zoukankan      html  css  js  c++  java
  • python图像处理库Pillow基本使用方法

    安装pillow

    pillow的文档页面,documentation of Pillow

    生成一个有单一颜色的图像

    from PIL import Image, ImageDraw
    img = Image.new(mode, size, color)
    img.save(filename)

    There are various values for mode listed in the documentation of Pillow. For example RGB and RGBA can be modes. The size is a tuple in the form of (width, height) in pixels. The color can be a word such as 'red', or a triplet for RGB colors of 3 values between 0-255.

    例子

    from PIL import Image
     
    img = Image.new('RGB', (60, 30), color = 'red')
    img.save('pil_red.png')

    使用RGB三个数值创建颜色

    from PIL import Image
     
    img = Image.new('RGB', (60, 30), color = (73, 109, 137))
    img.save('pil_color.png')

    在图像上写字

    from PIL import Image, ImageDraw
     
    img = Image.new('RGB', (100, 30), color = (73, 109, 137))
     
    d = ImageDraw.Draw(img)
    d.text((10,10), "Hello World", fill=(255,255,0))
     
    img.save('pil_text.png')

    换不同的字体

    There are a number of ways to select the font used for writing on the image. We need to import and use the ImageFont to load a TrueType font. Mac OSX supplies a bunch of fonts that are located in the /Library/Fonts/. On other platforms you'll need to locate the files yourself and then pass the full path to the function. Alternatively you could include the font-file in your application and then you can know where is the font-file relative to your code.

    In this example we load the font using the truetype method of the ImageFont passing to it the path to the fonts and the size of the fonts to be loaded.

    from PIL import Image, ImageDraw, ImageFont
     
    img = Image.new('RGB', (100, 30), color = (73, 109, 137))
     
    fnt = ImageFont.truetype('/Library/Fonts/Arial.ttf', 15)
    d = ImageDraw.Draw(img)
    d.text((10,10), "Hello world", font=fnt, fill=(255, 255, 0))
     
    img.save('pil_text_font.png')
  • 相关阅读:
    [git 学习篇] git commit原理 --实践体会
    [git 学习篇]工作区和暂存区
    [git 学习篇] git文件版本回退再学习
    [git 学习篇]版本回退
    [git 学习篇] 修改文件
    [git 学习篇] 提交文件
    [git 学习篇] --创建git创库
    [测试框架学习] 测试框架的结构包含
    [python测试框架] http接口测试框架
    向SharePoint页面添加后台代码
  • 原文地址:https://www.cnblogs.com/roadwide/p/10353038.html
Copyright © 2011-2022 走看看