K-最近邻（KNN）分类器

2024-07-26 40

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简介： 【7月更文挑战第26天】

knn 模型训练

data数据集的根目录， windows这样使用


# 加载数据
data_folder = './data'
# data_folder = 'D:/\st_dev/\data'
print(data_folder)
X, y = load_data(data_folder)

da 文件夹，da是数据集的标签， da中存放一类相似的图片数据。用于训练

re 存放两一类相似图片数据； re是识别后的标签。

模型文件保存项目根目录


# 保存模型
model_filename = 'knn_model.pkl'
with open(model_filename, 'wb') as model_file:
    pickle.dump(knn_classifier, model_file)

`
``js
import os
import pickle
from skimage import io, transform
from sklearn.model_selection import train_test_split
from sklearn.neighbors import KNeighborsClassifier
import numpy as np

导入UGOT机器人库

from ugot import ugot
import cv2

函数：从文件夹加载图像数据

def load_data(data_folder):
data = []
labels = []
for folder in os.listdir(data_folder):
folder_path = os.path.join(data_folder, folder)
print("正在:", folder_path) # 新增的打印语句
if os.path.isdir(folder_path):
label = folder
for filename in os.listdir(folder_path):
print("正在读取文件:", filename) # 新增的打印语句
img_path = os.path.join(folder_path, filename)
img = io.imread(img_path)
img = transform.resize(img, (50, 50)) # 调整图像大小为50x50像素
data.append(img.flatten()) # 将图像数据展平
labels.append(label)
return data, labels

加载数据

data_folder = './data'

data_folder = 'D:/\st_dev/\data'

print(data_folder)
X, y = load_data(data_folder)

将数据拆分为训练集和测试集

X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

初始化KNN分类器

knn_classifier = KNeighborsClassifier(n_neighbors=1)

训练模型

knn_classifier.fit(X_train, y_train)

评估模型

accuracy = knn_classifier.score(X_test, y_test)
print("Accuracy:", accuracy)

保存模型

model_filename = 'knn_model.pkl'
with open(model_filename, 'wb') as model_file:
pickle.dump(knn_classifier, model_file)

加载模型

with open(model_filename, 'rb') as model_file:
loaded_model = pickle.load(model_file)

函数：预测图像内容

def predict_image(img):
img = transform.resize(img, (50, 50))
flattened_img = img.flatten()
prediction = loaded_model.predict([flattened_img])
return prediction[0]

def predict_and_display_image(img):
img_resized = transform.resize(img, (50, 50))
flattened_img = img_resized.flatten()
prediction = loaded_model.predict([flattened_img])[0]
print(prediction) #调试信息

# 在图像上显示预测结果
cv2.putText(img, f'Prediction: {prediction}', (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 0, 0), 2)


cv2.imshow('Image', img)
cv2.waitKey(1)
# cv2.destroyAllWindows()

初始化UGOT机器人

got = ugot.UGOT()
got.initialize('10.10.4.230')
got.open_camera()

try:
while True:
frame = got.read_camera_data()
if frame is not None:
nparr = np.frombuffer(frame, np.uint8)
img = cv2.imdecode(nparr, cv2.IMREAD_COLOR)

        # 使用加载的模型进行预测并在图像上显示结果
        predict_and_display_image(img)

        # 在此处添加物体跟随和闭环控制逻辑
        # print('-------:', got.get_knn_result('knn_model'))

except KeyboardInterrupt:
print('-----KeyboardInterrupt')

```