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)