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Lakonik avatar Lakonik commented on September 6, 2024 1

Theoretically these logprobs can be backpropagated. But I don't think information extracted from the pose distribution can help improve the classification.

+ np.log(orient_bins / (2 * np.pi)) is meant to convert the bin probabilities into a continuous density function on [0, 2pi), such that the integral equals 1. This is mainly for visualization purpose.

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harsanyidani avatar harsanyidani commented on September 6, 2024

I was experimenting with this and I have a question in connection with this.

orient_logprob = cost.neg().log_softmax(dim=0) + np.log(orient_bins / (2 * np.pi))

Here, we don't exactly get logprobs, but a constant is added to each probability based on the density of the distribution (+ np.log(orient_bins / (2 * np.pi)), so the probabilities won't sum to one.
What is the purpose of this? Better visualization/numerical stability?
Thanks in advance!

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harsanyidani avatar harsanyidani commented on September 6, 2024

Theoretically these logprobs can be backpropagated. But I don't think information extracted from the pose distribution can help improve the classification.

I understand. But theoretically, the yaw angle distribution evaluated with some density from 0 to 2pi would roughly look like the logprobs here?

orient_logprob = cost.neg().log_softmax(dim=0) + np.log(orient_bins / (2 * np.pi))

np.log(orient_bins / (2 * np.pi)) is meant to convert the bin probabilities into a continuous density function on [0, 2pi), such that the integral equals 1. This is mainly for visualization purpose.

I don't understand this. Without np.log(orient_bins / (2 * np.pi)), the probabililities sum to one, with it they don't.

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