Update app.py

app.py

@@ -219,6 +219,23 @@ def add_indices(image, nir_band, red_band, blue_band):
     )
     return image.addBands([neg_cloud, ndvi, evi, evi2])
 
+def get_histogram(image, geometry, bins):
+    # Get image values as a list
+    values = image.reduceRegion(
+        reducer=ee.Reducer.toList(),
+        geometry=geometry,
+        scale=10,
+        maxPixels=1e13
+    ).get('NDVI')
+
+    # Convert values to a NumPy array
+    values_array = np.array(values.getInfo())
+
+    # Compute the histogram on bins
+    hist, bin_edges = np.histogram(values_array, bins=bins)
+
+    return hist, bin_edges
+
 
 def process_date(daterange, satellite, veg_indices):
     start_date, end_date = daterange
@@ -524,6 +541,9 @@ if "result" in st.session_state:
                     raise ValueError(f"Unknown satellite: {satellite}")
 
                 if veg_index=='NDVI':
+                    bins=[0, 0.1, 0.2, 0.3, 0.4, 0.5]
+                    histogram, bin_edges = get_histogram(mosaic.select(veg_index), ee_geometry, bins)
+                    print(histogram, bin_edges, bins)
                     m.add_legend(title="NDVI Class/Value",
                                 legend_dict={'<0:Waterbody': '#0000FF',
                                              '0-0.1: Open': '#FF0000',