[meteorite-list] Iron Meteorite on Mars (Color Photo)

[Darren Garrison]

On Thu, 20 Jan 2005 00:46:07 -0500, Darren Garrison <cynapse at charter.net> wrote:

>On Wed, 19 Jan 2005 22:18:33 -0700, "Chris Peterson" <clp at alumni.caltech.edu> wrote:
>
>>The number of pixels has nothing to do with resolution. What matters is the 
>>size of each pixel and the focal length of the camera. In the case of the 
>>Pancam, that's 16um and 38mm, giving a resolution of about one arcminute- 
>>slightly better than the human eye.
>>
>
>Okay, then, cut the word "resolution" out of my reply and replace it with whichever word means 
>
>"total number of pixels available in the image, this being the factor-- assuming good optics-- that
>determines the size at which an image can be printed and still look good"

Just as a follow-up, I found the correct word that goes in the place of my incorrectly used
"resolution".  It is the word "resolution".

http://en.wikipedia.org/wiki/Image_resolution

Image resolution
From Wikipedia, the free encyclopedia.
The image resolution is a term that says something about how much image detail an image can hold.
The term is most often used in relation to digital images, but is also used to describe how grainy a
"film-based" image is. Higher resolution means more image detail. For digital raster-images, the
convention is to describe the image resolution with the set of two positive integer-numbers, where
the first number is the number of pixel-columns (width) and the second is the number of pixel-rows
(height). The second most popular convention is to describe the total number of pixels in the image
(typically given as number of megapixels), wich can be calculated by multiplying pixel-columns with
pixel-rows. Other conventions include describing resolution per area-unit or resolution per
length-unit such as pixels per inch. Below is an illustration of how the same image will appear at
different resolutions.