Aspect Ratio Agrrr... - DPChallenge Forums

Canon EF 17-40mm f/4.0L USM

12/30/2003 04:46:08 PM · #1

Man! It's hard getting shots ready for the dpc prints! The tutorials are good but still aren't working for me. How come a high resolution shot I take ends up being just 72 dpi? What can I do before the shot to make sure the dpi is above this?

I'm having loads of problems preparing shots for prints. How can I make a border without messing up the aspect ratio? I hate math too. Any tips will be much appreciated!

vadvirag

Canon EOS-350D Rebel XT

Canon EF 50mm f/1.8 II

12/30/2003 04:50:14 PM · #2

Hi Rooster,

I actually do that I cut off the border width and height from the photo and I make the border this way... For example if you have an 3000*2400 photo and you want a 100 pixel border, crop 200 horizontally and vertically, add the 100 pixel border around and you will get the same 3000*2400 resolution. I will think about better ideas, at the moment this is what I do, too. :-)

Marta

soup

Canon EOS-30D

12/30/2003 04:52:59 PM · #3

wondering the same thing

6MP cam - 72ppi - have to upsample an uncropped image
and then it doesnt match the 150ppi requirement evenly...

i can print fine at home - at 300ppi - but images are being rejected from DPCprints at that res...

EDIT: i don't want to bother submitting any until i know exactly what they want...

Message edited by author 2003-12-30 16:54:12.

Canon EF 17-40mm f/4.0L USM

12/30/2003 05:04:29 PM · #4

Thanks Marta!
And soup, dunno what to do either! Let's hope folks that do know, hit us up on some good tips on this thread

pitsaman

Canon EOS-30D

Canon EF 50mm f/1.8 II

12/30/2003 05:07:05 PM · #5

Originally posted by soup:

They want 8X10,16X20,5X7,20X30 .....etc ,inch photo sizes at MINIMUM of 150 dots per inch (DPI),photo must be top quality,no grainy noise and with artistic value(not an family snapshot).

Here is one example:

Print File Specs
Width: 3200
Height: 2560
Size: 2.2mb
Aspect: 1.25:1

Approved! Your print has been approved. Begin selling now!

Message edited by author 2003-12-30 17:20:09.

soup

Canon EOS-30D

12/30/2003 05:47:26 PM · #6

i understand the pixel sizes, and the dpi requirement.
have had some accepted with no probs

does it have to be exactly 150dpi?

what size print should you expect be accepted from an uncropped 6MP image. if resampled properly?

StevePax

Canon PowerShot S50

12/30/2003 05:51:16 PM · #7

OK, here we go again. YOUR PRINTED IMAGE IS NOT 72 DPI!!! When you look at it on your screen, your uncropped image in Photoshop probably says 72DPI. That is probably the screen resolution - a common resolution for computer monitors. Your printed resolution is absolutely and completely unrelated to that 72 DPI number whatsoever. To calculate your printed resolution, take the total number of pixels along one side and divide it by the number of inches along that same side for the printed image.

For example, using Pits's image, the width is 3200 pixels, and the height is 2560 pixels. Thats a 1.25:1 ratio, which is the right aspect ratio for an 8x10. So, the width will be 10 inches, and 3200 pixels, thats 320 pixels per inch. The height will be 8 inches, and 2560 pixels, thats 320 pixels per inch, again (it will always be that way). That's a great printing resolution. The only thing that matters is your aspect ratio and your total printed resolution. Don't worry about that 72 DPI thing. Only total pixels.

With my 4MP cam, I have a 16x20 approved.

Message edited by author 2003-12-30 17:51:44.

goodtempo

Canon EOS-450D Rebel XSi

Canon EF 50mm f/1.8 II

12/30/2003 05:57:30 PM · #8

Try this tutorial posted by Setzler:

Creating Printable Images

It works pretty good, both re-sizing and increasing the resolution work great. Try it.

Message edited by author 2003-12-30 17:58:01.

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

12/30/2003 06:08:52 PM · #9

Originally posted by goodtempo:

Try this tutorial posted by Setzler:

Creating Printable Images

It works pretty good, both re-sizing and increasing the resolution work great. Try it.

Steve, you seemed perturbed. Dunno why, ,kinda seems uncalled for but whatever!

Goodtempo, I did try jim's tut, & there is some emphasis on redoing the dpi bc when you use his tut step by step the dpi gets changed to 72 (I think). I'm looking for some simpler explanations (not passive-agressive ones like Steve's). Simple tips of getting it right.

Message edited by author 2003-12-30 18:12:15.

nicklevy

Canon EOS-350D Rebel XT

12/30/2003 06:57:32 PM · #10

Hi Rooster, What steve was trying to explain is:

When you go into the image size dialog in photoshop and it says your picture is 72dpi, that number mean nothing, he's just there for working purpose. What DPCPRINT want is that you submit a picture that is at least 150dpi, wich mean:

No matter what photoshop says how much dpi your picture have

you have to submit a picture that is at least 150 pixels for each inch you want to print. In example:

If you want your print to be approved at 8x10

8x150= 1200
10x150= 1500

so you must submit a picture that is 1200x1500.

That said, 150 dpi is acceptable but 300dpi is the real target.

8x300= 2400
10x300= 3000

If you want your picture to be a 300dpi 8x10 she has to be 2400x3000

no matter what photoshop tells you if you have a picture that size she will be 8x10 a 300dpi.

Hope that help, if not just reply in the post and i'll try to explain another way.

Message edited by author 2003-12-30 18:59:11.

Konador

Canon EOS-500D Rebel T1i

Canon EF-S 18-55mm f/3.5-5.6 IS

12/30/2003 06:59:38 PM · #11

I've created this video to show you how to get a file to 150dpi at the size you want it printed, in about 2 simple steps. Hopefully it will be clearer than reading it.

dpi.wmv ~3mb
//www.eblogger.net/~dna/dpi.wmv

I can't host it here for long, so I suggest perhaps downloading rather than streaming, but it's up to you.

rcrawford

Nikon D300

Nikon AF-S DX Zoom-Nikkor 16-85 f/3.5-5.6G ED VR

12/30/2003 07:03:03 PM · #12

The first thing I do is go to Image, Resize, Image Size and, making sure that the Resample Image box is un-checked, I set the Resolution to 150 or 300 or whatever I want the final image to be. I can then see the size of print that will yield in the Document Size window. From there I can resize either by Pixel Dimensions or Document Size. (To actually change the Image Size you have to check the Resample Image Box)

Canon EF-S 18-55mm f/3.5-5.6 IS

12/30/2003 07:26:12 PM · #13

Nick, that was gerat. I'm a littel slow & really ahte math so I havea natural diversion to anything realted. Those were simple terms even I can understand. Gonna check out the video as well.
Thanks everyone!

Konador

Canon EOS-500D Rebel T1i

12/30/2003 09:15:04 PM · #14

Originally posted by Rooster:

I hope it helps :)