Intel® Distribution of OpenVINO™ Toolkit
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Why NCHW as input type in examples?

Deblauwe__Tom
Beginner
714 Views

Hi,

Out of curiosity, why are the openvino samples all setting the NCHW layout and not NHWC layout as opencv provides by default when you read an image? Now every example has to convert the image itself to the correct format... and loop over all the pixels for this conversion...

Best regards,

Tom,

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Shubha_R_Intel
Employee
713 Views

Dearest Tom,

The reason for this is that Tensorflow is the only network out there who uses NHWC. All other networks use NCHW. Thus OpenVino's Inference Engine satisfies the majority so it also uses NCHW layout. Models of all network flavors must be converted to NCHW layout in order to work with Inference Engine.

Hope this explains it !

Thanks,

Shubha

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Shubha_R_Intel
Employee
714 Views

Dearest Tom,

The reason for this is that Tensorflow is the only network out there who uses NHWC. All other networks use NCHW. Thus OpenVino's Inference Engine satisfies the majority so it also uses NCHW layout. Models of all network flavors must be converted to NCHW layout in order to work with Inference Engine.

Hope this explains it !

Thanks,

Shubha

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