PIL使用小结(crop和paste函数)

xiaoxiao2024-10-27  12

PIL(Python Imaging Library)是python语言中对图像处理方面的一个开源库,其主要功能模块为Image,对于Image模块,可以使用

from PIL import Image

或者

import Image

 由于使用了试用版的chartdir库,在生成图片的时候下面会出现一行提示是非注册版的文字,看起来不太舒服。

 

所以想使用PIL自动地将下面一行去掉,查阅了一下PIL的文档,最后决定使用PIL的crop和paste函数实现功能

实现的代码如下:

import Image import sys if len(sys.argv)<2: print '%s <image file>' % __file__ sys.exit() else: filename = sys.argv[1] img = Image.open(filename) width = img.size[0] height = img.size[1] img1 = img.crop((0,0,width,9)) #img1 = Image.new('RGBA',(width,10)) img.paste(img1,(0,height-9)) img.save(filename) img = Image.open(filename) img.show()

 这可以使用的方法有两种,第一种是以及被注释掉的方法,即生成一个新的Image,调用Image.new方法。然后将该image粘贴到需要修改的图片上。另外一种为了保持图片的前后背景色一致,从图片的最前头拷贝一部分图片(使用crop函数),然后在粘贴到需要修改的图片上,来完成最下端文字的覆盖。

 

crop函数带的参数为(起始点的横坐标,起始点的纵坐标,宽度,高度)

paste函数的参数为(需要修改的图片,粘贴的起始点的横坐标,粘贴的起始点的纵坐标)

 

下面是处理结果之后的图片:

 

PS.使用chartdir生成图片的Python脚本

#!-*- encoding: utf-8 -*- #!/usr/bin/python from pychartdir import * # The data for the bar chart data = [450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700, 3200, 3800] # The labels for the bar chart labels = ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"] # Create a XYChart object of size 600 x 360 pixels c = XYChart(600, 360) # Add a title to the chart using 18pts Times Bold Italic font c.addTitle("卖家月份销售图表", "simsun.ttc", 18) # Set the plotarea at (60, 40) and of size 500 x 280 pixels. Use a vertical gradient # color from light blue (eeeeff) to deep blue (0000cc) as background. Set border and # grid lines to white (ffffff). c.setPlotArea(60, 40, 500, 280, c.linearGradientColor(60, 40, 60, 280, 0xeeeeff, 0x0000cc), -1, 0xffffff, 0xffffff) # Add a multi-color bar chart layer using the supplied data. Use soft lighting effect # with light direction from left. c.addBarLayer3(data).setBorderColor(Transparent, softLighting(Left)) # Set x axis labels using the given labels c.xAxis().setLabels(labels) # Draw the ticks between label positions (instead of at label positions) c.xAxis().setTickOffset(0.5) # Add a title to the y axis with 10pts Arial Bold font c.yAxis().setTitle("人民币 (元)", "simsun.ttc", 10) # Set axis label style to 8pts Arial Bold c.xAxis().setLabelStyle("simsun.ttc", 8) c.yAxis().setLabelStyle("simsun.ttc", 8) # Set axis line width to 2 pixels c.xAxis().setWidth(2) c.yAxis().setWidth(2) # Output the chart c.makeChart("1.png")  

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