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Code Issues Releases Wiki Activity

Inter-panel cropping method. (#810)

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* Inter-panel cropping method.

* 1. Save interpanelcrop option.
2. Update readme with the the new interpanelcrop argument.
3. Add a tooltip to the inter-panel crop box.
This commit is contained in:
X5Games / Neyney10
2025-01-27 23:44:23 +02:00
committed by GitHub
parent 4fb993b38b
commit 2f703ef92c
9 changed files with 142 additions and 35 deletions
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2
README.md
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@@ -163,6 +163,8 @@ PROCESSING:
Set cropping power [Default=1.0]
--cm CROPPINGM, --croppingminimum CROPPINGM
Set cropping minimum area ratio [Default=0.0]
--ipc INTERPANELCROP, --interpanelcrop INTERPANELCROP
Crop empty sections. 0: Disabled 1: Horizontally 2: Both [Default=0]
--blackborders Disable autodetection and force black borders
--whiteborders Disable autodetection and force white borders
--forcecolor Don't convert images to grayscale

13
gui/KCC.ui
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@@ -237,6 +237,19 @@
</property>
</widget>
</item>
<item row="6" column="2">
<widget class="QCheckBox" name="interPanelCropBox">
<property name="toolTip">
<string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;Unchecked - Disabled&lt;br/&gt;&lt;/span&gt;Disabled&lt;/p&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;Indeterminate - Horizontal&lt;br/&gt;&lt;/span&gt;Crop empty horizontal lines.&lt;/p&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;Checked - Both&lt;br/&gt;&lt;/span&gt;Crop empty horizontal and vertical lines.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
</property>
<property name="text">
<string>Inter-panel crop</string>
</property>
<property name="tristate">
<bool>true</bool>
</property>
</widget>
</item>
</layout>
</widget>
</item>

2
kindlecomicconverter/KCC_gui.py
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@@ -244,6 +244,7 @@ class WorkerThread(QThread):
options.cropping = GUI.croppingBox.checkState().value
if GUI.croppingBox.checkState() != Qt.CheckState.Unchecked:
options.croppingp = float(GUI.croppingPowerValue)
options.interpanelcrop = GUI.interPanelCropBox.checkState().value
if GUI.borderBox.checkState() == Qt.CheckState.PartiallyChecked:
options.white_borders = True
elif GUI.borderBox.checkState() == Qt.CheckState.Checked:
@@ -789,6 +790,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
'gammaBox': GUI.gammaBox.checkState().value,
'croppingBox': GUI.croppingBox.checkState().value,
'croppingPowerSlider': float(self.croppingPowerValue) * 100,
'interPanelCropBox': GUI.interPanelCropBox.checkState().value,
'upscaleBox': GUI.upscaleBox.checkState().value,
'borderBox': GUI.borderBox.checkState().value,
'webtoonBox': GUI.webtoonBox.checkState().value,

10
kindlecomicconverter/KCC_ui.py
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@@ -138,6 +138,12 @@ class Ui_mainWindow(object):
self.gridLayout_2.addWidget(self.authorEdit, 0, 0, 1, 1)
self.interPanelCropBox = QCheckBox(self.optionWidget)
self.interPanelCropBox.setObjectName(u"interPanelCropBox")
self.interPanelCropBox.setTristate(True)
self.gridLayout_2.addWidget(self.interPanelCropBox, 6, 2, 1, 1)
self.gridLayout.addWidget(self.optionWidget, 5, 0, 1, 2)
@@ -444,6 +450,10 @@ class Ui_mainWindow(object):
self.authorEdit.setToolTip(QCoreApplication.translate("mainWindow", u"Default Author is KCC", None))
#endif // QT_CONFIG(tooltip)
self.authorEdit.setPlaceholderText(QCoreApplication.translate("mainWindow", u"Default Author", None))
#if QT_CONFIG(tooltip)
self.interPanelCropBox.setToolTip(QCoreApplication.translate("mainWindow", u"<html><head/><body><p><span style=\" font-weight:600; text-decoration: underline;\">Unchecked - Disabled<br/></span>Disabled</p><p><span style=\" font-weight:600; text-decoration: underline;\">Indeterminate - Horizontal<br/></span>Crop empty horizontal lines.</p><p><span style=\" font-weight:600; text-decoration: underline;\">Checked - Both<br/></span>Crop empty horizontal and vertical lines.</p></body></html>", None))
#endif // QT_CONFIG(tooltip)
self.interPanelCropBox.setText(QCoreApplication.translate("mainWindow", u"Inter-panel crop", None))
self.gammaLabel.setText(QCoreApplication.translate("mainWindow", u"Gamma: Auto", None))
self.croppingPowerLabel.setText(QCoreApplication.translate("mainWindow", u"Cropping power:", None))
#if QT_CONFIG(tooltip)

4
kindlecomicconverter/comic2ebook.py
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@@ -612,6 +612,8 @@ def imgFileProcessing(work):
img.cropPageNumber(opt.croppingp, opt.croppingm)
if opt.cropping > 0 and not opt.webtoon:
img.cropMargin(opt.croppingp, opt.croppingm)
if opt.interpanelcrop > 0:
img.cropInterPanelEmptySections("horizontal" if opt.interpanelcrop == 1 else "both")
img.autocontrastImage()
img.resizeImage()
if opt.forcepng and not opt.forcecolor:
@@ -1013,6 +1015,8 @@ def makeParser():
help="Set cropping power [Default=1.0]")
processing_options.add_argument("--cm", "--croppingminimum", type=float, dest="croppingm", default="0.0",
help="Set cropping minimum area ratio [Default=0.0]")
processing_options.add_argument("--ipc", "--interpanelcrop", type=int, dest="interpanelcrop", default="0",
help="Crop empty sections. 0: Disabled 1: Horizontally 2: Both [Default=0]")
processing_options.add_argument("--blackborders", action="store_true", dest="black_borders", default=False,
help="Disable autodetection and force black borders")
processing_options.add_argument("--whiteborders", action="store_true", dest="white_borders", default=False,

28
kindlecomicconverter/common_crop.py Normal file
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@@ -0,0 +1,28 @@
def threshold_from_power(power):
return 240-(power*64)
'''
Groups close values together
'''
def group_close_values(vals, max_dist_tolerated):
groups = []
group_start = -1
group_end = 0
for i in range(len(vals)):
dist = vals[i] - group_end
if group_start == -1:
group_start = vals[i]
group_end = vals[i]
elif dist <= max_dist_tolerated:
group_end = vals[i]
else:
groups.append((group_start, group_end))
group_start = -1
group_end = -1
if group_start != -1:
groups.append((group_start, group_end))
return groups

3
kindlecomicconverter/image.py
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@@ -24,6 +24,7 @@ import mozjpeg_lossless_optimization
from PIL import Image, ImageOps, ImageStat, ImageChops, ImageFilter
from .shared import md5Checksum
from .page_number_crop_alg import get_bbox_crop_margin_page_number, get_bbox_crop_margin
from .inter_panel_crop_alg import crop_empty_inter_panel
AUTO_CROP_THRESHOLD = 0.015
@@ -390,6 +391,8 @@ class ComicPage:
if bbox:
self.maybeCrop(bbox, minimum)
def cropInterPanelEmptySections(self, direction):
self.image = crop_empty_inter_panel(self.image, direction, background_color=self.fill)
class Cover:
def __init__(self, source, target, opt, tomeid):

76
kindlecomicconverter/inter_panel_crop_alg.py Normal file
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@@ -0,0 +1,76 @@
from PIL import Image, ImageFilter, ImageOps
import numpy as np
from typing import Literal
from .common_crop import threshold_from_power, group_close_values
'''
Crops inter-panel empty spaces (ignores empty spaces near borders - for that use crop margins).
Parameters:
img (PIL image): A PIL image.
direction (horizontal or vertical or both): To crop rows (horizontal), cols (vertical) or both.
keep (float): Distance to keep between panels after cropping (in percentage relative to the original distance).
background_color (string): 'white' for white background, anything else for black.
Returns:
img (PIL image): A PIL image after cropping empty sections.
'''
def crop_empty_inter_panel(img, direction: Literal["horizontal", "vertical", "both"], keep=0.04, background_color='white'):
img_temp = img
if img.mode != 'L':
img_temp = ImageOps.grayscale(img)
if background_color != 'white':
img_temp = ImageOps.invert(img)
img_mat = np.array(img)
power = 1
img_temp = ImageOps.autocontrast(img_temp, 1).filter(ImageFilter.BoxBlur(1))
img_temp = img_temp.point(lambda p: 255 if p <= threshold_from_power(power) else 0)
if direction in ["horizontal", "both"]:
rows_idx_to_remove = empty_sections(img_temp, keep, horizontal=True)
img_mat = np.delete(img_mat, rows_idx_to_remove, 0)
if direction in ["vertical", "both"]:
cols_idx_to_remove = empty_sections(img_temp, keep, horizontal=False)
img_mat = np.delete(img_mat, cols_idx_to_remove, 1)
return Image.fromarray(img_mat)
'''
Finds empty sections (excluding near borders).
Parameters:
img (PIL image): A PIL image.
keep (float): Distance to keep between panels after cropping (in percentage relative to the original distance).
horizontal (boolean): True to find empty rows, False to find empty columns.
Returns:
Itertable (list or NumPy array): indices of rows or columns to remove.
'''
def empty_sections(img, keep, horizontal=True):
axis = 1 if horizontal else 0
img_mat = np.array(img)
img_mat_max = np.max(img_mat, axis=axis)
img_mat_empty_idx = np.where(img_mat_max == 0)[0]
empty_sections = group_close_values(img_mat_empty_idx, 1)
sections_to_remove = []
for section in empty_sections:
if section[1] < img.size[1] * 0.99 and section[0] > img.size[1] * 0.01: # if not near borders
sections_to_remove.append(section)
if len(sections_to_remove) != 0:
sections_to_remove_after_keep = [(int(x1+(keep/2)*(x2-x1)), int(x2-(keep/2)*(x2-x1))) for x1,x2 in sections_to_remove]
idx_to_remove = np.concatenate([np.arange(x1, x2) for x1,x2 in sections_to_remove_after_keep])
return idx_to_remove
return []

39
kindlecomicconverter/page_number_crop_alg.py
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@@ -1,5 +1,7 @@
from PIL import ImageOps, ImageFilter
import numpy as np
from .common_crop import threshold_from_power, group_close_values
'''
Some assupmptions on the page number sizes
@@ -51,12 +53,11 @@ def get_bbox_crop_margin_page_number(img, power=1, background_color='white'):
threshold = threshold_from_power(power)
bw_img = img.point(lambda p: 255 if p <= threshold else 0)
bw_bbox = bw_img.getbbox()
if not bw_bbox: # bbox cannot be found in case that the entire resulted image is black.
return None
left, top_y_pos, right, bot_y_pos = bw_bbox
'''
We inspect the lower bottom part of the image where we suspect might be a page number.
We assume that page number consist of 1 to 3 digits and the total min and max size of the number
@@ -73,7 +74,7 @@ def get_bbox_crop_margin_page_number(img, power=1, background_color='white'):
img_part_mat = np.array(img_part)
window_groups = []
for i in range(img_part.size[1]):
row_groups = [(g[0], g[1], i, i) for g in group_pixels(img_part_mat[i], img.size[0]*max_dist_size[0], threshold)]
row_groups = [(g[0], g[1], i, i) for g in group_close_values(np.where(img_part_mat[i] <= threshold)[0], img.size[0]*max_dist_size[0])]
window_groups.extend(row_groups)
window_groups = np.array(window_groups)
@@ -109,7 +110,6 @@ def get_bbox_crop_margin_page_number(img, power=1, background_color='white'):
cropped_bbox = (0, 0, img.size[0], bot_y_pos-(window_h-boxes_in_same_y_range[0][2]+1))
cropped_bbox = bw_img.crop(cropped_bbox).getbbox()
return cropped_bbox
@@ -145,33 +145,6 @@ def get_bbox_crop_margin(img, power=1, background_color='white'):
return bw_img.getbbox()
'''
Groups close pixels together (x axis)
'''
def group_pixels(row, max_dist_tolerated, threshold):
groups = []
idx = np.where(row <= threshold)[0]
group_start = -1
group_end = 0
for i in range(len(idx)):
dist = idx[i] - group_end
if group_start == -1:
group_start = idx[i]
group_end = idx[i]
elif dist <= max_dist_tolerated:
group_end = idx[i]
else:
groups.append((group_start, group_end))
group_start = -1
group_end = -1
if group_start != -1:
groups.append((group_start, group_end))
return groups
def box_intersect(box1, box2, max_dist):
return not (box2[0]-max_dist[0] > box1[1]
or box2[1]+max_dist[0] < box1[0]
@@ -209,7 +182,3 @@ def merge_boxes(boxes, max_dist_tolerated):
else:
j += 1
return boxes
def threshold_from_power(power):
return 240-(power*64)