File:Rectified_waves.png
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![File:Rectified waves.png](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Rectified_waves.png/800px-Rectified_waves.png)
原始文件 (1,160 × 860像素,文件大小:87 KB,MIME类型:image/png)
摘要
描述Rectified waves.png |
English: Full and half-wave rectification of a sinusoidal wave (3 cycles). This shows a sine wave, then half-wave and full-wave rectified versions of it.
Русский: Одно- и двухполупериодное выпрямление синусоидального напряжения |
日期 | |
来源 | 自己的作品 |
作者 | Omegatron |
其他版本 |
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File:Rectification.svg是此文件的矢量版本。 应当将此点阵图片替换为该文件。
File:Rectified waves.png → File:Rectification.svg
更多信息请参阅Help:SVG/zh。
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Instructions
See Wikipedia graph-making tips.
Then I opened the rectified_waves.ps file in a text editor to edit the line colors and linestyles, as per this description archive copy at the Wayback Machine. This avoids needing to open in proprietary software, and really isn't that difficult (especially if you don't know the commands in the proprietary software either). ;-) Identify the lines easily by their color (the arrow is currently magenta and I want it to be black. Ah, there is the entry with 1 0 1, red + blue = magenta) or by using the gnuplot linestyle−1. (For instance, gnuplot's linestyle 3 corresponds to the ps file's /LT2.) Then you can edit the colors and dashes by hand.
I changed the original:
/LT1 { PL [4 dl 2 dl] 0 1 0 DL } def
into this:
/LT1 { PL [4 dl 2 dl] 0 0.7 0 DL } def
to make the green a little less neon.
To convert the PostScript file to PNG:
- Open it in the GIMP (make sure you have ghostscript installed! - Windows instructions)
- Enter 500 under Resolution (it doesn't say "DPI" but I think that's what it means)
- Uncheck Try bounding box (since the bounding box cuts off the edge, unfortunately. You can try with the bounding box first.)
- Enter large values for Width and Height
- Check Color
- Check Strong anti-aliasing for both graphics and text
- Crop off extra whitespace (Shift+C if you can't find it in the toolbox)
- Possibly need to rotate it: Click Image → Transform → Rotate 90 degrees clockwise
Filters → Blur → Gaussian blur at 2.0 px(No need to blur if you use strong anti-aliasing during conversion. I see no significant difference between end results.)- Image → Scale Image...
- Width and Height at 25%
- Cubic interpolation
- You can view at normal size if you want by pressing 1, Ctrl+E
- Save as Rectified waves.png
Created by User:Omegatron using gnuplot, possibly with post-processing in the GIMP (PNG) or Inkscape (SVG)
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已授权您依据自由软件基金会发行的无固定段落及封面封底文字(Invariant Sections, Front-Cover Texts, and Back-Cover Texts)的GNU自由文件许可协议1.2版或任意后续版本的条款,复制、传播和/或修改本文件。该协议的副本请见“GNU Free Documentation License”。http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
(In short, this means that you can copy and modify the image freely as long as you provide attribution; preferably in the form of a link back to this page.)
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知识共享署名-相同方式共享2.0通用 简体中文(已转写)
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文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2005年8月29日 (一) 01:56 | ![]() | 1,160 × 860(87 KB) | Omegatron |
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