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import cv2
import numpy as np
import matplotlib.pyplot as plt
image = cv2.imread("INDIA.jpg")
if image is None:
    print("Error: Image not found.")
    exit()
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

_, binary = cv2.threshold(
    gray, 127, 255, cv2.THRESH_BINARY
)
kernel = np.ones((5, 5), np.uint8)
while True:

    print("\n========== MORPHOLOGICAL OPERATIONS===========")
    print("1. Display Original Image")
    print("2. Display Binary Image")
    print("3. Erosion")
    print("4. Dilation")
    print("5. Display Erosion and Dilation")
    print("6. Exit")

    choice = input("Enter your choice: ")
    if choice == "1":
        plt.imshow(
            cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
        )
        plt.title("Original Image")
        plt.axis("off")
        plt.show()

    elif choice == "2":

        plt.imshow(binary, cmap="gray")
        plt.title("Binary Image")
        plt.axis("off")
        plt.show()
    elif choice == "3":

        erosion = cv2.erode(
            binary,
            kernel,
            iterations=1
        )

        print("\nDisplaying Eroded Image...")

        plt.imshow(erosion, cmap="gray")
        plt.title("Erosion")
        plt.axis("off")
        plt.show()

    elif choice == "4":

        dilation = cv2.dilate(
            binary,
            kernel,
            iterations=1
        )

        print("\nDisplaying Dilated Image...")

        plt.imshow(dilation, cmap="gray")
        plt.title("Dilation")
        plt.axis("off")
        plt.show()
        
        
    elif choice == "5":
        erosion=cv2.erode(
            binary,
            kernel,
            iterations=1)
        delation=cv2.dilate(
            binary,kernel,iterations=1)
        
        dilation=cv2.dilate(
            binary,
            kernel,
            iterations=1)
        
        plt.figure(figsize=(12,4))
        plt.subplot(1,3,1)
        plt.imshow(binary,cmap="gray")
        plt.title("binary image")
        plt.axis("off")
        
        plt.subplot(1,3,2)
        plt.imshow(binary,cmap="gray")
        plt.title("erosion")
        plt.axis("off")
        
        plt.subplot(1,3,3)
        plt.imshow(binary,cmap="gray")
        plt.title("dilation")
        plt.axis("off")
        
        plt.show()
        
    elif choice == "6":

        print("\nProgram Terminated.")
        break

    else:

        print("\nInvalid choice. Please try again.")

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