Search found 4 matches

by iaw4
2011-10-23T09:55:01-07:00
Forum: Users
Topic: change all pixels of one color to another?
Replies: 3
Views: 9818

Re: change all pixels of one color to another?

thanks. this may work...but when it expanded my 3MB pdf file to 100MB, I decided to skip it.

regards,

/iaw
by iaw4
2011-10-22T20:15:52-07:00
Forum: Users
Topic: change all pixels of one color to another?
Replies: 3
Views: 9818

change all pixels of one color to another?

(OSX or ubuntu, current IM.) probably a common novice question, but a search here did not give me the answer. I have a pdf file (in cmyk). I first convert it into a png file. this part is easy with ghostscript. something like # gs -dBATCH -dNOPAUSE -sDEVICE=png16m -dTextAlphasBits=4 ...
by iaw4
2010-10-16T10:56:09-07:00
Forum: Users
Topic: intelligent pdf resize?
Replies: 2
Views: 7981

intelligent pdf resize?

I have a multipage pdf file, which I want to shrink from 8.25 x 11 to 8 x 10. (createspace does not know about letter paper. grrrr...). presumably, mogrify -resize 90% file.pdf unfortunately, after some warnings that OSX Quartz screwed up some stuff ( **** Warning: considering '0000000000 00000 n ...
by iaw4
2010-08-01T07:16:24-07:00
Forum: Users
Topic: rescale-shrink and keep pixels
Replies: 1
Views: 3339

rescale-shrink and keep pixels

Let's say I have a document that is 10cm x 10cm at 72dpi. I want to shrink it to 5cm x 5cm at 144dpi. Later, if I want to scale it back up to 10cm x 10cm at 72dpi, I should not have lost any pixels.

how would I do this? advice appreciated.

/iaw4