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Merge pull request #1619 from emcmanus/patch-1

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Retain alpha in `pil_resize` for `--alpha_mask`
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Kohya S.
2024-09-20 22:24:49 +09:00
committed by GitHub
parent 583d4a436c de4bb657b0
commit 95ff9dba0c
1 changed files with 11 additions and 4 deletions
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15
library/utils.py
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@@ -305,13 +305,20 @@ class MemoryEfficientSafeOpen:
raise ValueError(f"Unsupported float8 type: {dtype_str} (upgrade PyTorch to support float8 types)")
def pil_resize(image, size, interpolation=Image.LANCZOS):
pil_image = Image.fromarray(cv2.cvtColor(image, cv2.COLOR_BGR2RGB))
has_alpha = image.shape[2] == 4 if len(image.shape) == 3 else False
if has_alpha:
pil_image = Image.fromarray(cv2.cvtColor(image, cv2.COLOR_BGRA2RGBA))
else:
pil_image = Image.fromarray(cv2.cvtColor(image, cv2.COLOR_BGR2RGB))
# use Pillow resize
resized_pil = pil_image.resize(size, interpolation)
# return cv2 image
resized_cv2 = cv2.cvtColor(np.array(resized_pil), cv2.COLOR_RGB2BGR)
# Convert back to cv2 format
if has_alpha:
resized_cv2 = cv2.cvtColor(np.array(resized_pil), cv2.COLOR_RGBA2BGRA)
else:
resized_cv2 = cv2.cvtColor(np.array(resized_pil), cv2.COLOR_RGB2BGR)
return resized_cv2