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CN113333329A - Cigarette defect detection system based on deep learning - Google Patents

Cigarette defect detection system based on deep learning Download PDF

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CN113333329A
CN113333329A CN202110293538.6A CN202110293538A CN113333329A CN 113333329 A CN113333329 A CN 113333329A CN 202110293538 A CN202110293538 A CN 202110293538A CN 113333329 A CN113333329 A CN 113333329A
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cigarette
image
detection
deep learning
training
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舒炜
区剑平
王永才
张真
高铁功
陈伟
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Nanjing Chuangzhi Caicai Technology Co ltd
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Nanjing Chuangzhi Caicai Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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    • B07C5/3422Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/02Measures preceding sorting, e.g. arranging articles in a stream orientating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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    • G06COMPUTING; CALCULATING OR COUNTING
    • G06NCOMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N3/00Computing arrangements based on biological models
    • G06N3/02Neural networks
    • G06N3/04Architecture, e.g. interconnection topology
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06NCOMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
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Abstract

A cigarette defect detection system based on deep learning comprises a computer, a light source, an optical fiber sensor, a camera, an industrial personal computer and an alarm removing device, wherein a control panel controls the light source to flash and simultaneously send a photographing signal to the camera after judging that a cigarette is in place, the camera collects a cigarette image and transmits the image to the computer, the cigarette image is detected through deep learning detection software installed in the computer, and the image is converted into digital information in a matrix form and is put into a deep learning network for detection and judgment; the detection result comprises the number of cigarettes and whether the cigarettes are empty or not, the detection result is transmitted to the industrial personal computer in a serial port mode, and the industrial personal computer drives the alarm removing device to perform corresponding cigarette removing actions.

Description

Cigarette defect detection system based on deep learning
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of tobacco processing detection, in particular to a cigarette defect detection system based on deep learning.
[ background of the invention ]
The tobacco industry has higher requirements on product defect detection, and mainly comprises cigarette missing detection and missing detection, wherein the missing detection detects whether the tobacco of each cigarette is filled with the whole roll paper and whether the end part of the roll paper is empty; the missing cigarette detection detects whether the number of cigarettes in each box meets a preset number; once detection is missed or a large number of false detections occur, great influence is generated on the production efficiency and the brand reputation of the product; in some dangerous working environments which are not suitable for manual operation or occasions which are difficult for manual vision to meet the requirements, machine vision is commonly used to replace the manual vision; meanwhile, in the process of mass industrial production, the efficiency of checking the product quality by using manual vision is low and the precision is not high; in addition, the complex imaging environment of the visual product makes the traditional image detection product difficult to meet the detection requirements, and the setting of various detection frames and fixed thresholds also makes the traditional image product complex to use and poor in precision.
In the traditional cigarette detection, a plurality of small ROI detection frames are marked on an image, preprocessing and detection are carried out in a fixed area, and when a cigarette shakes up and down, left and right and back and forth, the detection is very inaccurate; moreover, because the traditional image processing detection method mainly sets a threshold value for detection through the white pixel ratio and the mean value and the variance of the pixels after the binary segmentation, once the position is greatly changed, the situation that only half of cigarette ends are included may occur, and then a great difference is generated between the position and the preset pixel threshold value, thereby causing false detection; common false detection comprises that the ROI position is unchanged, the cigarette position changes, and the number of white pixels in a detection frame is too large, so that the false detection is carried out to form an empty head; if impurities exist and the color of the impurities is bright, the impurities are mistakenly judged as empty heads when being divided by a fixed threshold value; when the degree and the angle of the cigarette are different, the cigarette ends are different in area due to the fact that the degree and the angle are different, so that the mean value and the variance of the pixels after binarization can change greatly and easily exceed a fixed threshold value, and the cigarette is judged to be empty.
Therefore, the problem to be solved in the field is urgently needed to provide a cigarette defect detection system with high precision and high efficiency.
[ summary of the invention ]
Aiming at the problems, the invention provides a cigarette defect detection system based on deep learning, which comprises a computer, a light source, an optical fiber sensor, a camera, an industrial personal computer and an alarm removing device, wherein a control panel controls the light source to flash and simultaneously sends a photographing signal to the camera after judging that a cigarette is in place, the image of the cigarette is collected by the camera and is transmitted to the computer, the image of the cigarette is detected by deep learning detection software installed in the computer, and the image is converted into digital information in a matrix form and is put into a deep learning network for detection and judgment; the detection result comprises the number of cigarettes and whether the cigarettes are empty, the detection result is transmitted to the industrial personal computer through serial ports and other forms, and the industrial personal computer drives the alarm removing device to execute corresponding cigarette removing actions.
Furthermore, the light source adopts the LED light source to adopt stroboscopic and diffuse reflection mode to carry out even illumination to the cigarette.
Further, the industrial personal computer carries an Intel Celeron J1900 quad-core 2.0GHz processor, an 8G memory and a 1T solid state disk, and adopts stm32 as a control core.
A cigarette defect detection system based on deep learning comprises the following training and detection processes:
the method comprises the following steps: collecting training images, and marking the images as positive samples and negative samples;
step two: performing preprocessing on images participating in training, including changing sizes and enhancing data;
step three: dividing the collected positive and negative sample images into a training set and a verification set;
step four: setting a hyper-parameter of a network, training an image by adopting a convolutional neural network, adjusting the hyper-parameter to train the image for multiple times, and selecting a model with the highest precision from models obtained by multiple times of training through verification set observation precision, recall rate and the like;
step five: and carrying out the same pretreatment on the image to be detected, and then carrying out a trained convolutional neural network model to finally obtain a classification result.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, iterative training is carried out through a large amount of image data, so that a convolutional neural network is formed, not only can the pixel proportion information of the picture be extracted, but also deep texture information and edge information can be obtained, and the detection accuracy is improved through multi-information comprehensive analysis.
2. The invention adopts the transfer learning method to train, so that the training speed is faster, the precision is higher, the training time is saved, and the requirement of industrial detection real-time training is met.
3. The deep learning detection technology adopted by the invention is the most advanced detection technology in the machine vision industry at present, is different from the traditional detection method in that a plurality of detection frames are required to be arranged, the system can realize the full-information detection of all images without drawing the detection frames, has high speed and high precision, and can be matched with various existing medium-speed and high-speed cigarette machines.
[ description of the drawings ]
Fig. 1 is a schematic diagram of the hardware architecture of the present invention.
Fig. 2 is a training and detection flow diagram of the present invention.
FIG. 3 is a schematic diagram of a convolutional neural network of the present invention.
[ detailed description ] embodiments
The directional terms of the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are only used to explain and illustrate the present invention, but not to limit the scope of the present invention.
The invention relates to a cigarette defect detection system based on deep learning, which is based on a convolutional neural network model and mainly comprises three parts, wherein an industrial camera is used for acquiring a front image of a cigarette, then cigarette image information is used as a matrix to be input, the deep learning network model is trained through a large number of images and judges whether the cigarette is missing or empty, and finally the empty cigarette is removed according to a judgment result.
The convolutional neural network is the core of the system, extracts image information, not only extracts surface information such as image brightness and edges, but also utilizes each pixel information of the image; the convolutional neural network comprises a forward propagation process and a backward propagation process, namely a neural network model closest to real judgment is obtained by continuously updating the weight and the bias of the convolutional neural network through iteration of extracting a large amount of image information, and judgment close to a real value is obtained after an image to be detected passes through a trained network.
Referring to fig. 1, hardware of the cigarette defect detection system based on deep learning of the invention comprises a computer, a light source, an optical fiber sensor, a camera, an industrial personal computer and an alarm removing device, wherein the light source adopts an LED light source and a stroboscopic working mode, and can blink when triggered, so that energy consumption is reduced, the cigarettes are uniformly illuminated in a diffuse reflection mode, corner shadows and random light reflection problems are thoroughly eliminated, the occurrence of detection dead angles is avoided, and an effective image basis is established for comprehensive detection; the industrial personal computer carries an Intel Celeron J1900 quad-core 2.0GHz processor, an 8G memory and a 1T solid state disk, and the control board adopts stm32 as a control core.
The working principle is as follows:
the processor in the control panel judges that the cigarette is in place according to the optical fiber sensor, controls the light source to flash and simultaneously sends a photographing signal to the camera, acquires a cigarette image through the camera, transmits the image to the computer, detects the cigarette image through depth learning detection software installed in the computer, converts the image into digital information in a matrix form, and puts the digital information into a depth learning network trained in advance for detection and judgment; the detection result comprises information such as the number (whether the cigarettes lack) of the cigarettes and whether the cigarettes are empty, so that an accurate automatic identification function is realized, the result is finally transmitted to the industrial personal computer through serial ports and the like, and the industrial personal computer drives the alarm removing device to perform corresponding cigarette removing actions.
Referring to fig. 2, the training and detection process of the cigarette defect detection system based on deep learning of the present invention is as follows:
the method comprises the following steps: firstly, acquiring a training image, and marking the image as a positive sample and a negative sample, wherein the positive sample is 3000, and the negative sample is 500;
step two: performing preprocessing on images participating in training, including changing sizes and enhancing data;
step three: dividing the collected positive and negative sample images into a training set and a verification set, wherein the training set is used for training, and the verification set is used for verifying the precision;
step four: setting hyper-parameters (including learning rate, training round number and the like) of a network, training images by adopting a convolutional neural network, adjusting the hyper-parameters to train the images for multiple times, and selecting a model with the highest precision from models obtained by multiple times of training through verification set observation precision, recall rate and the like;
step five: and carrying out the same pretreatment on the image to be detected, and then carrying out a trained convolutional neural network model to finally obtain a classification result.
The algorithm core of the cigarette defect detection system based on deep learning is a convolutional neural network, which comprises an input layer, a convolutional layer, an activation function, a pooling layer and a full-connection layer, wherein the convolutional layer, the pooling layer and the full-connection layer jointly form a hidden layer;
the input layer is used for processing multi-dimensional data including color image information, is input to the whole neural network, and represents a pixel matrix of a picture in the convolutional neural network for processing the image; as shown in fig. 3, the leftmost three-dimensional matrix can represent a picture, wherein the length and width of the three-dimensional matrix represent the size of the image, the depth of the three-dimensional matrix represents the color channel of the image, the depth of the black and white picture is 1, and the depth of the image is 3 in the RGB color mode; starting from an input layer, the convolution neural network converts the three-dimensional matrix of the previous layer into the three-dimensional matrix of the next layer through different neural network structures until the last full-connection layer.
The convolutional layer is the most important part of a convolutional neural network, the input of each node in the convolutional layer is only a small block of the neural network of the previous layer, the common size of the small block is 3 x 3, and the convolutional layer analyzes each small block in the neural network more deeply so as to obtain features with higher abstraction degree.
The pooling layer can reduce the size of the matrix without changing the depth of the three-dimensional matrix, a picture with higher resolution is converted into a picture with lower resolution by pooling operation, and the number of nodes in the final full-connection layer can be further reduced through the pooling layer, so that the aim of reducing parameters in the whole neural network is fulfilled.
The full-connection layer is used for giving a classification result, after image information is processed by the convolution layer and the pooling layer for several times, the image information is abstracted into a characteristic with higher information content, and then a classification task is completed through full connection.
The cigarette loose end detection method is the same as the traditional detection method in that a fixed ROI is also set for shearing, but a large amount of training data can generate different position conditions, a deep learning network model learns more image information, the deep learning network model does not detect the cigarette loose end through single threshold comparison, but carries out iterative training through a large amount of image data, so that a convolutional neural network is formed, and the convolutional neural network comprises a plurality of weights and bias values; the trained images comprise the changes of the distance and the direction of one or more than one image, deep learning training can extract pixel proportion information of the images and can also obtain deep texture information and edge information, and the detection accuracy is improved through multi-information comprehensive analysis; in addition, in order to improve the deep learning training speed, the invention adopts a transfer learning method for training, the transfer learning allows processing scenes by borrowing the label data of some existing related tasks, and stores the knowledge obtained when the related tasks are solved, so that the training speed is higher, the training time is saved, and the requirement of industrial detection real-time training is met.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. A cigarette defect detection system based on deep learning is characterized by comprising a computer, a light source, an optical fiber sensor, a camera, an industrial personal computer and an alarm removing device, wherein a control panel controls the light source to flash and simultaneously sends a photographing signal to the camera after judging that a cigarette is in place, the image of the cigarette is collected through the camera and is transmitted to the computer, the cigarette image is detected through deep learning detection software installed in the computer, and the image is converted into digital information in a matrix form and is input into a deep learning network for detection and judgment; the detection result comprises the number of cigarettes and whether the cigarettes are empty, the detection result is transmitted to the industrial personal computer in a serial port mode, and the industrial personal computer drives the alarm removing device to execute corresponding cigarette removing actions.
2. The cigarette defect detection system based on deep learning of claim 1, wherein the light source is an LED light source, and the cigarettes are uniformly illuminated in a stroboscopic and diffuse reflection manner.
3. The cigarette defect detection system based on deep learning of claim 1, characterized in that the industrial personal computer carries an IntelCeleron J1900 quad-core 2.0GHz processor, an 8G memory, and a 1T solid state disk, and adopts stm32 as a control core.
4. The utility model provides a cigarette defect detecting system based on degree of depth study which characterized in that, cigarette defect detecting system's based on degree of depth study training and detection flow includes following step:
the method comprises the following steps: collecting training images, and marking the images as positive samples and negative samples;
step two: performing preprocessing on images participating in training, including changing sizes and enhancing data;
step three: dividing the collected positive and negative sample images into a training set and a verification set;
step four: setting a hyper-parameter of a network, training an image by adopting a convolutional neural network, adjusting the hyper-parameter to train the image for multiple times, and selecting a model with the highest precision from models obtained by multiple times of training through verification set observation precision, recall rate and the like;
step five: and carrying out the same pretreatment on the image to be detected, and then carrying out a trained convolutional neural network model to finally obtain a classification result.
CN202110293538.6A 2021-08-04 2021-08-04 Cigarette defect detection system based on deep learning Pending CN113333329A (en)

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Cited By (2)

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CN114155676A (en) * 2021-11-29 2022-03-08 山东中烟工业有限责任公司 Logistics system damaged wood pallet detection alarm system and working method thereof
CN114577816A (en) * 2022-01-18 2022-06-03 广州超音速自动化科技股份有限公司 Hydrogen fuel bipolar plate detection method

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CN114155676A (en) * 2021-11-29 2022-03-08 山东中烟工业有限责任公司 Logistics system damaged wood pallet detection alarm system and working method thereof
CN114577816A (en) * 2022-01-18 2022-06-03 广州超音速自动化科技股份有限公司 Hydrogen fuel bipolar plate detection method

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