goofy mood

Keegan — Sun, 02 Sep 2001 04:35:57 +0000

This is my 2000x2000 self portrait zoomed 400,000 percent.

Roo — Sun, 12 Aug 2001 02:43:37 +0000

I discoverd this just before my less than 8 month old scanner died. (GRRR)

If it's something you can scan, and your scanner will increase size, I found that enlarging through the scanner does an excellent job at enlarging withoug distortion. It even worked well with very small very old photographs.

This photo was taken in 1989 with an old Vivitar camera, the print is 3 1/2 X 4 1/2 inches..this is enlarged through the scanner 300X and then pasted into Photoshop. I scanned it at only 72 DPI, and couldn't belive the job it did.

Trying to enlarge it in Photoshop caused some fuzziness and atrifacts.

http://www.sapphiredesign.net/weblog/joshsurgery1.jpg

I've discovered my printer does a great job of enlarging to 8X10 as well.A guy form HP was there the day I bought it and did say that 2100 and up is "true" print quality.

But I've found that even incresing someting to 300 in Photoshop made it distorted.

Megan — Fri, 10 Aug 2001 17:13:50 +0000

Here's an article on photography for the web and image resolution that may interest you

http://www.webreference.com/graphics/column50/

BTW - this column by Wendy Peck at Webreference is really good - might be a good idea to check out some of her other articles while you're there.

benmcm — Wed, 08 Aug 2001 02:31:43 +0000

You will always lose some degree of sharpness when enlarging a picture or other graphic no matter what program you use.

Later,
Ben
FREE - "1001 Webmaster Resources"
http://webresources.hostingbee.com

sersun — Wed, 08 Aug 2001 01:26:02 +0000

You will always lose image quality when enlarging. If that weren't the case, you could keep zooming and zooming until you were looking at microscopic particles.

Digital images are made up one-color pixels or blocks of pixels. Once you enlarge the image, those blocks just get bigger, making the image look "pixelated." When you enlarge an RGB image in photoshop (like a JPEG), it tries to smooth out those chunks, reulting in a blurry appearance.If you are enlarging a GIF image, try converting to RGB mode first, so photoshop can smooth it a bit.

If possible, always scan the image at a resolution higher than the final product will be (>72 dpi, if web) so you can increase the size without losing perceived quality.

Sersun

TheGizmoid — Tue, 07 Aug 2001 21:31:15 +0000

One factor is the dpi of the original. If it was scanned at 300 dpi or such, enlarging will work better.

But if it's 72 dpi like from most digicams, scaling up won't work as well, even with interpolation.

mjames — Tue, 07 Aug 2001 20:20:20 +0000

Welcome to TWF!

The best way I know how to do this is (in Photoshop 5.5), go to Help > Resize Image > Select "Online" > and enter your new image size. It calculates the width if you enter your new height, or vice versa.