# 加载YOLO net = cv2.dnn.readNet("yolov3.weights", "yolov3.cfg") layer_names = net.getLayerNames() output_layers = [layer_names[i[0] - 1] for i in net.getUnconnectedOutLayers()]
# 提取信息并绘制检测框 for out in outs: for detection in out: scores = detection[5:] class_id = np.argmax(scores) confidence = scores[class_id] if confidence > 0.5: # 计算坐标并绘制框 ...
from sklearn.datasets import fetch_openml from sklearn.model_selection import train_test_split from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import classification_report
# 加载数据 X, y = fetch_openml('mnist_784', version=1, return_X_y=True) X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.1, random_state=42)
# 使用随机森林分类器 model = RandomForestClassifier(n_estimators=100) model.fit(X_train, y_train)
import pandas as pd from sklearn.datasets import load_iris from sklearn.model_selection import train_test_split from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import classification_report
# 加载数据 iris = load_iris() X = iris.data y = iris.target