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YOLO Detection on Grayscale Images

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Kev
Kev on 3 Nov 2020
Commented: Kev on 10 Nov 2020
Hi,
I am trying to detect objects in the grayscale images, but I get the following error.
"The input image channel size (1) must be the same as the network's input channel size (3)."
Per documentation, it says the network accpets single channel as well, but what could be the reason for the error?
Thanks!
  2 Comments
Kev
Kev on 6 Nov 2020
MATLAB 2020a, and same issue was observed on 2020b.

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Accepted Answer

Sunil Patidar
Sunil Patidar on 10 Nov 2020
Hi Kev,
It seems to be an issue with the 'trainYOLOV2ObjectDetector' function not being able to accept images that are of size [M x N x 1]. As a workaround you might need to duplicate your grayscale image across all three channels, and use a network that accepts [M x N x 3] sized matrices.
  1 Comment
Kev
Kev on 10 Nov 2020
It works after converting single channel grayscale into 3 channel grayscale.

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