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fix live preview & alternate uncond guidance for better quality

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This commit is contained in:
devdn 2023-03-30 00:54:28 -04:00
parent bc90592031
commit 44e8e9c368
1 changed files with 8 additions and 6 deletions
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8
modules/sd_samplers_kdiffusion.py
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@ -116,8 +116,10 @@ class CFGDenoiser(torch.nn.Module):
tensor = denoiser_params.text_cond
uncond = denoiser_params.text_uncond
sigma_thresh = s_min_uncond
if(torch.dot(sigma,sigma) < sigma.shape[0] * (sigma_thresh*sigma_thresh) and not is_edit_model):
if self.step % 2 and s_min_uncond > 0 and not is_edit_model:
# alternating uncond allows for higher thresholds without the quality loss normally expected from raising it
sigma_threshold = s_min_uncond
if(torch.dot(sigma,sigma) < sigma.shape[0] * (sigma_threshold*sigma_threshold) ):
uncond = torch.zeros([0,0,uncond.shape[2]])
x_in=x_in[:x_in.shape[0]//2]
sigma_in=sigma_in[:sigma_in.shape[0]//2]
@ -159,7 +161,7 @@ class CFGDenoiser(torch.nn.Module):
devices.test_for_nans(x_out, "unet")
if opts.live_preview_content == "Prompt":
sd_samplers_common.store_latent(x_out[0:uncond.shape[0]])
sd_samplers_common.store_latent(x_out[0:x_out.shape[0]-uncond.shape[0]])
elif opts.live_preview_content == "Negative prompt":
sd_samplers_common.store_latent(x_out[-uncond.shape[0]:])