Managing photo TIF files

MW
Posted By
Michael_Walton
Apr 27, 2005
Views
207
Replies
4
Status
Closed
hi – i hope someone can explain to me if i’m doing this right or not.

use a minolta camera and i shoot photos in TIF. then i import them to PS 7. when i look at the image size, their large (1600 pixels) and are at 72 dpi. so then i need to bump them up for print. so what i do is copy the file to a new document, change dpi to 300, and then paste it into the new doc.

but then when i look at the new image, the pixels are fine but the actual print size is very small (1 inch or so).

so then i go back to the camera raw image. i copy it and open up a new doc. when i do this, i change the dpi to 300 and also make the dimensions in inches larger. when i paste it in, the image is smaller. so then i have to free transform it to blow it up.

so far, this technique is working, but i’m wondering if there’s an easier way to do it. i’d appreciate any tips or advice you can give me.

thanks…
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C
chrisjbirchall
Apr 27, 2005
Not overly sure what you mean when you describe your workflow – copy the file… paste it into the new doc… ?

If the TIFFs are coming off the camera at 1600 pixels (long side) changing to 300 ppi (Image>Image_Size with resample image UNchecked) would result in a 5×3" image.

This does not affect the pixels at all, merely tells you what size it would print at 300ppi. If you need it to be larger, you need to upsample by checking the resample box and setting Document Size in inches and the resolution at 300 ppi. Be aware that the bigger you go the more quality will suffer.

If your camera has a RAW mode this will get you the best results. You can set the ppi and size during conversion in the Camera Raw Plug-in.

Hope some of this helps.

Chris.
MW
Michael_Walton
Apr 27, 2005
chris – thanks for getting back with me on this. let me explain exactly how a raw image is set up, and what i need to do with it, and then maybe u can give me some tips.

have an image now in PS. it’s 1600 x 1200 pixels at 72 DPI. document size is 22.2 x 16.6 inches. it’s a RAW TIF image.

it’s of a lady sitting and looking at the camera. there’s a lot of space around her and i only need her head for a head shot. so now what i need to do is draw a box around her face only….to be used for a print newsletter. they want it at 300 DPI.

so after i draw the box around her face only to create a portrait of her, what would you now suggest i do? the final product given to the newsletter people requires it to be RAW TIF at 300 dpi.

thanks…
RW
Rene_Walling
Apr 27, 2005
Simple math:

1600 pixels/72 pixels per inch = 22.2 inches

1600 pixels /300 pixels per inch = 5.33 inches

they want it at 300 DPI.

At what size? ppi on its own is not enough, you need dimension too.

Think of it as miles per hour. If you are driving at 50 mph, how long will it take you to get to my place? You can’ t know unless you also know how far you have to go.
MW
Michael_Walton
Apr 27, 2005
ok i got it. thanks a lot for your help…

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