CBZ -> PDF How to set image resolution

jpl98 · 05-24-2011, 11:14 PM

Hi,
I tried Calibre to put old Comics in CBZ format on an iPad
but image resolution of the resulting PDF is very bad compared with the original.
It seems because the plugin is translating for a small portable device,
but size of the document is not my concern.
Is it possible to set this image resolution ?
Thanks
JPL

user_none · 05-25-2011, 07:27 AM

You can A) Set the output profile to the profile for your device. This will cause the image to be resized for the device's screen size. B) In Input Options under comic input fiddle with the settings. One setting is to set a specific size. You can also disable image processing on comics completely there.

jpl98 · 05-26-2011, 07:07 AM

Thanks for your help.
I disabled image processing for comics as proposed, and set ouput profile to generic tablet (don't resize images), but strangely image size in the resulting PDF is about 10% smaller than the CBZ.
And the weight of the PDF is nearly double those of the CBZ (46 Mo vs 23 Mo), while conversion with Adobe Acrobat (function Combine files in one PDF) produce a 27 Mo file.
Do I make something wrong*?

Anyway I tried Calibre first time one year ago and I'm impressed by the improvements of this soft.
JPL

05-24-2011, 11:14 PM	#1
jpl98 Junior Member Posts: 2 Karma: 10 Join Date: May 2011 Device: ipad	CBZ -> PDF How to set image resolution Hi, I tried Calibre to put old Comics in CBZ format on an iPad but image resolution of the resulting PDF is very bad compared with the original. It seems because the plugin is translating for a small portable device, but size of the document is not my concern. Is it possible to set this image resolution ? Thanks JPL

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05-25-2011, 07:27 AM	#2
user_none Sigil & calibre developer Posts: 2,487 Karma: 1063785 Join Date: Jan 2009 Location: Florida, USA Device: Nook STR	You can A) Set the output profile to the profile for your device. This will cause the image to be resized for the device's screen size. B) In Input Options under comic input fiddle with the settings. One setting is to set a specific size. You can also disable image processing on comics completely there.

05-26-2011, 07:07 AM	#3
jpl98 Junior Member Posts: 2 Karma: 10 Join Date: May 2011 Device: ipad	Thanks for your help. I disabled image processing for comics as proposed, and set ouput profile to generic tablet (don't resize images), but strangely image size in the resulting PDF is about 10% smaller than the CBZ. And the weight of the PDF is nearly double those of the CBZ (46 Mo vs 23 Mo), while conversion with Adobe Acrobat (function Combine files in one PDF) produce a 27 Mo file. Do I make something wrong*? Anyway I tried Calibre first time one year ago and I'm impressed by the improvements of this soft. JPL

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