From f7caf5e44c62ffb95d1ac82ebd9f380d0e87614c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jure=20=C5=A0orn?= Date: Sat, 17 Aug 2019 15:18:29 +0200 Subject: [PATCH] Image --- README.md | 22 +++++++++++----------- index.html | 25 +++++++++++++------------ 2 files changed, 24 insertions(+), 23 deletions(-) diff --git a/README.md b/README.md index d1b4f33..4ebe44c 100644 --- a/README.md +++ b/README.md @@ -2562,14 +2562,15 @@ Image from PIL import Image ``` +### Examples #### Creates a PNG image of a rainbow gradient: ```python -width = 100 -height = 100 -size = width * height -pixels = [255 * i/size for i in range(size)] +WIDTH = 100 +HEIGHT = 100 +SIZE = WIDTH * HEIGHT +pixels = [255 * i/SIZE for i in range(SIZE)] -img = Image.new('HSV', (width, height)) +img = Image.new('HSV', (WIDTH, HEIGHT)) img.putdata([(int(a), 255, 255) for a in pixels]) img.convert(mode='RGB').save('test.png') ``` @@ -2591,18 +2592,17 @@ img.convert(mode='RGB').save('test.png') * **`'HSV'` - 3x8-bit pixels, Hue, Saturation, Value color space.** ### Animation - #### Creates a GIF of a bouncing ball: ```python from PIL import Image, ImageDraw import imageio -height, r = 126, 10 +HEIGHT, R = 126, 10 frames = [] -for velocity in range(1, 16): - y = sum(range(velocity)) - frame = Image.new('L', (height, height)) +for velocity in range(15): + y = sum(range(velocity+1)) + frame = Image.new('L', (HEIGHT, HEIGHT)) draw = ImageDraw.Draw(frame) - draw.ellipse((height/2-r, y, height/2+r, y+2*r), fill='white') + draw.ellipse((HEIGHT/2-R, y, HEIGHT/2+R, y+2*R), fill='white') frames.append(frame) frames += reversed(frames[1:-1]) imageio.mimsave('test.gif', frames, duration=0.03) diff --git a/index.html b/index.html index b8fcc77..a5b3738 100644 --- a/index.html +++ b/index.html @@ -2181,15 +2181,16 @@ right = [[0.1, 0.6from PIL import Image -

Creates a PNG image of a rainbow gradient:

width  = 100
-height = 100
-size   = width * height
-pixels = [255 * i/size for i in range(size)]
+
Examples
Creates a PNG image of a rainbow gradient:
WIDTH  = 100
+HEIGHT = 100
+SIZE   = WIDTH * HEIGHT
+pixels = [255 * i/SIZE for i in range(SIZE)]
 
-img = Image.new('HSV', (width, height))
+img = Image.new('HSV', (WIDTH, HEIGHT))
 img.putdata([(int(a), 255, 255) for a in pixels])
 img.convert(mode='RGB').save('test.png')
-

+
+

Adds noise to a PNG image:

from random import randint
 add_noise = lambda value: max(0, min(255, value + randint(-20, 20)))
@@ -2206,13 +2207,13 @@ img.convert(mode='RGB').save('HSV' - 3x8-bit pixels, Hue, Saturation, Value color space.
 
Animation
Creates a GIF of a bouncing ball:
from PIL import Image, ImageDraw
 import imageio
-height, r = 126, 10
+HEIGHT, R = 126, 10
 frames = []
-for velocity in range(1, 16):
-    y = sum(range(velocity))
-    frame = Image.new('L', (height, height))
+for velocity in range(15):
+    y = sum(range(velocity+1))
+    frame = Image.new('L', (HEIGHT, HEIGHT))
     draw  = ImageDraw.Draw(frame)
-    draw.ellipse((height/2-r, y, height/2+r, y+2*r), fill='white')
+    draw.ellipse((HEIGHT/2-R, y, HEIGHT/2+R, y+2*R), fill='white')
     frames.append(frame)
 frames += reversed(frames[1:-1])
 imageio.mimsave('test.gif', frames, duration=0.03)
@@ -2240,7 +2241,7 @@ imageio.mimsave('test.gif', frames, duration=b''.join(frames_short))
 

 
-
Examples
Saves a sine wave to a mono WAV file:
from math import pi, sin
+
Examples
Saves a sine wave to a mono WAV file:
from math import pi, sin
 frames_f = (sin(i * 2 * pi * 440 / 44100) for i in range(100000))
 frames_i = (int(a * 30000) for a in frames_f)
 write_to_wav_file('test.wav', frames_i)