Comments on: Another monster board-scan http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/ the blog that is not dansdata.com Tue, 07 Oct 2008 04:01:10 +0000 http://wordpress.org/?v=1.5.1-alpha by: HitScan http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-880 Thu, 12 Apr 2007 06:47:11 +0100 http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-880 8" Floppy eh? I need to dig that old Shugart box of of my garage. Well, and find a scanner I suppose, heh. 8″ Floppy eh? I need to dig that old Shugart box of of my garage. Well, and find a scanner I suppose, heh.

]]> by: dvayn http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-879 Thu, 12 Apr 2007 01:53:26 +0100 http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-879 You can see this on the chips as well; the tops of the chips are visible on the bottom, and you see less and less as you go up the image. You can see this on the chips as well; the tops of the chips are visible on the bottom, and you see less and less as you go up the image.

]]> by: dvayn http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-878 Thu, 12 Apr 2007 01:51:36 +0100 http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-878 Also, whats interesting, is that if you look closely, you can see that both of the inside walls of the outer encasing are visible... Was this really scanned? It appears as though there is 1 focal point for this image. Or am I misunderstanding the way a scanner works? I always thought it was more like a bugs eye, where each light sensor only sees in a straight line ahead of it (and have a bunch of these in a line that moves across the image), as opposed to a pin hole where you see things in all directions? Also, whats interesting, is that if you look closely, you can see that both of the inside walls of the outer encasing are visible… Was this really scanned? It appears as though there is 1 focal point for this image.

Or am I misunderstanding the way a scanner works? I always thought it was more like a bugs eye, where each light sensor only sees in a straight line ahead of it (and have a bunch of these in a line that moves across the image), as opposed to a pin hole where you see things in all directions?

]]> by: Daniel Rutter http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-877 Thu, 12 Apr 2007 01:17:37 +0100 http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-877 A scanner picture <i>does</i> have perspective, in a manner of speaking - it's just that it's only in one dimension. Because the image sensor is a line, scanned images are squashed horizontally, for the same reason that the vertical slit pupil of a cat squashes the world vertically: <a href="http://www.dansdata.com/images/phototute/motor640.jpg"><img src="http://www.dansdata.com/images/phototute/motor280.jpg" alt="Drive motor scan" width="280" height="314"/></a> This is an old hard drive motor, shaped like a top hat; the "oval" section is actually circular, but far enough away from the scanner glass that it's distorted. (The picture's from my old <a href="http://www.dansdata.com/phototute3.htm">photo tutorial</a>.) The vertical rather than horizontal alignment of cat pupils, biologists are reasonably sure, is because cats are more interested in things scurrying around horizontally than things moving up and down. Slit pupils in general are desirable because they allow a bigger aperture range, so your high-sensitivity night eyes don't get dazzled during the day. A scanner picture does have perspective, in a manner of speaking - it’s just that it’s only in one dimension. Because the image sensor is a line, scanned images are squashed horizontally, for the same reason that the vertical slit pupil of a cat squashes the world vertically:

Drive motor scan

This is an old hard drive motor, shaped like a top hat; the “oval” section is actually circular, but far enough away from the scanner glass that it’s distorted.

(The picture’s from my old photo tutorial.)

The vertical rather than horizontal alignment of cat pupils, biologists are reasonably sure, is because cats are more interested in things scurrying around horizontally than things moving up and down. Slit pupils in general are desirable because they allow a bigger aperture range, so your high-sensitivity night eyes don’t get dazzled during the day.

]]> by: kamikrae-z http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-875 Thu, 12 Apr 2007 00:32:50 +0100 http://dansdata.blogsome.com/2007/04/11/another-monster-board-scan/#comment-875 The cool thing about scanners, which a friend pointed out to me a while ago, is that they let you take images that lack perspective (well, as close as is <a href="http://www.xs4all.nl/~jcdverha/scijokes/6.html" rel="nofollow">practical</a>.) I guess that sorta makes it like the macro lens version of the <a href="http://en.wikipedia.org/wiki/Perspective_correction_lens" rel="nofollow">shift lens</a>. The cool thing about scanners, which a friend pointed out to me a while ago, is that they let you take images that lack perspective (well, as close as is practical.)

I guess that sorta makes it like the macro lens version of the shift lens.

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