Create app.py

app.py

@@ -0,0 +1,65 @@
+# File: logistic_map_encryptor.py
+
+import streamlit as st
+import numpy as np
+from PIL import Image
+import cv2
+import io
+
+# Logistic map function
+def logistic_map(size, key):
+    x = key
+    sequence = []
+    for _ in range(size):
+        x = 4 * x * (1 - x)  # Logistic map equation
+        sequence.append(int(x * 255) % 256)  # Map to 0-255
+    return np.array(sequence, dtype=np.uint8)
+
+# Encrypt image using logistic map
+def encrypt_image(image, key):
+    h, w, c = image.shape
+    size = h * w * c
+    chaotic_sequence = logistic_map(size, key).reshape(h, w, c)
+    encrypted_image = (image + chaotic_sequence) % 256  # Element-wise encryption
+    return encrypted_image.astype(np.uint8)
+
+# Streamlit app
+def main():
+    st.title("Chaotic Logistic Map Image Encryption")
+    st.write("Upload an image to encrypt using chaotic logistic map encryption.")
+
+    # File uploader
+    uploaded_file = st.file_uploader("Upload an image", type=["jpg", "jpeg", "png"])
+    if uploaded_file is not None:
+        # Display the uploaded image
+        input_image = Image.open(uploaded_file)
+        st.image(input_image, caption="Uploaded Image", use_column_width=True)
+
+        # Convert the image to numpy array
+        input_image_np = np.array(input_image)
+
+        # Key input
+        key = st.slider("Set the encryption key (0 < key < 1)", min_value=0.001, max_value=0.999, step=0.001)
+        if st.button("Encrypt Image"):
+            # Encrypt the image
+            encrypted_image_np = encrypt_image(input_image_np, key)
+            encrypted_image = Image.fromarray(encrypted_image_np)
+
+            # Display the encrypted image
+            st.image(encrypted_image, caption="Encrypted Image", use_column_width=True)
+
+            # Save encrypted image to a buffer
+            buffer = io.BytesIO()
+            encrypted_image.save(buffer, format="PNG")
+            buffer.seek(0)
+
+            # Provide download link for the encrypted image
+            st.download_button(
+                label="Download Encrypted Image",
+                data=buffer,
+                file_name="encrypted_image.png",
+                mime="image/png"
+            )
+
+if __name__ == "__main__":
+    main()