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Image enlargment and printing

Posted on 2006-10-27
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  We enlarge books for the visually impaired.  We have a client who needs 8 1/2 x 11 books enlarged to 17 x 22.  We have decided to print half of the 8 1/2 x 11 on the front of an 11 x 17 and the other half on the back of the 11 x 17.  We have an hp 5si with a duplexer.  

   The ideal situation would be to have a software which does the splitting of the images automatically and then prints them out on both sides of the 11 x 17.  That's not realistic because it wouldn't know where to split between the text.  Instead, we have a software which we use to manually divide the 8 1/2 x 11's into two parts.  

To print the (now two) images onto the two sides of the 11 x 17 we have been using Windows picture and fax viewer which sends them together to the printer and they get duplexed.  The problem is that Windows picture and fax viewer sometimes cuts off parts of one side of the print.  It seems that when the two sides are not close enough in size, Windows uses the same proporting for both sides eventhough it's cutting one off.

What can we do for this.


Thanks, Ed
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Question by:lehman6676
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Expert Comment

by:scrathcyboy
ID: 17824125
The reason for this is that 8.5 x 11, if you rotate it to landscape mode, it does not incrementally enlarge to 11 x 17, so there is not an exact double to 11 x 17.

11 divided by 8.5 == 1.2941 -- however ...

17 divided by 11 ==  1.545454

So they are not in proportion.

If the limiting size is 17 for the temporary enlargement, then you need to factor the 8.5 down by 1.1942 -- this means the 8.5 has to be scaled down by 83.7% to get the right ratio, which = 7.11.

So to get the RIGHT ratio to get up to 17 x 22, you need an original page of 7.11" x 11".

DO your math right according to consistent ratios, and you will see what you need to start with.

 -- it in fact doubles to 17 x 22.  If you calculate this back to 11 x 17, you will see that your original image image needs to be
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LVL 44

Expert Comment

by:scrathcyboy
ID: 17824132
oops, first line, should have said, "there is not an exact double to 17 x 22" - last part of sentence.
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Author Comment

by:lehman6676
ID: 17829979
scrathcyboy,

The picture and fax viewer in Windows automatically resizes and rotates any picture, any size when printing as a fax document.  If I print them on 11 x 17 pages landscape, these images print out as big as possible.  If I print them out on two separate pages, they print fine, albeit not in perfect proportion of the original document.  My issue is that when I am printing them on both sides of the page, the windows picture and fax viewer can't seem to get both sides right when they are significantly different.  Maybe there's another software that can do a similar thing.  I can't seem to find anything that will print separate files on two sides of the same page with auto resize, etc.


Thanks, Ed
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scrathcyboy earned 2000 total points
ID: 17831656
Nah, you cannot rely on windows picture and fax viewer for ANY REGULARITY AT ALL!!!  This program does whatever it wants based on ths size of the image.  There is no consistency or reliability.

If you are depending on this junky chageable software to produce reliability, you are SERIOUSLy kidding yourself.  This program follows NO RULES, and does not produce consistent results.  Get a REAL program instead -- even the FREE IRFANVIEW.EXE (www.irfanview.com) can do 100 times better that this infelicitious program.
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