python以环状形式组合排列图片并输出的方法

本文实例讲述了python以环状形式组合排列图片并输出的方法。分享给大家供大家参考。具体分析如下：

这段代码可以自定义一个空白画板，然后将指定的图片以圆环状的方式排列起来，用到了pil库，可以通过：
pip install pil 的方式安装。

具体代码如下：

# -*- coding: utf-8 -*-

__author__ = '3water.com'

import math

from PIL import Image

def arrangeImagesInCircle(masterImage, imagesToArrange):

    imgWidth, imgHeight = masterImage.size

    #we want the circle to be as large as possible.

    #but the circle shouldn't extend all the way to the edge of the image.

    #If we do that, then when we paste images onto the circle, those images will partially fall over the edge.

    #so we reduce the diameter of the circle by the width/height of the widest/tallest image.

    diameter = min(

        imgWidth  - max(img.size[0] for img in imagesToArrange),

        imgHeight - max(img.size[1] for img in imagesToArrange)

    )

    radius = diameter / 2

    circleCenterX = imgWidth  / 2

    circleCenterY = imgHeight / 2

    theta = 2*math.pi / len(imagesToArrange)

    for i in range(len(imagesToArrange)):

        curImg = imagesToArrange[i]

        angle = i * theta

        dx = int(radius * math.cos(angle))

        dy = int(radius * math.sin(angle))

        #dx and dy give the coordinates of where the center of our images would go.

        #so we must subtract half the height/width of the image to find where their top-left corners should be.

        pos = (

            circleCenterX + dx - curImg.size[0]/2,

            circleCenterY + dy - curImg.size[1]/2

        )

        masterImage.paste(curImg, pos)

img = Image.new("RGB", (500,500), (255,255,255))

#下面的三个图片是3个 50x50 的pngs 图片，使用了绝对路径，需要自己进行替换成你的图片路径

imageFilenames = ["d:/3water.com/images/1.png", "d:/3water.com/images/2.png", "d:/3water.com/images/3.png"] * 5

images = [Image.open(filename) for filename in imageFilenames]

arrangeImagesInCircle(img, images)

img.save("output.png")

希望本文所述对大家的Python程序设计有所帮助。