File:Kochsim.gif
維基百科,自由的 encyclopedia
Kochsim.gif (200 × 100 像素,檔案大小:4 KB,MIME 類型:image/gif、循環、9 畫格、0.9秒)
摘要
描述Kochsim.gif | A Koch curve has an infinitely repeating self-similarity when it is magnified. |
日期 | |
來源 | en:Image:Kochsim.gif |
作者 | en:User:Cuddlyable3 |
授權許可 (重用此檔案) |
PD-self |
About this image
I made this animation Cuddlyable3 15:36, 13 March 2007 (UTC) The Koch curve, in its fully (infinitely) iterated form is not a line that anyone has ever seen! That is to say, it is not like any of the lines that we are familiar with in Euclidean geometry because it somehow spans a finite distance while being infinitely long. The cross-section of an ordinary 2-D line is a point, but the cross-section of the Koch curve would have to be a probability distribution. That makes displaying the Koch curve challenging and we may need to rethink what we mean by aliasing error. The quantising imposed to make this animation is:
- Resolution: 200 x 100 pixels
- Colours: Just 2 i.e. monochrome
- Time: 10 frames that recycle at 10 frames/second
Each of the above is a potential source of aliasing error, but I think the dominant cause of comments about this is the restricted colour scale. Any pixel that the Koch "distribution" touches, no matter how slightly, is painted black. It is that simple.
Other details of this animation:
- the line actually drawn is first described numerically by 4097 points i.e. a it is a highly developed but not infinite Koch curve. This model exceeds the display resolution so much that I am sure that further Koch iteration would make no difference.
- the points are joined in order by the Bresenham line-drawing algorithm. At this scale I think I would have got exactly the same result by merely plotting the points because there is no line span long enough for the B. algorithm to paint intermediate points, but now you know what I told the computer to do.
- the animation was assembled using The Gimp software into a .gif file of only 4 331 bytes.
Finally, I judiciously panned the view of the sequence so the last frame smoothly recycles to the first frame i.e. the center of the curve seems to remain still. Although that gives a nice subjective effect, it may encourage a misinterpretation that forms are being emitted from the center. What you see is really just a zoom and pan view of a strange but static "self-similar" object.Cuddlyable3 19:14, 7 May 2007 (UTC)
^I got rid of the deprecated tag, and I'll add this tag. Plus, nominated for featured.Temperalxy 19:12, 6 May 2007 (UTC)
See my Discussion page for some variations of this animation. Cuddlyable3 19:07, 2 June 2007 (UTC)
授權條款
Public domainPublic domainfalsefalse |
我,此作品的版權所有人,釋出此作品至公共領域。此授權條款在全世界均適用。 這可能在某些國家不合法,如果是的話: 我授予任何人有權利使用此作品於任何用途,除受法律約束外,不受任何限制。 |
在此檔案描寫的項目
描繪內容
著作權狀態 繁體中文 (已轉換拼寫)
保有知識產權並由其所有者公開於公有領域 繁體中文 (已轉換拼寫)
著作權持有者釋出至公有領域 繁體中文 (已轉換拼寫)
13 3 2007
檔案歷史
點選日期/時間以檢視該時間的檔案版本。
日期/時間 | 縮圖 | 尺寸 | 用戶 | 備註 | |
---|---|---|---|---|---|
目前 | 2007年4月7日 (六) 09:06 | 200 × 100(4 KB) | Lerdsuwa | {{Information |Description=A Koch curve has an infinitely repeating self-similarity when it is magnified. |Source=en:Image:Kochsim.gif |Date=13 March 2007 |Author=en:User:Cuddlyable3 |Permission=PD-self |other_versions= }} |
檔案用途
下列頁面有用到此檔案:
全域檔案使用狀況
以下其他 wiki 使用了這個檔案:
- bs.wikipedia.org 的使用狀況
- ca.wikipedia.org 的使用狀況
- de.wikipedia.org 的使用狀況
- en.wikipedia.org 的使用狀況
- Koch snowflake
- Scale invariance
- User talk:Drumguy8800
- User talk:Cuddlyable3
- Wikipedia:Featured picture candidates/May-2007
- Wikipedia:Featured picture candidates/Kochsim
- User:AnonymousFish/Sandbox
- Wikipedia:Reference desk/Archives/Miscellaneous/2013 April 12
- Wikipedia:Reference desk/Archives/Science/2013 December 10
- en.wikiquote.org 的使用狀況
- es.wikipedia.org 的使用狀況
- eu.wikipedia.org 的使用狀況
- fi.wikipedia.org 的使用狀況
- frr.wikipedia.org 的使用狀況
- fr.wikipedia.org 的使用狀況
- he.wikipedia.org 的使用狀況
- hr.wikipedia.org 的使用狀況
- it.wikipedia.org 的使用狀況
- it.wikibooks.org 的使用狀況
- ko.wikipedia.org 的使用狀況
- no.wikipedia.org 的使用狀況
- pl.wikipedia.org 的使用狀況
- pt.wikipedia.org 的使用狀況
- ru.wikipedia.org 的使用狀況
- sh.wikipedia.org 的使用狀況
- sl.wikipedia.org 的使用狀況
- sv.wikipedia.org 的使用狀況
- th.wikipedia.org 的使用狀況
- vi.wikipedia.org 的使用狀況
- www.wikidata.org 的使用狀況