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python-cheatsheet
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Image, Animation

pull/135/head
Jure Šorn 2 years ago
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2 changed files with 10 additions and 10 deletions
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  1. 8
      README.md
  2. 12
      index.html

8
README.md
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@ -2742,8 +2742,8 @@ from PIL import Image
```python
<int/tuple> = <Image>.getpixel((x, y)) # Returns a pixel.
<Image>.putpixel((x, y), <int/tuple>) # Writes a pixel to the image.
<ImagingCore> = <Image>.getdata() # Returns a sequence of pixels.
<Image>.putdata(<list/ImagingCore>) # Writes a sequence of pixels.
<ImagingCore> = <Image>.getdata() # Returns a flattened sequence of pixels.
<Image>.putdata(<list/ImagingCore>) # Writes a flattened sequence of pixels.
<Image>.paste(<Image>, (x, y)) # Writes an image to the image.
```
@ -2807,11 +2807,11 @@ Animation
# $ pip3 install imageio
from PIL import Image, ImageDraw
import imageio
WIDTH, R = 126, 10
WIDTH, HEIGHT, R = 126, 126, 10
frames = []
for velocity in range(1, 16):
y = sum(range(velocity))
frame = Image.new('L', (WIDTH, WIDTH))
frame = Image.new('L', (WIDTH, HEIGHT))
draw = ImageDraw.Draw(frame)
draw.ellipse((WIDTH/2-R, y, WIDTH/2+R, y+R*2), fill='white')
frames.append(frame)

12
index.html
View File

@ -54,7 +54,7 @@
<body>
<header>
<aside>June 1, 2022</aside>
<aside>June 2, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -2230,8 +2230,8 @@ right = [[<span class="hljs-number">0.1</span>, <span class="hljs-number">0.6</s
</code></pre>
<pre><code class="python language-python hljs">&lt;int/tuple&gt; = &lt;Image&gt;.getpixel((x, y)) <span class="hljs-comment"># Returns a pixel.</span>
&lt;Image&gt;.putpixel((x, y), &lt;int/tuple&gt;) <span class="hljs-comment"># Writes a pixel to the image.</span>
&lt;ImagingCore&gt; = &lt;Image&gt;.getdata() <span class="hljs-comment"># Returns a sequence of pixels.</span>
&lt;Image&gt;.putdata(&lt;list/ImagingCore&gt;) <span class="hljs-comment"># Writes a sequence of pixels.</span>
&lt;ImagingCore&gt; = &lt;Image&gt;.getdata() <span class="hljs-comment"># Returns a flattened sequence of pixels.</span>
&lt;Image&gt;.putdata(&lt;list/ImagingCore&gt;) <span class="hljs-comment"># Writes a flattened sequence of pixels.</span>
&lt;Image&gt;.paste(&lt;Image&gt;, (x, y)) <span class="hljs-comment"># Writes an image to the image.</span>
</code></pre>
<pre><code class="bash language-bash hljs">&lt;2d_array&gt; = np.array(&lt;Image_L&gt;) <span class="hljs-comment"># Creates NumPy array from greyscale image.</span>
@ -2282,11 +2282,11 @@ img.convert(<span class="hljs-string">'RGB'</span>).save(<span class="hljs-strin
<div><h2 id="animation"><a href="#animation" name="animation">#</a>Animation</h2><div><h4 id="createsagifofabouncingball">Creates a GIF of a bouncing ball:</h4><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install imageio</span>
<span class="hljs-keyword">from</span> PIL <span class="hljs-keyword">import</span> Image, ImageDraw
<span class="hljs-keyword">import</span> imageio
WIDTH, R = <span class="hljs-number">126</span>, <span class="hljs-number">10</span>
WIDTH, HEIGHT, R = <span class="hljs-number">126</span>, <span class="hljs-number">126</span>, <span class="hljs-number">10</span>
frames = []
<span class="hljs-keyword">for</span> velocity <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">16</span>):
y = sum(range(velocity))
frame = Image.new(<span class="hljs-string">'L'</span>, (WIDTH, WIDTH))
frame = Image.new(<span class="hljs-string">'L'</span>, (WIDTH, HEIGHT))
draw = ImageDraw.Draw(frame)
draw.ellipse((WIDTH/<span class="hljs-number">2</span>-R, y, WIDTH/<span class="hljs-number">2</span>+R, y+R*<span class="hljs-number">2</span>), fill=<span class="hljs-string">'white'</span>)
frames.append(frame)
@ -2896,7 +2896,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer>
<aside>June 1, 2022</aside>
<aside>June 2, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

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