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Code Issues Releases Wiki Activity

webtoon avoid tiny panels (#1122)

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This commit is contained in:
Alex Xu
2025-10-17 14:06:36 -07:00
committed by GitHub
parent 1da06b43e2
commit ee8fc77ca9
1 changed files with 14 additions and 6 deletions
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20
kindlecomicconverter/comic2panel.py
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@@ -102,6 +102,7 @@ def splitImage(work):
Image.warnings.simplefilter('error', Image.DecompressionBombWarning) Image.warnings.simplefilter('error', Image.DecompressionBombWarning)
Image.MAX_IMAGE_PIXELS = 1000000000 Image.MAX_IMAGE_PIXELS = 1000000000
imgOrg = Image.open(filePath).convert('RGB') imgOrg = Image.open(filePath).convert('RGB')
# I experimented with custom vertical edge kernel [-1, 2, -1] but got poor results
imgEdges = Image.open(filePath).convert('L').filter(ImageFilter.FIND_EDGES) imgEdges = Image.open(filePath).convert('L').filter(ImageFilter.FIND_EDGES)
# threshold of 8 is too high. 5 is too low. # threshold of 8 is too high. 5 is too low.
imgProcess = imgEdges.point(lambda p: 255 if p > 6 else 0).convert('1', dither=Dither.NONE) imgProcess = imgEdges.point(lambda p: 255 if p > 6 else 0).convert('1', dither=Dither.NONE)
@@ -116,23 +117,30 @@ def splitImage(work):
yWork = 0 yWork = 0
panelDetected = False panelDetected = False
panels = [] panels = []
# check git history for how these constant values changed
h_pad = int(widthImg / 20)
v_pad = int(widthImg / 80)
if v_pad % 2:
v_pad += 1
while yWork < heightImg: while yWork < heightImg:
edge = int(widthImg * .05) tmpImg = imgProcess.crop((h_pad, yWork, widthImg - h_pad, yWork + v_pad))
tmpImg = imgProcess.crop((edge, yWork, widthImg-edge, yWork + 4))
solid = detectSolid(tmpImg) solid = detectSolid(tmpImg)
if not solid and not panelDetected: if not solid and not panelDetected:
panelDetected = True panelDetected = True
panelY1 = yWork - 2 panelY1 = yWork
if heightImg - yWork <= 5: if heightImg - yWork <= (v_pad // 2):
if not solid and panelDetected: if not solid and panelDetected:
panelY2 = heightImg panelY2 = heightImg
panelDetected = False panelDetected = False
panels.append((panelY1, panelY2, panelY2 - panelY1)) panels.append((panelY1, panelY2, panelY2 - panelY1))
if solid and panelDetected: if solid and panelDetected:
panelDetected = False panelDetected = False
panelY2 = yWork + 6 panelY2 = yWork
# skip short panel at start
if not panels and panelY2 - panelY1 < v_pad * 2:
continue
panels.append((panelY1, panelY2, panelY2 - panelY1)) panels.append((panelY1, panelY2, panelY2 - panelY1))
yWork += 5 yWork += v_pad // 2
# Split too big panels # Split too big panels
panelsProcessed = [] panelsProcessed = []