ステガノグラフィーなるものをドラマで知ったので使ってみたいと思いPythonをインストールして以下のコードをコピペして実行しました。choose
fileでjpgの画像を選択しましたが読み込まれません。

encript.py

```

    from tkinter import *
    from PIL import Image, ImageTk
    from tkinter import filedialog
    import cv2
    import numpy as np
    import math
    
    global path_image
    
    image_display_size = 300, 300
    
    def on_click():
        # Step 1.5
        global path_image
        # use the tkinter filedialog library to open the file using a dialog box.
        # obtain the image of the path
        path_image = filedialog.askopenfilename()
        # load the image using the path
        load_image = Image.open(path_image)
        # set the image into the GUI using the thumbnail function from tkinter
        load_image.thumbnail(image_display_size, Image.ANTIALIAS)
        # load the image as a numpy array for efficient computation and change the type to unsigned integer
        np_load_image = np.asarray(load_image)
        np_load_image = Image.fromarray(np.uint8(np_load_image))
        render = ImageTk.PhotoImage(np_load_image)
        img = Label(app, image=render)
        img.image = render
        img.place(x=20, y=50)
    
    def encrypt_data_into_image():
        # Step 2
        global path_image
        data = txt.get(1.0, "end-1c")
        # load the image
        img = cv2.imread(path_image)
        # break the image into its character level. Represent the characyers in ASCII.
        data = [format(ord(i), '08b') for i in data]
        _, width, _ = img.shape
        # algorithm to encode the image
        PixReq = len(data) * 3
    
        RowReq = PixReq/width
        RowReq = math.ceil(RowReq)
    
        count = 0
        charCount = 0
        # Step 3
        for i in range(RowReq + 1):
            # Step 4
            while(count < width and charCount < len(data)):
                char = data[charCount]
                charCount += 1
                # Step 5
                for index_k, k in enumerate(char):
                    if((k == '1' and img[i][count][index_k % 3] % 2 == 0) or (k == '0' and img[i][count][index_k % 3] % 2 == 1)):
                        img[i][count][index_k % 3] -= 1
                    if(index_k % 3 == 2):
                        count += 1
                    if(index_k == 7):
                        if(charCount*3 < PixReq and img[i][count][2] % 2 == 1):
                            img[i][count][2] -= 1
                        if(charCount*3 >= PixReq and img[i][count][2] % 2 == 0):
                            img[i][count][2] -= 1
                        count += 1
            count = 0
        # Step 6
        # Write the encrypted image into a new file
        cv2.imwrite("encrypted_image.png", img)
        # Display the success label.
        success_label = Label(app, text="Encryption Successful!",
                    bg='lavender', font=("Times New Roman", 20))
        success_label.place(x=160, y=300)
    
    # Step 1
    # Defined the TKinter object app with background lavender, title Encrypt, and app size 600*600 pixels.
    app = Tk()
    app.configure(background='lavender')
    app.title("Encrypt")
    app.geometry('600x600')
    # create a button for calling the function on_click
    on_click_button = Button(app, text="Choose Image", bg='white', fg='black', command=on_click)
    on_click_button.place(x=250, y=10)
    # add a text box using tkinter's Text function and place it at (340,55). The text box is of height 165pixels.
    txt = Text(app, wrap=WORD, width=30)
    txt.place(x=340, y=55, height=165)
    
    encrypt_button = Button(app, text="Encode", bg='white', fg='black', command=encrypt_data_into_image)
    encrypt_button.place(x=435, y=230)
    app.mainloop()
    
```
CC BY-SA 4.0
2021-01-19T05:52:01.237
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2021-01-19T06:23:09.497
2021-01-19T06:23:09.497
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question
python
Pythonでステガノグラフィーを試したいと思ったがエラーがでました。