用python写一个pointnet点云分类代码

以下是一个简单的 Python 代码，用于 PointNet 点云分类：

import tensorflow as tf
from tensorflow.keras import layers

def pointnet(input_shape, num_classes):
    inputs = layers.Input(shape=input_shape)

    # Transform Net
    x = layers.Conv1D(64, 1, activation='relu')(inputs)
    x = layers