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skn133229 OP t1_j1r2xr1 wrote

Reply to comment by 86BillionFireflies in [D] Normalized images in UNET by skn133229

I have a pretty elaborate augmentation process implemented. I will try to randomly shift the mean of each image to see if this helps. Not sure if the fact that all images average to 0 is now a problem.

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86BillionFireflies t1_j1r4etj wrote

Well, it's possible, and it certainly sounds like there's reason to suspect some kind of normalization related gotcha.

Maybe the scale of the values, rather than the mean being zero, is the issue?Perhaps a larger or smaller SD would change the outcome? Or a different initialization, especially if using relu. You could also try normalizing the data to have mean 0.1 and SD 1, in case it's some kind of dead relu issue. I'm really spitballing there.

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crrrr30 t1_j1t7ybg wrote

perhaps also try random gamma or something like that? contrast could be an issue.

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