Thickness of paper

1 次查看（过去 30 天）
Gova ReDDy
Gova ReDDy 2011-9-28
Hi...Can anyone suggest a method of finding the thickness of paper in the link below http://tinypic.com/r/30dfrbl/7

请先登录，再回答此问题。

回答（3 个）

Walter Roberson
Walter Roberson 2011-9-28
No. The same image has no scale indicators, so no absolute measurements are possible.
The sheet of paper to the left curves away from the camera, and is never shown edge-on, so we cannot determine its thickness.
There is something semi-vertical in the center, but we cannot tell if it is a single sheet or multiple sheets.
If you knew the mechanical properties of the paper, and knew the local force of gravity, and knew the temperature and humidity, then if we assume that the curve of the sheet on the left is due to the action of gravity and that the sheet is resisting gravity by way of its mechanical stiffness (which, in the case of wood pulp or similar materials would be affected by humidity and possibly temperature), then it might be possible to estimate the thickness of the sheet by measuring the curvature of the sheet in the image: for any one composition and environmental condition combination, the thicker the sheet, the less it would curve.
  2 个评论
Fangjun Jiang
Fangjun Jiang 2011-9-28
Good lecture, Prof. Roberson!
Walter Roberson
Walter Roberson 2011-9-28
Please -- my proper title is Scientific Numerologist and Analyst of Fundamental Uncertainties.

请先登录，再进行评论。

the cyclist
the cyclist 2011-9-28
estimatedThickness = 1; % Arbitrary units
Image Analyst
Image Analyst 2011-9-28
Well it looks just like a piece of paper I have here. Believe it or not I have a micrometer here (it's true) and I measure my paper at 0.04 inches. So I think your paper must be the same thickness. If you don't believe me then prove it by providing something - some extra information to disprove what I said.
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2011-9-28
Your paper is probably .0038", which would be "20 pound" paper.
Walter Roberson
Walter Roberson 2011-9-29
Closest I was able to get with mine was 0.0042 minus an indeterminate zeroing error that could be as high as 0.001.
http://www.practicalmachinist.com/vb/antique-machinery-history/slocomb-micrometer-repair-185226/

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by