04-19-2012, 12:32 AM | #1 |
Zealot
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Looking for freeware to batch resize images.
I want my images on my E-reader to be re-sized to my e-readers resolution but I need the program to recognize and split double page images as well i.e comics ect.
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04-19-2012, 04:38 AM | #2 |
Evangelist
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Scan Tailor if you want to split them. Maybe you can try outputting a lower DPI than 600... (with a DPI calculator, perhaps?). If you wana use it on comic books, set it to grayscale. In colour they would just take up more space - especially if you're reading it on the current E-Ink technology (which is monochrome).
If lowering the DPI doesn't work, Irfanview can also batch resize. Last edited by DSpider; 04-23-2012 at 06:15 PM. |
04-19-2012, 05:15 AM | #3 | |
Wizard
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Quote:
Imagemagick is the most powerfull commandline image manipulation program. Runs on all platforms: Windows, Linux, BSD, mac, ... |
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04-22-2012, 04:20 PM | #4 | |
Zealot
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Quote:
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04-22-2012, 04:22 PM | #5 |
Zealot
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I couldn't figure this one out at all it only lets me pick from a single image no options or anything either. Maybe I'm missing something but seems like this can only edit single images.
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04-22-2012, 04:38 PM | #6 |
Evangelist
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I said that Scan Tailor can split them. The DPI settings ("Output Resolution") is the final step from Scan Tailor. If using a DPI calculator (link in my previous post) doesn't get you the right resolution for your device, Irfanview can also resize.
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04-22-2012, 04:42 PM | #7 | |
Connoisseur
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04-22-2012, 05:10 PM | #8 |
Zealot
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This program is really useful my only question would be how do I get it to split the pages exactly in half? it keeps putting the split line in odd places.
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04-23-2012, 02:43 AM | #9 |
Evangelist
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It doesn't matter if the divider is exactly in the middle or 50 pixels to the right, as long as it doesn't overlap any part of the text. The pages will receive special treatment later on when you choose the content and set up margins.
Just go through a book, will you? See if you like the result. For comic books you should choose "Color / Grayscale" at the final step. Last edited by DSpider; 04-23-2012 at 06:13 PM. |
04-23-2012, 12:28 PM | #10 | |
Wizard
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Code:
convert escher01.png -quantize GRAY +dither -colors 16 -rotate "-90>" escher01.bmp For description of the convert command see http://www.imagemagick.org/script/convert.php I know it looks crazy, but convert command from Imagemagick package has *huge* number of options. It is like Photoshop you run in "blind" mode. When you have tried an example and you know exactly what you want to do, you take a list of images and use a good text editor to make a program. Either a shell program convert_my_pictures.sh in Unix/Linux or a batch program convert_my_pictures.bat in Windows. You can then let it run and convert thousands of pictures. So, in Windows you have lots of images, like flower.jpg animal.jpg car.jpg kid.jpg and so on. So you make a list of images, by entering a directory with pictures and running command Code:
dir /B > convert_my_pictures.bat Code:
convert flower.jpg -quantize GRAY +dither -colors 16 -rotate "-90>" flower.bmp convert animal.jpg -quantize GRAY +dither -colors 16 -rotate "-90>" animal.bmp convert car.jpg -quantize GRAY +dither -colors 16 -rotate "-90>" car.bmp convert kid.jpg -quantize GRAY +dither -colors 16 -rotate "-90>" car.bmp In Unix/Linux/OSX you might write something like: Code:
#!/bin/bash for f in *.jpg do convert $f -quantize GRAY +dither -colors 16 -rotate "-90>" $f.bmp done If you want something with a nice clicking interface, try this: http://www.xnconvert.com/ xnconvert is a brother of xnview program - a very powerful viewer with lots of options. |
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04-23-2012, 12:58 PM | #11 | |
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