habana_frameworks.mediapipe.fn.Transpose
habana_frameworks.mediapipe.fn.Transpose¶
- Class:
habana_frameworks.mediapipe.fn.Transpose(**kwargs)
- Define graph call:
__call__(input)
- Parameter:
input - Input tensor to operator. Supported dimensions: minimum = 1, maximum = 5. Supported data types: INT8, UINT8, BFLOAT16, FLOAT32.
Description:
Produces a transposed tensor of the input tensor along multiple axes. See https://github.com/onnx/onnx/blob/rel-1.9.0/docs/Operators.md#Transpose.
- Supported backend:
HPU
Keyword Arguments
kwargs |
Description |
---|---|
permutation |
Each location in the permutation array defines to which dimension this location will be transposed to, permutation[rank(Input tensor)],
|
tensorDim |
Number of valid entries in the permutation array.
|
dtype |
Output data type.
|
Note
Input/output tensors must be of the same datatype.
Input/output tensor must have same number of dimensions and total elements.
Example: Transpose Operator
The following code snippet shows usage of Transpose operator:
from habana_frameworks.mediapipe import fn
from habana_frameworks.mediapipe.mediapipe import MediaPipe
from habana_frameworks.mediapipe.media_types import imgtype as it
from habana_frameworks.mediapipe.media_types import dtype as dt
import matplotlib.pyplot as plt
# Create media pipeline derived class
class myMediaPipe(MediaPipe):
def __init__(self, device, dir, queue_depth, batch_size, img_h, img_w):
super(
myMediaPipe,
self).__init__(
device,
queue_depth,
batch_size,
self.__class__.__name__)
self.input = fn.ReadImageDatasetFromDir(shuffle=False,
dir=dir,
format="jpg")
# WHCN
self.decode = fn.ImageDecoder(device="hpu",
output_format=it.RGB_P,
resize=[img_w, img_h])
# WHCN -> CWHN
self.transpose = fn.Transpose(permutation=[2, 0, 1, 3],
tensorDim=4,
dtype=dt.UINT8)
def definegraph(self):
images, labels = self.input()
images = self.decode(images)
images = self.transpose(images)
return images, labels
def main():
batch_size = 6
img_width = 200
img_height = 200
img_dir = "/path/to/images"
queue_depth = 2
# Create media pipeline object
pipe = myMediaPipe('hpu', img_dir, queue_depth, batch_size,
img_height, img_width)
# Build media pipeline
pipe.build()
# Initialize media pipeline iterator
pipe.iter_init()
# Run media pipeline
images, labels = pipe.run()
# Copy data to host from device as numpy array
images = images.as_cpu().as_nparray()
labels = labels.as_cpu().as_nparray()
# Display shape
print(images.shape)
if __name__ == "__main__":
main()
Images shape before transpose operation: NCHW
image shape: (6, 3, 200, 200)
Images shape after transpose operation: NHWC
image shape: (6, 200, 200, 3)