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upsizing a photo and scanning help please

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catz

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I have a 5x7 8mp picture that I would like to size up to an 8x10 but don't know the correct way to do it in PS. I have CS2. I have to scan it first though.

What is the best way to acheive this so that it will look as good a quality as the 5x7? Should I increase at small increments at a time? If you know of any tuts, that would be fine too.

Thanks so much!
--
-Melissa-



Melissa - aka Catz
PBASE Supporter
Proud owner of a Nikon D2X
Still use the Fuji S2 for backup
CanonAE-1 Canon S3
http://www.pbase.com/mnewco
http://www.atncentral.com
 
Hi catz,

yes, increase your image by 10% at a time and make sure Resample Image is tuned on. Take a few passes with this "increase-by-10%" technique by Scott Kelby in his 'the Photoshop book for Digital Photographers. You can create your own custome Action to do it.

Hope this helps.

ciao
--
'One of these days is none of these days'
Canon 20D
Lens 70-200 f4 L
 
I'm a little confused, when you say you have a 5x7 8MP picture, it sounds as if you already have a digital file, but then you said you'll have to scan it (which sounds like you have a 5x7 print that needs to be scanned).

If you have a 5x7 print that you need to scan, read on.

If you're going to fit the 8x10 aspect inside the 5x7 you'll be cropping a bit off the ends (viewing the 5x7 horizontally), if you were looking to print the 8x10 at 300 ppi you'd like to get the 5x7 scanned such that the '5' dimension had the right amount of pixels for the '8' dimension of the 8x10, if you scan the 5x7 at 480 ppi (300*8/5), you'll be able to crop the scan at the 8x10 aspect without any need for sampling (assuming you only crop off at the ends).

Your 5x7 scanned at 480 ppi will generate a file 2400x3360 pixels, the 8x10 you desire at 300 ppi requires 2400x3000 pixels, once you have the file scanned, open it in PS, click on the rectangular marquee tool and set the aspect ratio to 10:8 (talking about a horizontal 5x7), start at the top left and drag down to the bottom right, move the selection to the desired placement and then crop. Check the image size to be sure the cropped image is 2400x3000, if it isn't, undo/redo the crop or sample the image slightly to get it to the exact size (it shouldn't be too far off).

Patrick
--
http://www.pbase.com/patrick_c/leaves
 
5"x7" image that has 8 M pixels it aspect ratio is 5:7
you want to pint an 8"x10" image
different Aspect Ratio 4:5 the image needs to be cropped

5DPI*7DPI=8000K
35DPIsq=8000*1024
35DPIsq=8192000pixels
DPIsq=234057.142
DPI=483.79
so your 8MP 5:7 Aspect ratio image has
2419 x 3387 pixels
without resampling that image the image will print
5" x 7" at 483 DPI
8" x 11 at 302 DPI
10" x 14" at 242 DPI
12" x 17" at 200 DPI

For an 8"x10" print resize that image use Photoshop menu Image> Image Size un-check resample set width to 8" Photoshop will set height to 11.x

Then select the rectangle marquee tool use the option bar set fixed size 8" x 10"
Click on image use arrow keys to position the selection your want.
You may want to crop off the top or bottom or a little off both top and bottom.
Then menu Image> Crop
The image is now set to print 8"x10 at 302 DPI
--
JJMack
 
If your photo is 8Mb, i suppose it doesn't need to be upsized (making more pixels) at all.

Al you have to do is tell the printing program/person to print it that size. Alternately you can adjust the PPI-setting to get a larger photo (yes, and cropping for the ratio).

If you DO want to make more pixels PS can do that quite well (i use Image » size for that). You should try, but the several times some 110% usually is better than one big step seems still to be true.

I've seen results form 's-spline' that are better than what I archieve with PS though.

--
All in my humble opionion of course!

(I might get a preposition wrong -or any other word for that matter-. English is a nice language, but it's not mine)
 
How would I increase by 10 percent. When I look under image> image size it only lets you increase by either size of pixels. I don't see anywhere where I get type in percentage wise. How do I do this? Do I need to caluculate by muliplying the size by 10 percent and increase it that way?

Thanks,

Melissa
noryuen said:
Hi catz,
yes, increase your image by 10% at a time and make sure Resample
Image is tuned on. Take a few passes with this "increase-by-10%"
technique by Scott Kelby in his 'the Photoshop book for Digital
Photographers. You can create your own custome Action to do it.

Hope this helps.

ciao
--
'One of these days is none of these days'
Canon 20D
Lens 70-200 f4 L
Click to expand...
--
-Melissa-



Melissa - aka Catz
PBASE Supporter
Proud owner of a Nikon D2X
Still use the Fuji S2 for backup
CanonAE-1 Canon S3
http://www.pbase.com/mnewco
http://www.atncentral.com
 
Patrick_C said:
I'm a little confused, when you say you have a 5x7 8MP picture, it
sounds as if you already have a digital file, but then you said
you'll have to scan it (which sounds like you have a 5x7 print that
needs to be scanned).
Click to expand...
Thanks Patrick, I didn't mean to confuse anyone. I have a 5x7 photo that was taken with a digital camera and I want to resize it to at least an 8x10 and some wallets.
Patrick_C said:
If you have a 5x7 print that you need to scan, read on.

If you're going to fit the 8x10 aspect inside the 5x7 you'll be
cropping a bit off the ends (viewing the 5x7 horizontally), if you
were looking to print the 8x10 at 300 ppi you'd like to get the 5x7
scanned such that the '5' dimension had the right amount of pixels
for the '8' dimension of the 8x10, if you scan the 5x7 at 480 ppi
(300*8/5), you'll be able to crop the scan at the 8x10 aspect without
any need for sampling (assuming you only crop off at the ends).
Click to expand...
So should I set the scanning settings to 480 dpi instead of 300?
Patrick_C said:
Your 5x7 scanned at 480 ppi will generate a file 2400x3360 pixels,
the 8x10 you desire at 300 ppi requires 2400x3000 pixels, once you
have the file scanned, open it in PS, click on the rectangular
marquee tool and set the aspect ratio to 10:8 (talking about a
horizontal 5x7),
Click to expand...
How do I set the ratio 10:8 in PS?

start at the top left and drag down to the bottom
Patrick_C said:
right, move the selection to the desired placement and then crop.
Check the image size to be sure the cropped image is 2400x3000, if it
isn't, undo/redo the crop or sample the image slightly to get it to
the exact size (it shouldn't be too far off).
Click to expand...
Is there a way to check the size without having to go under image> image size everytime?

Many thanks Patrick,

Melissa
Patrick_C said:
--
http://www.pbase.com/patrick_c/leaves
Click to expand...
--
-Melissa-



Melissa - aka Catz
PBASE Supporter
Proud owner of a Nikon D2X
Still use the Fuji S2 for backup
CanonAE-1 Canon S3
http://www.pbase.com/mnewco
http://www.atncentral.com
 
JJ,

I followed your instructions and when I checked the size it came out to 6.828 x 9x6. I don't understand why except that the 5x7 had a border around it and I am thinking that the border must be at least an inch to lose that much on the sides.

How should I handle this so I can get the picture to an 8x10? Would I crop the border off first before setting the image size?

Thanks,
--
-Melissa-



Melissa - aka Catz
PBASE Supporter
Proud owner of a Nikon D2X
Still use the Fuji S2 for backup
CanonAE-1 Canon S3
http://www.pbase.com/mnewco
http://www.atncentral.com
 
Hope this does not confuse you too much but there is strong evidence that printing in multiples of the printers native resolution helps produce better prints.

For Canon and HP that is 300 ppi and for Epson it is 360 ppi. So if you are resizing it would pay to think about those numbers.

My print quality on my Epson 3800 is better when I adopt this practice.

Brian
 
Scanning the 5x7 photo at 480 will allow you to crop the image produced by the scan so that you can get an 8x10 @ 300 ppi (without having to resample).

Yes, set the scanner at 480 ppi. Refferring to a horizontal 5x7, setting the resolution to 480 will get you all of the image in the vertical axis while cropping off some at the horizontal/end(s).

Setting to 480 is the theoretical value, I have seen some scanners that need to be scanned slightly higher and then down-sampled to get the best results. You'll just have to give it a try with the scanner you're using.

If you were comfortable with the Image Size dialog, you could set the scanning resolution higher than 480, crop to an 8x10 aspect ratio, then re-sample to get it to 8x10 @ 300 ppi.

When you select the rectangular marquee there is a drop down that will constrain the selection to either a fixed size, certain aspect, or normal (with no constraints). I'm not in front of my Mac right now so I'm going by memory.

If you have the Info palette open you can see the pixel dimensions, but I always check the Image Size dialog.

I definitely wouldn't suggest scanning the 5x7 print if you have access to the original digital file though.

Patrick
--
http://www.pbase.com/patrick_c/leaves
 
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