/// <summary>
/// Use the generator to create a list of fake images/
/// </summary>
/// <param name="generator">The generator to use.</param>
/// <param name="batchSize">The batch size.</param>
/// <param name="latentDimensions">The number of dimensions in the latent input vector.</param>
/// <returns>A list of images created by the generator.</returns>
public static IList <IList <float> > GenerateImages(
CNTK.Function generator,
int batchSize,
int latentDimensions)
{
// set up a Gaussian random number generator
var random = new Random();
var gaussianRandom = new GaussianRandom(random);
// set up randomized input for the generator
var random_latent_vectors = gaussianRandom.getFloatSamples(batchSize * latentDimensions);
var random_latent_vectors_nd = new CNTK.NDArrayView(new int[] { latentDimensions, 1, batchSize }, random_latent_vectors, NetUtil.CurrentDevice);
var generator_inputs = new Dictionary <CNTK.Variable, CNTK.Value>()
{
{ generator.Arguments[0], new CNTK.Value(random_latent_vectors_nd) }
};
var generator_outputs = new Dictionary <CNTK.Variable, CNTK.Value>()
{
{ generator.Output, null }
};
// run the generator and collect the images
generator.Evaluate(generator_inputs, generator_outputs, NetUtil.CurrentDevice);
return(generator_outputs[generator.Output].GetDenseData <float>(generator.Output));
}
public static (CNTK.Value featureBatch, CNTK.Value labelBatch) GetMisleadingBatch(
CNTK.Function gan,
int batchSize,
int latentDimensions)
{
// set up a Gaussian random number generator
var random = new Random();
var gaussianRandom = new GaussianRandom(random);
// prepare a batch to fool the discriminator: we generate fake images
// but we label them as real with label=0
var random_latent_vectors = gaussianRandom.getFloatSamples(batchSize * latentDimensions);
var misleading_targets = new float[batchSize];
var random_latent_vectors_nd = new CNTK.NDArrayView(new int[] { latentDimensions, 1, batchSize }, random_latent_vectors, NetUtil.CurrentDevice);
// return results
return(
new CNTK.Value(random_latent_vectors_nd),
CNTK.Value.CreateBatch(new CNTK.NDShape(0), misleading_targets, NetUtil.CurrentDevice, true)
);
}