Load a Network by Usingcoder.loadDeepLearningNetwork

You can load a network object from any network that is supported for code generation by usingcoder.loadDeepLearningNetwork. You can specify the network from a MAT-file. The MAT-file must contain only the network to be loaded.

For example, suppose that you create a trained network object calledmyNetby using thetrainNetwork(Deep Learning Toolbox)function. Then, you save the workspace by enteringsave. This creates a file calledmatlab.matthat contains the network object. To load the network objectmyNet, enter:

net = coder.loadDeepLearningNetwork('matlab.mat');

You can also specify the network by providing the name of a function that does not accept an input argument and returns a pretrainedSeriesNetwork,DAGNetwork,yolov2ObjectDetector, orssdObjectDetectorobject, such as:

For example, load a network object by entering:

net = coder.loadDeepLearningNetwork('googlenet');

The Deep Learning Toolbox™ functions in the previous list require that you install a support package for the function. SeePretrained Deep Neural Networks(Deep Learning Toolbox).

Specify a Network Object for Code Generation

If you generate code by usingcodegenor the app, load the network object inside of your entry-point function by usingcoder.loadDeepLearningNetwork. For example:

functionout = myNet_predict(in)%#codegenpersistentmynet;ifisempty(mynet) mynet = coder.loadDeepLearningNetwork('matlab.mat');endout = predict(mynet,in);

For pretrained networks that are available as support package functions such asalexnet,inceptionv3,googlenet, andresnet, you can directly specify the support package function, for example, by writingmynet = googlenet.

接下来,生成代码的入口点函数。For example:

cfg = coder.gpuConfig('mex'); cfg.TargetLang ='C++'; cfg.DeepLearningConfig = coder.DeepLearningConfig('cudnn'); codegen-args{ones(224,224,3,'single')}-configcfgmyNet_predict

Specify adlnetworkObject for Code Generation

Suppose you have a pretraineddlnetworknetwork object in themynet.matMAT-file. To predict the responses for this network, create an entry-point function in MATLAB^®as shown in this code.

functiona = myDLNet_predict(in) dlIn = dlarray(in,'SSC');persistentdlnet;ifisempty(dlnet) dlnet = coder.loadDeepLearningNetwork('mynet.mat');enddlA = predict(dlnet, dlIn); a = extractdata(dlA);end

In this example, the input and output tomyDLNet_predictare of simpler datatypes and thedlarrayobject is created within the function. Theextractdata(Deep Learning Toolbox)method of thedlarrayobject returns the data in thedlarraydlAas the output ofmyDLNet_predict. The outputahas the same data type as the underlying data type indlA. This entry-point design has the following advantages:

接下来,生成代码的入口点函数。For example:

cfg = coder.gpuConfig('lib'); cfg.TargetLang ='C++'; cfg.DeepLearningConfig = coder.DeepLearningConfig('cudnn'); codegen-args{ones(224,224,3,'single')}-configcfgmyDLNet_predict