Function Usage

Tensor weighted mixing API (dst = alpha × src1 + beta × src2 + gamma) of the image processing class. The float16, float32, and uint8 data types are supported. Asynchronous calling is supported. The inplace operation is not supported.

It is supported by the Atlas inference product and Atlas 200I/500 A2 inference product.

For the Atlas 200I/500 A2 inference product, preloading is supported. (The attr attribute needs to be added during preloading. For details, see Example of the Preloading File of the Initialization Operator.)

The following conditions must be met:

The input and output tensors must be on the device or DVPP side, and the parameters (stream and data memory) must be on the same device.
For synchronization, the device where the data memory is located must be the same as the initialized device.
Handle the issue of out-of-range data if any.
The input and output parameters cannot exceed four dimensions, and must match the tensor shapes and types.

Prototype

APP_ERROR AddWeighted(const Tensor &src1, float alpha, const Tensor &src2, float beta, float gamma, Tensor &dst,  AscendStream &stream = AscendStream::DefaultStream());

Parameters

Parameter	Input/Output	Description
src1	Input	Tensor class, input tensor, supporting the float16, float32, and uint8 data types. The data memory must be on the device or DVPP side.
alpha	Input	Float type. Coefficient of tensor src1.
src2	Input	Tensor class, input tensor, supporting the float16, float32, and uint8 data types. The data memory must be on the device or DVPP side.
beta	Input	Float type. Coefficient of tensor src2.
gamma	Input	Float type. It is used to calculate the sum of dst.
dst	Output	Tensor class, output tensor, supporting the float16, float32, and uint8 data types. An empty tensor can be passed. If dst is not empty, the shape of dst must be the same as that of src1 or src2. Call Tensor.Malloc() to allocate memory in advance. The data memory must be on the device (the same device as that of src) or DVPP.
stream	Input	AscendStream type. The default value is AscendStream::DefaultStream(). When the parameter value is the default value, the API calling is a synchronous operation. In other cases, the API calling is an asynchronous operation.

Response Parameters

Data Structure	Description
APP_ERROR	For details about the returned error codes, see APP_ERROR Description.