Sensor model¶
The class otb::SensorTransformBase
is the base class for sensor
models. It inherits from otb::Transform
, which inherits from
itk::Transform
. It is templated over the data type, and input and
output dimentions. All sensor model classes should inherit from it,
and implement the methods:
SetMetadataModel
that takes aboost::any
object representing the model;IsValidSensorModel
that returns true if the model is correctly set;TransformPoint
that process the transformation.

RPC sensor model¶
The structure otb::Projection::RPCParam
is used to store the
parameters of the RPC model. It is based on GDAL’s RPC structure.
The RPC model is stored in the otb::ImageMetadata
object, using
the key MDGeom::RPC
. The classes otb::RPCTransformBase
,
otb::RPCForwardTransform
and otb::RPCInverseTransform
are used
to perform forward and inverse transformation using this model.
The abstract class otb::RPCTransformBase
contains the
implementation of the SetMetadataModel method, which receives the RPC
description from the otb::ImageMetadata
and instantiates an
otb::GDALRPCTransformer
.
The classes otb::RPCForwardTransform
and
otb::RPCInverseTransform
each implement a version of the
TransformPoint
method which uses the otb::GDALRPCTransformer
.