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Code Issues Releases Wiki Activity

Added option to disable dithering

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This commit is contained in:
Paweł Jastrzębski
2013-03-05 22:31:26 +01:00
parent f1b63420f6
commit b162425e52
2 changed files with 10 additions and 5 deletions
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5
kcc/comic2ebook.py
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@@ -257,7 +257,8 @@ def applyImgOptimization(img, isSplit=False, toRight=False):
if options.cutpagenumbers:
img.cutPageNumber()
img.resizeImage(options.upscale, options.stretch, options.black_borders, isSplit, toRight)
img.quantizeImage()
if not options.notquantize:
img.quantizeImage()
def dirImgProcess(path):
@@ -401,6 +402,8 @@ def main(argv=None):
help="Do not apply image preprocessing (page splitting and optimizations) [default=True]")
parser.add_option("--gamma", type="float", dest="gamma", default=2.2,
help="Apply gamma correction to linearize the image [default=2.2]")
parser.add_option("--nodithering", action="store_true", dest="notquantize", default=False,
help="Disable image quantization [default=False]")
parser.add_option("--upscale-images", action="store_true", dest="upscale", default=False,
help="Resize images smaller than device's resolution [default=False]")
parser.add_option("--stretch-images", action="store_true", dest="stretch", default=False,

10
kcc/image.py
View File

@@ -115,15 +115,17 @@ class ComicPage:
filename = os.path.basename(self.origFileName)
try:
self.image = self.image.convert('L') # convert to grayscale
os.remove(os.path.join(targetdir,filename)) # remove original file, copied by copytree() in comic2ebook.py
# self.image.save(os.path.join(targetdir, filename), "JPEG")
self.image.save(os.path.join(targetdir, os.path.splitext(filename)[0] + ".png"), "PNG") # quantized images don't like JPEG
os.remove(os.path.join(targetdir,filename))
if options.notquantize:
self.image.save(os.path.join(targetdir, os.path.splitext(filename)[0] + ".jpg"), "JPEG")
else:
self.image.save(os.path.join(targetdir, os.path.splitext(filename)[0] + ".png"), "PNG")
except IOError as e:
raise RuntimeError('Cannot write image in directory %s: %s' % (targetdir, e))
def optimizeImage(self, gamma):
self.image = ImageOps.autocontrast(Image.eval(self.image, lambda a: 255*(a/255.)**gamma))
# self.image = ImageOps.autocontrast(self.image)
def quantizeImage(self):
colors = len(self.palette) / 3