Resizing a 35mm scanned photo to 5x7
Posted 10 July 2005 - 07:36 AM
The current image size is
Pixel Dimension 1.42m
Width 500 pixels
Length 996 pixels
Width 6.944 Inches
Height 13.833 Inches
Thanks for your help
Posted 10 July 2005 - 10:27 AM
Work from a tiff if you can and not a jpg. Use a copy of the scan and not the original and do any cropping and other editing you want done on the image.
Now, a 35mm slide has an aspect ratio of 1:1.5 -- that is, the long side is 1.5 times the short side. Perfect for a 4x6 but not for a 5x7.
We can also assume that any cropping you've done has changed the aspect ratio a bit (or alot).
A 5x7 print has an aspect ratio of 1:1.4 (smaller than a 4x6) so you either need to crop off some image, or you need to increase the white space on the image. Your 35mm scan is almost 12% too big to fit into that 1:1.4 frame of a 5x7. I know, it sounds odd that a 4x6 won't fit into a 5x7 but it really won't...
Go to image - canvas size and increase the canvas size 12% all around. That will set a white border around your image without redusing the size of your image.
Now use the crop tool (not the marque tool) to crop your image with the print size set to 5x7 and crop. "Save as" a new file with 5x7 at the end of the file name...
You now have an image ready to print at 5x7 -- check it at view - print size to make sure there is no quality problem. Then check view - actual pixels and see if there is anything you want to correct.
Posted 15 July 2005 - 09:03 AM
I'm trying to see how the 5x7 crop tool will increase the canvas on an image but I'm not seeing it. What I'm finding is that if you're enlarging a 4x6 to 5x7 this crop tool might work (it's not really cropping, it's enlarging) but taking a larger image that doesn't share the 1:1.4 aspect ratio of a 5x7 results in loss of some image space.
Here's what I'm working with...
first smaller aspect image to larger aspect canvas...
I created a new image and I made it 7.5 x 9 inches and filled it red (a big red rectangle). I put an oustide border line around it to make sure I can see the edges. It now has an aspect ratio of 1:1.2 -- I want to print it at 5x7 (aspect 1:1.4) and not drop any image away.
If I go to image - image size, I find that it is actually 7.5x9. If I reduce the 7.5 side to 5 inches in image size, my long side is now 6 inches. It will indeed now fit in a 5x7 frame -- but I have no control of the placement in that frame.
If I use the crop tool and set it to 5x7, I must crop part of the image side off the original image. This won't work.
If I use the marquee tool and set it to an aspect ratio of 1:1.4, I must crop part of the original as well. This won't work.
If I increase canvas by 17% all around -- the difference between 1.2 and 1.4 -- I get a nice white border but the 5x7 crop tool works but I have a white border on top and bottom (not sides) when I crop it. This works but doesn't produce an effect I like...
If I increase canvas size by 17% (height only - add to bottom), I get a nice white border at the bottom. The crop tool lets me select the entire canvas at perfect 5x7 print size. This results in the crop below. I can write something in the white space and it looks pretty cool.
Number of downloads: 11
Posted 15 July 2005 - 09:07 AM
In these two examples... there has been no imagae loss through cropping and the result is professional looking. I have taken an image with an aspect ratio of 1:1.2 and put it in a canvas with an aspect ratio of 1:1.4
Number of downloads: 6
Posted 15 July 2005 - 09:18 AM
The same experiment but this time with an image that is 7.5 x 11.25 (an aspect ratio of 1:1.5) going into a 5x7 (1:1.4)
My orginal image is 7.5 x 11.25 and if I change the 11.25 side to 7" in image - image size, I get an image of 4.667 x 7 --- close, but not a 5x7.
Using the 5x7 crop tool or the marquee tool set at 1:1.4 I get the same result as the above experiment but now the image crops on the bottom/top instead of the sides....
If I increase canvas size by 8% (difference between 1.4 and 1.5), I get a nice white border all around the image. I can crop to 5x7 but now get a white border on the two sides and drop the border on the top and bottom.
If I make that crop (dropping the white border on top and bottom) and then increase canvas size by 5% all around. I get a nice white (shaded for clarity) border all around the image and it will now crop at a perfect 5x7.
The result is:
Number of downloads: 10
Posted 15 July 2005 - 09:25 AM
With a vertical (portrait) image that has an aspect ratio larger than the required canvas, I'm compelled to increase white space all around.
Number of downloads: 6
Posted 15 July 2005 - 09:39 AM
If I increase the canvas width by the difference in short side as a percentage (5/4= 25%) and I increase the canvas height based on the difference between the long side expressed as a percentage... (7/6 = 17%) then I get an image with a size of 5x7.014 --- WOOHOO! that's close enough! The .014 comes from rounding.
So, I can have a 5x7 print of a 4x6 image with a nice white (shaded here) border in just a few steps....
1) open image - image - canvas size - increase width 25% and height 17%
2) crop tool set to 5x7 and crop
done -- a 4x6 is now a 5x7 but those percentages only work when changing a 1:1.5 to 1 1:1.4 -- won't work with an 8x10 (1:1.25) we need some new numbers....
Now the question is -- does anyone know how to write an "action" that will do this at the push of a button? We'd need 4x6 horizontal and vertical to 5x7 and 8x10 to meet 90% of people's needs... I can provide the math if someone else can provide the action writing skills....
Number of downloads: 12
Posted 24 July 2005 - 05:19 AM
Next experiment -- a 1:1.5 4x6 into a 1:1.25 8x10
If I work with the same method, difference in short side of 4/8 -- that's 50%. Probably too big of an increase to be pleasing to the eye but it will give me the right canvas. I'm thinking that working my 4x6 to fit into a 5x6.25 (also 1:1.25 aspect) might be more pleasing.
The short side difference 4:5 is 25%.
The long side difference 6:6.25 is much less now -- roughly 5%
Image - Canvas Size - height increase by 5% width increase by 25% -- result is a 5x6.3
Image - Image Size - change the 5" side to 8" -- result is an 8x10.08
That will work to make the 4x6 aspect ratio fit into an 8x10 but I don't really care for the border proportions...
Number of downloads: 8
Posted 24 July 2005 - 05:23 AM
image - canvas size -- add 10% all around (gives an 8.8 x 11.08)
image - image size -- change the "8.8" side back to 8"
and that gives us a really nice border all around the image and it fits in an 8x10 aspect ratio (well, almost fits -- we're going to crop .08 inches of white space in print).
Number of downloads: 12
Posted 28 July 2005 - 08:37 AM
Posted 28 July 2005 - 05:11 PM
Anyway to answer your question (???)...
Your image is basically a 1:2 ratio, so if you want the entire image taking up an entire piece of photo paper, it needs to be a size like 5x10, 4x8, etc. On 5x7, if you wanted to fit the entire image on the page, it would print with 0.75" of white space on each of the short ends.