用Java写农产品智能分类
时间: 2023-08-16 12:07:34 浏览: 56
以下是一个简单的农产品智能分类Java程序示例,使用了OpenCV和Weka库:
```
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import weka.classifiers.Classifier;
import weka.classifiers.functions.MultilayerPerceptron;
import weka.core.Attribute;
import weka.core.DenseInstance;
import weka.core.Instance;
import weka.core.Instances;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
public class CropClassifier {
public static void main(String[] args) {
// 加载OpenCV库
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
// 加载数据集
Instances dataset = loadDataset("dataset.arff");
// 训练模型
Classifier model = trainModel(dataset);
// 加载测试图片并进行预测
Mat image = Imgcodecs.imread("test.jpg");
Mat processedImage = preprocessImage(image);
Instance instance = createInstance(processedImage);
double prediction = predict(model, instance);
// 输出预测结果
System.out.println("Prediction: " + dataset.classAttribute().value((int) prediction));
}
// 加载数据集
private static Instances loadDataset(String filename) {
try {
Instances dataset = new Instances(new FileInputStream(filename));
dataset.setClassIndex(dataset.numAttributes() - 1);
return dataset;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
// 训练模型
private static Classifier trainModel(Instances dataset) {
try {
MultilayerPerceptron model = new MultilayerPerceptron();
model.buildClassifier(dataset);
return model;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
// 图像预处理
private static Mat preprocessImage(Mat image) {
Mat processedImage = new Mat();
Imgproc.resize(image, processedImage, new Size(64, 64));
Imgproc.cvtColor(processedImage, processedImage, Imgproc.COLOR_BGR2GRAY);
Imgproc.GaussianBlur(processedImage, processedImage, new Size(3, 3), 0);
Core.divide(processedImage, new Scalar(255), processedImage);
return processedImage;
}
// 创建测试实例
private static Instance createInstance(Mat image) {
ArrayList<Attribute> attributes = new ArrayList<>();
for (int i = 0; i < image.total(); i++) {
attributes.add(new Attribute("pixel" + i));
}
attributes.add(new Attribute("class", new ArrayList<String>() {{
add("crop1");
add("crop2");
add("crop3");
}}));
Instances dataset = new Instances("test", attributes, 1);
dataset.setClassIndex(dataset.numAttributes() - 1);
double[] values = new double[dataset.numAttributes()];
for (int i = 0; i < image.total(); i++) {
values[i] = image.get(i / image.cols(), i % image.cols())[0];
}
Instance instance = new DenseInstance(1.0, values);
instance.setDataset(dataset);
return instance;
}
// 进行预测
private static double predict(Classifier model, Instance instance) {
try {
return model.classifyInstance(instance);
} catch (Exception e) {
e.printStackTrace();
return -1;
}
}
}
```
以上示例中,`loadDataset()`函数用于加载数据集,`trainModel()`函数用于训练模型,`preprocessImage()`函数用于图像预处理,`createInstance()`函数用于创建测试实例,`predict()`函数用于进行预测。在示例中,我们使用了多层感知机(Multilayer Perceptron)作为分类器,将图像预处理后的像素作为特征,将农产品种类作为类别。在实际应用中,可以根据需要选择更加复杂的模型和特征。