| Author | Thread |
|
|
03/28/2004 06:58:40 PM · #1 |
I was curious, is there any charts that describe what pixel size certain photopaper sizes are?
Example:
An 8x10 Picture would be equivalent to ____x____ pixels.
|
|
|
|
03/28/2004 07:02:06 PM · #2 |
Jeremy,
Check out tutorials //www.dpchallenge.com/tutorial.php?TUTORIAL_ID=10
This made it all work for me. |
|
|
|
03/28/2004 07:02:33 PM · #3 |
Originally posted by outofreachx:
An 8x10 Picture would be equivalent to ____x____ pixels. |
At 300 DPI the pixels would be 2400 x 3000
|
|
|
|
03/28/2004 07:05:02 PM · #4 |
It depends on the DPI of the output copy.
For example if you want an 8x10 @ 300 dpi than your digital file should be 2400 x 3000 pixels. However, you can generally get down to around 150 dpi on inkjet printers today and still have great quality to the human eye. Now you'd only need 1200 x 1500 to get that 8x10 print.
|
|
|
|
03/28/2004 07:23:46 PM · #5 |
pixels (picture elements) are an odd form of unit, as they are dimensionless.
So you need to qualify it with how many pixels per inch (PPI) you plan on
using. Often this gets losely termed DPI or dots per inch, which can be confused with the DPI or dots per inch used by a printer (which is usually a much higher number)
Typically several dots on a printer go together to show one pixel on a printed output (much in the same way that three dots go together to make one pixel on a monitor/TV |
|
|
|
03/28/2004 07:57:23 PM · #6 |
|
|
|
03/28/2004 08:07:57 PM · #7 |
At the risk of adding more confusion that clarity I will at the following observation.
It is also helpful to keep in mind that not all pixels are equal. Most digital cameras, including mine, us a Bayer pattern to get the colors. This has the effect of slightly blurring the image compared to what one could get if each pixel had three sensors. The Sigma camera it should be noted does not suffer from this due to its having three sensors at each pixel. Scanned photos also do not have this problem since scanners use three sensors per pixel, but then the film often is the limiting factor. As an example a digital camera that uses a Bayer pattern might need an output resolution of 200 dpi to match the quality of a medium format camera who̢۪s negative is scanned to have an output resolution of 150 dpi. It should also be noted that if you shoot photos at less then the full resolution that your camera supports you would be able to print with lower dpi for the same quality output. A 6 MPixel camera that is capturing 3 MPixel images will produce clearer images then a 3 MPixel camera that is capturing 3 MPixel images and so will be able to print slightly large photos from the 3MPixel image that it captures.
Scott
|
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/03/2025 04:23:25 PM EDT.
