Originally posted by ruthiek:
When I scan a print, I can set the resolution at, say, 200. And when I pull up the .jpg in PhotoShop, the resolution is 200.
So I don't understand why the file from my camera -- no matter what quality setting -- seems to be 72 all the time when I pull it up in Photoshop.
I thought the difference in quality between Large and Medium would be that the resolution would be higher in Large, but I guess not.
Is it possible to go from digital camera to PhotoShop and pull up a .jpg with a 100 resolution instead of it always being 72?
Thanks. |
The resolution will be higher in large. If you look at the image size, it will have more horizontal and vertical pixels in it than in the medium version. That's all the resolution is, the number of pixels.
Now, when it comes to translate that to prints, then you have to decide how many of those pixels you want to squeeze into each inch of paper - that's the number of dots per inch. Your screen typically has about 72 dots per inch, so your camera always sets the image to that size. You probably want to print at about 300 DPI. You can change the DPI value, without having to resample the image at all. You can do that in photoshop with the 'resample' check box unchecked. You'll notice that the print size will change as you change the DPI value, but the pixel dimensions don't change - you aren't changing the resolution, just how many dots you fit into each inch, which changes the size.
However, nothing comes for free - if you make the dpi really small, without resampling, then you'll get really big versions of each pixel, which would make your image look pretty blocky - although that would be fine if you look at it from far enough away. E.g., road side billboards use pixels about the size of golf balls.
Message edited by author 2003-04-23 09:19:13. |
