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Code Issues Releases Wiki Activity

Crop images within 3% of device aspect ratio (#495)

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* Crop images within 3% of device aspect ratio

* use pad instead of expand+fit

* reafactor threshold check

* remove default val
This commit is contained in:
Alex Xu
2023-05-14 09:34:11 -07:00
committed by GitHub
parent 0193bcd00a
commit 37200bdca0
1 changed files with 25 additions and 22 deletions
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45
kindlecomicconverter/image.py
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@@ -24,6 +24,13 @@ import mozjpeg_lossless_optimization
from PIL import Image, ImageOps, ImageStat, ImageChops, ImageFilter
from .shared import md5Checksum
# 0.045 was determined by
# 1200 / 824 = 1.456 (Kindle DX resolution)
# 2250 / 1500 = 1.5 (Typical manga page resolution)
# 1.5 - 1.456 < 0.045
# 0.045 / 1.5 = 0.03 (So maximum 3% of is cropped)
AUTO_CROP_THRESHOLD = 0.045
class ProfileData:
def __init__(self):
@@ -306,36 +313,32 @@ class ComicPage:
self.image = self.image.quantize(palette=palImg)
def resizeImage(self):
if self.image.size[0] <= self.size[0] and self.image.size[1] <= self.size[1]:
method = Image.Resampling.BICUBIC
else:
method = Image.Resampling.LANCZOS
ratio_device = float(self.size[1]) / float(self.size[0])
ratio_image = float(self.image.size[1]) / float(self.image.size[0])
method = self.resize_method()
if self.opt.stretch:
# if self.opt.stretch or (self.opt.kfx and ('-KCC-B' in self.targetPath or '-KCC-C' in self.targetPath)):
self.image = self.image.resize(self.size, method)
elif self.image.size[0] <= self.size[0] and self.image.size[1] <= self.size[1] and not self.opt.upscale:
elif method == Image.Resampling.BICUBIC and not self.opt.upscale:
if self.opt.format == 'CBZ' or self.opt.kfx:
borderw = int((self.size[0] - self.image.size[0]) / 2)
borderh = int((self.size[1] - self.image.size[1]) / 2)
self.image = ImageOps.expand(self.image, border=(borderw, borderh), fill=self.fill)
if self.image.size[0] != self.size[0] or self.image.size[1] != self.size[1]:
self.image = ImageOps.fit(self.image, self.size, method=Image.Resampling.BICUBIC, centering=(0.5, 0.5))
self.image = ImageOps.fit(self.image, self.size, method=method)
else: # if image bigger than device resolution or smaller with upscaling
if abs(ratio_image - ratio_device) < AUTO_CROP_THRESHOLD:
self.image = ImageOps.fit(self.image, self.size, method=method)
elif self.opt.format == 'CBZ' or self.opt.kfx:
self.image = ImageOps.pad(self.image, self.size, method=method, color=self.fill)
else:
if self.opt.format == 'CBZ' or self.opt.kfx:
ratioDev = float(self.size[0]) / float(self.size[1])
if (float(self.image.size[0]) / float(self.image.size[1])) < ratioDev:
diff = int(self.image.size[1] * ratioDev) - self.image.size[0]
self.image = ImageOps.expand(self.image, border=(int(diff / 2), 0), fill=self.fill)
elif (float(self.image.size[0]) / float(self.image.size[1])) > ratioDev:
diff = int(self.image.size[0] / ratioDev) - self.image.size[1]
self.image = ImageOps.expand(self.image, border=(0, int(diff / 2)), fill=self.fill)
self.image = ImageOps.fit(self.image, self.size, method=method, centering=(0.5, 0.5))
self.image = ImageOps.contain(self.image, self.size, method=method)
def resize_method(self):
if self.image.size[0] <= self.size[0] and self.image.size[1] <= self.size[1]:
method = Image.Resampling.BICUBIC
else:
hpercent = self.size[1] / float(self.image.size[1])
wsize = int((float(self.image.size[0]) * float(hpercent)))
self.image = self.image.resize((wsize, self.size[1]), method)
if self.image.size[0] > self.size[0] or self.image.size[1] > self.size[1]:
self.image.thumbnail(self.size, Image.Resampling.LANCZOS)
method = Image.Resampling.LANCZOS
return method
def getBoundingBox(self, tmptmg):
min_margin = [int(0.005 * i + 0.5) for i in tmptmg.size]