Slice

tensorflow C++ API

tensorflow::ops::Slice

Return a slice from ‘input’.

Summary

The output tensor is a tensor with dimensions described by ‘size’ whose values are extracted from ‘input’ starting at the offsets in ‘begin’.

Requirements: 0 <= begin[i] <= begin[i] + size[i] <= Di for i in [0, n)

Arguments:

• scope: A Scope object
• begin: begin[i] specifies the offset into the ‘i’th dimension of ‘input’ to slice from.
• size: size[i] specifies the number of elements of the ‘i’th dimension of ‘input’ to slice. If size[i] is -1, all remaining elements in dimension i are included in the slice (i.e. this is equivalent to setting size[i] = input.dim_size(i) - begin[i]).

Returns:

• Output: The output tensor.

Slice block

Source link :https://github.com/EXPNUNI/enuSpaceTensorflow/blob/master/enuSpaceTensorflow/tf_array_ops.cpp

Argument:

• Scope scope : A Scope object (A scope is generated automatically each page. A scope is not connected.)
• Input input: Any tensor.
• Input begin: begin[i] specifies the offset into the ‘i’th dimension of ‘input’ to slice from.
• Input size: size[i] specifies the number of elements of the ‘i’th dimension of ‘input’ to slice. If size[i] is -1, all remaining elements in dimension i are included in the slice (i.e. this is equivalent to setting size[i] = input.dim_size(i) - begin[i]).

Output:

• Output output: Output object of Slice class object.

Result:

• std::vector(Tensor) result_output: The number of values in input.

Using Method

※ input으로 들어온 tensor를 자르는 기능을 하는 블럭이다.
※ begin과 size는 input의 rank만큼의 1-D tensor이다.
※ begin은 input각 rank의 시작 지점을 정한다.
※ size는 begin으로 부터 얼마만큼 자를 것인가를 정하는 값이다. (begin[1].value + size[1].value <= input[ 1-rank ].size)