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Author Topic: PPI and DPI  (Read 1087 times) Average Rating: 0
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Gebre Menfes Kidus
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« on: June 15, 2010, 07:45:59 PM »

I have ten pictures that will be in my book, but the publishing company tells me that the images I submit must be at least 300 dpi/ppi ( Huh).  The images I have on my computer are 120 dpi, and I can't figure out how to change them to 300 dpi. Can anyone help me?


Thanks.


Selam
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« Reply #1 on: June 15, 2010, 08:30:19 PM »

"Photoshop Resize Images" tutorial
http://www.youtube.com/watch?v=omc-UB_wa3E
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LizaSymonenko
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« Reply #2 on: June 15, 2010, 08:47:38 PM »


Do you have Photoshop?

If so, it's VERY easy.

Open your image.  Click Image > Image Size and the "Image Size" dialog box will appear with pixel and document information. In the "Document Size" section change the number in "Resolution" to 300 and choose pixel/inch from the "Resolution" drop-down menu.


Verify that "Resample Image" is not selected and click OK. You have changed the resolution to 300 DPI without changing other picture attributes, such as the size.

Let me know if I can help.

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« Reply #3 on: June 15, 2010, 09:26:22 PM »

If you don't have Photoshop, you can use XnView.
Open the picture within it, click Image, then Resize.  Make sure 'Keep Ratio' is checked, and that 'Resample' is unchecked.  Under 'Print Size', 'Units' should be set to 300 and the drop down menu beside it to 'pixels/inch'.  Click 'Ok'.  Now just a matter of saving and repeating.  Smiley

Or, you could use this Batch Resizer.
When you download the file, rename it to "PhotoResizeD300Q100.exe".  Now, don't run the file.  Highlight all the photos you want to convert, then click and drag that selection over the icon of the downloaded file and then release your mouse.  An automated terminal window will open up and list off the conversions.  The converted photos should now be in the same folder of the originals.
« Last Edit: June 15, 2010, 09:49:53 PM by Nebelpfade » Logged

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Gebre Menfes Kidus
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« Reply #4 on: June 15, 2010, 10:28:41 PM »

OK, thanks guys. But I'm still having trouble because I can't figure out how to download and use photoshop, XnView, or BatchResizer. I have Adobe Reader but apparently no photoshop. I tried the free downloads for the programs mentioned, but I'm still doing something wrong. Please give me simple step by step directions, as I am very computer illiterate and easily frustrated. Embarrassed


Thanks for your patience with me. I really need the help.


Selam
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« Reply #5 on: June 15, 2010, 11:25:55 PM »

For XnView:
1)  Open the programme.
2)  Click File, Open, find the photo you wish you change, click Open.  (You should now be looking at your photo)
3)  Click Image, the click Resize.
4)  Under the Print Size header, change Units from 120 to 300.
5)  Make sure that Keep ratio is checked, and make sure that Resample is unchecked.  Click OK.
6)  The photo should not look any different, but the DPI has been changed.
7)  Click File, the Save As (usually wise to leave the original unaltered).
8)  Repeat 2 - 7 until done.
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« Reply #6 on: June 18, 2010, 03:22:08 AM »

Did you end up being able to get it to work?
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Gebre Menfes Kidus
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« Reply #7 on: June 18, 2010, 03:39:41 AM »

Did you end up being able to get it to work?


Thank you so much for your help. I wasn't able to figure it out, but our dear friend Liza was kind enough to fix the images for me herself. When I have time, I'll try to revisit the procedure and learn how to do it myself. Thanks again for trying to help me.


Selam
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"There are two great tragedies: one is to live a life ruled by the passions, and the other is to live a passionless life."
Selam, +GMK+
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