How to adjust the resolution to 300 DPI on an

Canon PIXMA Manuals MG2900 series Resolution
Resolution The data in the image you have scanned is a collection of dots carrying information about brightness and color. The density of these dots is called "resolution", and resolution will determine the amount of detail your image contains. The unit of resolution is dots per inch (dpi). Dpi is the number of dots per inch (2.5 cm). The higher the resolution (value), the more detail in your image; the lower the resolution (value), the less detail.

How to Set the Resolution You can set the resolution in Resolution on the (Scanning from a Computer) tab of the Settings dialog.
Appropriate Resolution Settings Set the resolution according to the use of the scanned image.
Item Type Use Color Mode Appropriate Resolution Color photo Copying
(Printing) Color 300 dpi Creating a postcard Color 300 dpi Saving to a computer Color 300 dpi Using on a website or attaching to e-mail Color 150 dpi Black and white photo Saving to a computer Grayscale 300 dpi Using on a website or attaching to e-mail Grayscale 150 dpi Text document (document or magazine) Copying Color, Grayscale, or Black and White 300 dpi Attaching to e-mail Color, Grayscale, or Black and White 150 dpi Scanning text using OCR Color or Grayscale 300 dpi Important

• If you double the resolution, the data size of the scanned image quadruples. If the file is too large, the processing speed will slow down significantly, and you will experience inconvenience such as lack of memory. Set the minimum required resolution according to the use of the image.

Note

• When you will be printing the scanned image by enlarging it, scan by setting a higher resolution than the recommended one above.

This is a complicated issue. You have to understand the computer term DPI, which stands for Dots Per Inch. This applies in three places:

1. when you scan, you can set this
2. when you display it on your monitor, your monitor will be usually 72 DPI or 100DPI depending on what resolution your video driver is set to
3. when you print, it depends what resolution your printer can print at. Your printer can also stretch the image onto the paper by duplicating dots as needed.

Dots = Pixels
In PixWizard, we show you the image size in Dots.

Let's assume you scan at 300 DPI. You scan an 8x10 picture. This is saved as 2400 dots (8" x 300 dots/inch) by 3000 dots (10" x 300). Let's assume your printer is 600DPI. In dots, this is 4800 (8" x 600) by 6000 (10" x 600). For best results, you should scan at 600DPI and set the print options to use a 1:1 scale when printing. Our programs can also stretch the image to fit the entire printable area of your printer.

check if the setting FORMAT CONVERT is with some numbers, please change for NONE.
This seting change the resolution from Printhead 200dpi or 300dpi or 150 dpi or none, none mins, if you have 200dpi printhead, print 200dpi resolution(small fonts). if have 300 dpi, print with 300 dpi resolution, if have 300 dpi(very small fonts) printhead, can print 150dpi(big fonts) if change this setting.
if ok, check the driver or your software.

Your camera cannont shoot at either 72 dpi or 300 dpi. It shoots at whatever resolution you have it set for. Dpi (dots per inch) is a print specification, denoting how large (or small) your pictures are printed.

The DSC-W100's highest resolution is 3264x2448. Printed at 72 dpi, it can generate a print bigger than 40x30 inches, albeit a bit grainy. Printed at 300 dpi, you can generate 10x8 inch prints.

Again, dpi is a measure of how you print pictures. It has no bearing on how you capture images with your camera.

Save the scanned image as a TIFF for archiving. TIFF files can beresaved and edited without compression loss, thus maintaining the highquality of an image. If you are enlarging an original 4 x 6 photo to8.5 x 11, save the scanned image as a TIFF at 600 dpi resolution. TIFFsprovide more detail than other file formats. Scanned images for emailand posting on the Web, which are to be viewed on a monitor, should besaved as JPEGs at 75 or 100 dpi. JPEGs generate smaller file sizes,which download faster on the Internet. Increase the resolution to 150or 300 dpi only if you are emailing a scanned JPEG image for therecipient to print. Save JPEGs at the maximum quality setting.

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.

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?

Resolution is a hard thing to grasp. I'm guessing the original logo created was either a low DPI and/or a small physical size. For example if you create a 1in x 1in logo at 300 DPI and increase the size to 4in x 4in at 300 DPI - the image does not contain small enough pixels to give a quality image (1 pixel is translated to 4 giving jagged edges). I hope this helps.

Shooting pictures in Fine quality will give you atleast 300 DPI resolution. Check your camera setup menu to see what quality you're shooting in, and adjust as necessary.
If you need to print 300dpi, this is done in whatever program you're using to output. In Photoshop, this is done by going to image>image size and changing Resolution to 300 (or whatever other resolution you want)