update line scanner

app.py

@@ -1,4 +1,31 @@
 import streamlit as st
+import matplotlib.pyplot as plt
+import numpy as np
+from PIL import Image
 
-x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+st.title("Image Scan Line Analyzer")
+st.write("Upload three images and select a common scan line to analyze.")
+
+uploaded_files = st.file_uploader("Upload Images", type=['png', 'jpg', 'jpeg', 'bmp'], accept_multiple_files=True)
+
+if len(uploaded_files) == 3:
+    min_height = min(Image.open(file).size[1] for file in uploaded_files)
+
+    line_pos = st.slider("Select Common Scan Line", 0, min_height - 1, value=min_height // 2)
+
+    scan_lines = []
+
+    for i, uploaded_file in enumerate(uploaded_files):
+        image = Image.open(uploaded_file)
+        pixels = np.array(image)
+        scan_line = pixels[line_pos, :]
+        scan_lines.append(scan_line)
+
+    plt.figure()
+    for i, (line, file) in enumerate(zip(scan_lines, uploaded_files)):
+        plt.plot(line, label=f'{file.name}')
+    plt.xlabel('Pixel Position')
+    plt.ylabel('Pixel Value')
+    plt.title('Comparison of Scan Lines Across Images')
+    plt.legend()
+    st.pyplot(plt)

requirements.txt

@@ -0,0 +1,3 @@
+matplotlib
+numpy
+Pillow