richard
/
python-cheatsheet
mirror of https://github.com/gto76/python-cheatsheet.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

Image

pull/42/head
Jure Šorn 5 years ago
parent
7ef812d90a
commit
d890a8a385
2 changed files with 75 additions and 17 deletions
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 45
      README.md
  2. 47
      index.html

45
README.md
View File

@ -2564,6 +2564,44 @@ Image
from PIL import Image from PIL import Image
``` ```
```python
<Image> = Image.new('<mode>', (width, height))
<Image> = Image.open('<path>')
<Image> = <Image>.convert(mode='<mode>')
<Image>.save('<path>')
<Image>.show()
```
```python
<tuple/int> = img.getpixel((x, y)) # Returns a pixel.
<Image>.putpixel((x, y), <tuple/int>) # Writes tuple/int to image.
<ImagingCore> = <Image>.getdata() # Returns a sequence of tuples/ints.
<Image>.putdata(<list/tuple>) # Writes a sequence of tuples/ints.
<Image>.paste(<Image>, (x, y)) # Writes an image to image.
```
### Modes
* **`'1'` - 1-bit pixels, black and white, stored with one pixel per byte.**
* **`'L'` - 8-bit pixels, greyscale.**
* **`'RGB'` - 3x8-bit pixels, true color.**
* **`'RGBA'` - 4x8-bit pixels, true color with transparency mask.**
* **`'HSV'` - 3x8-bit pixels, Hue, Saturation, Value color space.**
### ImageDraw
```python
from PIL import ImageDraw
<ImageDraw> = ImageDraw.Draw(<Image>)
<ImageDraw>.point((x, y), fill=None)
<ImageDraw>.line((x1, y1, x2, y2 [, ...]), fill=None, width=0, joint=None)
<ImageDraw>.arc((x1, y1, x2, y2), from_deg, to_deg, fill=None, width=0)
<ImageDraw>.rectangle((x1, y1, x2, y2), fill=None, outline=None, width=0)
<ImageDraw>.polygon((x1, y1, x2, y2 [, ...]), fill=None, outline=None)
<ImageDraw>.ellipse((x1, y1, x2, y2), fill=None, outline=None, width=0)
```
* **Use `'fill=<color>'` to set the primary color.**
* **Use `'outline=<color>'` to set the secondary color.**
* **Colors can be specified as tuple, int, `'#rrggbb'` string or a color name.**
### Examples ### Examples
#### Creates a PNG image of a rainbow gradient: #### Creates a PNG image of a rainbow gradient:
```python ```python
@ -2584,13 +2622,6 @@ img.putdata([(add_noise(h), s, v) for h, s, v in img.getdata()])
img.convert(mode='RGB').save('test.png') img.convert(mode='RGB').save('test.png')
``` ```
### Modes
* **`'1'` - 1-bit pixels, black and white, stored with one pixel per byte.**
* **`'L'` - 8-bit pixels, greyscale.**
* **`'RGB'` - 3x8-bit pixels, true color.**
* **`'RGBA'` - 4x8-bit pixels, true color with transparency mask.**
* **`'HSV'` - 3x8-bit pixels, Hue, Saturation, Value color space.**
### Animation ### Animation
#### Creates a GIF of a bouncing ball: #### Creates a GIF of a bouncing ball:
```python ```python

47
index.html
View File

@ -2183,6 +2183,41 @@ right = [[<span class="hljs-number">0.1</span>, <span class="hljs-number">0.6</s
<span class="hljs-keyword">from</span> PIL <span class="hljs-keyword">import</span> Image <span class="hljs-keyword">from</span> PIL <span class="hljs-keyword">import</span> Image
</code></pre></div> </code></pre></div>
<pre><code class="python language-python hljs">&lt;Image&gt; = Image.new(<span class="hljs-string">'&lt;mode&gt;'</span>, (width, height))
&lt;Image&gt; = Image.open(<span class="hljs-string">'&lt;path&gt;'</span>)
&lt;Image&gt; = &lt;Image&gt;.convert(mode=<span class="hljs-string">'&lt;mode&gt;'</span>)
&lt;Image&gt;.save(<span class="hljs-string">'&lt;path&gt;'</span>)
&lt;Image&gt;.show()
</code></pre>
<pre><code class="python language-python hljs">&lt;tuple/int&gt; = img.getpixel((x, y)) <span class="hljs-comment"># Returns a pixel.</span>
&lt;Image&gt;.putpixel((x, y), &lt;tuple/int&gt;) <span class="hljs-comment"># Writes tuple/int to image.</span>
&lt;ImagingCore&gt; = &lt;Image&gt;.getdata() <span class="hljs-comment"># Returns a sequence of tuples/ints.</span>
&lt;Image&gt;.putdata(&lt;list/tuple&gt;) <span class="hljs-comment"># Writes a sequence of tuples/ints.</span>
&lt;Image&gt;.paste(&lt;Image&gt;, (x, y)) <span class="hljs-comment"># Writes an image to image.</span>
</code></pre>
<div><h3 id="modes-1">Modes</h3><ul>
<li><strong><code class="python hljs"><span class="hljs-string">'1'</span></code> - 1-bit pixels, black and white, stored with one pixel per byte.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'L'</span></code> - 8-bit pixels, greyscale.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'RGB'</span></code> - 3x8-bit pixels, true color.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'RGBA'</span></code> - 4x8-bit pixels, true color with transparency mask.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'HSV'</span></code> - 3x8-bit pixels, Hue, Saturation, Value color space.</strong></li>
</ul><div><h3 id="imagedraw">ImageDraw</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> PIL <span class="hljs-keyword">import</span> ImageDraw
&lt;ImageDraw&gt; = ImageDraw.Draw(&lt;Image&gt;)
&lt;ImageDraw&gt;.point((x, y), fill=<span class="hljs-keyword">None</span>)
&lt;ImageDraw&gt;.line((x1, y1, x2, y2 [, ...]), fill=<span class="hljs-keyword">None</span>, width=<span class="hljs-number">0</span>, joint=<span class="hljs-keyword">None</span>)
&lt;ImageDraw&gt;.arc((x1, y1, x2, y2), from_deg, to_deg, fill=<span class="hljs-keyword">None</span>, width=<span class="hljs-number">0</span>)
&lt;ImageDraw&gt;.rectangle((x1, y1, x2, y2), fill=<span class="hljs-keyword">None</span>, outline=<span class="hljs-keyword">None</span>, width=<span class="hljs-number">0</span>)
&lt;ImageDraw&gt;.polygon((x1, y1, x2, y2 [, ...]), fill=<span class="hljs-keyword">None</span>, outline=<span class="hljs-keyword">None</span>)
&lt;ImageDraw&gt;.ellipse((x1, y1, x2, y2), fill=<span class="hljs-keyword">None</span>, outline=<span class="hljs-keyword">None</span>, width=<span class="hljs-number">0</span>)
</code></pre></div></div>
<ul>
<li><strong>Use <code class="python hljs"><span class="hljs-string">'fill=&lt;color&gt;'</span></code> to set the primary color.</strong></li>
<li><strong>Use <code class="python hljs"><span class="hljs-string">'outline=&lt;color&gt;'</span></code> to set the secondary color.</strong></li>
<li><strong>Colors can be specified as tuple, int, <code class="python hljs"><span class="hljs-string">'#rrggbb'</span></code> string or a color name.</strong></li>
</ul>
<div><h3 id="examples">Examples</h3><div><h4 id="createsapngimageofarainbowgradient">Creates a PNG image of a rainbow gradient:</h4><pre><code class="python language-python hljs">WIDTH, HEIGHT = <span class="hljs-number">100</span>, <span class="hljs-number">100</span> <div><h3 id="examples">Examples</h3><div><h4 id="createsapngimageofarainbowgradient">Creates a PNG image of a rainbow gradient:</h4><pre><code class="python language-python hljs">WIDTH, HEIGHT = <span class="hljs-number">100</span>, <span class="hljs-number">100</span>
size = WIDTH * HEIGHT size = WIDTH * HEIGHT
hue = [<span class="hljs-number">255</span> * i/size <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(size)] hue = [<span class="hljs-number">255</span> * i/size <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(size)]
@ -2199,13 +2234,7 @@ img.putdata([(add_noise(h), s, v) <span class="hljs-keyword">for</span> h, s, v
img.convert(mode=<span class="hljs-string">'RGB'</span>).save(<span class="hljs-string">'test.png'</span>) img.convert(mode=<span class="hljs-string">'RGB'</span>).save(<span class="hljs-string">'test.png'</span>)
</code></pre></div> </code></pre></div>
<div><h3 id="modes-1">Modes</h3><ul>
<li><strong><code class="python hljs"><span class="hljs-string">'1'</span></code> - 1-bit pixels, black and white, stored with one pixel per byte.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'L'</span></code> - 8-bit pixels, greyscale.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'RGB'</span></code> - 3x8-bit pixels, true color.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'RGBA'</span></code> - 4x8-bit pixels, true color with transparency mask.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'HSV'</span></code> - 3x8-bit pixels, Hue, Saturation, Value color space.</strong></li>
</ul><div><h3 id="animation">Animation</h3><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>
<div><h3 id="animation">Animation</h3><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">from</span> PIL <span class="hljs-keyword">import</span> Image, ImageDraw
<span class="hljs-keyword">import</span> imageio <span class="hljs-keyword">import</span> imageio
WIDTH, R = <span class="hljs-number">126</span>, <span class="hljs-number">10</span> WIDTH, R = <span class="hljs-number">126</span>, <span class="hljs-number">10</span>
@ -2218,9 +2247,7 @@ frames = []
frames.append(frame) frames.append(frame)
frames += reversed(frames[<span class="hljs-number">1</span>:<span class="hljs-number">-1</span>]) frames += reversed(frames[<span class="hljs-number">1</span>:<span class="hljs-number">-1</span>])
imageio.mimsave(<span class="hljs-string">'test.gif'</span>, frames, duration=<span class="hljs-number">0.03</span>) imageio.mimsave(<span class="hljs-string">'test.gif'</span>, frames, duration=<span class="hljs-number">0.03</span>)
</code></pre></div></div></div>
</code></pre></div></div>
<div><h2 id="audio"><a href="#audio" name="audio">#</a>Audio</h2><pre><code class="python language-python hljs"><span class="hljs-keyword">import</span> wave <div><h2 id="audio"><a href="#audio" name="audio">#</a>Audio</h2><pre><code class="python language-python hljs"><span class="hljs-keyword">import</span> wave

Write Preview
Loading…
Cancel
Save