Since this relates to the "should I care about 72 dpi or not?" thread, I just have to stick my nose in and give my two cents:
"Jodi Frye" wrote in message
[…] ( resolution for printed images should be between
150-300 with 300 being best )
IMHO, even for printing one shouldn’t worry about the resolution the image is set to, since you can always just stretch the image to come out the size you want on the printer (which is what the printer is going to do anyway if you happen to get the resolution-to-pixels ratio just right).
However, I take issue with the statement "with 300 being best" for printed images. As a general statement, it’s simply not true. The "best" resolution to choose for printed images is one of two choices:
* The resolution that genuinely corresponds to the intended size of the image, or
* The same resolution that the printer will be printing at
For the former, you find that resolution by dividing the number of pixels across or down (either one is fine assuming square pixels) by the width or height, respectively, at which you intend the picture to print. If you choose your resolution this way, then you should not have to adjust the scaling of the image any further when printing.
For the latter, you simply use whatever resolution the printer uses. For older laser printers this is indeed 300 dpi. However, for current ink jet printers (which is what most people here are probably using), this resolution will be anywhere from 720 up to 2880, using Epson’s printers. Other brands may be slightly different, but will be within 5-10% of those numbers. If you choose your resolution this way, then one pixel in your image will correspond exactly to one pixel on the printer. To further complicate this method, you really ought to pick a resolution that is some even fraction (1/2, 1/3, 1/4, etc.) of the actual print resolution, at least with ink jet and laser printers, because they dither to achieve the full range of color.
IMHO, the former method is more desirable. Using the latter, you will have to go back and change the resolution of the image (without resampling) every time you want to print at a different resolution, or else you will have to explicitly set the scaling to get the image to print at the same size. Using the former, the resolution actually *means* something with respect to the image.
All of the above is with regards to selecting a resolution for an image after the fact. For the purposes of creating the image in the first place, it’s even simpler. More resolution is better, period. The highest resolution at which you can capture an image (whether using a scanner, video camera, still camera, whatever), the better the image will look when printed.
Pete