获得烟叶的脉相信息：主脉直径、主脉和支脉的夹角,再结合两视图像,从而能够准确对烟叶部位分组及烟叶等级分组进行判别,即使是在烟叶卷曲的情况下也能够实现判别。本发明烟叶自上而下输送,结构简单、能耗低、占地面积小、成本低廉,有利于大规模应用。本发明不仅适用于烟叶检测,还适用于其他农作物叶片,或片状物体的三视图像获取及检测。(The invention discloses a device and a method for acquiring three-view images of single tobacco leaves. Wherein the perspective image can obtain the pulse phase information of the tobacco leaf: the diameter of the main vein, the included angle of the main vein and the branch vein are combined with the two-view image, so that the tobacco leaf part grouping and the tobacco leaf grade grouping can be accurately judged, and the judgment can be realized even under the condition that the tobacco leaves are curled. The tobacco leaf conveying device has the advantages of conveying tobacco leaves from top to bottom, being simple in structure, low in energy consumption, small in occupied area and low in cost, and being beneficial to large-scale application. The invention is not only suitable for detecting tobacco leaves, but also suitable for acquiring and detecting three-view images of other crop leaves or sheet-shaped objects.)

1. The device for acquiring the three-view image of the single tobacco leaf is characterized in that: the device comprises a channel which is longitudinally arranged, wherein the channel main body is provided with a flat section, a first group of image acquisition equipment and a second group of image acquisition equipment are respectively arranged on two sides of the channel, and the first group of image acquisition equipment and the second group of image acquisition equipment are arranged on different sides of the channel in a vertically staggered manner; the first group of image acquisition equipment is provided with a first group of positive surface light sources on the same side as the group of image acquisition equipment, and the first group of image acquisition equipment is used for acquiring an image of one side of the tobacco leaf; a second group of positive surface light sources which are arranged at the same side of the second group of image acquisition equipment are arranged at the second group of image acquisition equipment, and the second group of image acquisition equipment is used for acquiring an image of the other side of the tobacco leaf; further comprising:

the third group of image acquisition equipment is provided with a back light source, and the back light source is arranged on the opposite side of the channel of the image acquisition equipment;

or

The system comprises at least one group of back light sources, wherein the back light sources are arranged at the first group of image acquisition equipment and/or the second group of image acquisition equipment, and the back light sources are arranged on the opposite sides of a channel of the image acquisition equipment.

2. The device for acquiring the three-view image of the single tobacco leaf according to claim 1, wherein: the channel cross-sectional aspect ratio is greater than or equal to 5: 1.

3. The device for acquiring the three-view image of the single tobacco leaf according to claim 1, wherein: the pipeline is longitudinally arranged, and the channel is positioned inside the pipeline;

or

The conveying mechanism comprises two groups of oppositely arranged conveying mechanisms, and the channel consists of two groups of oppositely arranged conveying mechanisms.

4. The device for acquiring the three-view image of the single tobacco leaf according to claim 3, wherein: the conveying mechanism comprises two groups of belt conveying mechanisms which are oppositely arranged at the upper part and roller conveying mechanisms which are oppositely arranged at the lower part.

5. The device for acquiring the three-view image of the single tobacco leaf according to claim 4, wherein: when the pipeline is arranged, the shooting direction of each image acquisition device is perpendicular to the wall of the pipeline, and when the conveying mechanism is arranged, the shooting direction of each image acquisition device is perpendicular to the belt.

6. The device for acquiring the three-view image of the single tobacco leaf according to claim 1, wherein: the pipeline is vertically arranged or obliquely arranged, and the pipeline is straight or has a radian.

7. The device for acquiring the three-view image of the single tobacco leaf according to claim 1, wherein: the longitudinal pipeline further comprises at least one of the following devices: steel sheet, slide rail, pulley, air generating equipment, conveyor belt, conveying roller.

8. The device for acquiring the three-view image of the single tobacco leaf according to claim 1, wherein: each group of front surface light sources comprises two light sources which are uniformly distributed on two sides of the image acquisition equipment; or each group of front light sources comprises a combined light source.

9. The method for acquiring the three-view image of the single tobacco leaf is characterized by comprising the following steps of:

firstly, feeding single tobacco leaves into the top of a longitudinal channel, and enabling the tobacco leaves to fall in the channel;

step two, acquiring three-view images of tobacco leaves

When a first group of image acquisition equipment arranged on one side of the channel and a front light source thereof work simultaneously, acquiring one surface image of the tobacco leaves passing through an area acquired by the group of image acquisition equipment;

and when the second group of image acquisition equipment arranged on the other side of the channel and the front surface light source thereof work simultaneously, acquiring the image of the other side of the tobacco leaves passing through the area acquired by the group of image acquisition equipment.

And when the third group of image acquisition equipment arranged on one side of the channel and the back light source thereof work simultaneously, acquiring perspective images of the tobacco leaves passing through the area acquired by the group of image acquisition equipment.

10. The method for acquiring the three-view image of the single tobacco leaf is characterized by comprising the following steps of:

firstly, feeding single tobacco leaves into the top of a longitudinal channel, and enabling the tobacco leaves to fall in the channel;

step two, acquiring three-view images of tobacco leaves

When the image acquisition equipment arranged on one side of the long edge of the channel and the front surface light source thereof work simultaneously, acquiring one surface image of the tobacco leaves passing through the area acquired by the group of image acquisition equipment; when the group of image acquisition equipment is provided with a back light source and the group of image acquisition equipment and the back light source thereof work simultaneously, acquiring a perspective image of the tobacco leaf;

when the other group of image acquisition equipment arranged on the other side of the long edge of the channel and the front surface light source thereof work simultaneously, acquiring the other surface image of the tobacco leaves passing through the area acquired by the group of image acquisition equipment; when the group of image acquisition equipment is provided with a back light source and the group of image acquisition equipment and the back light source thereof work simultaneously, acquiring a perspective image of the tobacco leaf;

in the second step, when a group of image acquisition devices is provided with a back light source, the work of the group of image acquisition devices and the front light source thereof, and the work of the group of image acquisition devices and the back light source thereof are carried out in a time-sharing manner.

Technical Field

The invention belongs to the technical field of tobacco leaf processing, and relates to a device and a method for acquiring a three-view image of a single tobacco leaf.

Background

Currently, in the process of grade judgment of tobacco leaves, two-view images are often adopted as a judgment basis. Two-view images, namely a front view image and a rear view image. In the existing two-view image acquisition, a belt conveyor conveying method is often adopted to acquire two-view images of tobacco leaves, or a suspension conveying method is adopted to acquire two-view images of tobacco leaves. The color of the tobacco leaves can be well judged according to the two views, but the grouping judgment of the tobacco leaf parts is difficult, and particularly, the grouping judgment of the curled tobacco leaf parts cannot be realized.

Disclosure of Invention

In order to solve the problems, the invention discloses a device and a method for acquiring three-view images of single tobacco leaves.

In order to achieve the purpose, the invention provides the following technical scheme:

a device for acquiring three-view images of single tobacco leaves comprises a channel which is longitudinally arranged, wherein the channel is provided with a flat section, a first group of image acquisition equipment and a second group of image acquisition equipment are respectively arranged on two sides of the channel, and the first group of image acquisition equipment and the second group of image acquisition equipment are arranged on different sides of the channel in a vertically staggered manner; the first group of image acquisition equipment is provided with a first group of positive surface light sources on the same side as the group of image acquisition equipment, and the first group of image acquisition equipment is used for acquiring an image of one side of the tobacco leaf; a second group of positive surface light sources which are arranged at the same side of the second group of image acquisition equipment are arranged at the second group of image acquisition equipment, and the second group of image acquisition equipment is used for acquiring an image of the other side of the tobacco leaf; further comprising:

the third group of image acquisition equipment is provided with a back light source, and the back light source is arranged on the opposite side of the channel of the image acquisition equipment;

or

The system comprises at least one group of back light sources, wherein the back light sources are arranged at the first group of image acquisition equipment and/or the second group of image acquisition equipment, and the back light sources are arranged on the opposite sides of a channel of the image acquisition equipment.

Further, the channel cross-sectional aspect ratio is greater than or equal to 5: 1.

Furthermore, the device also comprises a pipeline which is longitudinally arranged, and the channel is positioned inside the pipeline;

or

The conveying mechanism comprises two groups of oppositely arranged conveying mechanisms, and the channel consists of two groups of oppositely arranged conveying mechanisms.

Furthermore, the conveying mechanism comprises two groups of belt conveying mechanisms which are arranged on the upper portion in an opposite mode, and roller conveying mechanisms which are arranged on the lower portion in an opposite mode.

Further, when the pipeline is arranged, the shooting direction of each image acquisition device is perpendicular to the wall of the pipeline, and when the conveying mechanism is arranged, the shooting direction of each image acquisition device is perpendicular to the belt.

Further, the pipeline is vertically arranged or obliquely arranged, and the pipeline is straight or has a radian.

Further, the pipeline also comprises at least one of the following devices: steel sheet, slide rail, pulley, air generating equipment, conveyor belt, conveying roller.

Furthermore, each group of front surface light sources comprises two light sources which are uniformly distributed on two sides of the image acquisition equipment; or each group of front light sources comprises a combined light source.

The invention provides a method for acquiring a three-view image of a single tobacco leaf, which comprises the following steps:

firstly, feeding single tobacco leaves into the top of a longitudinal channel, and enabling the tobacco leaves to fall in the channel;

step two, acquiring three-view images of tobacco leaves

When a first group of image acquisition equipment arranged on one side of the channel and a front light source thereof work simultaneously, acquiring one surface image of the tobacco leaves passing through an area acquired by the group of image acquisition equipment;

and when the second group of image acquisition equipment arranged on the other side of the channel and the front surface light source thereof work simultaneously, acquiring the image of the other side of the tobacco leaves passing through the area acquired by the group of image acquisition equipment.

And when the third group of image acquisition equipment arranged on one side of the channel and the back light source thereof work simultaneously, acquiring perspective images of the tobacco leaves passing through the area acquired by the group of image acquisition equipment.

A method for acquiring a three-view image of a single tobacco leaf comprises the following steps:

firstly, feeding single tobacco leaves into the top of a longitudinal channel, and enabling the tobacco leaves to fall in the channel;

step two, acquiring three-view images of tobacco leaves

When the image acquisition equipment arranged on one side of the long edge of the channel and the front surface light source thereof work simultaneously, acquiring one surface image of the tobacco leaves passing through the area acquired by the group of image acquisition equipment; when the group of image acquisition equipment is provided with a back light source and the group of image acquisition equipment and the back light source thereof work simultaneously, acquiring a perspective image of the tobacco leaf;

when the other group of image acquisition equipment arranged on the other side of the long edge of the channel and the front surface light source thereof work simultaneously, acquiring the other surface image of the tobacco leaves passing through the area acquired by the group of image acquisition equipment; when the group of image acquisition equipment is provided with a back light source and the group of image acquisition equipment and the back light source thereof work simultaneously, acquiring a perspective image of the tobacco leaf;

in the second step, when a group of image acquisition devices is provided with a back light source, the work of the group of image acquisition devices and the front light source thereof, and the work of the group of image acquisition devices and the back light source thereof are carried out in a time-sharing manner.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the technical scheme provided by the invention can rapidly acquire the three-view image of the tobacco leaf, wherein the perspective image can acquire the pulse phase information of the tobacco leaf: the diameter of the main vein, the included angle of the main vein and the branch vein are combined with the two-view image, so that the tobacco leaf part grouping and grade grouping can be accurately judged, and even under the condition that the tobacco leaves are curled, the judgment can be accurately carried out.

2. The tobacco leaf conveying device has the advantages of conveying tobacco leaves from top to bottom, being simple in structure, low in energy consumption, small in occupied area and low in cost, and being beneficial to large-scale application.

3. The invention can accurately correspond the three-view images to the single tobacco leaves one by one.

4. The device and the method provided by the invention are not only suitable for tobacco leaf detection, but also suitable for three-view image acquisition of other crop leaves or sheet-shaped objects in the whole process link of tobacco leaf detection, so that the device and the method are widely applied to other process flows which need to detect the sheet-shaped objects (the sheet-shaped objects which can be used for acquiring perspective views through illumination of a back light source, and are usually thin and light-permeable) according to images.

Drawings

Fig. 1 is a schematic structural view of an apparatus for obtaining a three-view image of a single tobacco leaf according to an embodiment.

Fig. 2 is a schematic position diagram of the pipeline and the image capturing device in a top view state according to the first, third, and fourth embodiments.

Fig. 3 is a schematic structural view of an acquisition device for three-view images of single tobacco leaves provided in the second embodiment.

Fig. 4 is a schematic position diagram of the pipeline and the image capturing device in a top view state according to the second embodiment.

Fig. 5 is a schematic structural view of an apparatus for obtaining a three-view image of a single tobacco leaf according to a third embodiment.

Fig. 6 is a schematic structural view of an apparatus for obtaining a three-view image of a single tobacco leaf according to a third embodiment.

Description of reference numerals:

the tobacco leaf conveying device comprises a pipeline 1, tobacco leaves 2, a light source 3-A, a first group of image acquisition devices 4, a light source 5-B, a light source 6-C, a light source 7-D, a second group of image acquisition devices 8, a light source 9-E, a light source 10-F, a third group of image acquisition devices 11-F1, a light source 13-a shell body 14-a frame 15, a belt conveying mechanism 16-a roller conveying mechanism.

Detailed Description

The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.