I am taking pictures at 6 megapixels as they need to be printed big. I need them at 300dpi and the camera takes them at 72 dpi - how do i change this setting?
dpi is 72 Iwant to go to a larger dpi (300)
How and why are you taking them at 6 megapix, as the 400D camera is capable of taking at 10megapixels - taking at less is wasting part of the point of having a 10 mega camera, and will give you a smaller picture too - only 60% of your potential picture size is being captured - set your camera to the biggest and finest jpeg setting, or if you want, the RAW setting, and take the photos - you will have the best pictures you can get with the camera - if you choose raw, you will need to edit the photo in the Canon software which comes with the camera - the DPP program, which will then save them as a jpeg fot editing in Photoshop or other package, which is where you can change the size.
Anyway, you need to understand that the camera just takes so many pixels - it doesn't actually take at so many dpi. Your computer SHOWS them at about 72dpi on the screen. If you use photoshop or some other image processing package, you can change the size of the image. If you look at the size of the image, you will find that at 72dpi, the picture is 54 inches wide - which sounds big, but at the 300dpi, which is the quality for a good print, the photos from this camera will normally be about A4 size. If you want bigger, it needs to be done in Photoshop or your editing package on computer. You can do this in Photoshop by opening the picture, clicking on 'image' then drop down to 'resize', and then enter the picture size you want - you can choose the width or height you want, and then put the number of pixels at 300, instead of the 72. You will then have the picture at the size you want, and the definition you need for printing - you don't say how you will be printing, so I don't know how bigh you want - if any of this is not clear, please let me know, and I will try and help some more
regards
Adrian
How and why are you taking them at 6 megapix, as the 400D camera is capable of taking at 10megapixels - taking at less is wasting part of the point of having a 10 mega camera, and will give you a smaller picture too - only 60% of your potential picture size is being captured - set your camera to the biggest and finest jpeg setting, or if you want, the RAW setting, and take the photos - you will have the best pictures you can get with the camera - if you choose raw, you will need to edit the photo in the Canon software which comes with the camera - the DPP program, which will then save them as a jpeg fot editing in Photoshop or other package, which is where you can change the size.
Anyway, you need to understand that the camera just takes so many pixels - it doesn't actually take at so many dpi. Your computer SHOWS them at about 72dpi on the screen. If you use photoshop or some other image processing package, you can change the size of the image. If you look at the size of the image, you will find that at 72dpi, the picture is 54 inches wide - which sounds big, but at the 300dpi, which is the quality for a good print, the photos from this camera will normally be about A4 size. If you want bigger, it needs to be done in Photoshop or your editing package on computer. You can do this in Photoshop by opening the picture, clicking on 'image' then drop down to 'resize', and then enter the picture size you want - you can choose the width or height you want, and then put the number of pixels at 300, instead of the 72. You will then have the picture at the size you want, and the definition you need for printing - you don't say how you will be printing, so I don't know how bigh you want - if any of this is not clear, please let me know, and I will try and help some more
regards
Adrian
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Dots per inch (DPI) is an output specification and is completely irrelevant as far as the camera is concerned. It's determined when you print the picture, not when you take it.
As an example, let's say you took a picture that's 2000 by 3000 pixels (6 megapixels). If you make a 4x6 print of it, you're printing at 500 dpi. If you make a 8x12 print of it, you're printing at 250 dpi, but it's still exactly the same file from the camera.
The program you use to print your pictures will let you set the DPI. Your camera has to put some number in there, and so it probably uses 72.
DPI (dots per inch) is an output setting and is irrelevant as far as the camera is concerned.
Imagine you're taking a picture that's 2000 by 3000 pixels. At the time you take the picture, do you care how big you print it? When you get home and make a 4x6 print, you're printing at 500 dpi. If you make a 8x12 print, you're printing at 250 dpi. Either way, you're printing the exact same picture as taken by the camera. Since the camera doesn't know how big a print you're going to make, it simply puts in a default value for the dpi.
DPI (dots per inch) is an output specification and is meaningless to the camera. The camera puts in 72 simply because it can't leave it blank. 72 dpi is commonly used when viewing a picture on a computer screen. Suppose you have a picture that's 3000 by 4000 pixels (12 megapixels). If you make a 4.tinch by 6inch print (4x6) then you'll be printing at 667 dpi. If you make a 12 by 18 print of the same picture, you'll be printing at 222 dpi. It's the same picture, just printed at different sizes (and different dpi). The dpi value is set when you print the picture, not when you take it.
The DPI (dots per inch) number only has meaning when printing the picture. It's meaningless to a camera. The M1093IS takes photos that are 3672 x 2748 pixels at its best resolution. If you make a 4x6 print of one, you'll be getting more than 600dpi. If you make a 8x10 print of the same picture, you'll only be getting about 300dpi. Yet they're made from the same image file. If you must change the image file itself, open it in just about any photo editor, change the DPI field, then save the file. Make sure you do this to a copy, not the original.
Not really, since "300 dpi" is a print resolution specification. The camera takes pictures at whatever resolution you have set (0.3MP to 7.1MP on the A570).
If you print a 0.3MP photo at 300dpi, you'll get a picture 1.6 inches by 2.1 inches (smaller than a business card). If you print a 7.1MP photo at 300dpi, you'll get a picture about 8 inches by 10 inches. You can also get an 8x10 from the 0.3MP if you print at 60dpi, but the result will be rather grainy.
More information on exactly what you are trying to do would be helpful...
But it sounds like it's a resolution problem.
Computer monitors usually display 72 or 96 dpi (Dots Per Inch)
Printers usually print out images at 300 or 600 dpi
Some newspapers are printed at only 50 dpi
Scanners can scan a photo in thousands of dpi...
If your photo is a 4x6 at 300dpi, then when they try to display it in 72dpi, it will display as just a bit larger than a 16x20" image
When you are scanning a photo to email, then make sure that you set your resolution to 72 dpi to display on the screen - or vice versa, if you are going to print something, make sure you scan it at 300dpi
If you have any graphic programs, (Microsoft offers "PowerToys" for Windows XP) you can open the file in that, and usually find a setting for the Image Size that will let you set a new DPI. It's usually ok to lower an image's dpi - but there is a loss of quality anytime you try to add dpi, since you are forcing the computer to "guess" what all those hundreds of dots should look like, and they aren't good at that.
The DPI are not a user allowed settings. Normally DPIs are factory defined. You can change the DPI using software. Normally the image administration software and advanced softwares can allow you to change it.
Remember an important issue: DPIs are a printing matter not an image quality matter. Yo can set an image to 300 DPI and the same to 72 DPI and you will see no difference between both images.
A good camera and your skills will allow you to take high quality images.
A couple of things - I don't think you mean 500 megapixels (that is a lot!) but I assume you mean you expected a high resolution image. You may have it! The dpi setting is largely irrelevant (for photographers) as it simply relates number of pixels to a (notional) print size. Thus an image that is 3000 pixels wide (say) would print out to 10 inches at 300 dpi (3000/300) or 40 inches (approx) at 72 dpi (3000/72). the image has the same information /resolution - it's just "spread" further on the larger print. You can easily change the nominal dpi in e.g. Photshop Elements but it won't affect your image quality. If however you are getting low resolution images when setting the camera differently that's something different. I would need extra info to help there but pssibly check if the camera was set to RAW and maybe you were looking at the (small) JPEG usually saved with it?
As dpi is generally a printing specification, the size you set on your camera depends on what size prints you want to make. If you want to print 4" x 6" prints at 300 dpi, you can set the size to M2. If you want to print 5" x 7" prints at 300 dpi, set the size to M1. Anything larger, set the size to L. With L selected, an 8" x 10" will still be about 300 dpi, but any larger print will be at less than 300 dpi.
This resolution doesn't matter to most software. It doesn't change the image at all, just occasionally the size it is displayed (only if the software scales the image according to the resolution, which most don't).
This having been said, I doubt there is a way to change it in camera. But you could certainly change the XResolution and YResolution meta information with any good EXIF editor. Also, Photoshop can do this too, but it will mess up other things in the meta information. You should be able to script either to apply this change to a number of photos at once.
How and why are you taking them at 6 megapix, as the 400D camera is capable of taking at 10megapixels - taking at less is wasting part of the point of having a 10 mega camera, and will give you a smaller picture too - only 60% of your potential picture size is being captured - set your camera to the biggest and finest jpeg setting, or if you want, the RAW setting, and take the photos - you will have the best pictures you can get with the camera - if you choose raw, you will need to edit the photo in the Canon software which comes with the camera - the DPP program, which will then save them as a jpeg fot editing in Photoshop or other package, which is where you can change the size.
Anyway, you need to understand that the camera just takes so many pixels - it doesn't actually take at so many dpi. Your computer SHOWS them at about 72dpi on the screen. If you use photoshop or some other image processing package, you can change the size of the image. If you look at the size of the image, you will find that at 72dpi, the picture is 54 inches wide - which sounds big, but at the 300dpi, which is the quality for a good print, the photos from this camera will normally be about A4 size. If you want bigger, it needs to be done in Photoshop or your editing package on computer. You can do this in Photoshop by opening the picture, clicking on 'image' then drop down to 'resize', and then enter the picture size you want - you can choose the width or height you want, and then put the number of pixels at 300, instead of the 72. You will then have the picture at the size you want, and the definition you need for printing - you don't say how you will be printing, so I don't know how bigh you want - if any of this is not clear, please let me know, and I will try and help some more
regards
Adrian
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