private VectorToImageConvertingTransformer(IHost host, ModelLoadContext ctx)
: base(host, ctx)
{
Host.AssertValue(ctx);
// *** Binary format ***
// <base>
// foreach added column
// ColumnOptions
_columns = new VectorToImageConvertingEstimator.ColumnOptions[ColumnPairs.Length];
for (int i = 0; i < _columns.Length; i++)
{
_columns[i] = new VectorToImageConvertingEstimator.ColumnOptions(ColumnPairs[i].outputColumnName, ColumnPairs[i].inputColumnName, ctx);
}
}
// Constructor corresponding to SignatureDataTransform.
internal static IDataTransform Create(IHostEnvironment env, Options args, IDataView input)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(args, nameof(args));
env.CheckValue(input, nameof(input));
env.CheckValue(args.Columns, nameof(args.Columns));
var columns = new VectorToImageConvertingEstimator.ColumnOptions[args.Columns.Length];
for (int i = 0; i < columns.Length; i++)
{
var item = args.Columns[i];
columns[i] = new VectorToImageConvertingEstimator.ColumnOptions(item, args);
}
var transformer = new VectorToImageConvertingTransformer(env, columns);
return(new RowToRowMapperTransform(env, input, transformer.MakeRowMapper(input.Schema), transformer.MakeRowMapper));
}
