我一直在使用turtle模块,并希望以此为起点来开发可以识别数字/字母的简单图像识别程序.我需要能够将乌龟另存为可以操纵的图像,例如重新缩放,旋转等,以尝试调整图像.我已经研究了几个小时,似乎找不到任何有效的方法.我发现了如何将Turtle输出另存为Tkinter画布:
I've been working with the turtle module and want to use it as a starting point to work on a simple image recognition program that could recognize numbers/letters. I need to be able to save the turtle as an image I could manipulate- recaling, rotating, etc. to try to regulate the images. I've been researching for hours and cannot seem to find anything that works. I have discovered how to save the Turtle output as a Tkinter canvas:
import turtle t = turtle.Turtle() # Draw something canvas = t.getscreen().getcanvas() # Saves a Tkinter canvas object这似乎很棒.下一步是将其另存为.png或.jpg.但是,我唯一能找到的就是如何将其另存为Postscript文件:
This seems to work great. The next step is to save that as a .png or .jpg. However, the only thing I can find is how to save it as a postscript file:
canvas.postscript(file="turtle_img.ps") # Saves as a .ps file从那里,我尝试使用PIL将.ps文件转换为.png或.jpeg文件.这是我的代码以及出现的错误:
From there, I have attempted to convert the .ps file into a .png or .jpeg file using PIL. Here is my code for that and the error that I get:
from PIL import Image turtle_img = Image.open("turtle_img.ps") turtle_img.save("turtle_img", "png") # Also tried: turtle_img.save("turtle_img, "jpeg")运行"turtle_img.save("turtle_img","png")行会产生:
Running the line "turtle_img.save("turtle_img", "png") produces:
OSError: Unable to locate Ghostscript on paths我会喜欢以下之一: 1.一种将.ps转换为.jpeg,.png甚至位图的方法 2.另一种保存Tkinter画布的方法,更易于使用
I would love one of the following: 1. a way to convert a .ps into a .jpeg, .png, or even a bitmap 2. An alternate way of saving a Tkinter canvas that is easier to work with
我想澄清一下,我将使用大量此类文件,并且希望在脚本中自动执行该过程,而不是对每个图像使用命令行.
I wanted to clarify that I would be working with a large number of these and would like to automate the process in a script rather than use the command line for each image.
所有答案将不胜感激!预先谢谢你.
All answers will be appreciated! Thankyou in advance.
推荐答案您可以使用Ghostscript将PostScript程序呈现为位图.例如:
You can use Ghostscript to render a PostScript program to a bitmap. For example:
gs -sDEVICE=png16m -o out.png input.ps还有其他可用的文件格式和颜色深度,例如png256,jpeg等.如果是多页输入文件,则:
There are other file formats and colour depths available, such as png256, jpeg etc. If its a multi-page input file then:
gs -sDEVICE=png16m -o out%d.png input.ps更多推荐
如何在Python 3中将Turtle画布另存为图像(.png或.jpg)
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