グラデーション画像を作成

create_gray_bar.py

#! /usr/bin/env python
# coding: utf-8

from PIL import Image
from PIL import ImageDraw

screenW = 640
screenH = 50

img = Image.new('RGBA', (screenW, screenH), (255,255,255,0))
draw = ImageDraw.Draw(img)
draw.rectangle(((0, 0), (img.size[0]-1, img.size[1]-1)), outline='red')

maxX = screenW-2
for v in range(maxX):
	g = int(v/(maxX-1)*255)
	print(g)
	x = v + 1
	draw.line((x, 1, x, screenH-2), fill=(g, g, g))
img.save("test.png");