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• Operator description: Blends the input new background image with the existing image, and replaces the background with the new background by using mask.

• Formula:

  $$out = bkg * (1 - mask) + src * mask$$

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Each operator has calls. First, aclnnBackgroundReplaceGetWorkspaceSize is called to obtain the input parameters and compute the required workspace size based on the process. Then, aclnnBackgroundReplace is called to perform computation.

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• Parameters:

  • bkg (aclTensor*, compute input): aclTensor on the device. The data type can be UINT8 or FLOAT16, and the shape supports HWC (C = 1 or 3). Only contiguous tensors are supported. The can be ND.
  • src (aclTensor*, compute input): aclTensor on the device. The data type can be UINT8 or FLOAT16, and the shape supports HWC (C = 1 or 3). Only contiguous tensors are supported. The can be ND.
  • mask (aclTensor*, compute input): aclTensor on the device. The data type can be FLOAT16, and the shape supports HWC (C = 1). Only contiguous tensors are supported. The can be ND.
  • out (aclTensor*, compute output): aclTensor on the device. The data type can be UINT8 or FLOAT16, and the shape supports HWC (C = 1 or 3). The data type and shape are the same as those of the input background image bkg. Only contiguous tensors are supported. The supports ND.
  • workspaceSize (uint64_t *, output): size of the workspace to be allocated on the device.
  • executor (aclOpExecutor **, output): operator executor, containing the operator computation process.

• Returns:

  aclnnStatus: status code. For details, see .

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• Parameters:

  • workspace (void *, input): address of the workspace to be allocated on the device.
  • workspaceSize (uint64_t, input): size of the workspace to be allocated on the device, which is obtained by calling the first-phase API aclnnBackgroundReplaceGetWorkspaceSize.
  • executor (aclOpExecutor *, input): operator executor, containing the operator computation process.
  • stream (aclrtStream, input): stream for executing the task.

• Returns:

  aclnnStatus: status code. For details, see .

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• Deterministic computing:
  • aclnnBackgroundReplace defaults to a deterministic implementation.

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The following example is for reference only. For details, see .