application_mobilenet: MobileNet model architecture.

In keras: R Interface to 'Keras'

MobileNet model architecture.

Description

MobileNet model architecture.

Usage

application_mobilenet(
  input_shape = NULL,
  alpha = 1,
  depth_multiplier = 1L,
  dropout = 0.001,
  include_top = TRUE,
  weights = "imagenet",
  input_tensor = NULL,
  pooling = NULL,
  classes = 1000L,
  classifier_activation = "softmax",
  ...
)

mobilenet_preprocess_input(x)

mobilenet_decode_predictions(preds, top = 5)

mobilenet_load_model_hdf5(filepath)

Arguments

input_shape	optional shape list, only to be specified if include_top is FALSE (otherwise the input shape has to be ⁠(224, 224, 3)⁠ (with channels_last data format) or (3, 224, 224) (with channels_first data format). It should have exactly 3 inputs channels, and width and height should be no smaller than 32. E.g. ⁠(200, 200, 3)⁠ would be one valid value.
alpha	controls the width of the network. If alpha < 1.0, proportionally decreases the number of filters in each layer. If alpha > 1.0, proportionally increases the number of filters in each layer. If alpha = 1, default number of filters from the paper are used at each layer.
depth_multiplier	depth multiplier for depthwise convolution (also called the resolution multiplier)
dropout	dropout rate
include_top	whether to include the fully-connected layer at the top of the network.
weights	NULL (random initialization), imagenet (ImageNet weights), or the path to the weights file to be loaded.
input_tensor	optional Keras tensor (i.e. output of layer_input()) to use as image input for the model.
pooling	Optional pooling mode for feature extraction when include_top is FALSE. - NULL means that the output of the model will be the 4D tensor output of the last convolutional layer. - avg means that global average pooling will be applied to the output of the last convolutional layer, and thus the output of the model will be a 2D tensor. - max means that global max pooling will be applied.
classes	optional number of classes to classify images into, only to be specified if include_top is TRUE, and if no weights argument is specified.
classifier_activation	A string or callable. The activation function to use on the "top" layer. Ignored unless include_top = TRUE. Set classifier_activation = NULL to return the logits of the "top" layer. Defaults to 'softmax'. When loading pretrained weights, classifier_activation can only be NULL or "softmax".
...	For backwards and forwards compatibility
x	input tensor, 4D
preds	Tensor encoding a batch of predictions.
top	integer, how many top-guesses to return.
filepath	File path

Details

The mobilenet_preprocess_input() function should be used for image preprocessing. To load a saved instance of a MobileNet model use the mobilenet_load_model_hdf5() function. To prepare image input for MobileNet use mobilenet_preprocess_input(). To decode predictions use mobilenet_decode_predictions().

Value

application_mobilenet() and mobilenet_load_model_hdf5() return a Keras model instance. mobilenet_preprocess_input() returns image input suitable for feeding into a mobilenet model. mobilenet_decode_predictions() returns a list of data frames with variables class_name, class_description, and score (one data frame per sample in batch input).

Reference

• MobileNets: Efficient Convolutional Neural Networks for Mobile Vision Applications.

keras documentation built on May 29, 2024, 3:20 a.m.