How do you read R, G, B?

[longmalongma]

TODO: vectorise this code!What does this sentence mean?Is the code for reading R, G, and B correct?How do you read R, G, B?

[longmalongma]

TODO: vectorise this code!What does this sentence mean?Is the code for reading R, G, and B correct?How do you read R, G, B?

My dimension is [batch,channel,H,W]. What code should I write to read R, G, B?