Trub
join:2002-12-25
Plano, TX | [Help] Increase DPI ?
I have a Pentax K10D and all my pictures are coming out in 72 DPI, and I can not find how to increase it to the max DPI. I am capturing in RAW DNG @ 10 MP, so could someone explain this to me.
Thanks in advance |
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sykocus
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join:2002-11-21
Guam, USA | The program you use to convert the files with should have place where you set the resolution of the converted file. In adobe camera raw it is in the lower left part of the ACR window. |
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Trub
join:2002-12-25
Plano, TX | So the camera doesn't capture at 300 dpi you have to upconvert it? |
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no__1__here
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join:2003-10-13
Tomball, TX
2 edits | reply to Trub
»The Reality of Resizing.
Basically you need to just change the DPI from 72 to 300 (or 150, 240, 600, 1200, whatever your output device wants for best quality). Don't mess with anything else. You'll see that the print size goes from huge to "reasonable". You're 10MP RAW file is already at its "max" resolution, and the DPI doesn't make a bit of difference until you actually print hardcopy. For screen viewing you do not need anything more than 72dpi. |
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rcroning
D70 Rocks
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join:2005-05-21
Winnipeg, MB | reply to Trub
OK, this is confusing......I just checked some of my images out-of-camera (D70) and the dpi is 300. So is the above just a Pentax thing? |
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no__1__here
Premium
join:2003-10-13
Tomball, TX
1 edit | Depends on what you're doing, and what he's doing. RAW files are RAW and AFAIK have no DPI (again because DPI means nothing until printed). When I open a RAW file in ACR I have the option down in the bottom left to set the DPI as I open it. Once open I can do a image resize and change only the DPI (or anything else).
If you're doing in-camera JPG's or something it may be setting DPI to 300. 
Or your RAW software is defaulting to 300 (?). |
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Gemologist
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USA
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Many cameras output @ 72dpi but if you take notice their print sizes are also HUGE, lol. Just change it to 250 or 300 without resampling and you will be fine. If you need a larger size then it gets at 250-300 then let your printer do that if you send out for print, they will be able to do it much better then you can. I know many times I have screwed up and sent my IR shots from my Sony DSC-F717 in for print @ 8x10" and 11x14" and left them on 72dpi, rofl, but the print house fixed it and they came back just fine 
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Trub
join:2002-12-25
Plano, TX | how would I change the dpi in Elements 3? And why can the printer do a better job than I can? Sorry to ask so many question, but I'm quite new as you can tell. |
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tmpchaos
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| Assuming it's anything like PS itself, go to image size, uncheck resample image, then change the dpi. The file size will stay the same, as will the pixel dimension, while the print size will change.
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Gemologist
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A Print House can do a better job then you can because they have much better software then any of us even have access to to resample the files.
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Trub
join:2002-12-25
Plano, TX
| reply to tmpchaos
said by tmpchaos  :The file size will stay the same, as will the pixel dimension, while the print size will change. Ok I downloaded PS CS2 and it does save it at 300 dpi but the image resolution doesn't reduce, (3872x2592) it is the same as the 72 dpi. And shouldn't the file size be big? It's only 2 MB in size? |
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robs440
Premium
join:2003-06-26
Orlando, FL | reply to Trub
I've always wanted to know this too.....thanks for the info. |
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no__1__here
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join:2003-10-13
Tomball, TX
1 edit | reply to Trub
Pixel dimensions do not change when altering the DPI. Check the document size (inches). That is what changes.
ETA: That's what I meant earlier with your output is already at the "max" pixels it is going to have (barring upsizing). Changing the DPI alters the print output (document) size only. You will still have the same pixel dimensions, regardless of what DPI you enter. |
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Trub
join:2002-12-25
Plano, TX | Oh I see. I was thinking they were the same thing. So for printing dpi makes a big difference? I guess it depends on how big of pic your printing? |
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no__1__here
Premium
join:2003-10-13
Tomball, TX
| DPI only matters when printing. For on-screen stuff DPI is irrelevant (well not entirely, it affects file size I suppose).
DPI = dots per inch. The denser this is (e.g. the higher the dots per inch) the better the print, generally (unless you're going for that half-tone look).
So, for a 4x6 print at 300DPI you'd need a pixel size of 1200x1800. For the same print at 150DPI you only need 600x900.
The best DPI is that which your printer/lab wants, whether that be 150, 240, 300, 600, or whatever. |
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rcroning
D70 Rocks
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Winnipeg, MB
| reply to Trub
said by Trub :how would I change the dpi in Elements 3? And why can the printer do a better job than I can? Sorry to ask so many question, but I'm quite new as you can tell. Everyone here loves answering questions so ask away |
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KDH
No Grumps Allowed
join:2006-02-01
| reply to Trub
I hope my reply isn't too far off the mark 
Pentax K10D @ dpreview.com
you'll notice on the 14th line UP from the bottom
Quality Levels ....... Normal, Fine, Superfine
I do believe that THIS is the setting you are looking for .. you just need to find it in your menus ....
but that's not to imply that what everybody has to say about RAW and PRINTING isn't accurate  .. but if you shoot JPEG you may want to look for this menu item .. it will probably be with your image size (2048x1536, for example)
I have a Canon A75 (3.2 MP) .. and "Superfine" seems to be 180 dpi .. not terribly happy about that .. but it IS just a point and shoot camera |
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B52GUNR
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| DPI doesn't matter at capture, it's the number of pixels that matters.
Take my camera, the Minolta Maxxum 7D. It is a 6 megapixel camera (3008x2000).
When I shoot JPEG the image size is the following:
3008x2000 at 72 DPI with a print size of 41.8 x 27.8
When I shoot RAW the image size is:
3008x2000 at 240 DPI with a print size of 12.5 x 8.3
All that matters is how many pixels you have, that's your "bucket" of data. So, let's make the bucket of data a bucket of paint. You can either paint a very large wall with very little paint coverage (less DPI) or a smaller wall with very dense paint coverage (more DPI).
On digital cameras (even DSLRs), the superfine/fine/standard modes set the level of compression (and in some models the image size, in others image size may be separate as on mine I can choose size and quality), and some cameras may increase the DPI, but that does not matter, again, all that matters is the number of pixels you capture.
Now,there is of course a caveat to this. A lot of printers won't print over the DPI that they are rated at and just discard the extra data. So if you're going to print something at 4 inches by 6 inches at 300 DPI that is when you either want to crop it to that size by using the crop tool set to proper values or then you do a resample/resizing of the image to bring it to what you need.
For example, going back to my camera at 3008 x 2000 pixels to print a 4x6@300 DPI I need a 1200x1800 image so what I do is use the crop tool set to 4 inches by 6 inches (or 6 inches by 4 inches if it's a landscape oriented photo) and 300 DPI. Then I crop the image and when I'm done it's perfectly sized at 4" x 6" @ 300 DPI.
To reiterate, DPI does not matter until you are printing all that matters is the number of pixels you have and from there you can calculate your print sizes at various DPI settings.
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seanm6869
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join:2002-12-03
Versailles, KY | reply to Trub
My S3 IS only shoots in 180 DPI |
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B52GUNR
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| said by seanm6869 :My S3 IS only shoots in 180 DPI That doesn't mean much, though . The S3 is 6 megapixels, so let's say let's say 3000x2000, at 180 DPI that's an image that is 16.67 inches by 11.11 inches. If you change the image to 300 DPI without resampling you are at 10 inches by 6.67 inches. It doesn't matter what DPI the camera shoots in, it only matters when you send it to the printer (be it your printer or Wal*Mart or whomever).
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Some assembly required, your mileage may vary, no pixels were harmed in the writing of this post. Brain cells, though, are a different matter. You want fries with that? |
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