配置文件内容如下：

config = {
    'input_features': [
        {
            'name': 'image_path',
            'type': 'image',
            'preprocessing': {'num_processes': 4},
            'encoder': 'stacked_cnn',
            'conv_layers': [
                {'num_filters': 32, 'filter_size': 3, 'pool_size': 2, 'pool_stride': 2},
                {'num_filters': 64, 'filter_size': 3, 'pool_size': 2, 'pool_stride': 2, 'dropout': 0.4}
            ],
            'fc_layers': [{'output_size': 128, 'dropout': 0.4}]
        }
    ],
    'output_features': [{'name': 'label', 'type': 'binary'}],
    'trainer': {'epochs': 5}
}