Out of control page size.

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Jaquick
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Out of control page size.

Postby Jaquick » Fri Feb 24, 2017 7:17 pm

I'm running a Mac (10.11 at work, 10.12 at home, 2.8 GHz Intel Core i5 in both cases) with various all-in-one printer scanners. My best scans have been made by scanning color jp2 @ 600 dpi, then converting to pdf with a black and white filter. Lately, though I've been scanning at normal size, my pages have been coming out 8-10x larger (50"x80" for a 7 x 11 page). The computers are new, and I believe I have used them successfully in the past. I've tried updates of Apple software and scanner drivers. It seems to be an issue in Image Capture. does anyone have any advice?

coulonnus
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Re: Out of control page size.

Postby coulonnus » Sun Feb 26, 2017 6:15 am

Does this prevent you from printing a page on an A4 or letter paper with page scaling="fit to printable area" in Acrobat Reader? Many pdf made by libraries are also too large.

Sallen112
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Re: Out of control page size.

Postby Sallen112 » Mon Feb 27, 2017 7:34 am

Maybe try updating or reinstalling the software for the scanner your using?

coulonnus
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Re: Out of control page size.

Postby coulonnus » Tue Feb 28, 2017 3:56 pm

How do you convert to pdf? If you use the last version of Imagemagick I just learnt this trick: magick yourimage -density %[fx:w/8.26] yourimage.pdf

8.26 is for A4 format. Change it to 8.5 for letter. (desired width in inches)

You can do the monochrome conversion at the same time appending -threshold 50% (or another threshold) to this command.

daphnis
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Re: Out of control page size.

Postby daphnis » Fri Apr 28, 2017 3:49 pm

This is clearly an older thread, but why aren't you scanning natively in 1-bit mode (monochrome)? That's going to give you by far the lowest file size from the get-go.

coulonnus
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Re: Out of control page size.

Postby coulonnus » Fri Apr 28, 2017 4:02 pm

In this context "size" means "paper dimensions". Not file size in kilo or megabytes. :-)

Jaquick
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Re: Out of control page size.

Postby Jaquick » Mon Nov 06, 2017 2:35 am

I found out what this issue was. For some reason Preview defaults to 72 dpi. If I change the resolution to whatever my original scanning dpi was (generally 400), the pages size returns to the original scanned page size.


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