Tips for Python beginners to use Scikit-image examples for themselves 4 Use GUI

Tips for Python beginners to use the Scikit-image example for themselves Tips for Python beginners to use the Scikit-image example for themselves 2 Process multiple files Tips 3 for Python beginners to use Scikit-image examples for themselves Next, I will write the content for Python beginners to play with the example of Scikit-image with a slight modification.

In order for a third party to use a tool created using OpenCV-Python and Scikit-image, it is necessary to be able to start the tool using a command line interface or GUI.

** To use the command line interface **

See OpenCV for Python beginners. From the set of OpenCV downloaded while referring to it (folder of opencv_2.4) \ sources \ samples \ python2 (folder of opencv_3.1) \ sources \ samples \ python See the sample Python script at.

An example using sys.argv is a good example for using the command line interface.

filename = sys.argv[1]

Is a typical usage. If you are using cygwin etc., you can find it by typing> grep sys.argv * .py.

** To use GUI (for Tk) **

If you make it so that you can operate it only with the GUI when you double-click the icon, it will be easier for people who do not know the Python language to use it. The Python language has a GUI library called Tkinter in the standard distribution. Using this, you can easily describe the realization of a common GUI for Windows and Linux. A common situation where you want to use the GUI is when specifying input and output filenames. In the case of a script that someone will use, you will want to enter the filename in the GUI. One of the usages I often use is to create a tool created in C / C ++ language so that it works on the command line, and give the file name to the tool with tkFileDialog. filename=tkFileDialog.askopenfilename(filetypes=fTyp,initialdir=iDir) It is to get it like this. Also message tkMessageBox.showinfo ('Title','Message to display') Display with or ask YesNO questions tkMessageBox.askquestion ('Title','Question Content') I often use it. The following is an example of my typical usage (Note).

Tkinter has the ability to create more sophisticated GUIs. But I'm spending time without creating such a fancy GUI.

.py:gui_example.py

# -*- coding: cp932 -*-
import sys, os, string, glob
import Tkinter
import tkMessageBox
import tkFileDialog
if __name__=='__main__':
    root=Tkinter.Tk()
    root.withdraw()

    doc=u"""Tool to display avi file
Video file to display(avi, mp4)Please specify.
"""
    tkMessageBox.showinfo('aviviewer.py',doc)
    fTyp=[('movie file','*.avi;*.mp4'),]

    filename=tkFileDialog.askopenfilename(filetypes=fTyp,
                                          initialdir='.')
    
    assert(os.path.isfile(filename))
    cmd='''aviViewer.exe "%s"''' % filename
    os.system(cmd)
    doc=u"""aviViewer.Exit py.
"""
    tkMessageBox.showinfo('aviViewer.py',doc)
    

An example of an article in Japanese tkFileDialog [Python] Try using the dialog to open a file using Tkinter (tkFileDialog).

tkMessageBox Article Displaying a MessageBox using Tkinter in Python.

Task:

Tips for Python beginners to use the Scikit-image example for themselves 2 Process multiple files Based on the example shown in, let's rewrite it to give a file by using tkFileDialog.askopenfilename () instead of for name in glob.glob ("* .jpg ") :.

Note: This is just an example for adding a GUI in Python. Since OpenCV-Python itself can read and display AVI files, there is no need to execute exe format commands. By not including the GUI in the part developed in the C / C ++ language in this way, it is possible to reduce OS dependency and dependence on commercial libraries.

** Addendum: If you want to add options to the command line **

If you want to add functionality equivalent to command line options where Unix commands start with-or- You can also use the following standard library. (However, I don't use it much in my case.)

Python standard library getopt — C-style command line option parser

Python standard library argparse — parser for command line options, arguments and subcommands

Hint 5 Incorporate into network application