CN113283470A - Green vegetable disease classification detection method based on human psychological cognition model - Google Patents

Green vegetable disease classification detection method based on human psychological cognition model Download PDF

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CN113283470A
CN113283470A CN202110405593.XA CN202110405593A CN113283470A CN 113283470 A CN113283470 A CN 113283470A CN 202110405593 A CN202110405593 A CN 202110405593A CN 113283470 A CN113283470 A CN 113283470A
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CN113283470B (en
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赵云波
赵丽丽
花婷婷
苏振岭
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Zhejiang University of Technology ZJUT
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Abstract

A classified detection method of vegetable diseases based on a human psychological cognition model comprises the following steps: step 1: acquiring and processing images, acquiring vegetable sample data of a plurality of disease areas and normal areas, and respectively using the disease area sample x1、x2Drawing a circle for the circle center to find k nearest sample points; step 2: respectively calculating the proportion of the disease samples and the proportion of the normal samples in the nearest k sample points, and making a 2 x 2 list table; and step 3: recalculating sample x using the human relaxed symmetric model in conjunction with the tabulation made in step 21、x2The probability of occurrence of the disease sample in the k nearest neighbor sample points; and 4, step 4: using the result calculated in step 3 as sample xiWeights in the classifier training process; and 5: and repeating the steps to determine the weights of other disease samples and normal samples, and performing final training by using an SVM algorithm. Step 6: and carrying out disease detection on the green vegetables to be detected by using a trained SVM classification detector.

Description

Green vegetable disease classification detection method based on human psychological cognition model
Technical Field
The invention relates to a vegetable disease classification detection method based on a human psychological cognition model, which is considered as systematic error in judgment and decision shared by human beings, and an unreasonable rational mode can make the human beings quickly judge and decide. The method is suitable for the situation that sample data is difficult to monitor and acquire during the identification of the green vegetable diseases.
Background
The green vegetables serving as daily edible vegetables provide various vitamins and mineral substances required by human bodies for human beings, and promote the physical health of the human bodies to a certain extent. The green vegetable is used as a herbaceous plant and is extremely susceptible to different diseases in the growing process. Poor appearance or reduced yield of green vegetables caused by plant diseases and insect pests directly influence the income of vegetable growers who plant vegetables in large areas. In order to avoid and prevent diseases as early as possible, the existing green vegetable disease classification is mainly monitored by a manual identification mode and a camera device, the manual identification is used under the background of large-area green vegetable planting, time and labor are consumed, the fund is consumed, the manual identification can cause careless omission due to fatigue, and the camera device for identifying the diseases and insect pests is arranged in a vegetable field and is easily influenced by natural environments of rain, snow and strong wind or other insects.
In the environment we are in nature, due to cognitive limitations, motivations or adaptation to nature (or the result of natural environment to human training), humans can learn and make appropriate decisions quickly and correctly well from single or unbalanced distribution situations. Therefore, people can quickly capture key features through simple case learning or information exchange. For example, a child can directly learn the characteristics of a lion through a certain lion in a zoo or a picture book, and the lion can be directly identified next time; or the communication habit of 'if A, then B' is passed between people to obtain 'if not B, then not A' information. We generalize the similarity of the cognitive models conforming to the above into "symmetric bias" and "mutually exclusive bias". The loose symmetry model comprises two cognition models of symmetry deviation and mutual exclusion deviation, and is one of human psychological cognition models.
The classifier can be quickly and accurately learned through training of a small number of green vegetable disease data samples through a human psychological cognition model, different weights are assigned to different positive and negative samples of plant diseases and insect pests by the human psychological cognition model in the process, the existing trainer is used for learning samples with different weights to different degrees, the weights of the disease samples in classification are strengthened, the flexibility of determining classification boundaries is finally realized, and the accuracy of the classifier in the green vegetable disease classification detection problem is improved.
The existing classified detection of the vegetable diseases mainly comprises two modes of manual identification and camera device monitoring, and the fatigue of long-time manual identification personnel causes careless omission and simultaneously faces large-area planting area, and a large amount of labor cost is also needed; set up camera device monitoring and receive outdoor natural environment's interference easily, these factors have influenced the income of green vegetable planting family to a certain extent.
Disclosure of Invention
The invention aims to overcome the defects of the existing method and introduces a vegetable disease classification detection method based on a human psychological cognition model.
The method can ensure the flexibility of determining the classification decision surface under the training of the green vegetable disease data set with unbalanced disease samples and normal samples, improves the detection accuracy, provides a method for applying a human psychological cognition model to the training process of the existing algorithm, and provides a new application idea for avoiding the influence of the unbalanced green vegetable disease data samples on the classification result.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a classification detection method for recognizing vegetable diseases by a classifier based on human psychological cognition model improvement comprises the following steps:
step 1: acquiring and processing images to acquire a plurality of vegetable sample data of a diseased area and a normal area, and respectively using a diseased area sample x1、x2Drawing a circle for the circle center to find k nearest sample points;
step 2: respectively calculating the proportion of the disease sample and the normal sample in the nearest k sample points, and making a 2 x 2 list table to represent the sample x1Sample x2The probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points is taken as the probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points;
and step 3: combining the tabulation made in the step 2,recalculating sample x using a loose symmetric model of a person1、x2The probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points is taken as the probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points;
and 4, step 4: using the result calculated in step 3 as sample xiThe larger this value represents the sample x, the weight in the classifier training processiThe higher the accuracy of the decision, the farther away from the decision surface, the higher the weight occupied in the decision;
and 5: and repeating the steps to determine the weights of other disease samples and normal samples, carrying out final training by using an SVM algorithm, and carrying out training learning according to different importance degrees of different samples.
Step 6: and carrying out disease detection on the green vegetables to be detected by using a trained SVM classification detector.
The invention provides a new application idea for preventing and finding the green vegetable diseases as soon as possible by assigning different weights to different green vegetable disease samples by using a human psychological cognition model, helping a classifier to improve classification detection precision under the condition that the green vegetable disease samples are unbalanced and providing a new application idea for preventing and finding the green vegetable diseases as soon as possible.
A person can well quickly grasp key features from single or unbalanced distributed cases to learn correctly and make appropriate decisions. We therefore generalize the model containing "symmetric biases" and "mutually exclusive biases" to a loosely symmetric model, which is one of the human psychocognitive traits. The human psychological cognition model is added into the training process of the green vegetable disease classifier, different weights are given to different samples, the weight of the disease samples in classification is enhanced, the flexibility of determining classification boundaries is realized, and the classification detection precision is improved.
Compared with the prior art, the technical scheme of the invention has the advantages that:
(1) the accuracy of algorithm training can be ensured even if the unbalanced data are concentrated in training
(2) Different samples have different weights in the training process, so that the effect of the key samples in the training process is strengthened
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FIG. 1 is a flow chart of the present invention
Detailed Description
The present invention will be described in further detail with reference to examples in order to facilitate the understanding and practice of the invention by those of ordinary skill in the art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a classification detection method for recognizing vegetable diseases by a classifier based on human psychological cognition model improvement comprises the following steps:
step 1: acquiring and processing images to acquire a plurality of vegetable sample data of a diseased area and a normal area, and respectively using a diseased area sample x1、x2Drawing a circle for the circle center to find k nearest sample points;
step 2: respectively calculating the proportion of the disease sample and the normal sample in the nearest k sample points, and making a 2 x 2 list table to represent the sample x1Sample x2The probability of the disease sample and the probability of the normal sample as the disease sample appearing in the k nearest neighbor sample points are respectively expressed by letters a, b, c and d;
and step 3: using the loose symmetry of the human (LS model) in conjunction with the tabulation made in step 2
Figure BDA0003022179810000041
Recalculate sample xiThe probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points is taken as the probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points;
and 4, step 4: using the value calculated in step 3 as a sample xiWeight in algorithm training process, the larger this value represents sample xiThe higher the accuracy of the decision, the farther away from the decision surface, the higher the weight occupied in the decision;
and 5: and repeating the steps to determine the weights of other disease samples and normal samples, carrying out final training by using an SVM algorithm, and carrying out training learning according to different importance degrees of different samples.
Step 6: and carrying out disease detection on the green vegetables to be detected by using a trained SVM classification detector.
The green vegetable diseases referred to in the present text are referred to in "semantic segmentation and localization of green vegetable disease region image based on deep learning" published in 2020 by jin Lun, Qianlai et al.
The loose symmetry model, symmetry bias, and mutual exclusion bias of the human referred to herein are described in the section "A machine learning model with human cognitive discs capable of learning from small and useful databases", 2017, by Hidetaka Taniguchi, Hiroshi Sato and Tomohiro Shirakawa et al.
The invention relates to a vegetable disease classification detection method based on a human psychological cognition model, which is considered as systematic error in judgment and decision shared by human beings, and an unreasonable rational mode can make the human beings quickly judge and decide. The method is suitable for the situation that sample data is difficult to monitor and acquire during the identification of the green vegetable diseases.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.

Claims (2)

1. A classification detection method for recognizing vegetable diseases by a classifier based on human psychological cognition model improvement comprises the following steps:
step 1: acquiring and processing images to acquire a plurality of vegetable sample data of a diseased area and a normal area, and respectively using a diseased area sample x1、x2Drawing a circle for the circle center to find k nearest sample points;
step 2: respectively calculating the proportion of the disease sample and the normal sample in the nearest k sample points, and making a 2 x 2 list table to represent the sample x1Sample x2The probability of the disease sample and the probability of the normal sample as the disease sample appearing in the k nearest neighbor sample points are respectively expressed by letters a, b, c and d;
and step 3: tabulation made in connection with step 2Using human loose symmetry (LS model)
Figure FDA0003022179800000011
Recalculate sample xiThe probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points is taken as the probability of the disease sample and the normal sample appearing in the k nearest neighbor sample points;
and 4, step 4: using the value calculated in step 3 as a sample xiWeight in algorithm training process, the larger this value represents sample xiThe higher the accuracy of the decision, the farther away from the decision surface, the higher the weight occupied in the decision;
and 5: and repeating the steps to determine the weights of other disease samples and normal samples, carrying out final training by using an SVM algorithm, and carrying out training learning according to different importance degrees of different samples.
Step 6: and carrying out disease detection on the green vegetables to be detected by using a trained SVM classification detector.
2. The method for detecting the classified vegetable diseases based on the human mental cognitive model according to claim 1, wherein the method comprises the following steps: the psychological cognitive characteristics of people are added into the training process of the classification detection of the green vegetable diseases, the weight occupied by the disease samples during training is strengthened, and the classification detection precision of the classifier in the unbalanced training set is improved.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111738138A (en) * 2020-06-19 2020-10-02 安徽大学 Wheat stripe embroidery disease severity remote sensing monitoring method coupled with meteorological characteristic regional scale
CN112464983A (en) * 2020-10-28 2021-03-09 吉林大学 Small sample learning method for apple tree leaf disease image classification

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111738138A (en) * 2020-06-19 2020-10-02 安徽大学 Wheat stripe embroidery disease severity remote sensing monitoring method coupled with meteorological characteristic regional scale
CN112464983A (en) * 2020-10-28 2021-03-09 吉林大学 Small sample learning method for apple tree leaf disease image classification

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HIDETAKA TANIGUCHI等: "A machine learning model with human cognitive biases capable of learning from small and biased datasets", SCIENTIFIC REPORTS, pages 1 - 13 *

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