Computes and stores the average and current value

Encoder for instance discrimination and MoCo

Eq. (12): L_{NCE}

Softmax cross-entropy loss (a.k.a., info-NCE loss in CPC paper)

From: https://hips.seas.harvard.edu/blog/2013/03/03/the-alias-method-efficient-sampling-with-many-discrete-outcomes/

Folder datasets which returns the index of the image as well

Convert RGB PIL image to ndarray Lab.

Convert RGB PIL image to ndarray YCbCr.

Memory bank with instance discrimination

Fixed-size queue with momentum encoder

Convert RGB PIL image to ndarray RGBCIE.

Convert RGB PIL image to ndarray HED.

Convert RGB PIL image to ndarray HSV.

Convert RGB PIL image to ndarray LUV.

Convert RGB PIL image to ndarray XYZ.

Convert RGB PIL image to ndarray YDbDr.

Convert RGB PIL image to ndarray YIQ.

Convert RGB PIL image to ndarray YPbPr.

Convert RGB PIL image to ndarray YUV.