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Fix visible trailing semi-transparent hard edge in normal tiling mode (when img2img diverges between tiles) using an asymmetric alpha mask in the corner. (LTaC fix)

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Travis Palmer 2022-09-15 17:26:53 -04:00
parent 81bb44319a
commit 96d7639d2a
1 changed files with 29 additions and 6 deletions
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35
ldm/dream/generator/embiggen.py
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@ -168,6 +168,17 @@ class Embiggen(Generator):
distanceToLR = 255
#Place the pixel as invert of distance
agradientC.putpixel((x, y), round(255 - distanceToLR))
# Create alternative asymmetric diagonal corner to use on "tailing" intersections to prevent hard edges
# Fits for a left-fading gradient on the bottom side and full opacity on the right side.
agradientAsymC = Image.new('L', (256, 256))
for y in range(256):
for x in range(256):
value = round(max(0, x-(255-y)) * (255 / max(1,y)))
#Clamp values
value = max(0, value)
value = min(255, value)
agradientAsymC.putpixel((x, y), value)
# Create alpha layers default fully white
alphaLayerL = Image.new("L", (width, height), 255)
@ -179,6 +190,12 @@ class Embiggen(Generator):
alphaLayerLTC.paste(agradientL, (0, 0))
alphaLayerLTC.paste(agradientT, (0, 0))
alphaLayerLTC.paste(agradientC.resize((overlap_size_x, overlap_size_y)), (0, 0))
# make masks with an asymmetric upper-right corner so when the curved transparent corner of the next tile
# to its right is placed it doesn't reveal a hard trailing semi-transparent edge in the overlapping space
alphaLayerTaC = alphaLayerT.copy()
alphaLayerTaC.paste(agradientAsymC.rotate(270).resize((overlap_size_x, overlap_size_y)), (width - overlap_size_x, 0))
alphaLayerLTaC = alphaLayerLTC.copy()
alphaLayerLTaC.paste(agradientAsymC.rotate(270).resize((overlap_size_x, overlap_size_y)), (width - overlap_size_x, 0))
if embiggen_tiles:
# Individual unconnected sides
@ -382,7 +399,7 @@ class Embiggen(Generator):
elif emb_row_i == emb_tiles_y - 1:
if emb_column_i == 0:
if (tile+1) in embiggen_tiles: # Look-ahead right
intileimage.putalpha(alphaLayerT)
intileimage.putalpha(alphaLayerTaC)
else:
intileimage.putalpha(alphaLayerRTC)
elif emb_column_i == emb_tiles_x - 1:
@ -390,7 +407,7 @@ class Embiggen(Generator):
intileimage.putalpha(alphaLayerLTC)
else:
if (tile+1) in embiggen_tiles: # Look-ahead right
intileimage.putalpha(alphaLayerLTC)
intileimage.putalpha(alphaLayerLTaC)
else:
intileimage.putalpha(alphaLayerABB)
# vertical middle of image
@ -398,7 +415,7 @@ class Embiggen(Generator):
if emb_column_i == 0:
if (tile+1) in embiggen_tiles: # Look-ahead right
if (tile+emb_tiles_x) in embiggen_tiles: # Look-ahead down
intileimage.putalpha(alphaLayerT)
intileimage.putalpha(alphaLayerTaC)
else:
intileimage.putalpha(alphaLayerTB)
elif (tile+emb_tiles_x) in embiggen_tiles: # Look-ahead down only
@ -413,7 +430,7 @@ class Embiggen(Generator):
else:
if (tile+1) in embiggen_tiles: # Look-ahead right
if (tile+emb_tiles_x) in embiggen_tiles: # Look-ahead down
intileimage.putalpha(alphaLayerLTC)
intileimage.putalpha(alphaLayerLTaC)
else:
intileimage.putalpha(alphaLayerABR)
elif (tile+emb_tiles_x) in embiggen_tiles: # Look-ahead down only
@ -425,9 +442,15 @@ class Embiggen(Generator):
if emb_row_i == 0 and emb_column_i >= 1:
intileimage.putalpha(alphaLayerL)
elif emb_row_i >= 1 and emb_column_i == 0:
intileimage.putalpha(alphaLayerT)
if emb_column_i + 1 == emb_tiles_x: # If we don't have anything that can be placed to the right
intileimage.putalpha(alphaLayerT)
else:
intileimage.putalpha(alphaLayerTaC)
else:
intileimage.putalpha(alphaLayerLTC)
if emb_column_i + 1 == emb_tiles_x: # If we don't have anything that can be placed to the right
intileimage.putalpha(alphaLayerLTC)
else:
intileimage.putalpha(alphaLayerLTaC)
# Layer tile onto final image
outputsuperimage.alpha_composite(intileimage, (left, top))
else: