Comments on: Scanning resolution… http://terrychay.com/blog/article/scanning-resolution.shtml You tell that other boy, not to touch the woodwork... Fri, 21 Nov 2008 23:48:07 +0000 http://wordpress.org/?v=2.7-hemorrhage hourly 1 By: tychay http://terrychay.com/blog/article/scanning-resolution.shtml#comment-1974 tychay Mon, 01 May 2006 08:09:04 +0000 http://terrychay.com/blog/article/scanning-resolution.shtml#comment-1974 taku, I get 14" x 18" x 300dpi/inch * 300dpi/inch = 23 megapixel. 23 megapixel * 3 bytes/pixel = 65MB 24-bit TIFF, not 500MB. Note that TIFF allows compression so the file size should be smaller than that. Also this quality is much more than you need, but it will allow you to do a lot of editing without any posterization. A better trick for larger than 10" prints is scan and store a 24-bit 10" print @ 300 dpi (21MB uncompressed). When you need to print out say an 18" print, you scale it up to 18" (there is 3rd party fractal software that will do that well, but another approach is to use Photoshop's crappy scaling @ 110% a number of times until you get there) then you apply sharpening and output. I hope this helps. taku,

I get 14″ x 18″ x 300dpi/inch * 300dpi/inch = 23 megapixel. 23 megapixel * 3 bytes/pixel = 65MB 24-bit TIFF, not 500MB.

Note that TIFF allows compression so the file size should be smaller than that. Also this quality is much more than you need, but it will allow you to do a lot of editing without any posterization.

A better trick for larger than 10″ prints is scan and store a 24-bit 10″ print @ 300 dpi (21MB uncompressed). When you need to print out say an 18″ print, you scale it up to 18″ (there is 3rd party fractal software that will do that well, but another approach is to use Photoshop’s crappy scaling @ 110% a number of times until you get there) then you apply sharpening and output.

I hope this helps.

]]> By: taku http://terrychay.com/blog/article/scanning-resolution.shtml#comment-1969 taku Sun, 30 Apr 2006 22:01:20 +0000 http://terrychay.com/blog/article/scanning-resolution.shtml#comment-1969 hi I'm wondering if scanning 35mm negatives should end up as 500 mb files...(that's what I'm getting now.) It's way too big for me and I wonder if it's necessary. I'm printing A3 size photos. (more than 18 inches..) hi I’m wondering if scanning 35mm negatives should end up as 500 mb files…(that’s what I’m getting now.) It’s way too big for me and I wonder if it’s necessary.

I’m printing A3 size photos. (more than 18 inches..)

]]> By: tychay http://terrychay.com/blog/article/scanning-resolution.shtml#comment-1102 tychay Thu, 26 Jan 2006 01:09:19 +0000 http://terrychay.com/blog/article/scanning-resolution.shtml#comment-1102 <a href="http://theonlinephotographer.blogspot.com/2006/01/daylight-darkroom.html" title="The Daylight Darkroom—The Online Photographer" rel="nofollow">Mike Johnston points us to another flatbed scanner</a> that specializes in film/negative/transparency scans in a way that tops my Canon 9950F: The Epson Perfection 4990. Mike Johnston points us to another flatbed scanner that specializes in film/negative/transparency scans in a way that tops my Canon 9950F: The Epson Perfection 4990.

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