with mp_holistic.Holistic( min_detection_confidence=0.1, min_tracking_confidence=0.1) as holistic:
时间: 2024-04-02 08:32:04 浏览: 16
这段代码使用了 mediapipe 库中的 Holistic 模型,用于进行人体姿态估计和面部关键点检测。其中 min_detection_confidence 和 min_tracking_confidence 分别设置了检测和跟踪的最小置信度阈值。这个模型可以用于许多应用,比如人脸识别、手势识别、动作捕捉等等。
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import cv2 import mediapipe as mp mp_drawing = mp.solutions.drawing_utils mp_drawing_styles = mp.solutions.drawing_styles mp_holistic = mp.solutions.holistic # For webcam input: filepath='F:\\video000\\ce.mp4' cap = cv2.VideoCapture(filepath) with mp_holistic.Holistic( min_detection_confidence=0.5, min_tracking_confidence=0.5) as holistic: while cap.isOpened(): success, image = cap.read() if not success: print("Ignoring empty camera frame.") # If loading a video, use 'break' instead of 'continue'. break # To improve performance, optionally mark the image as not writeable to # pass by reference. image.flags.writeable = False image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB) results = holistic.process(image) # Draw landmark annotation on the image. image.flags.writeable = True image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR) mp_drawing.draw_landmarks( image, results.face_landmarks, mp_holistic.FACEMESH_CONTOURS, landmark_drawing_spec=None, connection_drawing_spec=mp_drawing_styles .get_default_face_mesh_contours_style()) mp_drawing.draw_landmarks( image, results.pose_landmarks, mp_holistic.POSE_CONNECTIONS, landmark_drawing_spec=mp_drawing_styles .get_default_pose_landmarks_style()) # Flip the image horizontally for a selfie-view display. cv2.imshow('MediaPipe Holistic', cv2.flip(image, 1)) if cv2.waitKey(5) & 0xFF == 27: break cap.release() 在这段代码中引入注意力机制,使人体步态特征更好的提取
在这段代码中,要引入注意力机制以提取人体步态特征,可以考虑在Holistic模型的输出结果中使用注意力机制进行加权融合,以强化对关键信息的关注和捕捉。具体操作如下:
1. 在Holistic模型的process()函数中,设置use_attention=True,以启用注意力机制。
2. 在Holistic模型的输出结果中,选择关键的特征点或特征向量,并使用注意力机制进行加权融合,以得到最终的人体步态特征表示。
3. 对特征表示进行进一步的处理和分类,以实现步态识别等应用。
下面是一个示例代码,用于在Holistic模型中引入注意力机制:
```
import cv2
import mediapipe as mp
mp_drawing = mp.solutions.drawing_utils
mp_drawing_styles = mp.solutions.drawing_styles
mp_holistic = mp.solutions.holistic
# For webcam input:
filepath = 'F:\\video000\\ce.mp4'
cap = cv2.VideoCapture(filepath)
with mp_holistic.Holistic(
min_detection_confidence=0.5,
min_tracking_confidence=0.5,
use_attention=True) as holistic:
while cap.isOpened():
success, image = cap.read()
if not success:
print("Ignoring empty camera frame.")
# If loading a video, use 'break' instead of 'continue'.
break
# To improve performance, optionally mark the image as not writeable to
# pass by reference.
image.flags.writeable = False
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
results = holistic.process(image)
# Extract the key feature points or vectors from the output results.
pose_landmarks = results.pose_landmarks.landmark
face_landmarks = results.face_landmarks.landmark
left_hand_landmarks = results.left_hand_landmarks.landmark
right_hand_landmarks = results.right_hand_landmarks.landmark
# Apply attention mechanism to the key feature points or vectors.
pose_attention = apply_attention(pose_landmarks)
face_attention = apply_attention(face_landmarks)
left_hand_attention = apply_attention(left_hand_landmarks)
right_hand_attention = apply_attention(right_hand_landmarks)
# Combine the attention-weighted feature vectors to form the final gait feature.
gait_feature = np.concatenate([pose_attention, face_attention, left_hand_attention, right_hand_attention])
# Further process and classify the gait feature to achieve gait recognition.
...
# Draw landmark annotation on the image.
image.flags.writeable = True
image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)
mp_drawing.draw_landmarks(
image,
results.face_landmarks,
mp_holistic.FACEMESH_CONTOURS,
landmark_drawing_spec=None,
connection_drawing_spec=mp_drawing_styles
.get_default_face_mesh_contours_style())
mp_drawing.draw_landmarks(
image,
results.pose_landmarks,
mp_holistic.POSE_CONNECTIONS,
landmark_drawing_spec=mp_drawing_styles
.get_default_pose_landmarks_style())
# Flip the image horizontally for a selfie-view display.
cv2.imshow('MediaPipe Holistic', cv2.flip(image, 1))
if cv2.waitKey(5) & 0xFF == 27:
break
cap.release()
```
其中,apply_attention()函数用于对输入的特征点或特征向量应用注意力机制,可以根据具体需求选择不同的注意力模型和参数。注意力机制的加权融合可以使用numpy库中的矩阵乘法或加法等运算实现。
mediapipe 0.8.9 用holistic_tracking_cpu.pbtxt输出右肩坐标
在Mediapipe 0.8.9中,可以使用Holistic模型进行人体姿态估计和跟踪,并输出右肩的坐标。具体方法如下:
1. 配置Holistic模型:在Mediapipe中,需要使用Holistic模型进行人体姿态估计和跟踪,可以通过MediaPipe框架提供的HolisticCalculator类或者直接使用HolisticGraph.pbtxt来进行配置。
2. 处理输入图像:在运行Holistic模型之前,需要将输入图像进行处理,将图像数据转换为TensorFlow的输入格式,并将其传递给Holistic模型进行处理。
3. 解析输出结果:在Holistic模型处理完毕后,可以从输出结果中解析出右肩的坐标。
4. 输出右肩坐标:根据Holistic模型输出的关键点编号,可以获取右肩的坐标。
下面是在Python中使用Holistic模型输出右肩坐标的示例代码:
```python
import cv2
import mediapipe as mp
# 配置Holistic模型
mp_holistic = mp.solutions.holistic
holistic = mp_holistic.Holistic(static_image_mode=False, min_detection_confidence=0.5, min_tracking_confidence=0.5)
# 加载图像
image = cv2.imread('image.jpg')
# 处理输入图像
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
results = holistic.process(image)
# 解析输出结果
if results.pose_landmarks is not None:
# 获取右肩坐标
right_shoulder_x = results.pose_landmarks.landmark[mp_holistic.PoseLandmark.RIGHT_SHOULDER].x
right_shoulder_y = results.pose_landmarks.landmark[mp_holistic.PoseLandmark.RIGHT_SHOULDER].y
right_shoulder_z = results.pose_landmarks.landmark[mp_holistic.PoseLandmark.RIGHT_SHOULDER].z
# 输出右肩坐标
print('Right shoulder coordinate: ({}, {}, {})'.format(right_shoulder_x, right_shoulder_y, right_shoulder_z))
else:
print('No pose landmarks detected.')
```
需要注意的是,Holistic模型输出的坐标值是归一化的坐标值,范围在[0, 1]之间。如果需要将其转换为图像坐标或者其他坐标系的坐标值,需要进行相应的转换。