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Estimate sharpness #185

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Merged
vladtcvs merged 2 commits into from
Nov 25, 2024
Merged

Estimate sharpness #185

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4a67226
Fix estimation of sharpness
vladtcvs Nov 25, 2024
53a6d28
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vladtcvs Nov 25, 2024
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6 changes: 2 additions & 4 deletions src/vstarstack/tool/image_processing/drop_unsharp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,23 +31,21 @@ class EstimationMethod(Enum):
LAPLACE = 1

def measure_sharpness_sobel(img : np.ndarray, mask : np.ndarray | None) -> float:
if mask is not None:
img = img * mask
sx = scipy.ndimage.sobel(img, axis=0, mode='constant')
sy = scipy.ndimage.sobel(img, axis=1, mode='constant')
sobel = np.sqrt(sx**2 + sy**2)
if mask is not None:
sobel = sobel * mask
img = img * mask
metric = np.sum(sobel)
summ = np.sum(img)
return metric / summ

def measure_sharpness_laplace(img : np.ndarray, mask : np.ndarray | None) -> float:
if mask is not None:
img = img * mask
laplace = cv2.Laplacian(img, cv2.CV_64F).var()
if mask is not None:
laplace = laplace * mask
img = img * mask
metric = np.sum(laplace)
summ = np.sum(img)
return metric / summ
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